vb.net教程
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/// <summary>
/// 转全角的函数(SBC case)
/// </summary>
/// <param name="input">任意字符串</param>
/// <returns>全角字符串</returns>
///<remarks>
///全角空格为12288，半角空格为32
///其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248
///</remarks>
public string ToSBC(string input)
{
//半角转全角：
char[] c=input.ToCharArray();
for (int i = 0; i < c.Length; i++)
{
if (c[i]==32)
{
c[i]=(char)12288;
continue;
}
if (c[i]<127)
c[i]=(char)(c[i]+65248);
}
return new string(c);
}
/// <summary>
/// 转半角的函数(DBC case)
/// </summary>
/// <param name="input">任意字符串</param>
/// <returns>半角字符串</returns>
///<remarks>
///全角空格为12288，半角空格为32
///其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248
///</remarks>
public string ToDBC(string input)
{
char[] c=input.ToCharArray();
for (int i = 0; i < c.Length; i++)
{
if (c[i]==12288)
{
c[i]= (char)32;
continue;
}
if (c[i]>65280 && c[i]<65375)
c[i]=(char)(c[i]-65248);
}
return new string(c);
}
VB版本：
Public Function ToSBC(ByVal input As String) As String '转全角
Dim c As Char() = input.ToCharArray
Dim i As Integer = 0
While i < c.Length
If c(i) = ChrW(32) Then
c(i) = ChrW(12288)
ElseIf AscW(c(i)) < 127 Then
c(i) = ChrW((AscW(c(i)) + 65248))
End If
System.Math.Min(System.Threading.Interlocked.Increment(i), i - 1)
End While
Return New String(c)
End Function
Public Function ToDBC(ByVal input As String) As String '转半角
Dim c As Char() = input.ToCharArray
Dim i As Integer = 0
While i < c.Length
If AscW(c(i)) = 12288 Then
c(i) = ChrW(32)
ElseIf AscW(c(i)) > 65280 AndAlso AscW(c(i)) < 65375 Then
c(i) = ChrW(AscW(c(i)) - 65248)
End If
System.Math.Min(System.Threading.Interlocked.Increment(i), i - 1)
End While
Return New String(c)
End Function
