C#/asp.net中如何將數字全形半形互轉

C#/asp.net中如何將數字全形半形互轉？

    //使用者公用靜態類，包含公用靜態方法
    ///
<summary>
    ///
使用者公用靜態類，包含公用靜態方法
    ///
</summary>
    public
static class UserPublicStaticMethod
    {

       
//把字母,數字由半形轉化為全形
       
/// <summary>
       
/// 把字母,數字由半形轉化為全形
       
/// </summary>
       
/// <param name="str">原始字串</param>
       
/// <returns>全形字元串</returns>
       
public static string ChangeStrToSBC(string str)
       
{

           
char[] c = str.ToCharArray();
           
for (int i = 0; i < c.Length; i++)
           
{
               
byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
               
if (b.Length == 2)
               
{
                   
if (b[1] == 0)
                   
{
                       
b[0] = (byte)(b[0] - 32);
                       
b[1] = 255;
                       
c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
                   
}
               
}
           
}
           
//半形  
           
string strNew = new string(c);
           
return strNew;
       
}

       
//將字母，數字由全形轉化為半形
       
/// <summary>
       
/// 將字母，數字由全形轉化為半形
       
/// </summary>
       
/// <param name="str">原始字串</param>
       
/// <returns>半形字元串</returns>
       
public static string ChangeStrToDBC(string str)
       
{
           
string s = str;
           
char[] c = s.ToCharArray();
           
for (int i = 0; i < c.Length; i++)
           
{
               
byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
               
if (b.Length == 2)
               
{
                   
if (b[1] == 255)
                   
{
                       
b[0] = (byte)(b[0] + 32);
                       
b[1] = 0;
                       
c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
                   
}
               
}
           
}
           
//半形  
           
string news = new string(c);
           
return news;
       
}

}