Textbox validating event in vb net


03-Dec-2018 08:39

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Gets or sets a value indicating whether pressing the TAB key in a multiline text box control types a TAB character in the control instead of moving the focus to the next control in the tab order.(Inherited from Text Box Base.) This API supports the product infrastructure and is not intended to be used directly from your code.

Gets or sets a value indicating whether control drawing is done in a buffer before the control is displayed.

This property is not relevant for this class.(Inherited from Text Box Base.)Gets a value indicating whether the caller must call an invoke method when making method calls to the control because the caller is on a different thread than the one the control was created on.(Inherited from Control.)Invalidates the specified region of the control (adds it to the control's update region, which is the area that will be repainted at the next paint operation), and causes a paint message to be sent to the control.(Inherited from Control.)Invalidates the specified region of the control (adds it to the control's update region, which is the area that will be repainted at the next paint operation), and causes a paint message to be sent to the control.

Optionally, invalidates the child controls assigned to the control.(Inherited from Control.)Invalidates the specified region of the control (adds it to the control's update region, which is the area that will be repainted at the next paint operation), and causes a paint message to be sent to the control.(Inherited from Control.)Invalidates the specified region of the control (adds it to the control's update region, which is the area that will be repainted at the next paint operation), and causes a paint message to be sent to the control.

Optionally, invalidates the child controls assigned to the control.(Inherited from Control.) This API supports the product infrastructure and is not intended to be used directly from your code.

Raises the Invalidated event with a specified region of the control to invalidate.(Inherited from Control.) This API supports the product infrastructure and is not intended to be used directly from your code. This event is not relevant for this class.(Inherited from Text Box Base.) control, the user can enter text in an application.

Typically, a until the cursor (caret) is within the visible region of the control, you can use the Scroll To Caret method.

To select a range of text in the text box, you can use the Select method.

You can check the text string, i.e., textbox1.text, to make sure it has nothing besides alphabet characters in the . This will catch an error when the user tabs to the next control, for example.

You can do this using a regular expression (import System. Regular Expressions for this example), or you can check the text "manually." Private Sub Text Box1_Leave(By Val sender As Object, By Val e As System.

Success Then Msg Box("Please enter alpha text only.") Text Box1.

This API supports the product infrastructure and is not intended to be used directly from your code.