標籤：asp.net __dopostback
ASP.NET回傳資料是通過函數__doPostBack來實現的，該函數在添加了服務端控制項，並將AutoPostBack設定為true之後，將自動產生，具體可以參看下面的圖。所以在後台通過Request.Form來擷取所要的資料，test.aspx.cs代碼如下
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace ExampleTest{ public partial class test : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { String key = Request.Form["__EVENTTARGET"]; if (!String.IsNullOrWhiteSpace(key)) { String value = Request.Form["__EVENTARGUMENT"]; String info = "Key=" + key + " Value=" + value; Response.Write("<script type=\"text/javascript\">alert('" + info + "');</script>"); TextBox1.Text = info; } } }}
註：
對於Button和ImageButton會有不一樣，可以參考下面的文章
http://blog.csdn.net/luxuejuncarl/article/details/1479226
http://www.cnblogs.com/hjf1223/archive/2006/07/05/443761.html
附前端代碼
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="test.aspx.cs" Inherits="ExampleTest.test" %><!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <script type="text/javascript"> function test() { __doPostBack("AA", "111"); } </script></head><body> <form id="form1" runat="server"> <div> <input id="btnTest" type="button" onclick="test();" value="test" /> <asp:TextBox ID="TextBox1" runat="server" AutoPostBack="true"></asp:TextBox> </div> </form></body></html>
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