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DataList里套DataGrid，DataBind

發(fā)表時(shí)間：2024-02-08 來源：明輝站整理相關(guān)軟件相關(guān)文章人氣：

[摘要]完整的例子：◆MyGrid.ascx:<%@ Control Language="c#" AutoEventWireup="false" Codebehind="MyGrid.ascx.cs" Inherits="XsSt...
完整的例子：
◆MyGrid.ascx:
<%@ Control Language="c#" AutoEventWireup="false" Codebehind="MyGrid.ascx.cs" Inherits="XsStudio.test.MyGrid" TargetSchema="http://schemas.microsoft.com/intellisense/ie5"%>
<asp:DataGrid id="DataGrid1" runat="server" ShowHeader="False" AllowPaging="True" PageSize="3"></asp:DataGrid>

◆MyGrid.ascx.cs
namespace test
{
using System;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

/// <summary>
///  MyGrid 的摘要說明。
/// </summary>
public class MyGrid : System.Web.UI.UserControl
{
  protected System.Web.UI.WebControls.DataGrid DataGrid1;

  private void Page_Load(object sender, System.EventArgs e)
  {
   // 在此處放置用戶代碼以初始化頁面
  }

  public void loaddata(string id)
  {
   DataTable dt = new DataTable();
   dt.Columns.Add("SN");
   dt.Columns[0].AutoIncrementSeed=1;
   dt.Columns[0].AutoIncrement = true;
   dt.Columns.Add("AAA");
   dt.Columns.Add("BBB");
   dt.Columns.Add("CCC");
   dt.Rows.Add(new string[]{"1",id,"435689",System.DateTime.Now.ToString()});
   dt.Rows.Add(new string[]{"2",id,"34535",System.DateTime.Now.ToString()});
   dt.Rows.Add(new string[]{"3",id,"4456",System.DateTime.Now.ToString()});
   dt.Rows.Add(new string[]{"4",id,"64563",System.DateTime.Now.ToString()});
   dt.Rows.Add(new string[]{"5",id,"84535",System.DateTime.Now.ToString()});
   this.DataGrid1.DataSource = dt;
   this.DataGrid1.DataBind();
   ViewState[this.ClientID+"_id"] = id;
  }

  private void DataGrid1_PageIndexChanged(object source, DataGridPageChangedEventArgs e)
  {
   this.DataGrid1.CurrentPageIndex = e.NewPageIndex;
   loaddata(ViewState[this.ClientID+"_id"].ToString());
  }

  #region Web 窗體設(shè)計(jì)器生成的代碼
  override protected void OnInit(EventArgs e)
  {
   //
   // CODEGEN: 該調(diào)用是 ASP.NET Web 窗體設(shè)計(jì)器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
  }
 
  /// <summary>
  ///  設(shè)計(jì)器支持所需的方法 - 不要使用代碼編輯器
  ///  修改此方法的內(nèi)容。
  /// </summary>
  private void InitializeComponent()
  {
   this.Load += new System.EventHandler(this.Page_Load);
   this.DataGrid1.PageIndexChanged+=new DataGridPageChangedEventHandler(DataGrid1_PageIndexChanged);
  }
  #endregion


}
}

◆webform1.aspx:
<%@ Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false" Inherits="XsStudio.test.WebForm1" validateRequest=false%>
<%@ Register TagPrefix="uc1" TagName="MyGrid" Src="MyGrid.ascx" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
  <title>WebForm1</title>
  <META http-equiv="Content-Type" content="text/html; charset=gb2312">
  <meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
  <meta content="C#" name="CODE_LANGUAGE">
  <meta content="JavaScript" name="vs_defaultClientScript">
  <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<body bgColor="#cccccc" MS_POSITIONING="GridLayout">
  <form id="Form1" method="post" runat="server">
   <asp:DataList id="DataList1" style="Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 8px" runat="server">
    <ItemTemplate>
     <asp:TextBox id="TextBox1" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "ID") %>'></asp:TextBox>
     <asp:TextBox id="Textbox2" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "smallPicPath") %>'></asp:TextBox>
     <uc1:MyGrid id="MyGrid1" runat="server"></uc1:MyGrid><br/>
    </ItemTemplate>
   </asp:DataList>
  </form>
  <script language="javascript">
 
  </script>
</body>
</HTML>

◆webform1.aspx.cs:

