解决WPF中button按钮同时点击多次触发click的方法,供大家参考,具体内容如下
1
2
3
4
5
6
7
8
9
10
11
12
13
DateTime lastClick = DateTime.Now;
object
obj =
new
object
();
int
i = 0;
private
void
Button_Click(
object
sender, RoutedEventArgs e)
{
this
.IsEnabled =
false
;
var t = (DateTime.Now - lastClick).TotalMilliseconds;
i++;
lastClick = DateTime.Now;
System.Diagnostics.Debug.Print(t +
","
+ i +
";"
+ DateTime.Now);
Thread.Sleep(2000);
this
.IsEnabled =
true
;
}
以上代码并没法解决用户点击两次按钮触发两次的问题,因为ui线程是单线程的,所以这个这样会导致用户连续点击两次,会两秒后又调用Button_Click一次,输出如下:
1207.069,1;2017年4月19日 13:58:22 2055.1176,2;2017年4月19日 13:58:24
所以要在this.IsEnabled = false;后面强制界面刷新,代码如下:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
private
void
Button_Click(
object
sender, RoutedEventArgs e)
{
this
.IsEnabled =
false
;
DispatcherHelper.DoEvents();
var t = (DateTime.Now - lastClick).TotalMilliseconds;
i++;
lastClick = DateTime.Now;
System.Diagnostics.Debug.Print(t +
","
+ i +
";"
+ DateTime.Now);
Thread.Sleep(2000);
this
.IsEnabled =
true
;
}
public
static
class
DispatcherHelper
{
[SecurityPermissionAttribute(SecurityAction.Demand, Flags = SecurityPermissionFlag.UnmanagedCode)]
public
static
void
DoEvents()
{
DispatcherFrame frame =
new
DispatcherFrame();
Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background,
new
DispatcherOperationCallback(ExitFrames), frame);
try
{ Dispatcher.PushFrame(frame); }
catch
(InvalidOperationException) { }
}
private
static
object
ExitFrames(
object
frame)
{
((DispatcherFrame)frame).Continue =
false
;
return
null
;
}
}
DispatcherHelper.DoEvents();这个方法会强制界面刷新,问题就解决了。