GridView控件修改、删除示例（修改含有DropDownList控件）

GridView控件修改、删除例子，修改时含有DropDownList控件。
示例运行效果图：

GridViewUp.aspx文件代码：

<% @ Page Language = " C# "  AutoEventWireup = " true "  CodeFile = " GridViewUp.aspx.cs "  Inherits = " gridview_GridViewUp "   %>

<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
< html  xmlns ="http://www.w3.org/1999/xhtml" >
< head  runat ="server" >
     < title > 无标题页 </ title >
</ head >
< body >
     < form  id ="form1"  runat ="server" >
         < div >
             < table  cellpadding ="0"  cellspacing ="0"  border ="0"  width ="80%"  style ="font-size: 11px" >
                 < tr >
                     < td  align ="center" >
                         < asp:GridView  ID ="GridView1"  runat ="server"  Width ="100%"  CellPadding ="4"  ForeColor ="#333333"
                            AutoGenerateColumns ="False"  AllowPaging ="True"  PageSize ="12"  OnRowCancelingEdit ="GridView1_RowCancelingEdit"
                            OnRowEditing ="GridView1_RowEditing"  OnRowUpdating ="GridView1_RowUpdating"  OnRowDeleting ="GridView1_RowDeleting"
                            DataKeyNames ="id,name"  OnPageIndexChanging ="GridView1_PageIndexChanging"  DataMember ="card,price"  OnRowDataBound ="GridView1_RowDataBound"  GridLines ="None" >
                             < Columns >
                                 < asp:BoundField  HeaderText ="编号"  DataField ="id"  ReadOnly ="True"   />
                                 < asp:BoundField  DataField ="name"  HeaderText ="姓名"  ReadOnly ="True"   />
                                 < asp:TemplateField  HeaderText ="身份证号" >
                                     < ItemTemplate >
                                         <% #  Eval ( " card " )  %>
                                     </ ItemTemplate >
                                     < EditItemTemplate >
                                         < asp:TextBox  ID ="TBCard"  Text ='<%#  Eval("card") % > ' runat="server" Width="140px" />
                                     </ EditItemTemplate >
                                     < ItemStyle  Width ="150px"   />
                                 </ asp:TemplateField >
                                 < asp:TemplateField  HeaderText ="学历" >
                                     < ItemTemplate >
                                         <% #  Eval ( " xueliText " ) %>
                                     </ ItemTemplate >
                                     < EditItemTemplate >
                                         < asp:HiddenField  ID ="HDFXueli"  runat ="server"  Value ='<%#  Eval("xueli") % > ' />
                                         < asp:DropDownList  ID ="DDLXueli"  runat ="server"  Width ="90px"   />
                                     </ EditItemTemplate >
                                     < ItemStyle  Width ="100px"   />
                                 </ asp:TemplateField >
                                 < asp:TemplateField  HeaderText ="价格" >
                                     < ItemTemplate >
                                         <% #  Eval ( " price " )  %>
                                     </ ItemTemplate >
                                     < EditItemTemplate >
                                         < asp:TextBox  ID ="TBPrice"  Text ='<%#  Eval("price") % > ' runat="server" Width="90px" />
                                     </ EditItemTemplate >
                                     < ItemStyle  Width ="100px"   />
                                 </ asp:TemplateField >
                                 < asp:BoundField  HeaderText ="建立时间"  DataField ="createdate"  ReadOnly ="True"   />
                                 < asp:CommandField  ShowDeleteButton ="True"  ShowEditButton ="True"  HeaderText ="操作"   />
                             </ Columns >
                             < PagerSettings  FirstPageText =""  LastPageText =""  NextPageText =""  PreviousPageText =""   />
                             < RowStyle  Height ="20px"  BackColor ="#F7F6F3"  ForeColor ="#333333"   />
                             < FooterStyle  BackColor ="#5D7B9D"  Font-Bold ="True"  ForeColor ="White"   />
                             < EditRowStyle  BackColor ="#999999"   />
                             < SelectedRowStyle  BackColor ="#E2DED6"  Font-Bold ="True"  ForeColor ="#333333"   />
                             < PagerStyle  BackColor ="#284775"  ForeColor ="White"  HorizontalAlign ="Center"   />
                             < HeaderStyle  BackColor ="#5D7B9D"  Font-Bold ="True"  ForeColor ="White"   />
                             < AlternatingRowStyle  BackColor ="White"  ForeColor ="#284775"   />
                         </ asp:GridView >
                     </ td >
                 </ tr >
             </ table >
         </ div >
     </ form >
</ body >
</ html >

GridViewUp.aspx.cs文件代码：

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;
using  System.Data.SqlClient;

public  partial  class  gridview_GridViewUp : System.Web.UI.Page
{
     protected   void  Page_Load( object  sender, EventArgs e)
    {
         if  ( ! IsPostBack)
        {
            GridViewBind();
        }
    }

     protected   void  GridView1_PageIndexChanging( object  sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex  =  e.NewPageIndex;
        GridViewBind();
    }

     private   void  GridViewBind()
    {
         string  connStr  =  ConfigurationManager.ConnectionStrings[ " ConnString " ].ConnectionString;
         string  SqlStr  =   " SELECT *, case xueli when '1' then '博士' when '2' then '硕士' when '3' then '学士 ' else '' end as xueliText FROM test01 where id<1000 and id>200 " ;
        DataSet ds  =   new  DataSet();

         try
        {
            SqlConnection conn  =   new  SqlConnection(connStr);
             if  (conn.State.ToString()  ==   " Closed " ) conn.Open();
            SqlDataAdapter da  =   new  SqlDataAdapter(SqlStr, conn);
            da.Fill(ds,  " test01 " );
             if  (conn.State.ToString()  ==   " Open " ) conn.Close();

