Error Text = Nothing End Sub Private Sub dgv Equipment_Cell Leave(By Val sender As Object, _ By Val e As System. Cell Leave End Sub Private Sub Equipment Validation By Cell(By Val sender As Object, _ By Val e As System. Data Grid View Cell Event Args) _ Handles dgv Equipment. Data Grid View Cell Parsing Event Args) _ Handles dgv Equipment. The Data Grid View control of Windows Forms is a versatile control that can help you create professional-looking data entry forms.Take advantage of the Data Annotation Model Binder to perform validation within an ASP. Learn how to use the different types of validator attributes and work with them in the Microsoft Entity Framework. Finally, the Unit Price property must match a regular expression pattern that represents a currency amount.At run time, if the validation fails, the Data Grid View displays a red exclamation icon in that cell (see below).Hovering the mouse pointer on the icon displays the Error Text that you set earlier.This eliminates the possibility the end-users will incorrectly enter the values.
This is a community of tens of thousands of software programmers and website developers including Wrox book authors and readers. By joining today you can post your own programming questions, respond to other developers questions, and eliminate the ads that are displayed to guests. I am deliberately entering invalid data into my datagrid cell, but it still 'passes' 'validation'. Here's my code: Public Class frm Scan Equipment In Private int Phone Identity As Integer Private int Network ID As Integer Private str Cell ESN As String Dim str Conn As Sql Connection Private APC_Wireless Connection String As String = DBHandling. Private Sub dgv Equipment_Cell Validated(By Val sender As Object, _ By Val e As Data Grid View Cell Event Args) _ Handles dgv Equipment. I have been working on this for 'days' and am getting more and more frustrated. Private Function Equipment Number Validation(By Ref str Cell ESN As String) As Boolean Dim int Str Len As Integer = Len(str Cell ESN) Msg Box("Value, Length of str Cell ESN: " & str Cell ESN & ", " & (CType(int Str Len, String))) Msg Box("Value of int Network ID: " & (CType(int Network ID, String))) Select Case int Network ID Case 1 Select Case Len(str Cell ESN) Case 11 Case 18 Return True Case Else Return False End Select Case 4 Select Case Len(str Cell ESN) Case 15 Return True Case Else Return False End Select Case Else Return False End Select End Function I would really appreciate the help.In this tutorial, you learn how to use the Data Annotation validators to perform validation in an ASP. The advantage of using the Data Annotation validators is that they enable you to perform validation simply by adding one or more attributes – such as the Required or String Length attribute – to a class property. Listing 1: Models\The Product class illustrates how to use one additional attribute: the Display Name attribute.Before you can use the Data Annotation validators, you must download the Data Annotations Model Binder. Next click the Browse tab and browse to the location where you downloaded (and unzipped) the Data Annotations Model Binder sample (see Figure 1). The Display Name attribute enables you to modify the name of the property when the property is displayed in an error message.