您可以使用String.Compare方法:String.Compare (String strA, String strB, Boolean ignoreCase)
通ignoreCase
参数与true
将执行区分大小写的比较。
If String.Compare(TextBox2.Text, "a", true) = 0 AndAlso String.Compare(TextBox21.Text, "a", true) = 0 Then
'MessageBox.Show("A")
totCorrect = totCorrect + corAns
ElseIf String.Compare(TextBox2.Text, "b", true) = 0 AndAlso String.Compare(TextBox21.Text, "b", true) = 0 Then
'MessageBox.Show("B")
totCorrect = totCorrect + corAns
ElseIf String.Compare(TextBox2.Text, "c", true) = 0 AndAlso String.Compare(TextBox21.Text, "c", true) = 0 Then
'MessageBox.Show("C")
totCorrect = totCorrect + corAns
ElseIf String.Compare(TextBox2.Text, "d", true) = 0 AndAlso String.Compare(TextBox21.Text, "d", true) = 0 Then
'MessageBox.Show("D")
totCorrect = totCorrect + corAns
Else
totWrong = totWrong + wrgAns
Label13.Visible = True
End If
另一个想法是大写或小写使用ToUpper或ToLower输入。
Option Compare Text
如果上面的行添加到代码的开头:
If TextBox2.Text.ToUpper() = "A" AndAlso TextBox21.Text.ToUpper() = "A" Then
'MessageBox.Show("A")
totCorrect = totCorrect + corAns
ElseIf TextBox2.Text.ToUpper() = "B" AndAlso TextBox21.Text.ToUpper() = "B" Then
'MessageBox.Show("B")
totCorrect = totCorrect + corAns
ElseIf TextBox2.Text.ToUpper() = "C" AndAlso TextBox21.Text.ToUpper() = "C" Then
'MessageBox.Show("C")
totCorrect = totCorrect + corAns
ElseIf TextBox2.Text.ToUpper() = "D" AndAlso TextBox21.Text.ToUpper() = "D" Then
'MessageBox.Show("D")
totCorrect = totCorrect + corAns
Else
totWrong = totWrong + wrgAns
Label13.Visible = True
End If
看到这个:http://msdn.microsoft.com/en-us/library/system.string.compare(v=vs.80).aspx – David 2013-03-25 02:31:01
谢谢,这是非常有用的 – Brandon 2013-03-25 12:46:07