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DataGrid validation, where is the error message?

Sep 10, 2014 at 10:27 AM
When using validation in DataGrid, the nice red message (that I provide via IDataErrorInfo interface) indicating an illegal input value of a cell almost never shows up. It actually shows up in a specific situation, where the illegal value is there initially when loading the data model. But it never shows when I am actually modifying the cells.

The red box around the cell is there, so I know the validation implementation works.

Any thoughts?

Thanks.
Dec 10, 2014 at 8:28 PM
Same issue here. I can't get any validations displaying from within a DataGrid.
Dec 13, 2014 at 11:10 AM
Most likely related to https://mui.codeplex.com/discussions/574682, which is about the GridView template in the ListView control.