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  • Asp.net常用的三十多个代码(非常实用


     

    1.//弹出对话框.点击转向指定页面

    Response.Write("<script>window.alert('该会员没有提交申请,请重新提交!')</script>");
    Response.Write("<script>window.location ='http://www.51aspx.com/bizpulic/upmeb.aspx'</script>");

    2.//弹出对话框

    Response.Write("<script language='javascript'>alert('产品添加成功!')</script >");

    3.//删除文件

    string filename ="20059595157517.jpg";
    pub.util.DeleteFile(HttpContext.Current.Server.MapPath("../file/")+filename);

    4.//绑定下拉列表框datalist

    System.Data.DataView dv=conn.Exec_ex("select -1 as code,'请选择经营模式' as content from dealin union select code,content from dealin");
    this.dealincode.DataSource=dv;
    this.dealincode.DataTextField="content"; //
    this.dealincode.DataValueField="code";    //id 
    this.dealincode.DataBind();
    this.dealincode.Items.FindByValue(dv[0]["dealincode"].ToString()).Selected=true;

    5.//时间去秒显示

    <%# System.DateTime.Parse(DataBinder.Eval(Container.DataItem,"begtime").ToString()).ToShortDateString

    6.//标题带链接

    <%# "<a class="12c" target="_blank" href="">"+ DataBinder.Eval(Container.DataItem,"proname")+"</a>"%>

    7.//修改转向

    <%# "<A href="editpushpro.aspx?id="+DataBinder.Eval(Container.DataItem,"code")+"">"+"修改"+"</A>"%>

    8.//弹出确定按钮

    <%# "<A id="btnDelete" onclick="return confirm('你是否确定删除这条记录吗?');" href="pushproduct.aspx?dl="+DataBinder.Eval(Container.DataItem,"code")+" ">"+"删除"+"</A>"%>

    9.//输出数据格式化 "{0:F2}" 是格式 F2表示小数点后剩两位

    <%# DataBinder.Eval(Container, "DataItem.PriceMoney","{0:F2}") %>

    10.//提取动态网页内容

    Uri uri = new Uri("http://www.51aspx.com/");
    WebRequest req = WebRequest.Create(uri);
    WebResponse resp = req.GetResponse();
    Stream str = resp.GetResponseStream();
    StreamReader sr = new StreamReader(str,System.Text.Encoding.Default);
    string t = sr.ReadToEnd();
    this.Response.Write(t.ToString());

    11.//获取" . "后面的字符

    i.ToString().Trim().Substring(i.ToString().Trim().LastIndexOf(".")+1).ToLower().Trim()
      打开新的窗口并传送参数: 
      传送参数:
    response.write("<script>window.open('*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"')</script>")
    接收参数:
    string a = Request.QueryString("id");
    string b = Request.QueryString("id1");


     12.为按钮添加对话框

    Button1.Attributes.Add("onclick","return confirm('确认?')");
    button.attributes.add("onclick","if(confirm('are you sure...?')){return true;}else{return false;}")

    13.删除表格选定记录

    int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];
    string deleteCmd = "Delete from Employee where emp_id = " + intEmpID.ToString()

    14.删除表格记录警告

    private void DataGrid_ItemCreated(Object sender,DataGridItemEventArgs e)
     {
      switch(e.Item.ItemType)
      {
      case ListItemType.Item :
      case ListItemType.AlternatingItem :
      case ListItemType.EditItem:
      TableCell myTableCell;
      myTableCell = e.Item.Cells[14];
      LinkButton myDeleteButton ;
      myDeleteButton = (LinkButton)myTableCell.Controls[0];
      myDeleteButton.Attributes.Add("onclick","return confirm('您是否确定要删除这条信息');");
      break;
      default:
      break;
      }
     }

    15.点击表格行链接另一页

    private void grdCustomer_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
     {
      //点击表格打开
       if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
      e.Item.Attributes.Add("onclick","window.open('Default.aspx?id=" + e.Item.Cells[0].Text + "');");
     }
    双击表格连接到另一页
       在itemDataBind事件中
    if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
     {
      string orderItemID =e.item.cells[1].Text;
      e.item.Attributes.Add("ondblclick", "location.href='../ShippedGrid.aspx?id=" + orderItemID + "'");
     }
    双击表格打开新一页
    if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
     {
      string orderItemID =e.item.cells[1].Text;
      e.item.Attributes.Add("ondblclick", "open('../ShippedGrid.aspx?id=" + orderItemID + "')");
     }

    16.表格超连接列传递参数

    <asp:HyperLinkColumn Target="_blank" headertext="ID号" DataTextField="id" NavigateUrl="aaa.aspx?id='
      <%# DataBinder.Eval(Container.DataItem, "数据字段1")%>' & name='<%# DataBinder.Eval(Container.DataItem, "数据字段2")%>' />

