c#中用axWebBrowser中提交表单，或点击某个对象

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test.htm

<form id="form1">
<INPUT language=javascript class=button id=Btton style="BORDER-TOP-STYLE: groove; BORDER-RIGHT-STYLE: groove; BORDER-LEFT-STYLE: groove; BORDER-BOTTOM-STYLE: groove" onclick="if (typeof(Page_ClientValidate) == 'function') Page_ClientValidate(); " type=submit value="Start" onclick="alert('dd')" name=Btton>
</form>

<input type="button" onclick="alert('test')" id="button1">

-----------------------------------------------------------------------------------
form1.cs

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using mshtml;

namespace WindowsApplication2
...{
/**//// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
...{
private AxSHDocVw.AxWebBrowser axWebBrowser1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
/**//// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;

public Form1()
...{
   //
   // Windows 窗体设计器支持所必需的
   //
   InitializeComponent();

   //
   // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
   //
}

/**//// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
...{
   if( disposing )
   ...{
    if (components != null)
    ...{
     components.Dispose();
    }
   }
   base.Dispose( disposing );
}

Windows 窗体设计器生成的代码

/**//// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
...{
   Application.Run(new Form1());
}

private void button1_Click(object sender, System.EventArgs e)
...{
   object x = System.Reflection.Missing.Value;
   axWebBrowser1.Navigate(@"E:/Documents and Settings/Administrator/桌面/test.htm", ref x, ref x, ref x, ref x);
}

private void button2_Click(object sender, System.EventArgs e)
...{
   mshtml.IHTMLDocument2 doc = (mshtml.IHTMLDocument2)axWebBrowser1.Document;
   mshtml.IHTMLFormElement f1 =(mshtml.IHTMLFormElement)doc.all.item ("form1",0);
   ((mshtml.IHTMLFormElement)(f1)).submit();
   mshtml.IHTMLElement Element = (mshtml.IHTMLElement)doc.all.item("button1", 0);
   Element.click();
}
}
}

附：如何模拟IE中的表单提交?
1. 如果使用的是WebBrowser控件：
   你可以访问整个HTML DOM，设置input value, 然后submit:
   mshtml.IHTMLDocument2 doc = (mshtml.IHTMLDocument2)webbrowser.Document;
   mshtml.IHTMLInputElement ele = (mshtml.IHTMLInputElement)doc.all.item("name", 0);
   ele.value = "user";
   ...
   mshtml.IHTMLFormElement ele = (mshtml.IHTMLFormElement)doc.all.item("myform", 0);
   ele.submit();

2. 如果没有使用WebBrowser，可以直接用WebRequest：
         WebRequest req = WebRequest.Create(url);
         req.Method = "POST";
         req.ContentType = "application/x-www-form-urlencoded";
         Stream stream = req.GetRequestStream();
         stream.Write(bytes, 0, bytes.Length);
         //bytes是byte[]形式的request字符串，如name=user&password=helloworld。