GridView中实现DropDownList联动

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.