ASP.NET学习笔记三

1、控件的属性和方法

属性	描述
ClientID	返回控件在浏览器端生成的标识符
Controls	返回当前控件的子控件集合
EnableViewState	返回或设置当前控件是否使用视图状态功能
ID	返回或设置当前控件在页面中的唯一标识
Page	返回当前页面的父页面引用
Parent	返回当前控件父控件的引用,即其所在的容器控件
Visible	返回或设置当前控件是否呈现在页面中

2、单选按钮与复选框

 3、控制权转移控件

<h3>控制权转移控件</h3>
        <asp:Button ID="btn1" runat="server" Text="普通按钮" PostBackUrl="~/server.aspx" CommandArgument="hello" />
        <asp:LinkButton ID="lbtn2" runat="server" Text="超链接按钮" PostBackUrl="~/server.aspx" CommandArgument="hello"/>
        <asp:ImageButton ID="imgbtn3" runat="server" ImageUrl="~/images/regist.gif" PostBackUrl="~/server.aspx" CommandArgument="hello" />
        <br />

      <%--  仅仅是转换成普通的超链接a标签，不能提交 表单和跨页提交数据--%>
        <asp:HyperLink ID="hl1" runat="server" Text="普通超链接" NavigateUrl="~/server.aspx"/>

protected void Page_Load(object sender, EventArgs e)
        {
            txt.CssClass = "txt";
            //txt.Text = DateTime.Now.ToString();

            hl1.Target = "_blank";
        }

四、FileUpload控件（实现文件的上传和下载）

<form id="form1" runat="server" enctype="multipart/form-data">
    <div>
        头像：<input type="file" name="uploadFile" />
        <asp:Button ID="btnupload" runat="server" Text="上传文件" OnClick="btnupload_Click" />
    </div>
    </form>

protected void btnupload_Click(object sender, EventArgs e)
        {
            //获得客户端上传的文件集合
            HttpFileCollection files = Request.Files;
            //获得指定的文件对象
            HttpPostedFile file = files[0];
            if (file.FileName == "")
            {
                Response.Write("<script>alert('请选择文件上传');</script>");
                return;
            }
            //if(file.ContentLength>10*1024)
            //{
            //    Response.Write("<script>alert('上传的文件不能超过10KB，请压缩后上传');</script>");
            //    return;
            //}
            //组装服务器端路径
            string serverPath = "~/uploadFolder/" + file.FileName;
            serverPath = Server.MapPath(serverPath);//上传的路径必须是物理路径
            file.SaveAs(serverPath);//实现上传
            Response.Write("<script>alert('上传成功');</script>");
        }

后端代码也可以为：

protected void btnupload_Click(object sender, EventArgs e)
        {
            if(!myFile.HasFile)
            {
                Response.Write("<script>alert('请选择文件上传');</script>");
                return;
            }
            HttpPostedFile file = myFile.PostedFile;
            //if (file.ContentLength > 10 * 1024)
            //{
            //    Response.Write("<script>alert('上传的文件不能超过10KB，请压缩后上传');</script>");
            //    return;
            //}
            //组装服务器端路径
            string serverPath = "~/uploadFolder/" + file.FileName;
            serverPath = Server.MapPath(serverPath);//上传的路径必须是物理路径
            file.SaveAs(serverPath);//实现上传
            Response.Write("<script>alert('上传成功');</script>");
        }

批量上传文件代码：

<form id="form1" runat="server" enctype="multipart/form-data">
    <div>
        <input type="button" name="btnaddFile" value="点击上传" id="btnaddFile" />
         <asp:Button ID="btnuploadFile" runat="server" Text="批量上传" OnClick="btnuploadFile_Click"  />
    </div>

    <div id="files">

    </div>

       
    </form>

    <script src="scripts/jquery.js"></script>
    <script>
        $(function () {
            var i = 1;
            $("#btnaddFile").click(function () {              

                var file = $("<input type='file' class='file' name='file" + i + "'/><br/>");
                $("#files").append(file);
                i++;
            })
        })
    </script>

protected void btnuploadFile_Click(object sender, EventArgs e)
        {
            if (Request.Files.Count == 0)            
                return;
            int count = 0;
            for(int i = 0; i < Request.Files.Count; i++)
            {
                HttpPostedFile file = Request.Files[i];
                string name = file.FileName;

                if(name!="")
                {
                    string path = "~/uploadFolder/" + name;
                    path = Server.MapPath(path);

                    file.SaveAs(path);

                    count++;
                }
            }

            Response.Write("<script>alert('成功上传" + count + "个文件')</script>");
           
