直接上代码,不做过多解释:

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
//如果是数据绑定行
if (e.Row.RowType == DataControlRowType.DataRow)
{
DropDownList ddlParent
= (DropDownList)e.Row.FindControl("ddlParent");
GetParent(ddlParent);
}
}


private void GetParent(DropDownList ddl)
{
string sql = "select * from Models where ParentModuleID=0";
DataTable dt
= DB.CreateDT(sql);
ddl.DataTextField
= "ModuleName";
ddl.DataValueField
= "ID";
ddl.DataSource
= dt;
ddl.DataBind();
}
protected void ddlParent_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow row
= (GridViewRow)((sender) as Control).NamingContainer;
DropDownList ddlParent
= (sender) as DropDownList;

int ddlParentID=Convert.ToInt32(ddlParent.SelectedValue);

DropDownList ddlChildren
= row.FindControl("ddlChildren") as DropDownList;
GetChildren(ddlChildren,ddlParentID);

}

private void GetChildren(DropDownList ddl, int parentID)
{
string sql = "select * from Models where ParentModuleID=" + parentID + "";
DataTable dt
= DB.CreateDT(sql);
ddl.DataTextField
= "ModuleName";
ddl.DataValueField
= "ID";
ddl.DataSource
= dt;
ddl.DataBind();
}
}

需要注意的是,其中的NamingContaier的使用方式.

posted on 2010-12-30 17:17  程序诗人  阅读(1438)  评论(0编辑  收藏  举报