新闻发布系统 —— 练习记录

公共类：

CommonClass.cs

public class CommonClass
{
    ///<summary>
    /// 连接数据库
    ///</summary>
    ///<returns>Sqlconnection对象</returns>
    public SqlConnection GetConnection()
    {
        string str = ConfigurationManager.AppSettings["Connection"].ToString();
        SqlConnection conn = new SqlConnection(str);
        return conn;
    }

    ///<summary>
    /// 在客户端弹出对话框
    ///</summary>
    ///<param name="TxtMessage">对话框显示的内容</param>
    ///<param name="Url">对话框关闭后跳转的URL</param>
    ///<returns></returns>
    public string MessageBox(string TxtMessage, string Url)
    {
        string str;
        str = "<script language=javascript>alert('" + TxtMessage + "');location='" + Url + "'</script>";
        return str;
    }

    ///<summary>
    ///执行sql 
    ///</summary>
    ///<param name="sqlStr">SQL字符串</param>
    ///<returns>操作是否成功(true/false)</returns>
    public Boolean ExecSQL(string sqlStr)
    {
        SqlConnection conn = GetConnection();
        conn.Open();
        SqlCommand cmd = new SqlCommand(sqlStr, conn);
        try
        {
            cmd.ExecuteNonQuery();
            conn.Close();
        }
        catch (Exception)
        {

            conn.Close();
            return false;
        }
        return true;
    }

    ///<summary>
    /// 返回数据源的数据集
    ///</summary>
    ///<param name="sqlStr"></param>
    ///<param name="TableName"></param>
    ///<returns>数据集DataSet</returns>
    public DataSet GetDataset(string sqlStr, string TableName)
    {
        SqlConnection conn = GetConnection();
        conn.Open();
        SqlDataAdapter adapter = new SqlDataAdapter(sqlStr, conn);
        DataSet ds = new DataSet();
        adapter.Fill(ds, TableName);
        conn.Close();
        return ds;
    }

    ///<summary>
    /// 防止SQL注入
    ///</summary>
    ///<param name="LoginName">登录名</param>
    ///<param name="loginPwd">登录密码</param>
    ///<returns></returns>
    public int check_Login(string loginName, string loginPwd)
    {
        SqlConnection conn = GetConnection();
        SqlCommand cmd = new SqlCommand("select count(*) from tb_User where Name=@loginName and PassWord=@loginPwd", conn);
        cmd.Parameters.Add(new SqlParameter("@loginName", SqlDbType.VarChar, 20));
        cmd.Parameters["@loginName"].Value = loginName;
        cmd.Parameters.Add(new SqlParameter("@loginPwd", SqlDbType.VarChar, 50));
        cmd.Parameters["@loginPwd"].Value = loginPwd;
        conn.Open();
        int i = (int)cmd.ExecuteScalar();
        cmd.Dispose();
        conn.Close();
        return i;
    }


    ///<summary>
    /// 实现随机验证码
    ///</summary>
    ///<param name="n">显示验证码的个数</param>
    ///<returns>返回生成的随机数</returns>
    public string RandomNum(int n)
    {
        //定义一个包括数字，大小写英文的字符串
        string strchar = "0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z";
        //将strchar字符串转化为数组
        //string.Split方法返回包含此实例的子字符串(由指定char数组的元素隔离)的string数组
        string[] vcArray = strchar.Split(',');
        string vNum = "";
        //记录上次随机数值，尽量避免几个一样的随机数
        int temp = -1;
        //采用一个简单的算法保证生成随机数不同
        Random rand = new Random();
        for (int i = 1; i < n + 1; i++)
        {
            if (temp != -1)
            {
                //unchecked 关键字用于取消整数运算和转换的溢出检查
                //DataTime.Ticks 属性火区表示此实例的日期和事件的刻度数
                rand = new Random(i * temp * unchecked((int)DateTime.Now.Ticks));
            }

            //Random.Next 方法返回一个小于所指定最大值的非负随机数
            int t = rand.Next(35);
            if (temp != -1 && temp == t)
            {
                return RandomNum(n);
            }
            temp = t;
            vNum += vcArray[t];

        }
        return vNum;//返回生成的随机数
    }
}

 

Add.aspx 添加信息

添加按钮

protected void btnAdd_Click(object sender, EventArgs e)

