AjaxPro 操作Session

 

原文:http://blog.csdn.net/mathew3625/archive/2007/06/12/1648797.aspx

 

1 在web.config中的<system.web>节点中添加：

 

     < httpHandlers >
       < add verb = " POST,GET " path = " ajaxpro/*.ashx " type = " AjaxPro.AjaxHandlerFactory, AjaxPro " />
     </ httpHandlers >

2 后台代码(本来想直接写在页面上，后来想，还是保持住良好的习惯吧，我忍了)

         private void Page_Load( object sender, System.EventArgs e)
         {
                AjaxPro.Utility.RegisterTypeForAjax( typeof (WebForm1));
            }

            [AjaxPro.AjaxMethod()]
         public string TestMehtod( string name)
         {
             return this .BuildMessage(name);
            }

         protected string BuildMessage( string name)
         {
             return string .Format( " Hello {0}!Welcome to AjaxPro's world. " ,name);
            }

3 前台代码

<% @ Page language = " c# " Codebehind = " SampleBase.aspx.cs " AutoEventWireup = " false " Inherits = " AjaxProSample.WebForm1 " %>
<! DOCTYPE HTML PUBLIC " -//W3C//DTD HTML 4.0 Transitional//EN " >

< html >
   < head >
     < title > WebForm1 </ title >
     < meta name = " GENERATOR " Content = " Microsoft Visual Studio .NET 7.1 " >
     < meta name = " CODE_LANGUAGE " Content = " C# " >
     < meta name = vs_defaultClientScript content = " JavaScript " >
     < meta name = vs_targetSchema content = " http://schemas.microsoft.com/intellisense/ie5 " >
     < script language = " javascript " type = " text/javascript " >
        
            function TestFunction()
         {
                var serverMessage = AjaxProSample.WebForm1.TestMehtod( ' jxh ' );
             return serverMessage.value;
            }
        
     </ script >
   </ head >
   < body >
     < form id = " Form1 " method = " post " runat = " server " ></ form >
    
     < script language = " javascript " >
            document.write(TestFunction());        
     </ script >
    
   </ body >
</ html >

 

 

基本功能实现，下一步当然是更进一步的实践了。接着做的例子是个简单的登录操作，并将用户名和密码用Session记录下来。代码和上面的类似，就不贴了，占地方，呵呵。
但有2点需要注意
1 关于Session，如果想在AjaxMethod中使用Session的话，那么AjaxMethod标签必须带AjaxPro.HttpSessionStateRequirement.ReadWrite参数

 

[AjaxPro.AjaxMethod(AjaxPro.HttpSessionStateRequirement.ReadWrite)]
         public string CheckPassword()
         {}

 

2 关于属性，我们注册了一个属性，运行之后，在客户端JS中的确就可以访问了

 

            [AjaxPro.AjaxProperty()]
         public string UserName
         {
             set
             {
                    Session[ " UserName " ] = value;
                }

             get
             {
                 return Session[ " UserName " ].ToString();
                }
            }

 

 

AjaxProSample.SampleSession.UserName = document.getElementById( " txtUserName " ).value;

alert(AjaxProSample.SampleSession.UserName);

 

但此时如果在服务器端代码中企图使用的话，就会出现空引用异常，如果非要在客户段和服务器端同时使用这个属性的话，请增加一个设置值的方法。例如：

 

            [AjaxPro.AjaxMethod(AjaxPro.HttpSessionStateRequirement.ReadWrite)]
         public void SetValue( string value)
         {
                UserName = value;
            }

 

 

                AjaxProSample.SampleSession.UserName = document.getElementById( " TextBox1 " ).value;
                AjaxProSample.SampleSession.SetValue(AjaxProSample.SampleSession.UserName);