StackOverflow2013

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PO
primarykey
Id
19173011
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
1
CommunityOwnedDate
CreationDate
2013-10-04T04:03:55.533
FavoriteCount
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2013-10-04T04:30:52.347
LastEditDate
2013-10-04T04:30:52.347
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323291
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323291
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19172874
PostTypeId
2
Score
0
ViewCount
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LastEditorDisplayName
text
Body
Any time you touch a control you must do so from the UI thread. You can do the actual downloading of the picture and other long-running tasks from your thread/task. From your thread you use Control.Invoke to invoke a delegate on the UI thread. This MSDN article has a good example of using Control.Invoke with simple variables like strings and such: <a href="http://msdn.microsoft.com/en-us/library/a1hetckb(v=vs.100).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/a1hetckb(v=vs.100).aspx</a> But often a helper class is used so you can pass more complex data between your delegates without resorting to big nasty object arrays. Here's some sample code I did up: <pre><code> private void button1_Click(object sender, EventArgs e) { Task.Factory.StartNew(() => { DataClass dataClass = new DataClass(this.textBox1); Thread.Sleep(5000); // simulate long running task dataClass.TextToPass = "set some text"; dataClass.updateTargetControl(); }); } private class DataClass { delegate void updateTextBoxOnUiThreadDelegate(); private TextBox _targetControl= null; private updateTextBoxOnUiThreadDelegate _updateDelegate; internal DataClass(TextBox targetControl) { _updateDelegate = new updateTextBoxOnUiThreadDelegate(updateOnUiThread); _targetControl = targetControl; } internal string TextToPass = ""; internal void updateTargetControl() { _targetControl.Invoke(_updateDelegate); } private void updateOnUiThread() { _targetControl.Text = this.TextToPass; } } </code></pre>
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1. POCreate control in thread and loading photo async
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1. POCreate control in thread and loading photo async
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