C#将数字转正字母的方法

将列号（数字）转换成Excel的字母列名

如

1→A

28→AB 

实现：
private string getCellCode(int inCell)
{
string strRet = "A";
if (inCell >= 1 && inCell <= 256)
{
<span style="white-space:pre"> </span>if (inCell <= 26)
{
<span style="white-space:pre"> </span> Byte[] bytes = new Byte[] { (byte)(inCell + 64) };
ASCIIEncoding ascii = new ASCIIEncoding();
strRet = ascii.GetString(bytes);
}
else
{
<span style="white-space:pre"> </span> int int1 = 0;
int int2 = 0;
<span style="white-space:pre"> </span> if (inCell - (int)(inCell / 26) * 26 == 0)
<span style="white-space:pre"> </span> {
<span style="white-space:pre"> </span>int1 = (int)(inCell / 26) + 63;
<span style="white-space:pre"> </span>int2 = 90;
}
<span style="white-space:pre"> </span> else
<span style="white-space:pre"> </span> {
<span style="white-space:pre"> </span>int1 = (int)(inCell / 26) + 64;
<span style="white-space:pre"> </span>int2 = (inCell - (int)(inCell / 26) * 26) + 64;
}
Byte[] bytes = new Byte[] { (byte)int1, (byte)int2 };
ASCIIEncoding ascii = new ASCIIEncoding();
strRet = ascii.GetString(bytes);
<span style="white-space:pre"> </span>}
}
return strRet;
}