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Bipin Joshi is the proprietor of Binary Intellect Consulting, where he conducts premier training programs on . He wears many hats, including software consultant, mentor, prolific author, webmaster, Microsoft MVP, and member of ASPInsiders. Having adopted the Yoga way of life, Bipin also teaches Kriya Yoga to interested individuals. - This posting is provided "as is" with no warranties and confers no rights.Jeffrey, Though I original thought that this would work, I have since realized that the Row Validation event does not trigger at a time which makes it feasible to stop a user from leaving a row when there is theoretically invalid data in the record.Although you used Data Set as the source of your data, you also could have used generic collections if required.You can download the code that accompanies the article here.As far as I can tell, the code on your site only helps with validating the data, not stopping the Row Leave event entirely.
For Data Grid View, it has a Cell Validating and Row Validating events, these 2 event handlers take Data Grid View Cell Validating Event Args/Data Grid View Cell Cancel Event Args type paramters. We can set Cancel property to true to prohibit the user from selecting another row. Hope this helps Best regards, Jeffrey Tan Microsoft Online Partner Support Get Secure! If I use the following code to dump out the cell content in Row Validating event, I will always get the original leaving row content, not the entering row content: private void data Grid View1_Row Validating(object sender, Data Grid View Cell Cancel Event Args e) Also, we should write the validating logic code.In many places in my application, I have a Data Grid View which users can either enter data into or use as a method of navigation in a master/detail form view.I need a method of stopping the user from leaving a row if there is invalid data in it (e.g., a field that cannot be null is).Update: It appears it simply validates both when you are attempting to exit a row and when you are attempting to enter one.So the real question would be how to stop it from running the function if it's entering the row.
In your example, you use the Cell Validating event, as shown below: Here, you want to ensure that the length of the new Customer ID is at least five characters.