Can't Bind Datagrid with Dataset returned by WebService

[QuocSI]

Hi all,

I've wrote a Webservice which return a Dataset.

I have made an object on a client pc to acces this webservice.
The asynchhroned call to webservice fill correctly my dataset.

But when in my form, I wish to use this Dataset, I get error at runtime.

Datagrid1.datasource = MyObject.MyDataset

Do not provide error on compilation.


With an asynchroned call, does the system create a secondary thread.
The dataset seem not to be part of the principal thread.
So how can I bind then returned datas.

Thanks a lot for your help.

 

[Trebek]

It is possible that the callback is not on the Message pump thread. I would
suggest that you check and see by calling InvokeRequired. If so, simply
define a delegate and method that implements this delegate to bind the
datagrid and invoke it from the web service async callback.

EX in C# (Sorry -- never messed with VB):

//Delegate definition
public delegate void DelBindMyGrid(DataSet ds);

//In async callback
DataSet ds = ws.EndMethod(ir);
this.Invoke(new DelBindMyGrid(BindGrid),new object[]{ds});


//Delegate method to bind grid -- called thru invoke to run under msg
pump thread
private void BindGrid(DataSet ds)
{
Datagrid1.datasource = MyObject.MyDataset;
}

HTH,

Alex