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12-Aug-2017 12:24

Private Sub Data Grid View1_Row Validatin I've put togethere this demo. Setting e.cancel=True in that doesn't (as we've been discussing) in all circumstances stop everything else happening.To overcome that there is a Row Dirty flag which is set when a Row Validating error occurs and cleared when it is corrected, and other controls' subs are exited while the flag is set. Now, the concern that you've been expressing is that - even if other controls are disabled in that way - the user might go back to the datagridview and move to another row and make an invalid entry in that.Cell Validated: Fires after the cell has finished validating. Row Validated: Fires after a row has finished validating.Data Error: Fires when an error on the Data Source side occurs, e.g.In both events I am only checking one field against one rule and you will probably need to do much more than that, including using the properties of the e object in each of the subs to find out exactly what needs correcting and in what way.But the point of this demo is - hopefully - to show that your concerns about users being able to muck up numerous rows is unfounded.So, for instance, in this question you are using the Row Validating event but appear, within it, to be checking the value of only one cell within the Row concerned.

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Your code will need to be more complicated than this.The reason that I want you to try the demo, at least in the first instance, exactly as it stands is to try and do that with it. I've tried altering existing records to make them violate one or other of the rules.I've tried using the new records facility (the row with "*" in the row header) to add a new row that breaks the rules.Another of your questions is concerned with trying to get the Error Text to show, but you are using the Cell Validating event in that.The more normal approach is to use Error Text with a Row Validating event.

Your code will need to be more complicated than this.The reason that I want you to try the demo, at least in the first instance, exactly as it stands is to try and do that with it. I've tried altering existing records to make them violate one or other of the rules.I've tried using the new records facility (the row with "*" in the row header) to add a new row that breaks the rules.Another of your questions is concerned with trying to get the Error Text to show, but you are using the Cell Validating event in that.The more normal approach is to use Error Text with a Row Validating event.However, the editor will be closed in this case and the value will be committed to the underlying data source.