    17.表格点击改变颜色

    if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)
     {
      e.Item.Attributes.Add("onclick","this.style.backgroundColor='#99cc00';
        this.style.color='buttontext';this.style.cursor='default';");
     } 
    写在DataGrid的_ItemDataBound里
    if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)
     {
     e.Item.Attributes.Add("onmouseover","this.style.backgroundColor='#99cc00';
      this.style.color='buttontext';this.style.cursor='default';");
     e.Item.Attributes.Add("onmouseout","this.style.backgroundColor='';this.style.color='';");
     }

    18.关于日期格式

    日期格式设定

    DataFormatString="{0:yyyy-MM-dd}"

    我觉得应该在itembound事件中

    e.items.cell["你的列"].text=DateTime.Parse(e.items.cell["你的列"].text.ToString("yyyy-MM-dd"))

    19.获取错误信息并到指定页面

    //不要使用Response.Redirect,而应该使用Server.Transfer
      e.g
     // in global.asax
     protected void Application_Error(Object sender, EventArgs e) {
     if (Server.GetLastError() is HttpUnhandledException)
     Server.Transfer("MyErrorPage.aspx");
     //其余的非HttpUnhandledException异常交给ASP.NET自己处理就okay了 :)
     }
     //Redirect会导致post-back的产生从而丢失了错误信息,所以页面导向应该直接在服务器端执行,这样就可以在错误处理页面得到出错信息并进行相应的处理

    20.清空Cookie

    Cookie.Expires=[DateTime];
     Response.Cookies("UserName").Expires = 0

    21.自定义异常处理

    //自定义异常处理类 
    using System;
     using System.Diagnostics;
     namespace MyAppException
     {
      /// <summary>
      /// 从系统异常类ApplicationException继承的应用程序异常处理类。
       /// 自动将异常内容记录到Windows NT/2000的应用程序日志
       /// </summary>
      public class AppException:System.ApplicationException
      {
      public AppException()
      {
      if (ApplicationConfiguration.EventLogEnabled)LogEvent("出现一个未知错误。");
      }
      public AppException(string message)
      {
      LogEvent(message);
      }
      public AppException(string message,Exception innerException)
      {
      LogEvent(message);
      if (innerException != null)
      {
      LogEvent(innerException.Message);
      }
      }
      //日志记录类
       using System;
      using System.Configuration;
      using System.Diagnostics;
      using System.IO;
      using System.Text;
      using System.Threading;
      namespace MyEventLog
      {
      /// <summary>
      /// 事件日志记录类,提供事件日志记录支持 
      /// <remarks>
      /// 定义了4个日志记录方法 (error, warning, info, trace) 
      /// </remarks>
      /// </summary>
      public class ApplicationLog
      {
      /// <summary>
      /// 将错误信息记录到Win2000/NT事件日志中
       /// <param name="message">需要记录的文本信息</param>
      /// </summary>
      public static void WriteError(String message)
      {
      WriteLog(TraceLevel.Error, message);
      }
      /// <summary>
      /// 将警告信息记录到Win2000/NT事件日志中
       /// <param name="message">需要记录的文本信息</param>
      /// </summary>
      public static void WriteWarning(String message)
      {
      WriteLog(TraceLevel.Warning, message);  
       }
      /// <summary>
      /// 将提示信息记录到Win2000/NT事件日志中
       /// <param name="message">需要记录的文本信息</param>
      /// </summary>
      public static void WriteInfo(String message)
      {
      WriteLog(TraceLevel.Info, message);
      }
      /// <summary>
      /// 将跟踪信息记录到Win2000/NT事件日志中
       /// <param name="message">需要记录的文本信息</param>
      /// </summary>
      public static void WriteTrace(String message)
      {
      WriteLog(TraceLevel.Verbose, message);
      }
      /// <summary>
      /// 格式化记录到事件日志的文本信息格式
       /// <param name="ex">需要格式化的异常对象</param>
      /// <param name="catchInfo">异常信息标题字符串.</param>
      /// <retvalue>
      /// <para>格式后的异常信息字符串,包括异常内容和跟踪堆栈.</para>
      /// </retvalue>
      /// </summary>
      public static String FormatException(Exception ex, String catchInfo)
      {
      StringBuilder strBuilder = new StringBuilder();
      if (catchInfo != String.Empty)
      {
      strBuilder.Append(catchInfo).Append("
    ");
      }
      strBuilder.Append(ex.Message).Append("
    ").Append(ex.StackTrace);
      return strBuilder.ToString();
      }
      /// <summary>
      /// 实际事件日志写入方法
       /// <param name="level">要记录信息的级别(error,warning,info,trace).</param>
      /// <param name="messageText">要记录的文本.</param>
      /// </summary>
      private static void WriteLog(TraceLevel level, String messageText)
      {
      try
      { 
      EventLogEntryType LogEntryType;
      switch (level)
      {
      case TraceLevel.Error:
      LogEntryType = EventLogEntryType.Error;
      break;
      case TraceLevel.Warning:
      LogEntryType = EventLogEntryType.Warning;
      break;
      case TraceLevel.Info:
      LogEntryType = EventLogEntryType.Information;
      break;
      case TraceLevel.Verbose:
      LogEntryType = EventLogEntryType.SuccessAudit;
      break;
      default:
      LogEntryType = EventLogEntryType.SuccessAudit;
      break;
      }
      EventLog eventLog = new EventLog("Application", ApplicationConfiguration.EventLogMachineName, ApplicationConfiguration.EventLogSourceName );
      //写入事件日志
       eventLog.WriteEntry(messageText, LogEntryType);
      }
      catch {} //忽略任何异常
       } 
      } //class ApplicationLog
     }

