ArrayList to List Conversion

ArrayList To List

List newList = new List(arrayList.ToArray(typeof(int)));
List newList = new List(arrayList.ToArray(typeof(string)));

Image to Byte Array and Byte Array to Image

http://www.codeproject.com/KB/recipes/ImageConverter.aspx

 
public byte[] imageToByteArray(System.Drawing.Image imageIn)
{
 MemoryStream ms = new MemoryStream();
 imageIn.Save(ms,System.Drawing.Imaging.ImageFormat.Gif);
 return  ms.ToArray();
}

public Image byteArrayToImage(byte[] byteArrayIn)
{
     MemoryStream ms = new MemoryStream(byteArrayIn);
     Image returnImage = Image.FromStream(ms);
     return returnImage;
}

byte array to bitmap

http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/e57f7731-c703-4c17-b1a2-32b155f9b745

 
    public static Bitmap BytesToBitmap(byte[] byteArray)
   {
       using (MemoryStream ms = new MemoryStream(byteArray))
       {
           Bitmap img = (Bitmap)Image.FromStream(ms);
           return img;
       }
   }


TypeConverter tc = TypeDescriptor.GetConverter(typeof(Bitmap));

Bitmap bitmap1 = (Bitmap)tc.ConvertFrom(byteArray);

Or,



ImageConverter ic = new ImageConverter();

Image img = (Image)ic.ConvertFrom(byteArray);

Bitmap bitmap1 = new Bitmap(img);

Char to String to Byte Conversion

     
   // C# to convert a string to a char array.
    static public char[] convertStringToCharArray(string str)
    {
        return str.ToCharArray();
    }

    // C# to convert a string to a byte array.
    static public byte[] convertStringToByteArray(string str)
    {
        byte[] arrByte = new byte[str.ToCharArray().Length];
        int i = 0;
        foreach (char ch in str.ToCharArray())
        {
            arrByte[i] = (byte)ch;
            i++;
        }
        return arrByte;
    }

    // C# to convert a string to a byte array.
    public static byte[] convertStringToByteArray1(string str)
    {
        //http://geekswithblogs.net/waynerds/archive/2006/01/16/66056.aspx
        System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
        return encoding.GetBytes(str);
    }


    // C# to convert a string to a byte array.
    public static byte[] convertStringToByteArray2(string str)
    {
        //http://pankajkm.blogspot.com/2007/02/convert-string-to-byte-array-and-vice.html
        return (new System.Text.UnicodeEncoding()).GetBytes(str);
    }

    // C# to convert a char array to a byte array.
    static public byte[] convertCharArrayToByteArray(char[] ca)
    {
        byte[] arrByte = new byte[ca.Length];
        int i = 0;
        foreach (char ch in ca)
        {
            arrByte[i] = (byte)ch;
            i++;
        }
        return arrByte;
    }

    // C# to convert a char array to a string.
    static public string convertCharArrayToString(char[] ca)
    {
        string str;
        str = ca.ToString(); //Or
        str = new string(ca);
        return str;
    }

    // C# to convert a byte array to a char array.
    static public char[] convertByteArrayToCharArray(byte[] by)
    {
        //byte[] by = { 0x01, 0x02, 0x03 };
        char[] chararray = new char[by.Length];
        Array.Copy(by, chararray, by.Length);
        return chararray;
    }



    // C# Convert a byte array to a string
    public static string ConvertByteArrayToString(byte[] byteArray)
    {
        //http://geekswithblogs.net/waynerds/archive/2006/01/16/66056.aspx
        byte[] dBytes = byteArray;
        System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
        string str = enc.GetString(dBytes);
        return str;
    }

    // C# Convert a byte array to a string
    public static string ConvertByteArrayToString1(byte[] byteArray)
    {
        //http://pankajkm.blogspot.com/2007/02/convert-string-to-byte-array-and-vice.html
        return (new System.Text.UnicodeEncoding()).GetString(byteArray);
    }

    // C# Convert a byte array to a string
    public static string ConvertByteArrayToString2()
    {
        System.Net.WebClient webdata = new System.Net.WebClient();
        const string sampleurl = "http://www.sampleurl.com/default.htm";

        //the below statement assigns byte[]  
        byte[] byteArray = webdata.DownloadData(sampleurl);

        //the below code converts byte[] type string type  
        string txt = System.Text.Encoding.GetEncoding("utf-8").GetString(byteArray);
        return txt;
    }