Cell validation (checking errors) before showing data in datagridview

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Hi guys,

Is there anyway which I can have cell validation after I click the load data button and before displaying data in datagridview??
I know I that I can have cell validation when editing in datagridview. However I want viewer's to first see the errors first and then edit.

Please, need for help.

What I have tried:

Import datalist from excel after clicking load button. cell validation when editing.

Posted 24-Jun-20 21:54pm

Member 14864160

Updated 24-Jun-20 22:02pm

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OriginalGriff · Answer 1 · 2020-06-24T22:02:00

Until you display the DGV, you can't show the user anything is a useful form. So you would need to either validate the datasource before you apply the data to the DGV - which isn't difficult, though "fixes" may be laborious depending on your data - or you could use the DGV to show "errors" in a different colour perhaps: Colouring DataGridView Cells According to their Content in WinForms[^] may help. he code is C#, but it's pretty obvious and you'd need to use your own validation anyway.