前台<body>中的代码：

<body>
    <div id="top"> </div>
        <form id="login" name="login" action="?Action=Login" method="post">
            <div id="center">
            <div id="center_left"></div>
            <div id="center_middle">
                <div class="user">
                    <label>用户名：
                        <input type="text" name="UserName" id="UserName" />
                    </label>
                </div>
                <br />
                <div class="user">
                    <label>密　码：
                        <input type="password" name="UserPassword" id="UserPassword" />
                    </label>
                </div>
            </div>
            <div id="center_middle_right"></div>
            <div id="center_submit">
                <div class="button"> <img alt="" id="loginin" src="images/dl.gif" width="57" height="20" onclick="document.login.submit()"/> </div>
                <div class="button"> <img alt="" id="loginreset" src="images/cz.gif" width="57" height="20" onclick="document.login.reset()"/> </div>
            </div>
            <div id="center_right"></div>
            </div>
        </form>
    <div id="footer"></div>
</body>

 

通过图片的点击事件，执行form.submit()传递form中的参数。

后台cs代码：

protected string Action = "";
   myBaseClass myData = new myBaseClass();
   protected class UserLoginInfo
   {
       public string UserName = "";
       public string UserPassword = "";
   }
   protected UserLoginInfo _UserLoginInfo = new UserLoginInfo();//创建对象
 
   protected void Page_Load(object sender, EventArgs e)
   {
       Init_WebControls();
   }
 
   public void Init_WebControls()
   {
       try
       {
           if (!string.IsNullOrEmpty(Request.QueryString["Action"]))//获取form的Action中的参数
           {
               Action = Request.QueryString["Action"].Trim().ToLower();//去掉空格并变小写
           }
           switch (Action)
           {
               case "login":
                   if (!string.IsNullOrEmpty(Request.Form["UserName"]) && !string.IsNullOrEmpty(Request.Form["UserPassWord"]))//获取form中的参数
                   {
                       _UserLoginInfo.UserName = Request.Form["UserName"].ToString();
                       _UserLoginInfo.UserPassword = Request.Form["UserPassWord"].ToString();
                       string user = "select 管理员名称,密码 from T_管理员表 where 管理员名称='" + _UserLoginInfo.UserName + "' and 密码='" + _UserLoginInfo.UserPassword + "'";
                       if (myData.readDataSet(user).Tables[0].Rows.Count == 1)
                       {
                           Response.Redirect("Main.aspx", false);//防止Response.End 方法终止页的执行
                       }
                       else
                       {
                           Response.Write("<Script Language=JavaScript>alert('密码或用户名错误，请重试！');</Script>");
 
                       }
                   }
                   break;
           }
       }
       catch (Exception ex)
       {
           throw new Exception(ex.Message);
       }
   }
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