Datagrid| News | templates
The example is simpler, the direct code is pasted, the example achieves the following function:
(1) Two DataGrid nesting
(2) outside a DataGrid paging
(3) inside a DataGrid dynamically adding template columns
<%@ Page language= "C #" codebehind= "WebForm45.aspx.cs" autoeventwireup= "false" inherits= "CSDN2. WebForm45 "%>
<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 transitional//en" >
<HTML>
<HEAD>
<title>Test</title>
<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>
<form id= "Form1" method= "POST" runat= "Server" >
<asp:datagrid id= "DATAGRID1" runat= "Server" autogeneratecolumns= "False" pagesize= "2" allowpaging= "True" >
<Columns>
<asp:templatecolumn headertext= "category name" >
<ItemTemplate>
<%# DataBinder.Eval (Container.DataItem, "classname")%>
<asp:datagrid id= "DataGrid2" runat= "Server" autogeneratecolumns= "false" ></asp:DataGrid>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:datagrid></form>
</body>
</HTML>
Using System;
Using System.Collections;
Using System.ComponentModel;
Using System.Data;
Using System.Data.SqlClient;
Using System.Drawing;
Using System.Web;
Using System.Web.SessionState;
Using System.Web.UI;
Using System.Web.UI.WebControls;
Using System.Web.UI.HtmlControls;
Namespace CSDN2
{
/**////<summary>
Summary description of the WEBFORM45.
</summary>
public class WebForm45:System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid DataGrid1;
private void Page_Load (object sender, System.EventArgs e)
{
Place user code here to initialize page
if (! IsPostBack)
{
Setbind ();
}
}
private void Setbind ()
{
SqlConnection conn=new SqlConnection (system.configuration.configurationsettings.appsettings["Conn"));
SqlDataAdapter Da=new SqlDataAdapter ("select * FROM Class;select * to topic", conn);
DataSet ds=new DataSet ();
Da. Fill (DS);
Ds. Relations.Add ("Class_topic", ds. Tables[0]. columns["ClassID"],ds. TABLES[1]. columns["Topicclassid"]);
This. Datagrid1.datasource=ds. Tables[0];
This. Datagrid1.databind ();
}
Web Forms Designer generated Code #region Web Forms Designer generated code
Override protected void OnInit (EventArgs e)
{
//
CodeGen: This call is required for the ASP.net Web forms Designer.
//
InitializeComponent ();
Base. OnInit (e);
}
/**////<summary>
Designer supports required methods-do not use the Code editor to modify
The contents of this method.
</summary>
private void InitializeComponent ()
{
This. Datagrid1.pageindexchanged + = new System.Web.UI.WebControls.DataGridPageChangedEventHandler (this. datagrid1_pageindexchanged);
This. Datagrid1.itemdatabound + = new System.Web.UI.WebControls.DataGridItemEventHandler (this. Datagrid1_itemdatabound);
This. Load + = new System.EventHandler (this. Page_Load);
}
#endregion
private void Datagrid1_itemdatabound (object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
if (e.item.itemtype==listitemtype.item| | E.item.itemtype==listitemtype.alternatingitem)
{
DataGrid dgrd= (DataGrid) E.item.findcontrol ("DataGrid2");
Dgrd. ItemDataBound + = new System.Web.UI.WebControls.DataGridItemEventHandler (this. Datagrid2_itemdatabound);
TemplateColumn tm=new TemplateColumn ();
Tm. Itemtemplate=new columntemplate ();
Tm. headertext= "topic name";
Dgrd. Columns.Add (tm);
Dgrd. Datasource= ((DataRowView) e.item.dataitem). Row.getchildrows ("Class_topic");
Dgrd. DataBind ();
}
}
private void Datagrid1_pageindexchanged (object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
{
This. Datagrid1.currentpageindex=e.newpageindex;
Setbind ();
}
private void Datagrid2_itemdatabound (object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
if (e.item.itemtype==listitemtype.item| | E.item.itemtype==listitemtype.alternatingitem)
{
((Label) E.item.findcontrol ("Topicname")). Text=convert.tostring (DataBinder.Eval (e.Item.DataItem, "[\" Topicname\ "]));
}
}
}
public class Columntemplate:itemplate
{
public void InstantiateIn (Control container)
{
Label L=new label ();
L.id= "Topicname";
Container. Controls.Add (l);
}
}
}
