如何多重驗證文本框?我只想要用戶輸入整數,但整數不應該是0或更少,我該怎麼做?這是我做了什麼:vb.net中的多重驗證[非0和數字]
If Val(txtCopies.Text) <= 0 Then
ErrorProvider1.SetError(txtCopies, "Number should be bigger than 0 ")
If IsNumeric(txtCopies.Text) = False Then
ErrorProvider1.SetError(txtCopies, "Number only")
Else
blabla
End If
End If