The trick is to set the Validating Type of the Masked Text Box control to the type of data you want to get from the user.
If you do this, as well as subscribe to the Type Validation Completed event, on the form Load event, you can handle user validation inside your Type Validation Completed event handler.
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.
Private Sub txt Student Name_Validating(By Val sender As Object, By Val e As System.
Set Error(txt Student Name, "") End If End Sub Open Error Providel solution in Visual Studio. There are two projects inside Error Providel solution. Second Project is a sample usage for extended error provider. Checked Then 'if student's age is less than 10, emergency contact is mandatory My Error Provider. Validate = True Else 'if student's age is greater than 10, emergency contact is not mandatory My Error Provider. Validate = False End If I have used an extended collection base class for Error Provider Extended. It uses Validation Control Collection class which is derived from Collection Base class. Validation Control class has all required properties like Display Name, Error Message, Validate, Control Obj etc.
The Problem You want your program to validate form input, provide feedback to the user, and perhaps take other actions to handle the condition. Limitations This article presents a useful solution, though not a solution for every case.
I just discovered that the Masked Text Box control allows you to set the type of data which should be entered in the control and helps you do the validation of that data when necessary.
Summary Message = "Following fields are mandatory," 'Following function checks all empty fields and returns TRUE if all fields are entered.
Add(txt Emergency Contact, "Emergency Contact Number") 'Initially make emergency contact field as non mandatory My Error Provider. Validate = False 'Set summary error message My Error Provider.
Furthermore, it's unnatural to conceptualize the steps of validation as of the data to be validated.
For example, if you were describing the input, you might say, "It should be between five and eight characters; it should be numeric and non-negative; it should always end in the digit '5,' etc." The concept of considering the data qualities rather than the validation process leads to the validation engine discussed in this article.
The Container Control property must be set to the appropriate container (usually the Windows Form) in order for the Error Provider component to display an error icon on the form.
When the component is added in the designer, the Container Control property is set to the containing form; if you add the control in code, you must set it yourself.
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.