        }

5、下载文件

<form id="form1" runat="server">
    <div>
        <asp:HyperLink ID="hlDownLoad" runat="server" Text="点击下载"/><br />

        <asp:Button ID="btnDownLoad" runat="server" Text="点击下载"  OnClick="btnDownLoad_Click"/>
    </div>
    </form>

protected void Page_Load(object sender, EventArgs e)
        {
            //下载时提代文件的虚拟路径或相对路径
            //hlDownLoad.NavigateUrl = "~/uploadFolder/逻辑题.doc";
            //hlDownLoad.Text = "逻辑题.doc";

            //hlDownLoad.NavigateUrl = "~/uploadFolder/test.xlsx";
            //hlDownLoad.Text = "test.xlsx";

            //hlDownLoad.NavigateUrl = "~/uploadFolder/test.txt";
            //hlDownLoad.Text = "test.txt";

            hlDownLoad.NavigateUrl = "~/uploadFolder/book.jpg";
            hlDownLoad.Text = "book.jpg";
        }

        protected void btnDownLoad_Click(object sender, EventArgs e)
        {
            string fileName = "book.jpg";
            string path = "~/uploadFolder/" + fileName;
            path = Server.MapPath(path);
            byte[] bytes = null;
            using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
            {
                //创建字节数组缓冲区
                 bytes= new byte[fs.Length];
                //读取文件到字节数组中
                fs.Read(bytes, 0, bytes.Length);
            }
            //通知浏览器文件是以附件形式下载，而不是直接打开的
            Response.AddHeader("Content-Disposition", "attachment;Filename="+fileName);
            //将缓冲区的字节数组下载到本地
            Response.BinaryWrite(bytes);
            //停止当前页的执行
            Response.End();
        }

6、droplist和listbox控件

<form id="form1" runat="server">
    <div>
        班级：<asp:DropDownList ID="drpClass" runat="server"
            OnSelectedIndexChanged="drpClass_SelectedIndexChanged" Width="150">             
               </asp:DropDownList>
        <br />

        学员：<asp:ListBox ID="lstStudents" runat="server" Width="150" SelectionMode="Multiple">            
           </asp:ListBox>
    </div>
    </form>
    <script src="scripts/jquery.js"></script>
    <script>
        $(function () {

            $("#drpClass").change(function () {
               var cno=$(this).val();//班级编号
               if (cno != "-99")
                   $("#form1").submit();//手动提交表单
               else
                   $("#lstStudents").get(0).options.length = 0; //清空下拉列表            
            })


        })
    </script>

private void LoadClass()
        {
           
            List<@class> lstClass = db.@class.ToList();
            lstClass.Insert(0,new @class { className = "--请选择班级--", classNo = "-99" });

            #region 方法1：使用Items属性
            //foreach (var c in lstClass)
            //{
            //    ListItem item = new ListItem { Text = c.className, Value = c.classNo };
            //    drpClass.Items.Add(item);
            //}
            
            #endregion

            #region 方法2：使用DataSource属性
            drpClass.DataSource = lstClass;//设置数据源
            drpClass.DataTextField = "className";//显示的属性是数据源中的哪个字段或属性
            drpClass.DataValueField = "classNo";//隐藏的属性是数据源中的哪个字段或属性
            drpClass.DataBind();//将当前控件的数据绑定至控件中，一定要调用
            #endregion
        }

        /// <summary>
        /// 班级下拉列表选项改变时触发
        /// </summary>       
        protected void drpClass_SelectedIndexChanged(object sender, EventArgs e)
        {
            string cno = drpClass.SelectedValue;//获取当前选中班级的班级编号
            LoadStudents(cno);
           
        }
        /// <summary>
        /// 根据班级编号加载学员
        /// </summary>
        /// <param name="cno">班级编号</param>
        private void LoadStudents(string cno)
        {
            List<student> lststus = db.student.Where(s => s.classNo == cno).ToList();          

            lstStudents.DataSource = lststus;
            lstStudents.DataTextField = "sname";
            lstStudents.DataValueField = "sno";
            lstStudents.DataBind();
        }

