Question

vb.net程序要求在文本框中输入的英文字母一律用大写显示。怎么编程序。谢谢。急！

Answer 1

用Ucase("")函数，（""）中放字母
效果：ucase("abc")
结果：ABC

Answer 2

Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
If CInt(e.KeyChar) >= 97 AndAlso CInt(e.KeyChar) <= 122 Then
e.KeyChar = ChrW(CInt(e.KeyChar) - 32)
End If
End Sub

Answer 3

Private Sub Textbox1_TextChanged(ByVal sender As Object, ByVal e As EventArgs) Handles Textbox1.TextChanged
If Not Textbox1.Text = Textbox1.Text.ToUpper() Then
Textbox1.Text = Textbox1.Text.ToUpper()
End If
End Sub