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using Microsoft.Web.UI.WebControls;
using System.Data.OleDb;

namespace XsStudio.test
{

public class WebForm1 : System.Web.UI.Page
{
  protected System.Web.UI.HtmlControls.HtmlInputText Text1;
  protected System.Web.UI.WebControls.DataList DataList1;
  protected System.Web.UI.WebControls.RadioButtonList RadioButtonList1;
 


 
  private void Page_Load(object sender, System.EventArgs e)
  {

   // 在此處放置用戶代碼以初始化頁面
   if(!IsPostBack)
   {
    DataTable tb = new DataTable();
    tb.Columns.Add("ID");
    tb.Columns.Add("smallPicPath");
    tb.Columns.Add("Remark");
    tb.Columns.Add("Name");
    tb.Columns.Add("SupportCount");
    tb.Columns.Add("gdzs");
    tb.Columns.Add("BrowserCount");
    tb.Rows.Add(new string[]{"001","dwef321","weaf","ewfa","1","12","ewf"});
    tb.Rows.Add(new string[]{"002","geawef","gaweg","43ga4","1","21","weg"});
    tb.Rows.Add(new string[]{"003","berg","gaweg","43ga4","1","21","weg"});
    tb.Rows.Add(new string[]{"004","54wh","gaweg","43ga4","1","21","weg"});
    tb.Rows.Add(new string[]{"005","baerg","gaweg","43ga4","1","21","weg"});
   
   
    DataList1.DataSource = tb;
    DataList1.DataBind();

   
   }
  
  }


[page_break]  private void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
  {
   if(e.Item.ItemIndex>-1)
   {
    string id = ((TextBox)e.Item.FindControl("TextBox1")).Text;
    MyGrid tmpGrid = (MyGrid)e.Item.FindControl("MyGrid1");
    tmpGrid.loaddata(id);
   }
  }

  #region Web 窗體設(shè)計(jì)器生成的代碼

  override protected void OnInit(EventArgs e)
  {
   //
   // CODEGEN: 該調(diào)用是 ASP.NET Web 窗體設(shè)計(jì)器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
  }
 
  /// <summary>
  /// 設(shè)計(jì)器支持所需的方法 - 不要使用代碼編輯器修改
  /// 此方法的內(nèi)容。
  /// </summary>
  private void InitializeComponent()
  {   
   this.Load += new System.EventHandler(this.Page_Load);
   this.DataList1.ItemDataBound+=new DataListItemEventHandler(DataList1_ItemDataBound);
  }
  #endregion
   }
}

這個(gè)是我自己搞的：
在aspx文件里，是這樣子套的

在cs文件中有這兩個(gè)方法的

private void Page_Load(object sender, System.EventArgs e)
{
  // 在此處放置用戶代碼以初始化頁面
  if(!IsPostBack)
  {
    //打開數(shù)據(jù)庫
    SqlConnection MyConnection=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["sqlconnectionstring"]);
    MyConnection.Open();
    //打開表
    string mysql;
    mysql="select tid,tna from new_type where iscatalog=0";
    SqlCommand MyCommand=new SqlCommand(mysql,MyConnection);
    SqlDataReader dr=MyCommand.ExecuteReader();
    //數(shù)據(jù)綁定
    DataList1.DataSource=dr;
    DataList1.DataBind();
    dr.Close();
    MyConnection.Close();
  }
}

 

private void DataList1_ItemDataBound(object sender, System.Web.UI.WebControls.DataListItemEventArgs e)
{
  //取tid
  string tid;
  //tid=e.Item.DataItem.GetType().ToString();
  tid=((DbDataRecord)e.Item.DataItem).GetValue(0).ToString();
  //Label mylabel=(Label)e.Item.FindControl("Label1");
  //mylabel.Text=tid;
  //綁定數(shù)據(jù)
  DataGrid mygrid=(DataGrid)e.Item.FindControl("DataGrid1");
  SqlConnection MyConnection=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["sqlconnectionstring"]);
  MyConnection.Open();
  string mysql;
  mysql="select top 10 cid,title from new_content where tid=" + tid;
  SqlCommand MyCommand=new SqlCommand(mysql,MyConnection);
  SqlDataReader dr=MyCommand.ExecuteReader();
  mygrid.DataSource=dr;
  mygrid.DataBind();
  dr.Close();
  MyConnection.Close();
}

補(bǔ)充一下下，要這個(gè)的：using System.Data.Common;

在這里我發(fā)現(xiàn)的是DataGrid1.Item.DataItem的類型是和一開始時(shí)綁定它的方法有關(guān)的，我用了SqlDataReader來綁定數(shù)據(jù)，DataGrid1.Item.DataItem的類型就是System.Data.Common.DbDataRecord。我換了用DataTable來綁定時(shí)，就和msdn里的一樣了，DataGrid1.Item.DataItem的類型是DbDataRecord

DataGrid的數(shù)據(jù)綁定可以用好多方法啊，嘛干會(huì)這樣子的呢？我想沒透的就是嘛干會(huì)用沒同的方法綁定數(shù)據(jù)，就會(huì)有沒同的類型呢？

DataGrid的數(shù)據(jù)綁定可以用好多方法啊，為什么會(huì)這樣呢？我想不通為什么用不同的方法綁定數(shù)據(jù)會(huì)有不同的類型呢？