 7.验证控件

<form id="form1" runat="server">
        <div>
            <div>
                <label>用户名：</label>
                <asp:TextBox ID="txtUserName" runat="server" />
                <asp:RequiredFieldValidator ID="userNameRequiredValidator" runat="server"
                    ErrorMessage="用户名不能为空" ControlToValidate="txtUserName" SetFocusOnError="True" Display="None" />
            </div>
            <div>
                <label>密码：</label>
                <asp:TextBox ID="txtPwd" runat="server" />
                <asp:RequiredFieldValidator ID="pwdRequiredValidator" runat="server"
                    ErrorMessage="密码不能为空" ControlToValidate="txtPwd" SetFocusOnError="True" Display="None" />
            </div>
            <div>
                <label>确认密码：</label>
                <asp:TextBox ID="txtPwdConfirm" runat="server" />
                <asp:RequiredFieldValidator ID="pwdConfirmRequiedValidator" runat="server"
                    ErrorMessage="确认密码不能为空" ControlToValidate="txtPwdConfirm" SetFocusOnError="True" Display="Dynamic" />
                <asp:CompareValidator ID="pwdComapreValidator" runat="server" ErrorMessage="两次密码不一致"
                    ControlToCompare="txtPwd" ControlToValidate="txtPwdConfirm" Display="Dynamic" />
            </div>
            <div>
                <label>出生日期：</label>
                <asp:TextBox ID="txtBirth" runat="server" />
                <asp:CompareValidator ID="birthCompareValidator" runat="server" ErrorMessage="出生日期有误"
                    ControlToValidate="txtBirth" Display="Dynamic" Operator="LessThan" Type="Date" />
            </div>
            <div>
                <label>工作年限：</label>
                <asp:TextBox ID="txtWorkYears" runat="server" />
                <asp:RangeValidator ID="workYearsRangeValidator" runat="server"
                    ErrorMessage="工作年限必须在3-10年" ControlToValidate="txtWorkYears"
                    MaximumValue="10" MinimumValue="3" SetFocusOnError="True" Type="Double" />
            </div>

            <div>
                <label>工作邮箱：</label>
                <asp:TextBox ID="txtEmail" runat="server" />
                <asp:RegularExpressionValidator ID="emailRegularValiator" runat="server" ErrorMessage="电子邮箱不正确"
                    SetFocusOnError="true" ValidationExpression="w+@w+.w+" ControlToValidate="txtEmail" />
            </div>

            <div>
                <label>掌握技能：</label>
                <asp:CheckBox ID="chk1" runat="server" Text="C#" />
                <asp:CheckBox ID="chk2" runat="server" Text="SQL Server" />
                <asp:CheckBox ID="chk3" runat="server" Text="javascript" />
                <asp:CheckBox ID="chk4" runat="server" Text="asp.net" />
                <asp:CustomValidator ID="skillValidator" runat="server" ErrorMessage="至少掌握两项技能"
                    OnServerValidate="skillValidator_ServerValidate"
                    ClientValidationFunction="checkSkill" />
            </div>

            <div>
                <asp:Button ID="btnsubmit" runat="server" Text="注册" OnClick="btnsubmit_Click" ValidationGroup="A" />
            </div>
        </div>

        <div>
            <asp:ValidationSummary ID="ValidationSummary1" runat="server" ShowMessageBox="true" ShowSummary="false"/>
        </div>
    </form>

protected void Page_Load(object sender, EventArgs e)
        {
            //设置出生日期比较验证控件要比较的值是当前系统日期
            birthCompareValidator.ValueToCompare = DateTime.Now.ToShortDateString();
        }
        /// <summary>
        /// 强制重新验证
        /// </summary>
        //public override void Validate()
        //{
        //    if (txtUserName.Text.Length < 6)
        //        userNameRequiredValidator.IsValid = false;
        //}

        protected void btnsubmit_Click(object sender, EventArgs e)
        {
            if (IsValid)
                Response.Write("ok");
        }

        protected void skillValidator_ServerValidate(object source, ServerValidateEventArgs args)
        {
            int count = 0;
            if (chk1.Checked)
                count++;
            if (chk2.Checked)
                count++;
            if (chk3.Checked)
                count++;
            if (chk4.Checked)
                count++;
            if (count < 2)
            {
                args.IsValid = false;
            }
        }

8.简单绑定

示例1：

 <form id="form1" runat="server">
    <div>
        <div>
            姓名：<asp:TextBox ID="txtname" runat="server" Text="<%#name%>" /><br />
            年龄：<%=age%><br />
            头像：<asp:Image ID="imgFace" runat="server" ImageUrl="<%#path%>" /><br />

