Styjun

I have a parent form that send a data table to a child form by Delegate.
the Delegate is executed and i have also gotten the the table on the child side.
i want to append a text into my richtextbox control to announce the user what is going on and then run a backgroundworker. but i get the STAThread Exception. i know some thing about Invoke(Delegate) and about single-Thread but i do not know how can i overcome to this cross-threading. Any help is appreciated.

The codes from Appent To RichTextBox are not execute with debugging (i know it is possible with run of the *.exe file).

//What i am doing and trying:(SetDaTableAndFileNameFn is my received Delegate)

 public void SetDaTableAndFileNameFn(System.Data.DataTable DataTable)
 
 //Test The Parent Has Sent And Child Has Received.
 MessageBox.Show("Ruger Parent...");
 dt.Clear();
 dt = DataTable;
 //Check whether My dt Filled Correctly.
 MessageBox.Show(dt.Rows[2][2].ToString());
 richTxtBxExprtr.AppendText(">>> Creating And Transferring Data To The File...");
 //BGWorker.
 bGWExprtrLod.WorkerReportsProgress = true;
 bGWExprtrLod.RunWorkerAsync();
 

 private void ExportToTxtIrrigularly(System.Data.DataTable DataTable)
 
 // Using Microsoft.Office.Interop.Word.Application to export datatable.
 

 private void xBtnExprt_Click(object sender, EventArgs e)
 
 SaveFileDialog svFDialXls = new SaveFileDialog();
 svFDialXls.Filter = "Plain text(*.txt)

 private void bGWExprtrLod_DoWork(object sender, DoWorkEventArgs e)
 
 this.Invoke(new Action(() =>
 
 richTxtBxExprtr.AppendText(">>> Start Processing...n>>> Copying Data Take A Little Time.n>>> Be Patient...n>>> Loadind Data...n-----------------------------------------------n");
 ExportToTxtIrrigularly(dt);
 ));
 

 private void bGWExprtrLod_ProgressChanged(object sender, ProgressChangedEventArgs e)
 
 this.Invoke(new Action(() =>richTxtBxExprtr.AppendText(">>> Line NO. [" + e.ProgressPercentage.ToString() + "] Is In Progress...n");
 richTxtBxExprtr.ScrollToCaret();
 ));
 

 private void bGWExprtrLod_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
 this.Invoke(new Action(() => richTxtBxExprtr.AppendText(">>> The Process Is Completed Successfuly.n"); ));
 

the executed mthod in the BGWorker will open a savedialogbox() and then export my datatable to a text format using

Microsoft.Office.Interop.Word.Application

Not really sure what kind of setup you've got, but it will look something like this:

private BackgroundWorker bGWExprtrLod;

private void Form1_Load(object sender, EventArgs e)

 bGWExprtrLod = new BackgroundWorker();
 bGWExprtrLod.WorkerReportsProgress = true;
 bGWExprtrLod.ProgressChanged += BGWExprtrLod_ProgressChanged;
 bGWExprtrLod.RunWorkerCompleted += BGWExprtrLod_RunWorkerCompleted;
 bGWExprtrLod.DoWork += BGWExprtrLod_DoWork;


public void SetDaTableAndFileNameFn(System.Data.DataTable DataTable)

 // ... other code ...
 bGWExprtrLod.RunWorkerAsync();


private void BGWExprtrLod_DoWork(object sender, DoWorkEventArgs e)

 bGWExprtrLod.ReportProgress(0, ">>> Creating And Transferring Data To The File...");
 // ... do some work ...

private void BGWExprtrLod_ProgressChanged(object sender, ProgressChangedEventArgs e)

 string msg = e.UserState.ToString();
 richTxtBxExprtr.AppendText(msg);


private void BGWExprtrLod_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)

 richTxtBxExprtr.AppendText("Transfer Complete!");

** EDIT **

Start by moving the call to you export method outside the Invoke() call:

private void bGWExprtrLod_DoWork(object sender, DoWorkEventArgs e)

 this.Invoke(new Action(() =>
 
 richTxtBxExprtr.AppendText(">>> Start Processing...n>>> Copying Data Take A Little Time.n>>> Be Patient...n>>> Loadind Data...n-----------------------------------------------n");
 ));
 ExportToTxtIrrigularly(dt);