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Hi there, I have a question regarding datagridview, I add data to the datagridview in an interface and all the validation for the datagridview cell is in the datagridview cell validating event for the datagridview.

I display the data of the is datagridview in another interface and make the cells read-only. But the thing is when I click on a row that data was added previously and press the Add new row the cell validating event is triggered.

Code Snippet: Validate all form controls when the Create Appointment button is clicked If the user clicks the Create Appointment button and the data is not valid, error indicators are displayed next to the controls with invalid data.

Also, your own Validate Me method does not need to have a datagridview or cell passed in as a parameter - you will have access to all of those controls from your method.

Code Snippet: Validate the Date Selection Invoking the Set Error method of the Error Provider control displays an error indicator image next to the control specified as the first argument to the Set Error method.

The string specified in the second argument in the function invocation is displayed as the tooltip when the mouse is moved over the Error indicator.

Any resemblance to other material is an un-intentional coincidence and should not be misconstrued as malicious, slanderous, or any anything else hereof.

Conclusion In this example, we learned how to invoke validate input to Windows Forms controls and display user-friendly informative error messages.

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In this example, we will see how to use the Error Provider control in Windows forms to provide validations in Windows Forms and display user-friendly error messages to the user if the validation fails. Add controls as shown in the figure below and set the properties of the controls as indicated in the table.

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