        </div>

        <div>
            <%
                for(int i=0;i<10;i++)
                {
                    Response.Write(i + "<br>");
                }
            %>
        </div>
    </div>
    </form>

public string name = "张三";
        public string path = "~/images/1.gif";
        public int age = 20;
        protected void Page_Load(object sender, EventArgs e)
        {
            //this:aspx文件形成的类
            //Response.Write(this.GetType().ToString()+"<br/>");
            //Response.Write(this.GetType().BaseType.ToString());

            this.DataBind();
        }

示例2：

<form id="form1" runat="server">
    <div>
        <table border="1" style="1000px">
            <tr>
                <td colspan="3" style="text-align:center"><h3>人气投票</h3></td>
            </tr>
            <tr>
                <td class="auto-style1">张三</td>
                <td class="auto-style2">
                    <asp:Label ID="lblZS" runat="server" BackColor="Yellow" 
                        Text="<%#zs%>" Width="<%#zs*10 %>" />
                    <%#GetPercent(zs)%>
                </td>
                <td>
                    <asp:Button ID="btnZS" runat="server" Text="投票" OnClick="btnZS_Click" />
                </td>
            </tr>
             <tr>
                <td class="auto-style1">李四</td>
                <td class="auto-style2">
                    <asp:Label ID="lblLS" runat="server" BackColor="Green"
                         Text="<%#ls%>" Width="<%#ls*10 %>" />
                        <%#GetPercent(ls)%>
                </td>
                <td>
                    <asp:Button ID="btnLS" runat="server" Text="投票" OnClick="btnLS_Click"/>
                </td>
            </tr>
             <tr>
                <td class="auto-style1">王五</td>
                <td class="auto-style2">
                    <asp:Label ID="lblWW" runat="server" BackColor="YellowGreen" 
                        Text="<%#ww%>" Width="<%#ww*10 %>" />
                        <%#GetPercent(ww)%>
                </td>
                <td>
                    <asp:Button ID="btnWW" runat="server" Text="投票" OnClick="btnWW_Click" />
                </td>
            </tr>
        </table>
    </div>
    </form>

public static int zs = 0;
        public static int ls = 0;
        public static int ww = 0;
        protected void Page_Load(object sender, EventArgs e)
        {
            if(!IsPostBack)
                this.DataBind();
        }

        protected void btnZS_Click(object sender, EventArgs e)
        {
            zs++;
            this.DataBind();
        }

        protected void btnLS_Click(object sender, EventArgs e)
        {
            ls++;
            this.DataBind();
        }

        protected void btnWW_Click(object sender, EventArgs e)
        {
            ww++;
            this.DataBind();
        }

        /// <summary>
        /// 计算百分比
        /// </summary>
        /// <param name="num"></param>
        /// <returns></returns>
        public string GetPercent(double num)
        {
            if (num == 0)
                return "0.00%";
            double sum = zs + ls + ww;
            double rate = num*100 / sum;
            return rate.ToString("n2") + "%";
        }

9.GridView数据绑定控件

         列的类型

BoundField         设置DataField="要绑定数据源中的字段"
HypterLinkField  设置DataTextField="要显示的是数据源中的哪个字段"
                           DataNavigateUrlFormatString="要跳转的页面路径"
                           DataNavigateUrlFields="页面路径中查询字符串的值是哪个属性"
CheckBoxField   设置DataField="要绑定数据源中的布尔类型的字段"
ImageField         设置DataImageUrlField="要绑定数据源中的图片路径的字段"
ButtonField         显示按钮 ，可以设置CommandName，用以指定按钮的用途
CommandField   显示指定的操作，如删除，编辑

TemplateField    模板列，用于自定义显示数据
                           HeaderTemplate:头部模板 显示提示信息
                           FooterTemplate:脚注模板 显示汇总信息 设置GridView ShowFooter="true"
                           ItemTemplate:项目模板 绑定数据源中要显示的属性或字段 <%#Bind("字段")%>
                           AlternatingItemTemplate:交替项模板
                           EditItemTemplate:编辑模板

