format fileInfo length to KB

1. reference
using System.Globalization;

2. use this function
FormatSize(new FileInfo(fileName).length);
protected string FormatSize(long lSize)
        {
            //Format number to KB
            string stringSize = "";
            NumberFormatInfo myNfi = new NumberFormatInfo();

            long lKBSize = 0;

            if (lSize < 1024)
            {
                if (lSize == 0)
                {
                    //zero byte
                    stringSize = "0";
                }
                else
                {
                    //less than 1K but not zero byte
                    stringSize = "1";
                }
            }
            else
            {
                //convert to KB
                lKBSize = lSize / 1024;
                //format number with default format
                stringSize = lKBSize.ToString("n", myNfi);
                //remove decimal
                stringSize = stringSize.Replace(".00", "");
            }

            return stringSize + " KB";

        } 
張貼者：