picturebox - Display WPF Image in backgroundworker -

i using wpf 3.5.

i have while loop in backgroundworker_dowork event, continuously stream images dslr.

initially, streamed image displayed in picturebox

<grid>     <windowsformshost verticalalignment="top" background="transparent" height="500">         <wf:picturebox x:name="picliveview" />     </windowsformshost> </grid> 

here code behind:

        while (!liveviewexit)         {             try             {                 if (picimage != null)                     lock (mylock)                     {                         this.picliveview.image = (image)picimage.clone();                     }             }             catch             {              }         } 

this works fine.

however, when try change picturebox wpf image control, have error when assigned bitmapimage wpf image control:

{"the calling thread cannot access object because different thread owns it."}

        memorystream ms = new memorystream();         bmp.save(ms, imageformat.png);         ms.position = 0;         bitmapimage bi = new bitmapimage();         bi.begininit();         bi.streamsource = ms;         bi.endinit();          try         {             if (bi != null)             {                 this.imagebox.source = bi;             }         }         catch         {          } 

why .net 2 picturebox control works while .net 3.5 wpf image control doesn't?

i tried code:

backgroundworker bg = new backgroundworker(); dispatcher disp = dispatcher.currentdispatcher; bg.dowork += (sender, e) => {     // load data     disp.invoke(new action(/* method or lambda assignment */)); } bg.runworkercompleted += anothermethodorlambda; // optional bg.runworkerasync(/*an argument object visible in e.argument*/); 

it doesn't have error, image doesn't refresh. while loop make application not responding.

you need instantiate dispatcher object in main thread, , use in background worker, calling it's invoke method.

here's sample of code:

backgroundworker bg = new backgroundworker(); dispatcher disp = dispatcher.currentdispatcher; bg.dowork += (sender, e) => {     // load data     disp.invoke(new action(/* method or lambda assignment */)); } bg.runworkercompleted += anothermethodorlambda; // optional bg.runworkerasync(/*an argument object visible in e.argument*/);