示例1：

<form id="form1" runat="server">
        <div>
            <asp:GridView ID="gvStudents"  runat="server" AutoGenerateColumns="false" OnRowDeleting="gvStudents_RowDeleting">
                <Columns>
                    <asp:BoundField HeaderText="学号" DataField="sno" />
                    <asp:HyperLinkField HeaderText="姓名" DataTextField="sname"
                        DataNavigateUrlFormatString="~/details.aspx?no={0}"
                        DataNavigateUrlFields="sno" />
                    <asp:CheckBoxField HeaderText="性别" DataField="sex" />
                    <asp:BoundField HeaderText="邮箱" DataField="semail" />
                    <asp:BoundField HeaderText="地址" DataField="saddress" />
                    <asp:BoundField HeaderText="出生日期" DataField="sbirthday" DataFormatString="{0:yyyy-MM-dd}" />
                    <asp:ImageField HeaderText="头像" DataImageUrlField="faceUrl" />
                    <asp:ButtonField HeaderText="" Text="删除" ButtonType="Button" CommandName="delete"/>
                    <asp:CommandField HeaderText="操作" ShowDeleteButton="true" ShowEditButton="true" ShowSelectButton="true" ButtonType="Button" /> 
                </Columns>
            </asp:GridView>
        </div>
    </form>

 StuDBDataContext db = new StuDBDataContext();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
                LoadStudents();
        }

        private void LoadStudents()
        {
            List<student> lstStudents = db.student.ToList();
            foreach (var item in lstStudents)
            {
                item.faceUrl = "~/images/" + item.faceUrl;
            }

            gvStudents.DataSource = lstStudents;

            this.DataBind();
        }

        protected void gvStudents_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            Response.Write("删除成功");
        }

示例2：

<form id="form1" runat="server">
    <div>
        <asp:GridView ID="gvStudents" runat="server" AutoGenerateColumns="false"
             ShowFooter="true">
            <Columns>
               <%-- 学号--%>
                <asp:TemplateField>
                    <HeaderTemplate>学号</HeaderTemplate>
                   <%-- <FooterTemplate>
                        <asp:TextBox ID="txt" runat="server" />
                    </FooterTemplate>--%>
                    <ItemTemplate>
                        <asp:Label ID="lblsno" runat="server" Text='<%#Bind("sno") %>' />
                    </ItemTemplate>
                   <%-- <AlternatingItemTemplate>
                         <asp:TextBox ID="txtsno" runat="server" Text='<%#Bind("sno") %>' />
                    </AlternatingItemTemplate>--%>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtsno" runat="server" Text='<%#Bind("sno") %>' />
                    </EditItemTemplate>
                </asp:TemplateField>
            
               <%-- 姓名--%>
                <asp:TemplateField HeaderText="姓名">
                     <ItemTemplate>
                        <asp:Label ID="lblsname" runat="server" Text='<%#Eval("sname") %>' />
                         <%--<asp:HyperLink ID="hlsname" runat="server" NavigateUrl="~/details.aspx" 
                             Text='<%#Eval("sname") %>' />--%>
                    </ItemTemplate>
                </asp:TemplateField>

               <%-- 性别--%>
                <asp:TemplateField HeaderText="性别">
                    <ItemTemplate>
                         <asp:Label ID="lblsex" runat="server" Text='<%#(bool)Eval("sex")?"男":"女"%>' />
                    </ItemTemplate>
                </asp:TemplateField>

                <%--邮箱--%>
                 <asp:TemplateField HeaderText="邮箱">
                     <ItemTemplate>
                        <asp:Label ID="lblsemail" runat="server" Text='<%#Eval("semail") %>' />                        
                    </ItemTemplate>
                </asp:TemplateField>

                  <%--家庭地址--%>
                 <asp:TemplateField HeaderText="家庭地址">
                     <ItemTemplate>
                        <asp:Label ID="lblsaddress" runat="server" Text='<%#Eval("saddress") %>' />                        
                    </ItemTemplate>
                </asp:TemplateField>

                 <%--出生日期--%>
                 <asp:TemplateField HeaderText="出生日期">
                     <ItemTemplate>
                        <asp:Label ID="lblsbirthday" runat="server" Text='<%#((DateTime)Eval("sbirthday")).ToShortDateString() %>' />                        
                    </ItemTemplate>
                </asp:TemplateField>

                <%--头像--%>
                 <asp:TemplateField HeaderText="头像">
                     <ItemTemplate>
                       <asp:Image ID="imgface" runat="server" ImageUrl='<%#Eval("faceUrl") %>' />                        
                    </ItemTemplate>
                </asp:TemplateField>

                <%--操作--%>
                <asp:TemplateField HeaderText="头像">
                    <ItemTemplate>
                        <asp:Button ID="btndelete" runat="server" Text="删除" CommandName="delete" />
                        <asp:LinkButton ID="btnedit" runat="server" Text="编辑" CommandName="edit"/>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
    </div>
    </form>

