Asynchronous problem

  • Thread starter Thread starter bernardpace
  • Start date Start date
B

bernardpace

Hi,

I am having the following situation. The snippet of algorithm shown is
being executed on a new thread.

while (....)
{
.....
.....

myDataGrid.DataSource = myDataTable;
myDataGrid.Refresh();

// Here I need to update some windows components, mainly a datagrid
// Updating it directly from the thread is giving me an error, shown
below
}


Error given: "
An unhandled exception of type 'System.ArgumentException' occurred in
system.windows.forms.dll

Additional information: Controls created on one thread cannot be
parented to a control on a different thread.
"
From previous reads I made, this is happeining due to the fact that UI
Click to expand...
things should not be updated from workers thread but only from the UI
thread.

Now to solve the problem, I was thinking of make it asynchronously.


Can someone help me out to solve my problem.
Thanks in Advance
 
delegate void DoUpdate(DataTable tab);

while(...)
{
...
DoUpdate d = new DoUpdate(UpdateMethod);
myDataGrid.BeginInvoke(d, new object[]{myDataTable});
}

void UpdateMethod(DataTable tab)
{
myDataGrid.DataSource = myDataTable;
myDataGrid.Refresh();
}

If the loop needs to wait for the update to happen then use Invoke rather than BeginInvoke

Regards

Richard Blewett - DevelopMentor
http://www.dotnetconsult.co.uk/weblog
http://www.dotnetconsult.co.uk

Hi,

I am having the following situation. The snippet of algorithm shown is
being executed on a new thread.

while (....)
{
.....
.....

myDataGrid.DataSource = myDataTable;
myDataGrid.Refresh();

// Here I need to update some windows components, mainly a datagrid
// Updating it directly from the thread is giving me an error, shown
below
}


Error given: "
An unhandled exception of type 'System.ArgumentException' occurred in
system.windows.forms.dll

Additional information: Controls created on one thread cannot be
parented to a control on a different thread.
"
From previous reads I made, this is happeining due to the fact that UI
Click to expand...
things should not be updated from workers thread but only from the UI
thread.

Now to solve the problem, I was thinking of make it asynchronously.


Can someone help me out to solve my problem.
Thanks in Advance


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