    22.Panel 横向滚动,纵向自动扩展

    <asp:panel style="overflow-x:scroll;overflow-y:auto;"></asp:panel>

    23.回车转换成Tab 

    (1)

     <script language="javascript" for="document" event="onkeydown">
      if(event.keyCode==13 && event.srcElement.type!='button' && event.srcElement.type!='submit' &&     event.srcElement.type!='reset' && event.srcElement.type!=''&& event.srcElement.type!='textarea'); 
      event.keyCode=9;
     </script>


    (2)

     //当在有keydown事件的控件上敲回车时,变为tab
     public void Tab(System.Web .UI.WebControls .WebControl webcontrol) 
     { 
     webcontrol.Attributes .Add ("onkeydown", "if(event.keyCode==13) event.keyCode=9"); 
     }

    24.DataGrid超级连接列

    DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http://xx/inc/delete.aspx?ID={0}"

    25.DataGrid行随鼠标变色

    private void DGzf_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
     {
      if (e.Item.ItemType!=ListItemType.Header)
      {
      e.Item.Attributes.Add( "onmouseout","this.style.backgroundColor=""+e.Item.Style["BACKGROUND-COLOR"]+""");
      e.Item.Attributes.Add( "onmouseover","this.style.backgroundColor=""+ "#EFF3F7"+""");
      }
     }

    26.模板列

    <ASP:TEMPLATECOLUMN visible="False" sortexpression="demo" headertext="ID">
     <ITEMTEMPLATE>
     <ASP LABEL text='<%# DataBinder.Eval(Container.DataItem, "ArticleID")%>' runat="server" width="80%" id="lblColumn" />
     </ITEMTEMPLATE>
     </ASP:TEMPLATECOLUMN>
     <ASP:TEMPLATECOLUMN headertext="选中">
     <HEADERSTYLE wrap="False" horiz></HEADERSTYLE>
     <ITEMTEMPLATE>
     <ASP:CHECKBOX id="chkExport" runat="server" />
     </ITEMTEMPLATE>
     <EDITITEMTEMPLATE>
     <ASP:CHECKBOX id="chkExportON" runat="server" enabled="true" />
     </EDITITEMTEMPLATE>
     </ASP:TEMPLATECOLUMN>
    后台代码
    protected void CheckAll_CheckedChanged(object sender, System.EventArgs e)
     {
      //改变列的选定,实现全选或全不选。
       CheckBox chkExport ;
      if( CheckAll.Checked)
      {
      foreach(DataGridItem oDataGridItem in MyDataGrid.Items)
      {
      chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
      chkExport.Checked = true;
      }
      }
      else
      {
      foreach(DataGridItem oDataGridItem in MyDataGrid.Items)
      {
      chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
      chkExport.Checked = false;
      }
      }
     }

    27.数字格式化

    【<%#Container.DataItem("price")%>的结果是500.0000,怎样格式化为500.00?<%#Container.DataItem("price","{0:¥#,##0.00}")%>
     int i=123456;
     string s=i.ToString("###,###.00");

