Hi Mark,

It seems you are missing 'ClearCahceDataSource' method. With this method, all the previous instance data cache should be removed. I made a simple sample but it did not represent all of your scenario. In fact, i used button instead of hyperlink to show WebDialogBox. Hope this helps.

Regards,
Handy

Hi Handy, thanks for the reply. I have modified your sample to illustrate what I am experiencing.

When the page loads please select an option from the drop down list and the web dialog box will open with the grid inside. Close the dialog box and then select a different option from the drop down list. The web dialog box will open again and before the correct table structure is applied to the grid you will see the previous structure and data that was in the grid. I need to be able to stop that from happening.

So, you wanted to avoid the previous stucture to be showed while it takes sometimes to refresh the new structure, correct?
It's true that the possible way to have the new structure is before dialog shows up.
The workaround is easy. Try to delay ShowDialog() method. 

e.g

function doChange(obj) {
            var grid = wgGetGridById("WebGrid1");
            var dlg = ISGetObject("WebDialogBox1");
            document.all["tableName"].value = obj.value;
            grid.RefreshAll();
            window.setTimeout(function() { dlg.ShowDialog(); }, 500);
        }  

Hope this helps. :-)

Regards,
Handy

Correct, however I want the dialog box to be shown before the grid is refreshed, so that the user can see that the grid is loading in case it takes some time to retrieve the data. Is this possible?

I think it is a little hard to find the perfect timing to do that. You only can choose between two conditions you knew.

Regards,
HAndy

Hi Handy, I have gone with the implementation of using a timeout to delay the ShowDialog() method. Although it is not exactly the functionality I wanted, it is pretty close. Thanks for your suggestions.