在平时的实际项目中,为了减少往返提交数据,可以一次编辑 GridView 的所有行,这样大大提高用户使用产品的体验。下面就讲解何一次编辑 GridView 的所有数据行。在下面的例子中,数据库使用《ASP.NET 2.0应用开发技术》一书中Site\App_Data\下的 ASPNET20Book.mdb 数据库。例子中的数据更新方式使用 SqlDataSource 数据源控件的UpdateCommand属性,但此方法同样适用于存储过程,SQL 语句等。

C# 

<% @ Page Language = " C# "  Debug = " true "   %>
<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
< script  runat ="server" >
string[] ClassNameArray 
=  {  " 大学 " " 中学 " " 高中 "  };

// 初始化原来的值
protected  void  GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{    
  
if  (e.Row.RowType  ==  DataControlRowType.DataRow)
  {
    System.Data.DataRowView drv 
=  (System.Data.DataRowView)e.Row.DataItem;
    RadioButtonList rbl 
=  (RadioButtonList)e.Row.FindControl( " txtGender " );
    
if  (rbl  !=   null )
    {
      
if  ((bool)drv[ " Gender " ])
      {
        rbl.Items.FindByText(
" " ).Selected  =   true ;
      }
      
else
      {
        rbl.Items.FindByText(
" " ).Selected  =   true ;
      }
    }

    DropDownList ddl 
=  (DropDownList)e.Row.FindControl( " txtClassName " );
    
if  (ddl  !=   null )
    {
      ddl.Items.FindByText(drv[
" ClassName " ].ToString()).Selected  =   true ;
    }
  }
}

//  初始化项目列表
protected  void  GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{    
  
if  (e.Row.RowType  ==  DataControlRowType.DataRow)
  {
    DropDownList ddl 
=  (DropDownList)e.Row.FindControl( " txtClassName " );
    ddl.DataSource 
=  ClassNameArray;
    ddl.DataBind();
  }
}

// 处理提交的数据
protected  void  XianhuiMeng_Click(object sender, EventArgs e)
{
  foreach (GridViewRow gvr 
in  GridView1.Rows)
  {
    string tGender 
=  ((RadioButtonList)gvr.FindControl( " txtGender " )).SelectedValue;
    SqlDataSource1.UpdateParameters.Add(
new  Parameter( " @Title " , TypeCode.String, ((TextBox)gvr.FindControl( " txtTitle " )).Text));
    SqlDataSource1.UpdateParameters.Add(
new  Parameter( " @Gender " , TypeCode.Boolean, (tGender  ==   " "   ?   " True "  :  " False " )));
    SqlDataSource1.UpdateParameters.Add(
new  Parameter( " @ClassName "
                   TypeCode.String, ((DropDownList)gvr.FindControl(
" txtClassName " )).SelectedValue));
    SqlDataSource1.UpdateParameters.Add(
new  Parameter( " @id " , TypeCode.Int32, GridView1.DataKeys[gvr.DataItemIndex].Value.ToString()));
    SqlDataSource1.Update();
    SqlDataSource1.UpdateParameters.Clear();
  }
  Response.Redirect(Request.UrlReferrer.ToString());
}
</ script >

< html  xmlns ="http://www.w3.org/1999/xhtml" >
< head  id ="Head1"  runat ="server" >
< title > 同时编辑 GridView的 多行 </ title >
</ head >
< body >
< form  id ="form1"  runat ="server" >
  
< asp:GridView  ID ="GridView1"  runat ="server"  Font-Size ="12px"  CellPadding ="3"  AutoGenerateColumns ="False"
    DataKeyNames
="id"  DataSourceID ="SqlDataSource1"  OnRowDataBound ="GridView1_RowDataBound"
    OnRowCreated
="GridView1_RowCreated" >
    
< HeaderStyle  BackColor ="#EDEDED"   />
    
< Columns >
      
< asp:TemplateField  HeaderText ="姓名" >
        
< ItemTemplate >
          
< asp:TextBox  ID ="txtTitle"  runat ="server"  Text ='<%#Eval("Title")  % > '> </ asp:TextBox >
        
</ ItemTemplate >
      
</ asp:TemplateField >
      
< asp:TemplateField  HeaderText ="性别" >
        
< ItemTemplate >
          
< asp:RadioButtonList  ID ="txtGender"  runat ="server"  RepeatColumns ="2" >
            
< asp:ListItem  Text ='男' ></ asp:ListItem >
            
< asp:ListItem  Text ='女' ></ asp:ListItem >
          
</ asp:RadioButtonList >
        
</ ItemTemplate >
      
</ asp:TemplateField >
      
< asp:TemplateField  HeaderText ="学历" >
        
< ItemTemplate >
          
< asp:DropDownList  ID ="txtClassName"  runat ="server" >
          
</ asp:DropDownList >
        
</ ItemTemplate >
      
</ asp:TemplateField >
    
</ Columns >
  
</ asp:GridView >
  
< asp:SqlDataSource  ID ="SqlDataSource1"  runat ="server"  
    ConnectionString
="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|ASPNET20Book.mdb;Persist Security Info=True"
    ProviderName
="System.Data.OleDb"  SelectCommand ="SELECT * FROM [Student]"  
    UpdateCommand
="Update [Student] Set Title = @Title,Gender = @Gender,ClassName=@ClassName Where id=@id" >
  
</ asp:SqlDataSource >
  
< asp:Button  ID ="Button1"  runat ="server"  Text ="保存所有修改"  OnClick ="XianhuiMeng_Click"   />
</ form >
</ body >
</ html >

注意:对于SQL Server 数据库,参数名字不加@。另外注意:不同数据库类型和不同的数据源,UpdateCommand="Update [Student] Set Title = @Title,Gender = @Gender,ClassName=@ClassName Where id=@id"写法和SqlDataSource1.UpdateParameters.Add(new Parameter("@Title", TypeCode.String, ((TextBox)gvr.FindControl("txtTitle")).Text)); 的写法会有所区别。