利用ASP.NET AJAX实现表格更新程序

今天看了一个网站http://aspadvice.com/blogs/azamsharp/archive/2007/06/28/Edit-GridView-Using-CheckBoxes.aspx，自己做了一个小程序，表格更新程序，主要功能为使用CheckBoxe允许编辑GridView行，并且能够保存修改的信息
具体程序如下：

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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

[System.Web.Services.WebMethod]

public static bool UpdateText(string categoryName, string description, string Id)

{

string conectionString = "Data Source=(local);Initial Catalog=Northwind;User ID=sa;Password=sa";

System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(conectionString);

conn.Open();

System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand("UPDATE Categories SET CategoryName = '" + categoryName + "', Description = '" + description + "' WHERE CategoryID = " + Id, conn);

cmd.ExecuteNonQuery();

conn.Close();

return true;

}

</script>

function disableGridViewTextBoxes()

{

var gvControl = document.getElementById("gvCategories");

var inputElements = gvControl.getElementsByTagName("INPUT");

for( i = 0;i < inputElements.length; i++)

{

if(isTextBox(inputElements[i]))

{

inputElements[i].disabled =<span style="COLOR: #000000; BACKGROUND-COLOR: %2