资料转载

【转】GridView动态添加模板列(并为其添加事件和自动绑定数据)

GridView动态添加模板列 这个case 经常会遇到,网上相关资料也不少, 
但是关于如何动态为添加在模板列中的控件添加事件却没有。本文就是为解决这种情况而写。 
代码如下: 
GridViewTemplateDemo.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="GridViewTemplateDemo.aspx.cs" Inherits="GridView_GridViewTemplateDemo" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<head id="Head1" runat="server">
 
<title>GridView动态添加模板列的例子</title>
 
</head>
 
<body>
 
<form id="form1" runat="server">
 
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
 
</asp:GridView>
 
</form>
 
</body>
 
</html>
 
 

GridViewTemplateDemo.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class GridView_GridViewTemplateDemo : System.Web.UI.Page
{
private DataTable getDateTable()
{
DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("ID", typeof(Int32)));
dt.Columns.Add(new DataColumn("Name", typeof(String)));
DataRow dr = dt.NewRow();
dr[0] = 1;
dr[1] = "01";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr[0] = 2;
dr[1] = "01011";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr[0] = 3;
dr[1] = "0120";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr[0] = 4;
dr[1] = "01001";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr[0] = 5;
dr[1] = "0105";
dt.Rows.Add(dr);
return dt;
}
 
protected override void OnInit(EventArgs e)
{
TemplateField customField = new TemplateField();
 
customField.ShowHeader = true;
customField.HeaderTemplate = new GridViewTemplate(DataControlRowType.Header, "动态添加列");
GridViewTemplate gvt = new GridViewTemplate(DataControlRowType.DataRow, "lbtn", "Name");
gvt.eh += new GridViewTemplate.EventHandler(lbtn_Click);
customField.ItemTemplate = gvt;
GridView1.Columns.Add(customField);
base.OnInit(e);
}
 
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
GridView1.DataSource = getDateTable();
GridView1.DataBind();
}
}
 
public void lbtn_Click(object sender, EventArgs e)
{
ClientScript.RegisterStartupScript(GetType(), "test", "alert('ok');", true);
}
}
 
public class GridViewTemplate : ITemplate
 
{
public delegate void EventHandler(object sender, EventArgs e);
public event EventHandler eh;
 
private DataControlRowType templateType;
 
private string columnName;
private string controlID;
 
 
 
public GridViewTemplate(DataControlRowType type, string colname)
 
{
 
templateType = type;
 
columnName = colname;
 
}
public GridViewTemplate(DataControlRowType type,string controlID, string colname)
{
templateType = type;
this.controlID = controlID;
columnName = colname;
}
 
 
public void InstantiateIn(System.Web.UI.Control container)
{
switch (templateType)
{
case DataControlRowType.Header:
Literal lc = new Literal();
lc.Text = columnName;
container.Controls.Add(lc);
break;
case DataControlRowType.DataRow:
LinkButton lbtn = new LinkButton();
lbtn.ID = this.controlID;
if (eh != null)
{
lbtn.Click += new System.EventHandler(eh);
}
lbtn.DataBinding+=new System.EventHandler(lbtn_DataBinding);
 
container.Controls.Add(lbtn);
 
break;
default:
break;
}
}
void lbtn_DataBinding(object sender, EventArgs e)
{
LinkButton lbtn = sender as LinkButton;
if (lbtn != null)
{
GridViewRow container = lbtn.NamingContainer as GridViewRow;
if (container != null)
{
object dataValue = DataBinder.Eval(container.DataItem, columnName);
if (dataValue != DBNull.Value)
{
lbtn.Text = dataValue.ToString();
}
}
}
}
 
}

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