为什么下面代码执行后没有什么效果<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>
</div>
<asp:Label ID="Label1" runat="server" Text="Label1"></asp:Label><br />
<asp:Label ID="Label2" runat="server" Text="Label2"></asp:Label><br />
<asp:Label ID="Label3" runat="server" Text="Label3"></asp:Label><br />
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
</form>
</body>
</html> protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
start();
}
public void start()
{
Thread th1 = new Thread(new ThreadStart(step1));
th1.Start();
Thread th2 = new Thread(new ThreadStart(step2));
th2.Start();
Thread th3 = new Thread(new ThreadStart(this.step3));
th3.Start();
} public void step1()
{
string s = "";
for (int i = 0; i < 10000000; i++)
{
s = i.ToString();
}
this.Label1.Text = "Lable1:" + s;
} public void step2()
{
string s = "";
for (int i = 0; i < 1000000; i++)
{
s = i.ToString();
}
this.Label2.Text = "Lable2:" + s;
} public void step3()
{
for (int i = 0; i < 100000; i++)
{
s = i.ToString();
}
this.Label3.Text = "Lable3:" + s;
}
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
<asp:Label ID="Label1" runat="server" Text="Label1"></asp:Label><br />
<asp:Label ID="Label2" runat="server" Text="Label2"></asp:Label><br />
<asp:Label ID="Label3" runat="server" Text="Label3"></asp:Label><br />
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
</form>
</body>
</html> protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
start();
}
public void start()
{
Thread th1 = new Thread(new ThreadStart(step1));
th1.Start();
Thread th2 = new Thread(new ThreadStart(step2));
th2.Start();
Thread th3 = new Thread(new ThreadStart(this.step3));
th3.Start();
} public void step1()
{
string s = "";
for (int i = 0; i < 10000000; i++)
{
s = i.ToString();
}
this.Label1.Text = "Lable1:" + s;
} public void step2()
{
string s = "";
for (int i = 0; i < 1000000; i++)
{
s = i.ToString();
}
this.Label2.Text = "Lable2:" + s;
} public void step3()
{
for (int i = 0; i < 100000; i++)
{
s = i.ToString();
}
this.Label3.Text = "Lable3:" + s;
}
看不到变化
{
if (!IsPostBack)
{
}
}是这样吗
这样用线程是没法控制前台控件的用AJAX 异步调用后台方法就行了