VB.NET：如何验证文本框不允许小数值？

Question

我想知道如何验证文本框不允许任何小数值？

Answer 1

这个解决方案来自这个链接（How to allow user to enter only numbers in a textbox in vb.net?）

   Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
    If (Microsoft.VisualBasic.Asc(e.KeyChar) < 48) _
              Or (Microsoft.VisualBasic.Asc(e.KeyChar) > 57) Then
            e.Handled = True
    End If
    If (Microsoft.VisualBasic.Asc(e.KeyChar) = 8) Then
            e.Handled = False
    End If
End Sub

Answer 2

您可以使用KeyPress事件并使用IsNumeric功能捕获数字键。

Private Sub TextBox1_KeyPress(sender As System.Object, e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
    If IsNumeric(e.KeyChar) Then
        e.Handled = True
    End If
End Sub

Answer 3

如果可以，请使用MaskedTextBox

由于处理KeyPress会导致删除/退格/复制/粘贴/...

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