Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
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Dim s As String = TextBox1.Text
If Not ((Mid(s, Len(s), 1) = "0" And Mid(s, Len(s), 1) = "9") Or (Mid(s, Len(s), 1) = "A" And Mid(s, Len(s), 1) = "Z")) Then
s = Microsoft.VisualBasic.Left(s, Len(s) - 1)
TextBox1.Text = s
TextBox1.SelectionStart = Len(TextBox1.Text)
End If
End Sub
private str as string 'str最好定义到外面
Private Sub TextBox1_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyUp
Dim d As Double
If Double.TryParse(TextBox1.Text, d) Or TextBox1.Text = "-" Or TextBox1.Text.Trim() = "" Then
str = TextBox1.Text
Else
TextBox1.Text = str
TextBox1.SelectionStart = TextBox1.Text.Length
TextBox1.Focus()
End If
End Sub
有一个属性就是设置只允许输入指定字符的
如果没记错的话叫valueOnly
输入0123456789就可以实现
以下是只能输入数字和小数点，并且小数点只能输入一次
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Textbox1.KeyPress
If Char.IsDigit(e.KeyChar) or e.KeyChar = Chr(8) or e.KeyChar = "." Then
If e.KeyChar = "." And InStr(TextBox1.Text, ".") 0 Then
e.Handled = True
Else
e.Handled = False
End If
Else
e.Handled = True
End If
End Sub
每个textbox都有KeyPress事件（event），每次用户输入一个字符时检测，如不满足则清空
我现在不在vs下，你可以找到这个面板，绑定相应的函数
比如只能显示数字
Private Sub NumBox_KeyPress(KeyAscii As Integer)
If Not IsNumeric(NumBox.Text) Then
NumBox.Text = ""
End If
End Sub
只能显示英语（a-z 97-122； A-Z 65-90； 8（退格）和13（换行））
Private Sub EngBox_KeyPress(KeyAscii As Integer)
If Not (KeyAscii = 97 And KeyAscii=122) Or (KeyAscii = 90 And KeyAscii=65) Or = 8 Then
EngBox.Text = ""
End If
End Sub
只能显示汉字（汉字的ASCII值要么小于0，要么是8（退格）和13（换行））
Private Sub ChineseBox_KeyPress(KeyAscii As Integer)
If Not KeyAscii 0 Or KeyAscii = 8 Or KeyAscii = 13 Then
ChineseBox.Text=""
End If
End Sub
做了一些小修改，不明白请及时追问，满意敬请采纳，O(∩_∩)O谢谢
第一部、先定义一个单元格操作变量，如下
Dim cellEdit As DataGridViewTextBoxEditingControl = Nothing
第二部、然后在在控件的EditingControlShowing事件中添加入下代码，参考如下：
Private Sub DataGridView3_EditingControlShowing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DataGridView3.EditingControlShowing
cellEdit = CType(e.Control, DataGridViewTextBoxEditingControl)
cellEdit.SelectAll()
AddHandler cellEdit.KeyPress, AddressOf dataGridView3_KeyPress
End Sub
第三部：在要控制的列加入控件键盘按钮的代码，如下面ROLL列是要控制的列
Private Sub dataGridView3_KeyPress(ByVal sender As Object, ByVal e As KeyPressEventArgs) Handles DataGridView3.KeyPress
Dim i As Integer = DataGridView3.CurrentCellAddress.X
Dim ColumnName As String = DataGridView3.Columns(i).Name
If (ColumnName = "rollno") Then
If Not Char.IsDigit(e.KeyChar) And e.KeyChar Chr(8) Then
e.Handled = True
End If
End If
End Sub