TextBox keypress event in VB.NET
This article defines that user can enter only numbers in the textbox and deny rest.
This article defines that user can enter only numbers in the textbox and deny rest.
KeyPress Event
This Occurs when a key is pressed while the control has focus.
example-1
This example define simple effect of the KeyPress Event when we press any key.
VB code
Public Class Form1
Private Sub TextBox1_KeyPress(ByVal sender As System.Object, ByVal e AsSystem.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
MessageBox.Show("KeyPress")
e.Handled = True
End Sub
End Class
Now run the application and press any key. This will display a message Box.
Image1
Example-2
This example defines that a user can enter only numbers in the textbox and deny rest.
VB Code
Public Class Form1
Private Sub TextBox1_KeyPress(ByVal sender As System.Object, ByVal e AsSystem.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
If (e.KeyChar < Chr(48) Or e.KeyChar > Chr(57)) And e.KeyChar <> Chr(8) Then
e.Handled = True
MessageBox.Show("Please enter only number")
End If
End Sub
End Class
Now run the application.
Figure2
Now enter number it will work fine.
Figure3
Now enter the character in the textbox. This will display an error.
Figure4