{

cc.ExecSQL("insert into tb_News(Title,Content,Style,Type,IssueDate) values ('" + this.txtNewsTitle.Text.Trim() + "','" + this.txtNewsContent.Text.Trim() + "','" + this.labTitle.Text.Trim() + "','" + this.ddlNewsType.SelectedIndex.ToString() + "','" + DateTime.Now.ToString("yyyy-MM-dd") + "')");

Response.Write(cc.MessageBox("添加成功!",""));

}
 

List.aspx 管理页面（搜索、删除）

public partial class Manager_list : System.Web.UI.Page

{

CommonClass cc = new CommonClass();

public static int InSearch;

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

//页面初始化时，指定IntSearch=0

InSearch = 0;

int n = Convert.ToInt32(Request.QueryString["id"]);

//指定新闻类别

this.dllNewsStyle.SelectedIndex = (n - 1);

this.bind();

}

}

public void bind()

{

this.gvNewsList.DataSource = cc.GetDataset("select * from tb_News where style='" + this.dllNewsStyle.SelectedValue.Trim() + "' order by id", "tbNews");

this.gvNewsList.DataKeyNames = new string[] { "id" };

this.gvNewsList.DataBind();

}

protected void btnSearch_Click(object sender, EventArgs e)

{

InSearch = 1;

this.searchBind();

}

public void searchBind()

{

//使用like定义字符串

string strSql = "select * from tb_News where style='" + this.dllNewsStyle.SelectedValue.ToString() + "'";

strSql += " and (content like '%" + this.txtKey.Text + "%')";

strSql += " or (Title like '%" + this.txtKey.Text + "%')";

strSql += " and style='" + this.dllNewsStyle.SelectedValue.ToString() + "'";

gvNewsList.DataSource = cc.GetDataset(strSql, "tbNews");

this.gvNewsList.DataKeyNames = new string[] { "id" };

gvNewsList.DataBind();

}

//实现 删除功能

protected void gvNewsList_RowDeleting(object sender, GridViewDeleteEventArgs e)

{

cc.ExecSQL("delete from tb_News where id='" + this.gvNewsList.DataKeys[e.RowIndex].Value.ToString() + "'");

if (InSearch == 1)

{

this.searchBind();

}

else

{

bind();

}

}

//删除 提示

protected void gvNewsList_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow)

{

e.Row.Cells[5].Attributes.Add("onclick", "return confirm('你确认要删除吗?')");

}

}

//实现 分页

protected void gvNewsList_PageIndexChanging(object sender, GridViewPageEventArgs e)

{

this.gvNewsList.PageIndex = e.NewPageIndex;

if (InSearch == 1)

{

this.searchBind();

}

else

{

bind();

}

}

}
 

Menu.aspx控件

前台搜索按钮

protected void Page_Load(object sender, EventArgs e)

{

this.labDate.Text = System.DateTime.Now.ToString("yyyy年MM月dd日") + "" + DateTime.Now.DayOfWeek.ToString();

}

protected void btnSearch_Click(object sender, EventArgs e)

{

Session["tool"] = "新闻 ——> 站内查询(" + this.ddlStyle.SelectedValue.Trim() + ")----输入的关键字为“" + this.txtKey.Text.Trim() + "”";

string strSql = "select * from tb_News where style='" + this.ddlStyle.SelectedValue.ToString() + "'";

//strSql += " and (content like '%" + this.txtKey.Text + "%')";

strSql += " and Title like '%" + this.txtKey.Text + "%'";

//strSql += " or issueDate='" + DateTime.Today.ToString() + "'";

Session["search"] = strSql;

Response.Redirect("search.aspx");

//Response.Write(Session["search"].ToString());

}
 

Newslist.aspx

新闻列表页

根据值 选择 前台显示

当前页码为：

[<asp:Label ID="labPage" runat="server" Text="1"></asp:Label>]&nbsp;&nbsp; 总页码为：[<asp:Label

ID="labBackPage" runat="server" Text=""></asp:Label>]

<br />

<asp:LinkButton ID="lnktnOne" runat="server" ForeColor="Red"

onclick="lnktnOne_Click">第一页</asp:LinkButton>

&nbsp;<asp:LinkButton ID="lnktnUp" runat="server" ForeColor="Red"

onclick="lnktnUp_Click">上一页</asp:LinkButton>

&nbsp;<asp:LinkButton ID="lnktnDown" runat="server" ForeColor="Red"

onclick="lnktnDown_Click">下一页</asp:LinkButton>

&nbsp;<asp:LinkButton ID="lnktnBack" runat="server" ForeColor="Red"

onclick="lnktnBack_Click">最后一页</asp:LinkButton>
 

 

