Hello,

Normally, if a user enters invalid data into a cell, such as letters into a databound integer, then the grid correctly shows a 'Data Error unable to update the data value' dialog box. If this happens when the grid is in a nested ContainerControl then the message will keep re-appearing and in effect lock the application.

I have managed to track this issue down to using compositions of ContainerControl derived classes (i.e. UserControl). If grid is placed in a ContainerControl, which is then nested in a parent ContainerControl, then the issue occurs as can be seen in TestForm.cs in the attachment

To reproduce: The example shows 2 grids bound to integer lists. Type a letter into any cell in the first grid, then while still in edit mode try to select a cell from the second grid. The Data Error dialog should appear an infinite number of times

Replacing the ContainerControls with either a Panel or a Control resolves the issue within the same form, but not within multiple forms, as shown in TestFormMdi.cs in the attachment.

To reproduce: The example shows 2 forms containing a single grid in an MDI form. Type a letter into any cell in the first grid, then while still in edit mode try to select the other form. The Data Error dialog should appear between 2 and 5 times.

It appears that when the dialog box looses focus, the grid is getting focus again, then exiting edit mode again. I assume this is being indirectly caused by the ContainerControls focusing management.

Can you please investigate as I am unable to resolve the second issue.

Thanks

Steve