The first argument of the xref.SetError%2A method specifies which control to display the icon next to. The ErrorProvider component displays an error icon () next to the relevant control, such as a text box when the user positions the mouse pointer over the.
Errorprovider vb.net icon placement code#
The following code tests the validity of the data the user has entered if the data is invalid, the xref.SetError%2A method is called.
Errorprovider vb.net icon placement windows#
For more information, see Creating Event Handlers on the Windows Forms Designer, Creating Event Handlers at Run Time for Windows Forms, and Creating Event Handlers in the Visual Basic Code Editor. Since the icon and message associated with the ErrorProvider can easily be changed, I figured that would be a good way to create a 'Warning Provider'. In order for this code to run properly, the procedure must be connected to the event. I have always liked using the ErrorProvider as an easy way to alert the user that something is wrong.
For more information, see How to: Create Event Handlers at Run Time for Windows Forms. Select the first control and add code to its Validating event handler. I assume, just for example, you are going to validate these two text box controls using Validating event. Set ImageList property of tabControl1 to imageList1. Drop a TabControl, an ErrorProvider and an ImageList on the Form. In order for this code to run properly, the procedure must be connected to the event. To setup the example, follow these steps: Create a Form. Im Beispiel wird ein Form Steuerelement erstellt, das ein TextBox Steuerelement, ein NumericUpDown Steuerelement und ein ComboBox Steuerelement enthlt, das jeweils den Inhalt berprft. Select the first control and add code to its xref.Validating event handler. Im folgenden Codebeispiel wird die Verwendung der ErrorProvider Klasse veranschaulicht, um den Benutzer ber einen Dateneingabefehler zu benachrichtigen. To display an error icon when a control's value is invalidĪdd two controls - for example, text boxes - to a Windows Form.Īdd an xref: component to the form. 1 Display All font installed in your system 2 Font dialog in VB.net 3 Font dialog: turn color option on. You must have at least two controls on the form in order to tab between them and thereby invoke the validation code. You can use a Windows Forms xref: component to display an error icon when the user enters invalid data. How to: Display Error Icons for Form Validation with the Windows Forms ErrorProvider Component
0 kommentar(er)
