Encodes a URL string. These method overloads can be used to encode the entire URL, including query-string values. - CSharp System

CSharp examples for System:String Encode Decode

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Description

Encodes a URL string. These method overloads can be used to encode the entire URL, including query-string values.

Demo Code

//     Copyright (c) Microsoft Corporation.  All rights reserved.
using System.Text;
using System;/* ww w . ja  v  a 2 s.  c om*/

public class Main{
        /// <summary>
		/// Encodes a URL string. These method overloads can be used to encode the entire URL, including query-string values.
		/// </summary>
		/// <remarks>
		/// (c) Microsoft Corporation 2013. Code ported from .NET 4.5 4.5.50709.0.
		/// </remarks>
		/// <param name="bytes"></param>
		/// <param name="offset"></param>
		/// <param name="count"></param>
		/// <returns></returns>
		public static byte[] UrlEncode( byte[] bytes, int offset, int count ) {

			if( !ValidateUrlEncodingParameters( bytes, offset, count ) ) {
				return null;
			}

			int cSpaces = 0;
			int cUnsafe = 0;

			// count them first 
			for( int i = 0; i < count; i++ ) {
				char ch = (char)bytes[offset + i];

				if( ch == ' ' )
					cSpaces++;
				else if( !HttpEncoderUtility.IsUrlSafeChar( ch ) )
					cUnsafe++;
			}

			// nothing to expand? 
			if( cSpaces == 0 && cUnsafe == 0 )
				return bytes;

			// expand not 'safe' characters into %XX, spaces to +s
			byte[] expandedBytes = new byte[count + cUnsafe * 2];
			int pos = 0;

			for( int i = 0; i < count; i++ ) {
				byte b = bytes[offset + i];
				char ch = (char)b;

				if( HttpEncoderUtility.IsUrlSafeChar( ch ) ) {
					expandedBytes[pos++] = b;
				} else if( ch == ' ' ) {
					expandedBytes[pos++] = (byte)'+';
				} else {
					expandedBytes[pos++] = (byte)'%';
					expandedBytes[pos++] = (byte)HttpEncoderUtility.IntToHex( ( b >> 4 ) & 0xf );
					expandedBytes[pos++] = (byte)HttpEncoderUtility.IntToHex( b & 0x0f );
				}
			}

			return expandedBytes;

		}
        /// <summary>
		/// Encodes a URL string. These method overloads can be used to encode the entire URL, including query-string values.
		/// </summary>
		/// <remarks>
		/// (c) Microsoft Corporation 2013. Code ported from .NET 4.5 4.5.50709.0.
		/// </remarks>
		/// <param name="bytes"></param>
		/// <returns></returns>
		public static string UrlEncode( byte[] bytes ) {
			if( bytes == null )
				return null;
			byte[] output = UrlEncode( bytes, 0, bytes.Length );
			return Encoding.UTF8.GetString( output, 0, output.Length );
		}
        /// <summary>
		/// Encodes a URL string. These method overloads can be used to encode the entire URL, including query-string values.
		/// </summary>
		/// <remarks>
		/// (c) Microsoft Corporation 2013. Code ported from .NET 4.5 4.5.50709.0.
		/// </remarks>
		/// <param name="bytes"></param>
		/// <returns></returns>
		public static string UrlEncode( string str ) {
			if( str == null )
				return null;
			byte[] bytes = Encoding.UTF8.GetBytes( str );
			byte[] output = UrlEncode( bytes, 0, bytes.Length );
			return Encoding.UTF8.GetString( output, 0, output.Length );
		}
}

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