允许用户使用键码进行一些按键操作 [英] allow user some keypress with keycode

问题描述

 我希望能够只输入数字，小键盘，减号键，删除键和空格和小数。

 i want to be able to type only numbers, ,numpad, minus key, delete key and backpace and decimal.

因为某些原因它不起作用。我只能在字母上面输入数字..

for somereason it does not work. i can only type the numbers above letters..

会对某些知识感到满意：）

would be happy for some knowladge :)

我知道这种方法可能不是你的好感但是这种方式我不明白..  

i know this method is probably not your favor but this way i undestand..  

  If (e.KeyCode >= Keys.D0 And e.KeyCode <= Keys.D9 And e.Modifiers <> Keys.Shift) Or (e.KeyCode >= Keys.NumPad0 And e.KeyCode <= Keys.NumPad9) And e.KeyCode <> Keys.Left And e.KeyCode <> Keys.Right And e.KeyCode <> Keys.Back And e.KeyCode <> Keys.Decimal And e.KeyCode <> Keys.Delete And e.KeyCode <> Keys.OemMinus Then
            e.SuppressKeyPress = False
        Else
            e.SuppressKeyPress = True



        End If

谢谢，

Noam。

推荐答案

你好，



看看这对你有帮助吗？ b $ b

Hello,

See if this helps to you

    Private Sub TextBox1_KeyPress(sender As System.Object, e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
        Try
            If Not Char.IsDigit(e.KeyChar) And Not Char.IsControl(e.KeyChar) And Not e.KeyChar = "." And Not e.KeyChar = "-" Then
                e.Handled = True
            End If
        Catch ex As Exception
            Dim errormsg As String = String.Empty
            errormsg = ex.ToString()
        End Try
    End Sub

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