Control 'richTextBox1' accessed from a thread other than the thread it was created on in c#

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hi friends. i'm retreiving data from the richTextBox

C#

. but i got above error.how can i solve this

Posted 21-Jan-16 21:09pm

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F-ES Sitecore 22-Jan-16 3:46am

Have you googled the error? Only the main GUI thread can access GUI controls. If you want code on a different thread to update a control you need to use the Invoke method to do so. Google the error you're have and you'll find lots of examples.

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lukeer · Answer 1 · 2016-01-21T22:04:00

Delegate the UI handling to the thread that created the UI object. That is usually the main thread, a.k.a. GUI thread.

C#

// Call this from whatever thread you like.
void SetTextBoxText(RichTextBox box, string text)
{
    // Accessing a GUI object from another thread than GUI is not permitted
    //   There are three exceptions to that: InvokeRequired, BeginInvoke, Invoke
    if (box.InvokeRequired)
    // Called from another thread than GUI thread.
    //   Delegate work to GUI thread and exit.
    {
        box.Invoke(new Action<string>(SetTextBoxText), new object[] { box, text });
        return;
    }
    // We're in GUI thread now. Accessing the GUI object is safe.
    box.Text = text;
}