C maskedtextbox validatingtype

You can bind a Data Table to the control so the user can easily add/delete/modify data in a database. Products) End Sub By default, the automatically generated columns may need some tweaking.

Let's say that you have a Microsoft Access database that you plan to use in your program. For example, all columns are aligned to the left and have have no formatting.

The remaining overrides are to adjust to the fact that the Masked Text Box control supports multiple "validating types". Editing Control Formatted Value Get Return Me.value Is Changed. End Sub Public Read Only Property Reposition Editing Control On Value Change() As Boolean _ Implements IData Grid View Editing Control.

Public Class Data Grid View Masked Edit Cell Inherits Data Grid View Text Box Cell Dim p Column As Data Grid View Masked Edit Column Public Sub New() End Sub Public Overrides Sub Initialize Editing Control(By Val row Index As Integer, By Val _ initial Formatted Value As Object, By Val data Grid View Cell Style As Data Grid View Cell Style) My Base. To String End Get Set(By Val value As Object) If Type Of value Is [String] Then Me. To String End If End Set End Property Public Function Get Editing Control Formatted Value(By Val context As _ Data Grid View Data Error Contexts) As Object Implements _ IData Grid View Editing Control. Text End Function Public Sub Apply Cell Style To Editing Control(By Val data Grid View Cell Style As _ Data Grid View Cell Style) Implements _ IData Grid View Editing Control. Reposition Editing Control On Value Change Get Return False End Get End Property Public Property Editing Control Data Grid View() As Data Grid View Implements _ IData Grid View Editing Control.

Below is an example of the automatically generated form Load Event and the manually-created Update button event handler for saving the data: Private Sub fm Main_Load(By Val sender As System. The Row Validating event and Error Provider may not be able to detect all errors.

New(New Data Grid View Masked Edit Cell()) End Sub Public Overrides Property Cell Template() As Data Grid View Cell Get Return My Base. Return Get Type(Masked Edit Editing Control) End Get End Property Public Overrides Read Only Property Value Type() As Type Get ' Return the type of the value that Masked Edit Editing Control contains. Validating Type End Get End Property Public Overrides Read Only Property Default New Row Value() As Object Get Return "" End Get End Property End Class Lastly, is the Editing Control. Back Color End Sub Public Property Editing Control Row Index() As Integer Implements _ IData Grid View Editing Control.

Cell Template End Get Set(By Val value As Data Grid View Cell) ' Ensure that the cell used for the template is a Masked Edit Cell If Not (value Is Nothing) And Not value. Is Assignable From( _ Get Type(Data Grid View Masked Edit Cell)) Then Throw New Invalid Cast Exception("Must be a Data Grid View Masked Edit Cell") End If My Base. It inherits from the Masked Text Box control (to get the user interface we want) and implements the Editing Control interface so that the control works inside the Data Grid View. Editing Control Row Index Get Return row Index Num End Get Set(By Val value As Integer) row Index Num = value End Set End Property Public Function Editing Control Wants Input Key(By Val key As Keys, By Val _ data Grid View Wants Input Key As Boolean) As Boolean Implements _ IData Grid View Editing Control.

This custom Data Grid View column control is contained in 3 classes...

A Column control that inherits from Data Grid View Column, a Cell control that inherits from Data Grid View Text Box Cell, and an Editing Control that implements the IData Grid View Editing Control interface The Masked Edit Column class is fairly straight forward; it only overrides one property (to ensure that the correct cell type it used).

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