<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %><!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 runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
</div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</form>
</body>
</html>下面是C#代码
public partial class Default2 : System.Web.UI.Page
{
bool flag = true;
protected void Page_Load(object sender, EventArgs e)
{ }
protected void Button1_Click(object sender, EventArgs e)
{
if (flag)
{
Label1.Visible = false;
flag = false;
}
else
{
Label1.Visible = true;
flag = true;
} }
}
看了半天也看不出来什么问题,现在点击隐藏后,再点击怎么也不显示出来
到底是什么问题撒
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
</div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</form>
</body>
</html>下面是C#代码
public partial class Default2 : System.Web.UI.Page
{
bool flag = true;
protected void Page_Load(object sender, EventArgs e)
{ }
protected void Button1_Click(object sender, EventArgs e)
{
if (flag)
{
Label1.Visible = false;
flag = false;
}
else
{
Label1.Visible = true;
flag = true;
} }
}
看了半天也看不出来什么问题,现在点击隐藏后,再点击怎么也不显示出来
到底是什么问题撒
在ASP。net 的页面中是不能随便定义一个 变量的
因为页面每次的刷新 都会使你定义的变量回复成初始化的值
我bool v = true就一直是true了
可以用viewstate来记录
{
if (Label1.Visible == false)
{
Label1.Visible = true;
}
else
{
Label1.Visible = false;
} }
public partial class Default2 : System.Web.UI.Page
{
bool flag = true;
protected void Page_Load(object sender, EventArgs e)
{ }
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Visible = !flag;
flag = !flag ;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Visible = !Label1.Visible;
}