利用SynchronizationContext跨线程访问

 

 1 private struct SynParam
 2         {
 3             public SynchronizationContext context;
 4             public PanelItem item;
 5             public string paramName;
 6             public object value;
 7             
 8         }
 9 
10 private void StartRoll()
11         {
12             flag = false;
13             clickFlag = false;
14             if (_Roll == null)
15             {
16                 _Roll = new Thread(new ParameterizedThreadStart(Roll));
17                 _Roll.Start(new SynParam() { context = SynchronizationContext.Current });
18             }
19             
20         }
21 
22 void Roll(object state)
23         {
24             
25                 SynParam pa = (SynParam)state;
26                 pa.context.Post(SetArguments,pa);
27           
28          }
29 
30  private void SetArguments(object param)
31         {
32             try
33             {
34                 SynParam pa = (SynParam)param;
35                 string argumentName = pa.paramName;
36                 object obj = pa.value;
37                 PanelItem item = pa.item;
38                 if (argumentName == "Location")
39                 {
40                     Point p = (Point)obj;
41                     item.Loc.X = p.X;
42                     item.Loc.Y = p.Y;
43                 }
44                 else if (argumentName == "Opacity")
45                 {
46                     item.Opacity = (double)obj;
47                 }
48                 else if (argumentName == "Scale")
49                 {
50                     item.Scale = (double)obj;
51                 }
52                 else if (argumentName == "ZIndex")
53                 {
54                     Canvas.SetZIndex(item, (int)obj);
55                 }
56             }
57             catch (Exception e)
58             {
59             }
60         }