Question

I hava a Background Worker and a DataGrid in my c# Application. In do work of my Backgroundworker which will call an Api in my dlls which will enter some Data in a SQLite Database. After the Completion of my Api call I report a progress and In progress event of my Backgroundworker I get the contents from Db and assign it as a DataSource to my grid. I call same API in same backgroundworker. In the middle of processing my application crashes. But If I dont assign the dataSource in ProgressChanged my application doesnt crashes.

Answer 1

I am assuming you must be accessing UI object using Invoke method.

If not try using following approach (Executes the specified delegate, on the thread that owns the control’s underlying window handle, with the specified list of arguments.):

 //In Form.Designer.cs

 Label myLabel = new Label();


 //In code behind under Background worker method
 LabelVlaueSetter SetLabelTextDel = SetLabelText; 
 if (myLabel .InvokeRequired)
 {

   myLabel.Invoke(SetLabelTextDel, "Some Value");
 }

 private delegate void LabelVlaueSetter(string value);

 //Set method invoked by background thread
 private void SetLabelText(string value)
 {
   myLabel.Text = value;
 }