主题：如何判定一个字符串中包含某字符的个数

比如一字符串："daew，，，，fewds",这个字符串中包含多个“，”，如何判断逗号“，”的个数，请那位高手指教

谢谢，看来不知道的东西还有很多

Dim s As String = ",da,,ew,,,,few,d,,s,"
Dim i As Integer
For j As Integer = 0 To s.Length - 1
    If s(j) = "," Then
        i + = 1
    End If
Next
MessageBox.Show(i)

Dim s As String = ",da,,ew,,,,few,d,,s,"
Dim i As Integer = s.Length - s.Replace(",","").Length
MessageBox.Show(i)

棋高一着，马胜一力。

Dim s As String = ",da,,ew,,,,few,d,,s,"
Dim Values() As String = s.Split(",")
MessageBox.Show(Values.Length-1)

 

类似这种问题没必要遍历，字符串越长效率越低！

编程就是缝缝补补，升级没完没了、补丁打个没完

感谢大家帮我释疑解惑，我把我提出这个问题的用途告诉大家，看有没有更好的办法。在帮助中有：StringBuilder方法，可大规模地合并字符串。

Dim v As String
Dim s As new StringBuilder
Dim cr As Row = Tables("干部信息").Current
s.Append(cr("姓名") & ",")
s.Append(cr("性别") & ",")

s.Append(cr("民族") & ",")
v = s.Tostring
Output.Show(v)

问题是：当性别、民族两列没有填入内容时，姓名后出现两个“，，”，有时候会出现三个“，，，”，这样就达不到要求，应该如何处理