一次编辑 GridView 的所有行

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。

<% @ Page Language="C#" AutoEventWireup="true" CodeFile="Default7.aspx.cs" Inherits="Default7"  %>

<! 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 >
             < 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 ="Persist Security Info=False;User ID=sa;Password=;Initial Catalog=Book;Server=."
                ProviderName ="System.Data.SqlClient"  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"   />
         </ div >
     </ form >
</ body >
</ html >

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  Default7 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    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("男").Selected = true;
                }
                else
                {
                    rbl.Items.FindByText("女").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 == "男" ? "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());
    }

}