    28.日期格式化

      【aspx页面内:<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date")%>
      显示为: 2004-8-11 19:44:28
      我只想要:2004-8-11<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date","{0:yyyy-M-d}")%>
      应该如何改?
       【格式化日期】
       取出来,一般是object((DateTime)objectFromDB).ToString("yyyy-MM-dd");
      【日期的验证表达式】
       A.以下正确的输入格式: [2004-2-29], [2004-02-29 10:29:39 pm], [2004/12/31] 
     ^((d{2}(([02468][048])|([13579][26]))[-/s]?((((0?[13578])|(1[02]))[-/s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[-/s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[-/s]?((0?[1-9])|([1-2][0-9])))))|(d{2}(([02468][1235679])|([13579][01345789]))[-/s]?((((0?[13578])|(1[02]))[-/s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[-/s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[-/s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))(s(((0?[1-9])|(1[0-2])):([0-5][0-9])((s)|(:([0-5][0-9])s))([AM|PM|am|pm]{2,2})))?$
      B.以下正确的输入格式:[0001-12-31], [9999 09 30], [2002/03/03] 
     ^d{4}[-/s]?((((0[13578])|(1[02]))[-/s]?(([0-2][0-9])|(3[01])))|(((0[469])|(11))[-/s]?(([0-2][0-9])|(30)))|(02[-/s]?[0-2][0-9]))$ 
      【大小写转换】
    HttpUtility.HtmlEncode(string);
     HttpUtility.HtmlDecode(string)

    29.如何设定全局变量

    Global.asax中
      Application_Start()事件中
      添加Application[属性名] = xxx;
      就是你的全局变量

    30.怎样作到HyperLinkColumn生成的连接后,点击连接,打开新窗口?

    HyperLinkColumn有个属性Target,将器值设置成"_blank"即可.(Target="_blank")
      【ASPNETMENU】点击菜单项弹出新窗口
      在你的menuData.xml文件的菜单项中加入URLTarget="_blank",如:

    <?xml version="1.0" encoding="GB2312"?>
     <MenuData ImagesBaseURL="images/"> 
     <MenuGroup>
     <MenuItem Label="内参信息" URL="Infomation.aspx" >
     <MenuGroup ID="BBC">
     <MenuItem Label="公告信息" URL="Infomation.aspx" URLTarget="_blank" LeftIcon="file.gif"/>
     <MenuItem Label="编制信息简报" URL="NewInfo.aspx" LeftIcon="file.gif" />

    最好将你的aspnetmenu升级到1.2版

    31.读取DataGrid控件TextBox值

    foreach(DataGrid dgi in yourDataGrid.Items)
     {
      TextBox tb = (TextBox)dgi.FindControl("yourTextBoxId");
      tb.Text....
     }


    32. 在DataGrid中有3个模板列包含Textbox分别为 DG_ShuLiang (数量) DG_DanJian(单价) DG_JinE(金额)分别在5.6.7列,要求在录入数量及单价的时候自动算出金额即:数量*单价=金额还要求录入时限制为 数值型.我如何用客户端脚本实现这个功能?

     <asp:TemplateColumn HeaderText="数量"> 
     <ItemTemplate>
     <asp:TextBox id="ShuLiang" runat='server' Text='<%# DataBinder.Eval(Container.DataItem,"DG_ShuLiang")%>' 
     />
     <asp:RegularExpressionValidator id="revS" runat="server" C ErrorMessage="must be integer" Validati />
     </ItemTemplate>
     </asp:TemplateColumn>
     <asp:TemplateColumn HeaderText="单价"> 
     <ItemTemplate>
     <asp:TextBox id="DanJian" runat='server' Text='<%# DataBinder.Eval(Container.DataItem,"DG_DanJian")%>' 
     />
     <asp:RegularExpressionValidator id="revS2" runat="server" C ErrorMessage="must be numeric" Validati />
     </ItemTemplate>
     </asp:TemplateColumn>
     <asp:TemplateColumn HeaderText="金额"> 
     <ItemTemplate>
     <asp:TextBox id="JinE" runat='server' Text='<%# DataBinder.Eval(Container.DataItem,"DG_JinE")%>' />
     </ItemTemplate>
     </asp:TemplateColumn><script language="javascript">
     function DoCal()
     {
      var e = event.srcElement;
      var row = e.parentNode.parentNode;
      var txts = row.all.tags("INPUT");
      if (!txts.length || txts.length < 3)
      return;
      var q = txts[txts.length-3].value;
      var p = txts[txts.length-2].value;
      if (isNaN(q) || isNaN(p))
      return;
      q = parseInt(q);
      p = parseFloat(p);
      txts[txts.length-1].value = (q * p).toFixed(2);
     }
     </script>

    34.datagrid选定比较底下的行时,为什么总是刷新一下,然后就滚动到了最上面,刚才选定的行因屏幕的关系就看不到了。

    page_load 
    page.smartNavigation=true;


    在网上碰巧看到的:http://blog.csdn.net/xb12369/article/details/7719026

    设置快捷键

    txtPwd.Attributes.Add("onkeydown", "if(event.which || event.keyCode){if ((event.which == 13) || (event.keyCode == 13)) {document.getElementById('" + loginbtn.ID + "').click();return false;}} else {return true}; ");

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  • 原文地址:https://www.cnblogs.com/zhang271123288/p/3997870.html
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