Newslist.aspx.cs

DataList 分页

CommonClass cc = new CommonClass();

protected void Page_Load(object sender, EventArgs e)

{

bind();

}

string strStyle;

public void bind()

{

int n = Convert.ToInt32(Request.QueryString["id"]);

switch (n)

{

case 1: strStyle = "时政要闻";

this.Label1.Text = "新闻网络中心 —> 时政要闻";

this.imageLag.ImageUrl = "~/images/图片时政要闻.jpg";

break;

case 2: strStyle = "经济动向";

this.Label1.Text = "新闻网络中心 —> 经济动向";

break;

default:

break;

}

int curPage = int.Parse(this.labPage.Text);

PagedDataSource ps = new PagedDataSource();

DataSet ds = cc.GetDataset("select * from tb_News where style='" + strStyle + "' order by issueDate Desc", "tbNews");

ps.DataSource = ds.Tables["tbNews"].DefaultView;

//是否分页

ps.AllowPaging = true;

//分页数量

ps.PageSize = 12;

//取得当前页的页码

ps.CurrentPageIndex = curPage - 1;

this.lnktnBack.Enabled = true;

this.lnktnDown.Enabled = true;

this.lnktnOne.Enabled = true;

this.lnktnUp.Enabled = true;

if (curPage ==1)

{

//不显示第一页

this.lnktnOne.Enabled = false;

this.lnktnUp.Enabled = false;

}

if (curPage == ps.PageCount)

{

//不显示下一页

this.lnktnDown.Enabled = false;

this.lnktnBack.Enabled = false;

}

//显示分页数量

this.labBackPage.Text = Convert.ToString(ps.PageCount);

//绑定DataList

this.DataList1.DataSource = ps;

this.DataList1.DataKeyField = "id";

this.DataList1.DataBind();

}

protected void lnktnOne_Click(object sender, EventArgs e)

{

this.labPage.Text = "1";

this.bind();

}

protected void lnktnUp_Click(object sender, EventArgs e)

{

this.labPage.Text = Convert.ToString(Convert.ToInt32(this.labPage.Text) - 1);

this.bind();

}

protected void lnktnDown_Click(object sender, EventArgs e)

{

this.labPage.Text = Convert.ToString(Convert.ToInt32(this.labPage.Text) + 1);

this.bind();

}

protected void lnktnBack_Click(object sender, EventArgs e)

{

this.labPage.Text = this.labBackPage.Text;

this.bind();

}

protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)

{

int id = Convert.ToInt32(DataList1.DataKeys[e.Item.ItemIndex].ToString());

//Response.Write("<script lanuage=javascript>window.open('showNews.aspx?id=" + id + "','','width=520,height=250')</script>");

Server.Transfer("shownews.aspx?id='" + id + "'");
 

Shownews.aspx.cs

新闻内容页

CommonClass CC = new CommonClass();

protected void Page_Load(object sender, EventArgs e)

{

DataSet ds = CC.GetDataset("select * from tb_News", "tbNews");

DataRow[] row = ds.Tables["tbNews"].Select("id =" + Request.QueryString["id"] + "");

foreach (DataRow rs in row)

{

this.Page.Title = rs["title"].ToString();

this.labTitle.Text = rs["title"].ToString();

this.txtContent.Text = "" + rs["content"].ToString();

}

}

protected void btnClose_Click(object sender, EventArgs e)

{

Response.Write("<script language=javascript>window.close()</script>");

}
 

Search.aspx

//新闻列表的ID

//int id = Convert.ToInt32(dlNews.DataKeys[e.Item.ItemIndex].ToString());

CommonClass cc = new CommonClass();

protected void Page_Load(object sender, EventArgs e)

{

this.dlNews.DataSource = cc.GetDataset(Convert.ToString(Session["search"]), "tbNews");

this.dlNews.DataKeyField = "id";

this.dlNews.DataBind();

//显示查询条件

this.Label1.Text = Convert.ToString(Session["tool"]);

}

protected void dlNews_ItemCommand(object source, DataListCommandEventArgs e)

{

int id = Convert.ToInt32(dlNews.DataKeys[e.Item.ItemIndex].ToString());

Response.Write("<script language=javascript>window.open('shownews.aspx?id=" + id + "','','width=520,height=260')</script>");

}