. Net uses urlencode in winform for string encoding and uppercase letters

. Net urlencode encoded strings are all lowercase letters. to use this method in winform, do not reference redundant Assembly, such as system. web and so on. Therefore, this method is extracted and slightly modified. In this way, all the letters in the encoded string are in uppercase. See the following ~ Share it .. The efficiency should be faster than that spread outside.

 

public static string UrlEncode( string str ) {            return UrlEncode( str, System.Text.Encoding.UTF8 );        }        public static string UrlEncode( string str, Encoding e ) {            if (str == null) {                return null;            }            return Encoding.ASCII.GetString( UrlEncodeToBytes( str, e ) );        }        private static byte[] UrlEncodeToBytes( string str, Encoding e ) {            if (str == null) {                return null;            }            byte[] bytes = e.GetBytes( str );            return UrlEncodeBytesToBytesInternal( bytes, 0, bytes.Length, false );        }        private static byte[] UrlEncodeBytesToBytesInternal( byte[] bytes, int offset, int count, bool alwaysCreateReturnValue ) {            int num = 0;            int num2 = 0;            for (int i = 0; i < count; i++) {                char ch = (char)bytes[offset + i];                if (ch == ' ') {                    num++;                }                else if (!IsSafe( ch )) {                    num2++;                }            }            if ((!alwaysCreateReturnValue && (num == 0)) && (num2 == 0)) {                return bytes;            }            byte[] buffer = new byte[count + (num2 * 2)];            int num4 = 0;            for (int j = 0; j < count; j++) {                byte num6 = bytes[offset + j];                char ch2 = (char)num6;                if (IsSafe( ch2 )) {                    buffer[num4++] = num6;                }                else if (ch2 == ' ') {                    buffer[num4++] = 43;                }                else {                    buffer[num4++] = 37;                    buffer[num4++] = (byte)IntToHex( (num6 >> 4) & 15 );                    buffer[num4++] = (byte)IntToHex( num6 & 15 );                }            }            return buffer;        }        private static bool IsSafe( char ch ) {            if ((((ch >= 'a') && (ch <= 'z')) || ((ch >= 'A') && (ch <= 'Z'))) || ((ch >= '0') && (ch <= '9'))) {                return true;            }            switch (ch) {                case '\'':                case '(':                case ')':                case '*':                case '-':                case '.':                case '_':                case '!':                    return true;            }            return false;        }        private static char IntToHex( int n ) {            if (n <= 9) {                return (char)(n + 48);            }            return (char)((n - 10) + 65);        }