JOJ
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this.Page.ClientScript.RegisterClientScriptBlock() 和this.Page.ClientScript.RegisterStartupScript()的区别

aspx页面:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="RegsterClientJs.aspx.cs" Inherits="Ajax.Study.RegsterClientJs" %>

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

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Register Client Script</title>
    <script type="text/javascript">
        function Test(nodeId) {
            document.getElementById(nodeId).style.display = "none";
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="tbName" runat="server" Text="name"></asp:TextBox>
        <asp:TextBox ID="tbAge" runat="server" Text="age"></asp:TextBox>
        <asp:Button ID="BtnTest" runat="server" Text="RegisterStartupScript 隐藏age输入框" onclick="BtnTest_Click" />
        <asp:Button ID="BtnTest2" runat="server" 
            Text="RegisterClientScriptBlock 隐藏age输入框" onclick="BtnTest2_Click"  />
    </div>
    </form>
</body>
</html>

后台代码:

       protected void Page_Load(object sender, EventArgs e)
       {
           
       }
       /// <summary>
       ///
使用RegisterStartupScript注册js脚本
      
/// </summary>
       /// <param name="sender"></param>
       /// <param name="e"></param>
      
protected void BtnTest_Click(object sender, EventArgs e)
       {
           //注册到 <form> 尾部 ,HTML元素已加载完毕
          
this.Page.ClientScript.RegisterStartupScript(this.GetType(), "age1", "Test('" + tbAge.ClientID + "');", true);
       }

      
       /// <summary>
       ///
使用RegisterClientScriptBlock注册js脚本
      
/// </summary>
       /// <param name="sender"></param>
       /// <param name="e"></param>
      
protected void BtnTest2_Click(object sender, EventArgs e)
       {
           //注册到<form> 头部 ,此时HTML还未加载!
           //js会报 缺少对象
          
this.Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "age2", "Test('" + tbAge.ClientID + "');", true);
       }

运行程序后,查看源文件就会看到他们的巨大差别!这里我就懒得贴图了!见谅。


另:如果你是用了ajax的UpdatePanel控件在试一试上面的代码呢?(把上面的div内容放在UpdatePanel里面)

<body>
    <form id="form1" runat="server">
    <asp:ScriptManager ID="sm" runat="server" />
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
    <div>
        <asp:TextBox ID="tbName" runat="server" Text="name"></asp:TextBox>
        <asp:TextBox ID="tbAge" runat="server" Text="age"></asp:TextBox>
        <asp:Button ID="BtnTest" runat="server" Text="RegisterStartupScript 隐藏age输入框" onclick="BtnTest_Click" />
        <asp:Button ID="BtnTest2" runat="server" 
            Text="RegisterClientScriptBlock 隐藏age输入框" onclick="BtnTest2_Click"  />
    </div>
     </ContentTemplate>
    </asp:UpdatePanel>
    </form>
</body>
  
后台代码:
/// <summary>
        /// 使用RegisterStartupScript注册js脚本
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void BtnTest_Click(object sender, EventArgs e)
        {
            //注册到 <form> 尾部 ,HTML元素已加载完毕
            //this.Page.ClientScript.RegisterStartupScript(this.GetType(), "age1", "Test('" + tbAge.ClientID + "');", true);

            //UpdatePanel 是用ajax后用上面的没有效果
            ScriptManager.RegisterStartupScript(this.UpdatePanel1, this.GetType(), "age1", "Test('" + tbAge.ClientID + "');", true);

        }
        /// <summary>
        /// 使用RegisterClientScriptBlock注册js脚本
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void BtnTest2_Click(object sender, EventArgs e)
        {
            //注册到<form> 头部 ,此时HTML还未加载!
            //js会报 缺少对象 
            
            //this.Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "age2", "Test('" + tbAge.ClientID + "');", true);

            //使用ajax的UpdatePanel 后
             //页面上的this.UpdatePanel1控件ID
            ScriptManager.RegisterClientScriptBlock(this.UpdatePanel1, typeof(Page), "key1", "Test('" + tbAge.ClientID + "');", true);
        }

 

效果实现了撒,而且没有刷新!好像使用了UpdatePanel1后RegisterClientScriptBlock也没有报错了!当然这个示例只是为了我学习RegisterStartupScript和RegisterClientScriptBlock的区别! 以上功能可以直接用客服端js就实现了没有必要再后台处理!

 

在此感谢我的同事:bobby!因为使用UpdatePanel 后注册js是他告诉我的!

posted on 2010-04-03 21:57  JoinJ  阅读(2823)  评论(0编辑  收藏  举报