C# .NET - how to validate grid cell on typing in cel of gridview win application

hi..i have datagridview and having 4 cells and i need to validate for each column seprately and on typing data  in datagridview cell...not on leaving event...any help??

For this you need to implement dataGridView1_CellValidating() event.

Follow this link-

http://social.msdn.microsoft.com/Forums/zh/winformsdatacontrols/thread/d84a7261-0c92-4619-b1b2-34d4bd667151

Here you will get example.