ajax调用简便方法

 Ajax.dll，调用ajax很方便

1.配置文件web.config中增加配置

<httpHandlers>
            <add verb="POST,GET" path="ajax/*.ashx" type="Ajax.PageHandlerFactory, Ajax"/>
</httpHandlers>

2.page_load方法中增加注册

其中register为页面类名

Ajax.Utility.RegisterTypeForAjax(typeof(register));

3.cs文件中定义方法

    [Ajax.AjaxMethod]
    public bool CheckName(string username)
    {
        return loginUser.checkNameByUsed(username);
    }

4.前台页面中调用方法

 页面显示标签

<span id="check_info"></span>

 

      function CheckName() {
         var username = document.getElementById("regname").value.replace(/\s/g, '');
         if (username == "") {
            document.getElementById("check_info").innerHTML = "";
            return;
         }
         var checkResult = register.CheckName(username).value;
         if (checkResult) {
            document.getElementById("check_info").innerHTML = "<font color=\"red\">该用户名已经被注册，请重新选择用户名。</font>";
         }
         else {
            document.getElementById("check_info").innerHTML = "<font color=\"green\">恭喜您，该用户名还未被注册，您可以使用这个用户名注册！</font>";
         }
      }

 

 NOTE

1.[Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)]   读取session数据

2.[Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.ReadWrite)]
   HttpContext.Current.Session["Member"] = user;                     Ajax写入session值