验证GridView控件编辑列的值

前台代码:

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

<!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>
 <style type="text/css">
  .td
  {
   border-bottom:dotted 1px #dcdcdc;
   border-right:dotted 1px #dcdcdc;
  }
 </style>
</head>
<body>
 <form id="form1" runat="server">
 <div>
  <table style="border:solid 1px green;width:40%">
   <tr>
    <td style="background-color:Green"><strong><span style="font-size: 14pt; color: #ffffff">验证GridView控件中编辑列的值</span></strong>
    </td>
   </tr>
   <tr>
    <td>
     <asp:GridView Width="100%" ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowDataBound="GridView1_RowDataBound" OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating" DataKeyNames="ProductID">
       <Columns>
        <asp:BoundField DataField="ProductName" ReadOnly="True" HeaderText="商品名称"/>
        <asp:TemplateField>
         <HeaderTemplate>
          <table width="100%">
           <tr>
             <td align="left" width="60%" >数量</td>
           </tr>
          </table>
         </HeaderTemplate>
         <ItemTemplate>
          <table width="100%">
           <tr>
            <td width="20%"><%# Eval("UnitsInStock")%></td>
           </tr>
          </table>
         </ItemTemplate>
         <EditItemTemplate>
          <table>
           <tr>
            <td width="20%"><asp:TextBox runat="Server" ID="t1" Text='<%# Eval("UnitsInStock")%>' Width="90%"></asp:TextBox></td>
           </tr>
          </table>
         </EditItemTemplate>
         </asp:TemplateField>
        <asp:CommandField ShowEditButton="True" HeaderText="操作" />
       </Columns>
       <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
       <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
       <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" />
      </asp:GridView>
     </td>
   </tr>
  </table> 

  </div>
 </form>
</body>
</html>


codebehind:

using System;
using System.Data;
using System.Configuration;
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 _Default : System.Web.UI.Page
{
 protected void Page_Load(object sender, EventArgs e)
 {
  if (!Page.IsPostBack)
  {
   band();
  }
 }
 private void band()
 {
  SqlConnection con=new SqlConnection(ConfigurationManager.ConnectionStrings["val"].ConnectionString);
  con.Open();
  SqlDataAdapter sda = new SqlDataAdapter("select top 5 ProductID, ProductName, UnitsInStock from products", con);
  DataSet ds = new DataSet();
  sda.Fill(ds);
  this.GridView1.DataSource = ds;
   this.GridView1.DataBind();
  con.Close();
 }
 protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
 {
  this.GridView1.EditIndex = e.NewEditIndex;
   band();
 }
 protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
 {
  this.GridView1.EditIndex = -1;
  band();
 }
 protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
 {
  SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["val"].ConnectionString);
  con.Open();
  string aa = this.GridView1.DataKeys[e.RowIndex].Value.ToString();
  string bb = ((TextBox)this.GridView1.Rows[e.RowIndex].Cells[0].FindControl("t1")).Text.ToString();
  string cc = "update products set UnitsInStock='" + bb + "' where ProductID='" + aa +"'";
  SqlCommand cmd = new SqlCommand(cc, con);
   cmd.ExecuteNonQuery();
  con.Close();
   this.GridView1.EditIndex = -1;
  band();
   Response.Write("<script>alert('更新成功!')</script>");
 }
 protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
 {
   if ((e.Row.RowState & DataControlRowState.Edit)==DataControlRowState.Edit)
  {
   RequiredFieldValidator re = new RequiredFieldValidator();
   re.ControlToValidate = "t1";
   re.ErrorMessage = "销售量不能为空";
   re.Display = ValidatorDisplay.Dynamic;
   re.Text = "*";
   e.Row.Cells[1].Controls.Add(re);
   RangeValidator ra = new RangeValidator();
   ra.ControlToValidate = "t1";
   ra.Type = ValidationDataType.Integer;
   ra.Display = ValidatorDisplay.Dynamic;
   ra.MaximumValue = "200";
   ra.MinimumValue = "10";
    ra.Text = "*";
   ra.ErrorMessage = "销售量的范围为10-200";
    e.Row.Cells[1].Controls.Add(ra);
   ValidationSummary va = new ValidationSummary();
   va.ShowSummary = false;
   va.ShowMessageBox = true;
   e.Row.Cells[1].Controls.Add(va);
  }
 }
}