StuDBDataContext db = new StuDBDataContext();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
                LoadStudents();
        }
        private void LoadStudents()
        {
            List<student> lstStudents = db.student.ToList();
            foreach (var item in lstStudents)
            {
                item.faceUrl = "~/images/" + item.faceUrl;
            }
            gvStudents.DataSource = lstStudents;

            this.DataBind();
        }

示例3：

<form id="form1" runat="server">
    <div id="divdata">
        <asp:GridView ID="gvStudents" runat="server" DataKeyNames="sno"
             AutoGenerateColumns="false" OnRowDeleting="gvStudents_RowDeleting" 
            OnRowEditing="gvStudents_RowEditing" OnRowCancelingEdit="gvStudents_RowCancelingEdit"
             OnRowDataBound="gvStudents_RowDataBound" OnRowUpdating="gvStudents_RowUpdating"
             AllowPaging="true" PageSize="3" OnPageIndexChanging="gvStudents_PageIndexChanging" OnSelectedIndexChanging="gvStudents_SelectedIndexChanging">
            <Columns>
               <%-- 复选框--%>
                <asp:TemplateField>
                    <HeaderTemplate>
                        <input type="checkbox" id="chkAll" />
                    </HeaderTemplate>
                    <ItemTemplate>
                        <asp:CheckBox ID="chkDelete" runat="server"/>
                    </ItemTemplate>
                </asp:TemplateField>
                <%--学号--%>
                 <asp:TemplateField HeaderText="学号">                       
                    <ItemTemplate>
                        <asp:Label ID="lblsno" runat="server" Text='<%#Bind("sno") %>' />
                    </ItemTemplate>                                 
                    <EditItemTemplate>
                        <asp:TextBox ID="txtsno" runat="server" Text='<%#Bind("sno") %>' ReadOnly="true" />
                    </EditItemTemplate>
                </asp:TemplateField>

                  <%-- 姓名--%>
                <asp:TemplateField HeaderText="姓名">
                     <ItemTemplate>
                        <asp:Label ID="lblsname" runat="server" Text='<%#Eval("sname") %>' />                        
                    </ItemTemplate>
                    <EditItemTemplate>
                         <asp:TextBox ID="txtsname" runat="server" Text='<%#Bind("sname") %>' />
                    </EditItemTemplate>
                </asp:TemplateField>

                  <%-- 性别--%>
                <asp:TemplateField HeaderText="性别">
                    <ItemTemplate>
                         <asp:Label ID="lblsex" runat="server" Text='<%#(bool)Eval("sex")?"男":"女"%>' />
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:DropDownList ID="drpSex" runat="server">
                            <asp:ListItem Value="-1">--请选择--</asp:ListItem>
                             <asp:ListItem Value="1">男</asp:ListItem>
                             <asp:ListItem Value="0">女</asp:ListItem>
                        </asp:DropDownList>
                    </EditItemTemplate>
                </asp:TemplateField>

                  <%--邮箱--%>
                 <asp:TemplateField HeaderText="邮箱">
                     <ItemTemplate>
                        <asp:Label ID="lblsemail" runat="server" Text='<%#Eval("semail") %>' />                        
                    </ItemTemplate>
                     <EditItemTemplate>
                         <asp:TextBox ID="txtsemail" runat="server" Text='<%#Bind("semail") %>' />
                     </EditItemTemplate>
                </asp:TemplateField>
                  <%--家庭地址--%>
                 <asp:TemplateField HeaderText="家庭地址">
                     <ItemTemplate>
                        <asp:Label ID="lblsaddress" runat="server" Text='<%#Eval("saddress") %>' />                        
                    </ItemTemplate>
                      <EditItemTemplate>
                         <asp:TextBox ID="txtsaddress" runat="server" Text='<%#Bind("saddress") %>' />
                     </EditItemTemplate>
                </asp:TemplateField>

                 <%--出生日期--%>
                 <asp:TemplateField HeaderText="出生日期">
                     <ItemTemplate>
                        <asp:Label ID="lblsbirthday" runat="server" Text='<%#((DateTime)Eval("sbirthday")).ToShortDateString() %>' />                        
                    </ItemTemplate>
                        <EditItemTemplate>
                         <asp:TextBox ID="txtsbirthday" runat="server" Text='<%#Bind("sbirthday") %>' />
                     </EditItemTemplate>
                </asp:TemplateField>

