【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

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();

}

}

}

}

 

}