.net 响应form请求

<form action="http://localhost:6069/index.aspx" method="post">
<input type="text" name="name" />
<input type="tel" name="tel"/>
<input type="text" name="age"/>
<input type="submit" text="提交" />
</form>

if (Request.Form["name"] != null && Request.Form["tel"] != null)
{
string name = Request.Form["name"];
string tel = Request.Form["tel"];

if (name.Length > 3 && tel.Length == 11)
{
Response.Write("OK");
}
else
{
Response.Write("姓名:" + name + "  手机:" + tel);
}
}