                <%--头像--%>
                 <asp:TemplateField HeaderText="头像">
                     <ItemTemplate>
                       <asp:Image ID="imgface" runat="server" ImageUrl='<%#Eval("faceUrl") %>' />                        
                    </ItemTemplate>
                      <EditItemTemplate>
                         <asp:TextBox ID="txtface" runat="server" Text='<%#Bind("faceUrl") %>' />
                     </EditItemTemplate>
                </asp:TemplateField>

                <%--操作--%>
                <asp:TemplateField HeaderText="头像">
                    <ItemTemplate>
                        <asp:Button ID="btndelete" runat="server" Text="删除" CommandName="delete" />
                        <asp:Button ID="btnedit" runat="server" Text="编辑" CommandName="edit"/>
                        <asp:Button ID="btnselect" runat="server" Text="选择" CommandName="select" />
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:Button ID="btnupdate" runat="server" Text="更新" CommandName="update" />
                        <asp:Button ID="btncancel" runat="server" Text="取消" CommandName="cancel" />
                    </EditItemTemplate>
                </asp:TemplateField>

               
            </Columns>
        </asp:GridView>
        <asp:Button ID="btnDeleteAll" runat="server" Text="全部删除" OnClick="btnDeleteAll_Click" />
        <asp:TextBox ID="txtsnos" runat="server" Width="300"/>
    </div>
    </form>
    <script src="scripts/jquery.js"></script>
    <script>
        $(function () {
            $("#txtsnos").css("display", "none");
            //设置表格的样式
            $("#gvStudents tbody tr:eq(0)").css({ "height": "30px","background":"pink" });
            $("#gvStudents tbody tr:gt(0):odd").css("background", "lightblue");
            $("#gvStudents tbody tr:gt(0):even").css("background", "#ccc");
            var oldbg;
            $("#gvStudents tbody tr:gt(0)").mouseover(function () {
                oldbg = $(this).css("background");
                $(this).css("background", "yellow");
            }).mouseout(function () {
                $(this).css("background", oldbg);
            })

            //全选
            $("#chkAll").click(function () {
                var state=$(this).prop("checked");
                $(":checkbox[id*=chkDelete]").each(function (i, chk) {
                    //$(chk).prop("checked", state);
                    //如果当前复选框的状态和全选复选框的状态不一致，就做点击
                    if ($(chk).prop("checked") != state)
                        $(chk).click();
                })
            })

            //反选
            $(":checkbox[id*=chkDelete]").click(function () {
                var flag = $(":checkbox[id*=chkDelete]").length == $(":checkbox[id*=chkDelete]:checked").length;
                $("#chkAll").prop("checked", flag);

                var sno=$(this).parent().next().children("span").html();//获得当前复选框的父元素td的下一个兄弟元素td的子元素span中的html代码
                //点击每一行前面的复选框时
                //判断当前复选框点击是选中状态还是取消选中状态
                if ($(this).prop("checked")) {
                    $("#txtsnos").val($("#txtsnos").val()+sno+";");//如果选中，则将当前的学号保存至文本框中
                } else {
                    $("#txtsnos").val($("#txtsnos").val().replace(sno + ";", ""));//如果是取消选中，则从文本框中删除学号
                }
            })

            //删除
            $(":input[id*=btndelete]").click(function () {
                if (!confirm("确定要删除吗?"))
                    return false;
            })

            //全部删除
            $("#btnDeleteAll").click(function () {
                if (!confirm("确定要删除选中的学员吗?"))
                    return false;

            })

        })
    </script>

StuDBDataContext db = new StuDBDataContext();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
                LoadStudents();
        }

        private void LoadStudents()
        {
            List<student> lstStudents = db.student.ToList();
            foreach (var item in lstStudents)
            {
                item.faceUrl = "~/images/" + item.faceUrl;
            }
            gvStudents.DataSource = lstStudents;

            this.DataBind();
        }
        //删除
        protected void gvStudents_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            int deleteState = 0;
            try
            {
                string sno = gvStudents.DataKeys[e.RowIndex].Value.ToString();//学号               
                student stu = db.student.FirstOrDefault(s => s.sno == sno);
                db.student.DeleteOnSubmit(stu);
                db.SubmitChanges();
                deleteState = 1;