            GridView1.DataSource  =  ds.Tables[ 0 ].DefaultView;
            GridView1.DataBind();
        }
         catch  (Exception ex)
        {
            Response.Write( " 数据库错误，错误原因： "   +  ex.Message);
            Response.End();
        }
    }

     protected   void  GridView1_RowDataBound( object  sender, GridViewRowEventArgs e)
    {
         if  (((DropDownList)e.Row.FindControl( " DDLXueli " ))  !=   null )
        {        
            DropDownList ddlxueli  =  (DropDownList)e.Row.FindControl( " DDLXueli " );

             //   生成 DropDownList 的值，也可以取得数据库中的数据绑定
            ddlxueli.Items.Clear();
            ddlxueli.Items.Add( new  ListItem( " 博士 " ,  " 1 " ));
            ddlxueli.Items.Add( new  ListItem( " 硕士 " ,  " 2 " ));
            ddlxueli.Items.Add( new  ListItem( " 学士 " ,  " 3 " ));
             //

             //   选中 DropDownList
            ddlxueli.SelectedValue  =  ((HiddenField)e.Row.FindControl( " HDFXueli " )).Value;
             //
        }
    }

     protected   void  GridView1_RowEditing( object  sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex  =  e.NewEditIndex;
        GridViewBind();
    }
     protected   void  GridView1_RowCancelingEdit( object  sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex  =   - 1 ;
        GridViewBind();
    }

     protected   void  GridView1_RowUpdating( object  sender, GridViewUpdateEventArgs e)
    {
         string  id  =  GridView1.DataKeys[e.RowIndex].Values[ 0 ].ToString();
         string  card  =  ((TextBox)GridView1.Rows[e.RowIndex].FindControl( " TBCard " )).Text;
         string  xueli  =  ((DropDownList)GridView1.Rows[e.RowIndex].FindControl( " DDLXueli " )).SelectedValue;
         string  price  =  ((TextBox)GridView1.Rows[e.RowIndex].FindControl( " TBPrice " )).Text;

         string  connStr  =  ConfigurationManager.ConnectionStrings[ " ConnString " ].ConnectionString;
         string  SqlStr  =   " update test01 set card=' "   +  card  +   " ',xueli=' "   +  xueli  +   " ',price=' "   +  price  +   " ' where id= "   +  id;

         try
        {
            SqlConnection conn  =   new  SqlConnection(connStr);
             if  (conn.State.ToString()  ==   " Closed " ) conn.Open();
            SqlCommand comm  =   new  SqlCommand(SqlStr, conn);
            comm.ExecuteNonQuery();
            comm.Dispose();
             if  (conn.State.ToString()  ==   " Open " ) conn.Close();

            GridView1.EditIndex  =   - 1 ;
            GridViewBind();
        }
         catch  (Exception ex)
        {
            Response.Write( " 数据库错误，错误原因： "   +  ex.Message);
            Response.End();
        }
    }

     protected   void  GridView1_RowDeleting( object  sender, GridViewDeleteEventArgs e)
    {
         string  id  =  GridView1.DataKeys[e.RowIndex].Values[ 0 ].ToString();
         string  connStr  =  ConfigurationManager.ConnectionStrings[ " ConnString " ].ConnectionString;
         string  SqlStr  =   " delete from test01 where id= "   +  id;

         try
        {
            SqlConnection conn  =   new  SqlConnection(connStr);
             if  (conn.State.ToString()  ==   " Closed " ) conn.Open();
            SqlCommand comm  =   new  SqlCommand(SqlStr, conn);
            comm.ExecuteNonQuery();
            comm.Dispose();
             if  (conn.State.ToString()  ==   " Open " ) conn.Close();

            GridView1.EditIndex  =   - 1 ;
            GridViewBind();
        }
         catch  (Exception ex)
        {
            Response.Write( " 数据库错误，错误原因： "   +  ex.Message);
            Response.End();
        }
    }
}

sql server2000生成表代码：

CREATE   TABLE   [ dbo ] . [ test01 ]  (
     [ id ]   [ decimal ] ( 18 ,  0 )  IDENTITY  ( 1 ,  1 )  NOT   NULL  ,
     [ name ]   [ varchar ]  ( 50 ) COLLATE Chinese_PRC_CI_AS  NULL  ,
     [ card ]   [ varchar ]  ( 50 ) COLLATE Chinese_PRC_CI_AS  NULL  ,
     [ xueli ]   [ varchar ]  ( 50 ) COLLATE Chinese_PRC_CI_AS  NULL  ,
     [ price ]   [ decimal ] ( 18 ,  0 )  NULL  ,
     [ createdate ]   [ datetime ]   NULL  
)  ON   [ PRIMARY ]
GO

ALTER   TABLE   [ dbo ] . [ test01 ]   ADD  
     CONSTRAINT   [ DF_test01_createdate ]   DEFAULT  ( getdate ())  FOR   [ createdate ] ,
     CONSTRAINT   [ PK_test01 ]   PRIMARY   KEY    CLUSTERED  
    (
         [ id ]
    )   ON   [ PRIMARY ]  
GO