[ASP.net]Loading制作

原文见【http://blog.csdn.net/bgu/archive/2005/01/21/263068.aspx】

方法很简单。把代码放上来大家看看！
打了包成了个控件。下载地址：
http://upserver4.ys168.com/ys168up/D1/YY1.aspx?f=050P1D8E0E3E5D9D5G6ALI7A00A05AKA03D6A00A08A08I5F9G0E0D9E0D8D6E1A24E6E1D9E5D9C3

下面是源码：

===================================

using System;

namespace HDControl
{
 /// <summary>
 /// Summary description for Loading.
 /// </summary>
 public class Loading
 {
  private System.Web.UI.Page Sender;
  private string strImagePath;

  public object Page
  {
   get
   {
    return Sender;
   }
   set
   {
    Sender = (System.Web.UI.Page)value;
   }
  }

  public string ImageMapth
  {
   get
   {
    return strImagePath;
   }
   set
   {
    strImagePath = value;
   }
  }

  public Loading()
  {
   //
  }

  public Loading( object sender )
  {
   Page = sender;
  }

  public Loading( object sender,string ImageMapth )
  {
   Page = sender;
   this.strImagePath = ImageMapth;
  }

  /// <summary>
  /// Load script to page
  /// </summary>
  public void Load()
  {
   if ( !this.Sender.IsClientScriptBlockRegistered( "startScript" ) )
   {
    this.Sender.RegisterClientScriptBlock( "startScript",this.Start() );
    this.Sender.RegisterStartupScript( "endScript",this.End() );
   }
  }

  /// <summary>
  /// Script start.
  /// </summary>
  /// <returns></returns>
  private string Start()
  {
   string strStyle = "BORDER-TOP-STYLE: none; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none; BORDER-BOTTOM-STYLE: none";
   System.Text.StringBuilder strScript = new System.Text.StringBuilder();
   strScript.Append( "<div id=\"loading\">" );
   strScript.Append( "<table width=\"100%\" height=\"100%\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\" style=\""+ strStyle + "\">" );
   strScript.Append( "<tr style=\"" + strStyle + "\" ><td width=\"100%\" height=\"100%\" align=\"center\" valign=\"middle\" style=\"" + strStyle + "\">" );
   strScript.Append( "<img src=\"" + this.ImageMapth + "\" border=\"0\">" );
   strScript.Append( "</td></tr>" );
   strScript.Append( "</table></div>" );
   return strScript.ToString();
  }

  /// <summary>
  /// Script end.
  /// </summary>
  /// <returns></returns>
  private string End()
  {
   System.Text.StringBuilder strScript = new System.Text.StringBuilder();
   strScript.Append( "<script language=\"javascript\">" );
   strScript.Append( "window.document.getElementById(\"loading\").style.display = \"none\";" );
   strScript.Append( "</script>" );
   return strScript.ToString();
  }
 }
}


=========================

先在面页中

using HDControl;

调用方法（在Page_Load里）：

LoadingControl.Loading objLoad = new LoadingControl.Loading( this,"Images/loading.gif" );
objLoad.Load();

或：

LoadingControl.Loading objLoad = new LoadingControl.Loading( );
objLoad.Page = this;
objLoad.ImageMapth = "Images/loading.gif";
objLoad.Load();