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    C textbox validating errorprovider

    Let’s begin: Open the Visual Basic and create a new Windows Form Application.

    Drag the two Text Boxes, a Button and an Error Provider in the Form.

    A is a string made up of characters from a masking language that specifies which characters can be entered at any given position in the text box. If the user types an incorrect entry, for example, the user types a letter when a digit is required, the control will automatically reject the input.

    The masking language that is used by Masked Text Box is very flexible.

    error Provider (C#): Error Provider Data Grid View - C#.

    Error Provider - C# textbox, Error Provider button, textbox.

    When users enter data into your application, you may want to verify that the data is valid before your application uses it.

    An email address is a string of a subset of ASCII characters separated into two parts by an @ symbol . Is Match Method (String, String) - indicates whether the specified regular expression finds a match in the specified input string.

    In the Following example we will use the to validate the enter text into the textbox control.

    We have a textbox control on the windows form that enable user to enter the correct PIN Code up to six characters.

    This example assumes that a Text Box and Error Provider control have been created on a form. Length = 0 Then error Message = "E-mail address is required." Return False End If ' Confirm that there is an "@" and a "." in the e-mail address, and in the correct order. Cr _ "For example '[email protected]' " Return False End Function Private Sub text Box1_Validating(By Val sender As Object, _ By Val e As System. Text, error Msg) Then ' Cancel the event and select the text to be corrected by the user. Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family Control Class | Control Members | System.

    Private Function Valid Email Address(By Val email Address As String, By Ref error Message As String) As Boolean ' Confirm there is text in the control.

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