App_Code/ASPNETAJAXWeb.cs

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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;

namespace ASPNETAJAXWeb.AjaxAlbum
{
	public class AjaxAlbumSystem
	{
		public const string TOTALPAGEINDEX = "TOTALPAGEINDEX";
		public const string CURRENTPAGEINDEX = "CURRENTPAGEINDEX";
		public const int MAXPHOTOCOUNT = 4;
		public static string[] ALLOWPHOTOFILELIST = new string[]{
			".bmp",
			".gif",
			".jpg",
			".mht",
			".png"
		};

		public AjaxAlbumSystem()
		{
			
		}

		/// <summary>
		/// 在ASP.NET环境中弹出一个对话框
		/// </summary>
		/// <param name="response"></param>
		/// <param name="message"></param>
		public static void ShowDialog(HttpResponse response,string message)
		{
			response.Write("<script>alert(\"" + message + "\");</script>");
		}

		/// <summary>
		/// 在ajax环境中弹出一个对话框
		/// </summary>
		/// <param name="button"></param>
		/// <param name="message"></param>
		public static void ShowAjaxDialog(Button button,string message)
		{
			ScriptManager.RegisterClientScriptBlock(button,typeof(Button),button.ClientID,message,true);
		}

		/// <summary>
		///  根据Value属性把列表控件的选择项设置为指定项
		/// </summary>
		/// <param name="list"></param>
		/// <param name="value"></param>
		public static void ListSelectedItemByValue(ListControl list,string value)
		{
			if(list == null) return;
			///选择项为空
			if(list.Items.Count <= 0)