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public
partial
class
Form1 : Form
{
public
Form1()
{
InitializeComponent();
//方法1:不进行跨线程安全检查
//System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;
}
private
void
button1_Click(
object
sender, EventArgs e)
{
Thread th1 =
new
Thread(
new
ThreadStart(CalNum));
th1.Start();
}
private
void
CalNum()
{
//button1.Enabled = false;
int
result = 0;
for
(
int
i = 1; i < 100000000; i++)
{
result += i;
}
SetCalResult(result);
//button1.Enabled = true;
}
//方法2:检查是否跨线程,然后将方法加入委托,调用委托
public
delegate
void
SetTextHandler(
int
result);
private
void
SetCalResult(
int
result)
{
if
(label2.InvokeRequired ==
true
)
{
SetTextHandler
set
=
new
SetTextHandler(SetCalResult);
//委托的方法参数应和SetCalResult一致
label2.Invoke(
set
,
new
object
[] { result });
//此方法第二参数用于传入方法,代替形参result
}
else
{
label2.Text = result.ToString();
}
}
}
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