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In this case, I think the simplest solution is to validate these textboxes in the Save button's Click event handler, instead of validating the textboxes in their Validating event handler. None" above prevents the dialog box from closing & returning Dialog Result. Here's my code | | Private Sub Save() | For each c as control in Me. Of course, you could include the code of validating these textboxes in a function and call this function in the Save button's Click event handler. If you have anything unclear, please feel free to let me know. None Exit For End If End If Next End Sub NOTE: This loop probably should be recursive to get controls within container controls, within other container controls... This exam objective covers the Error Provider control and various other input validation techniques. NET Framework adopts the Windows structured exception handling model. If you feel the need to create custom Exception classes to meet specific requirements of your application, you can derive from the Application Exception class.Every program must validate the data it receives before it proceeds with further data processing or storage.m_Sqlstr = "Select Distinct RFID, Prod_Code, Lot_No From Scan Stk Where Batch No = '" & str Batchno & "' " m_Sql Cmd = New Sql Command(m_Sqlstr, Con) Con. Close Connection) With m_Bindingsrc Detail While RFIDReader. In this chapter I'll discuss the various techniques you can use to validate data and maintain the integrity of your application.

LISTING 5.4 USING THE VALIDATE EVENT PROCEDURE Private Sub txt Age_Validate(Cancel As Boolean) If Not Is Numeric(txt Age. In this case, you needn't cycle through every control and call its Select method to force validation. NET Application Architect, Enthusiast, & Evangelist T. Bradley - news: OH**************@TK2MSFTNGP04gbl... |I have a windows form that I want to force validation on controls (text | boxes) when the user clicks a "Save" button.However, if the user doesn't edit in any textbox on the form and click the Save button directly, the textbox's Validating event won't be raised. The only way I've found to do | this is to cycle through every control and call it's . This | is clunky though because you can see a flash in each text box as it's being | validated. Select() | End if | Next c | End Sub | | Each control has code in their Control_Validating event that fires off an | errorprovider.I have a windows form that I want to force validation on controls (text boxes) when the user clicks a "Save" button. Select() End if Next c End Sub Each control has code in their Control_Validating event that fires off an errorprovider. Here's my code Private Sub Save() For each c as control in Me. Try using the Lock Window Update API call to prevent the objects from being updated while you cycle through the list. If you hit an error, or you successfully reach the end of the list, a call to Lock Window Update(0&) releases the lock.The only way I've found to do this is to cycle through every control and call it's . This is clunky though because you can see a flash in each text box as it's being validated. Select() End if Next c End Sub Each control has code in their Control_Validating event that fires off an errorprovider. Here's my code Private Sub Save() For each c as control in Me. Since only one lock can be in place at any one time you would want to lock the whole form during the validation phase.

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