1.只能输入数字和Backspace键
Private Sub txtSID_KeyPress(KeyAscii As Integer)
If KeyAscii = 8 Then
ElseIf KeyAscii < Asc(“0”) Or KeyAscii > Asc(“9”) Then
KeyAscii = 0
End If
End Sub
2. 只能输入大小写英文字母和汉字(包括退格和回车)
Private Sub txtName_KeyPress(KeyAscii As Integer)
If KeyAscii < 0 Or KeyAscii = 8 Or KeyAscii = 13 Then
ElseIf Not Chr(KeyAscii) Like “[a-zA-Z]” Then
KeyAscii = 0
End If
End Sub
3. 只能输入汉字
Private Sub txtDirector_KeyPress(KeyAscii As Integer)
If KeyAscii < 0 Or KeyAscii = 8 Then Exit Sub
KeyAscii = 0 ‘不能输入
End Sub
4.限制字符输入
1.Private Sub txtUserName_KeyPress(KeyAscii As Integer)
Select Case KeyAscii
Case 8
Case Asc(“A”) To Asc(“Z”)
Case Asc(“0”) To Asc(“9”)
Case Asc(“a”) To Asc(“z”)
Case Is < 0
Case Else
KeyAscii = 0
End Sel

这篇博客提供了几个VB代码示例,用于限制文本框输入的内容。包括只允许输入数字和Backspace键,只允许输入英文字母和汉字,只允许输入汉字,以及限制特定字符输入,例如禁止特殊符号。
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