vb.net 获取汉字首字母的办法

来源：互联网发布：ubuntu创建一个文件夹编辑：程序博客网时间：2024/06/06 16:46

建一个窗体，放两个文本框，一个输入汉字，一个显示拼音首字母，输入汉字的文本框TextChanged中调用getpy函数就行了

Public Class getchinesepyfirst
    Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
        getpy()
    End Sub

    Function getpy()
        Dim str As String
        Dim i As Integer
        str = TextBox1.Text.ToString
        Dim ret As String
        ret = ""
        For i = 1 To Len(str)
            ret = ret & getpychar(Mid(str, i, 1))
        Next
        TextBox2.Text = ret
        Return 0   '看需求也可以改成Return ret
    End Function

    '获取汉字拼音第一字母
    Function getpychar(ByVal as_char As String) As String
        Dim tmp
        tmp = 65536 + Asc(as_char)
        If (tmp >= 45217 And tmp <= 45252) Then
            getpychar = "A"
        ElseIf (tmp >= 45253 And tmp <= 45760) Then
            getpychar = "B"
        ElseIf (tmp >= 45761 And tmp <= 46317) Then
            getpychar = "C"
        ElseIf (tmp >= 46318 And tmp <= 46825) Then
            getpychar = "D"
        ElseIf (tmp >= 46826 And tmp <= 47009) Then
            getpychar = "E"
        ElseIf (tmp >= 47010 And tmp <= 47296) Then
            getpychar = "F"
        ElseIf (tmp >= 47297 And tmp <= 47613) Then
            getpychar = "G"
        ElseIf (tmp >= 47614 And tmp <= 48118) Then
            getpychar = "H"
        ElseIf (tmp >= 48119 And tmp <= 49061) Then
            getpychar = "J"
        ElseIf (tmp >= 49062 And tmp <= 49323) Then
            getpychar = "K"
        ElseIf (tmp >= 49324 And tmp <= 49895) Then
            getpychar = "L"
        ElseIf (tmp >= 49896 And tmp <= 50370) Then
            getpychar = "M"
        ElseIf (tmp >= 50371 And tmp <= 50613) Then
            getpychar = "N"
        ElseIf (tmp >= 50614 And tmp <= 50621) Then
            getpychar = "O"
        ElseIf (tmp >= 50622 And tmp <= 50905) Then
            getpychar = "P"
        ElseIf (tmp >= 50906 And tmp <= 51386) Then
            getpychar = "Q"
        ElseIf (tmp >= 51387 And tmp <= 51445) Then
            getpychar = "R"
        ElseIf (tmp >= 51446 And tmp <= 52217) Then
            getpychar = "S"
        ElseIf (tmp >= 52218 And tmp <= 52697) Then
            getpychar = "T"
        ElseIf (tmp >= 52698 And tmp <= 52979) Then
            getpychar = "W"
        ElseIf (tmp >= 52980 And tmp <= 53688) Then
            getpychar = "X"
        ElseIf (tmp >= 53689 And tmp <= 54480) Then
            getpychar = "Y"
        ElseIf (tmp >= 54481 And tmp <= 62289) Then
            getpychar = "Z"
        Else '如果不是中文，则不处理
            getpychar = as_char
        End If
    End Function
End Class