Asp.net 中通过javascript调用后台函数
Asp.NET中，当服务器控件提交到服务器的时候，会调用__doPostBack(eventTarget, eventArgument)这个函数,当在页面中添加一个LinkButton的时候，在页面生成的html代码中可以看到__doPostBack函数的定义，第一个参数为服务器控件id，第二个参数是该控件所带的参数。
<script type="text/javascript"><!--var theForm = document.forms['form1'];if (!theForm) {theForm = document.form1;}function __doPostBack(eventTarget, eventArgument) {if (!theForm.onsubmit || (theForm.onsubmit() != false)) {theForm.__EVENTTARGET.value = eventTarget;theForm.__EVENTARGUMENT.value = eventArgument;theForm.submit();}}// --></script>
aspx页面主要代码如下：
<html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"><title>无标题页title><script type="text/javascript">function excute(){__doPostBack('LinkButton1','');}script>head><body><form id="form1" runat="server"><div><asp:TextBox ID="TextBox1" runat="server">asp:TextBox><input id="Button1" type="button" value="button" onclick="JavaScript:excute();"/><asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click">asp:LinkButton>div>form>body>html>
后台cs文件主要代码：
namespace Javascript调用cs{public partial class _Default : System.Web.UI.Page{protected void Page_Load(object sender, EventArgs e){}protected void LinkButton1_Click(object sender, EventArgs e){TextBox1.Text = "调用成功";}}}