Asp.net 在 Postback 之后执行 javascript 方法

ゝ一世哀愁。 2021-11-26 17:12 146阅读 0赞

主要介绍如下三种方式，分别表现在3个Button的Click事件中，代码如下：

前台：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="RunJSFunctionAfterPostBack.aspx.cs" Inherits="EricSunWebAppProject.RunJSFunctionAfterPostBack" %>
    
    <!DOCTYPE html>
    
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <title></title>
        <script src="Scripts/jquery-1.9.0.min.js"></script>
    </head>
    <body>
        <form id="form1" runat="server">
            <asp:ScriptManager ID="Scriptmanager1" runat="server" />
            <div>
                <asp:Button ID="Button1" runat="server" Text="Button1" OnClick="Button1_Click" />
                <asp:Button ID="Button2" runat="server" Text="Button2" OnClick="Button2_Click" />
                <asp:Button ID="Button3" runat="server" Text="Button3" OnClick="Button3_Click" />
            </div>
        </form>
    </body>
    </html>
    
    <script type="text/javascript">
        function AlertMyInfo() {
            alert("Hello Eric Sun.");
        }
    </script>

【注：要能够执行Button1中的Click方法，前台的<asp:ScriptManager ID="Scriptmanager1" runat="server" />必须加上。】

后台：

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    
    namespace EricSunWebAppProject
    {
        public partial class RunJSFunctionAfterPostBack : System.Web.UI.Page
        {
            protected void Page_Load(object sender, EventArgs e)
            {
    
            }
    
            protected void Button1_Click(object sender, EventArgs e)
            {
                string callbackJSFunction = "<script language='javascript'>function f(){AlertMyInfo(); Sys.Application.remove_load(f) ;}; Sys.Application.add_load (f);</script>";
                Page.ClientScript.RegisterStartupScript(this.GetType(), "HelloKey", callbackJSFunction); 
            }
    
            protected void Button2_Click(object sender, EventArgs e)
            {
                Response.Write("<script language=JavaScript> alert('Hello Eric Sun.'); </script>"); 
            }
    
            protected void Button3_Click(object sender, EventArgs e)
            {
                string s = "<script language=JavaScript>alert('Hello Eric Sun');</script>";
                Page.ClientScript.RegisterStartupScript(this.GetType(), "HelloKey", s); 
            }
        }
    }