asp.net Form提交表单问题。报异常
总是报 未将对象引用设置到对象的实例，找不到错误 编译没问题。。帮我看看<%@ Page Language="C#" AutoEventWireup="true" CodeFile="onepage.aspx.cs" Inherits="onepage" ClassName="FirstPageClass" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>无标题页</title>
<script runat="server">
public string FirstName
{
get
{
return first.Text;
}
}
void ButtonClicked(object sender, EventArgs e)
{
Server.Transfer("twopage.aspx");
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="first" runat="server"></asp:TextBox>
<asp:Button ID="Button1" OnClick="ButtonClicked" Text="Go to second page" runat="server" />
</div>
</form>
</body>
</html>
=======================
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="twopage.aspx.cs" Inherits="twopage" %>
<%@ Reference Page="~/onepage.aspx" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>无标题页</title>
</head>
<script runat="server">
FirstPageClass fp;
void Page_Load()
{
fp = (FirstPageClass)Context.Handler;
}
</script>
<body>
<form id="form1" runat="server">
<div>
b.aspx页面输出：<%=fp.FirstName%>
</div>
</form>
</body>
</html>
--------------------编程问答-------------------- 应该是没初始化的问题吧 --------------------编程问答-------------------- fp = (FirstPageClass)Context.Handler;
fp 应该是null --------------------编程问答-------------------- 贴错误消息
--------------------编程问答--------------------
- -# 不就是个FORM提交么 你搞的这么尖端干吗啊。。。。SUBMIT之后第二页直接REQUEST不可以么？ --------------------编程问答--------------------
--------------------编程问答-------------------- 只有在第一加载的时候
if (!IsPostBack)
{
fp = (FirstPageClass)Context.Handler;
}
也就是
<asp:Button ID="Button1" OnClick="ButtonClicked" Text="Go to second page" runat="server" />
被点击的时候
Context.Handler 才是 FirstPageClass 的实例
补充：.NET技术 , ASP.NET