            }
            catch (Exception ex)
            {
                throw ex;
            }

            if (deleteState == 1)
            {
                LoadStudents();
                Response.Write("<script>alert('删除成功');</script>");
            }
            else
                Response.Write("<script>alert('删除失败');</script>");
        }
        //编辑
        protected void gvStudents_RowEditing(object sender, GridViewEditEventArgs e)
        {
            gvStudents.EditIndex = e.NewEditIndex;//设置要编辑的这行的索引就是当前点前的这行的索引
            LoadStudents();
        }
        //取消
        protected void gvStudents_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {
            gvStudents.EditIndex = -1;
            LoadStudents();
        }

        //更新
        protected void gvStudents_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            int index = e.RowIndex;
            GridViewRow row = gvStudents.Rows[index];

            string sno = gvStudents.DataKeys[e.RowIndex].Value.ToString();
            string sname = ((TextBox)row.FindControl("txtsname")).Text;

            bool sex = ((DropDownList)row.FindControl("drpSex")).SelectedValue == "1" ? true : false;
            string semail = ((TextBox)row.FindControl("txtsemail")).Text;
            string saddress = ((TextBox)row.FindControl("txtsaddress")).Text;
            DateTime sbirthday = Convert.ToDateTime(((TextBox)row.FindControl("txtsbirthday")).Text);
            string faceUrl = ((TextBox)row.FindControl("txtface")).Text;
            int modifyState = 0;
            try
            {
                student stu = db.student.FirstOrDefault(s => s.sno == sno);
                stu.sno = sno;
                stu.sname = sname;
                stu.sex = sex;
                stu.semail = semail;
                stu.saddress = saddress;
                stu.sbirthday = sbirthday;
                stu.faceUrl = faceUrl.Substring(faceUrl.LastIndexOf("/") + 1);
                db.SubmitChanges();
                modifyState = 1;
            }
            catch (Exception ex)
            {
                Response.Write(ex.Message);
            }

            if (modifyState == 1)
            {
                gvStudents.EditIndex = -1;//取消编辑
                LoadStudents();//重新绑定数据
                Response.Write("<script>alert('更新成功');</script>");
            }
            else
                Response.Write("<script>alert('更新失败');</script>");

        }

        //在绑定每一行时触发
        protected void gvStudents_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            //Response.Write("当前行的下标：" + e.Row.RowIndex+"<br/>");
            //Response.Write("当前行的类型：" + e.Row.RowType.ToString() + "<br/>");
            //Response.Write("当前行的状态：" + e.Row.RowState.ToString() + "<br/>");

            string sex = "";//保存当前正在绑定的学员的性别
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                string sno = gvStudents.DataKeys[e.Row.RowIndex].Value.ToString();
                //获得性别
                student stu = db.student.FirstOrDefault(s => s.sno == sno);
                sex = (bool)stu.sex ? "1" : "0";

                //判断当前正在绑定的这行学号在不在文本框
                if(txtsnos.Text.Contains(sno))
                {
                    //获得当前这行正在绑定的复选框对象
                    CheckBox chk = e.Row.FindControl("chkDelete") as CheckBox;
                    //设置它的状态为选中状态
                    chk.Checked = true;
                }               
               
            }

            //普通项处于编辑状态,交替项的编辑状态
            if (e.Row.RowState == DataControlRowState.Edit || e.Row.RowState == (DataControlRowState.Edit | DataControlRowState.Alternate))
            {
                DropDownList drpSex = e.Row.FindControl("drpSex") as DropDownList;
                if (drpSex != null)
                    drpSex.SelectedValue = sex;//设置性别下拉列表的选中状态是当前学员的性别

                TextBox txtsno = (TextBox)e.Row.FindControl("txtsno");
                txtsno.Width = 80;
            }


        }
        //分页
        protected void gvStudents_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            gvStudents.PageIndex = e.NewPageIndex;//设置页码下标
            LoadStudents();
        }

        //全部删除
        protected void btnDeleteAll_Click(object sender, EventArgs e)
        {
            string snos = txtsnos.Text;
            string[] snoArr = snos.Split(';');
            for(int i = 0; i < snoArr.Length - 1; i++)
            {
                string sno = snoArr[i];
                //student stu = db.student.FirstOrDefault(s => s.sno == sno);
                //db.student.DeleteOnSubmit(stu);
                //db.SubmitChanges();
            }
            LoadStudents();
        }      

        //选中某行时
        protected void gvStudents_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
        {
            int index = e.NewSelectedIndex;
            string sno = gvStudents.DataKeys[index].Value.ToString();
            Response.Redirect("~/details.aspx/no=" +Server.UrlEncode(sno) + "");
        }