C # string byte[] Base64 commonly used to convert each other

Reference:

Http://www.cnblogs.com/zxx193/p/3605238.html?utm_source=tuicool

Http://www.cnblogs.com/freeliver54/p/3430956.html

Http://www.cnblogs.com/simhare/archive/2007/07/18/821938.html

Defines the string variable as str, the memory rheology is MS, and the bit array is BT

1. String = = array of bits

(1) byte[] Bt=system.text.encoding.default.getbytes ("string");(2) byte[] bt=convert.frombase64string ("string");

Add:

System.Text.Encoding.Unicode.GetBytes (str); System.Text.Encoding.UTF8.GetBytes (str); System.Text.Encoding.GetEncoding ("gb2312"). GetBytes (str); Specify the Encoding method

String str = "China?" Ss123? "; byte[] bytes = System.Text.Encoding.Default.GetBytes (str); GB2312 encoded Chinese characters accounted for 2 bytes, English letters accounted for 1 bytes bytes length 12string s = System.Text.Encoding.Default.GetString (new byte[] {bytes[0],bytes[1 ]});//decoded to "medium"

byte[] bytes = {98, 101, 102};  String str = System.Text.Encoding.ASCII.GetString (bytes); The result is: ABCDEF  ASCII Code table

2. Bit array = string

(1) string str=system.text.encoding.default.getstring (BT);(2) string str=convert.tobase64string (BT);

3. String = Flow

(1) MemoryStream ms=new MemoryStream (System.Text.Encoding.Default.GetBytes ("string"));(2) MemoryStream ms=new MemoryStream (Convert.frombase64string ("string"));

4. Stream = = string

(1) String str=convert.tobase64string (Ms. ToArray ());(2) string str=system.text.encoding.default.getstring (Ms. ToArray ());

5. Array of bits = flow

(1) MemoryStream ms=new MemoryStream (BT);(2) MemoryStream ms=new MemoryStream (); Ms. Read (BT,0,BT. Lenght);

6. Stream = array of bits

(1) byte[] Bt=ms. ToArray ();(2) MemoryStream ms=new MemoryStream (), Ms. Write (Bt,0,ms. Length);

7, byte[] and base64string of the mutual conversion

in C # picture to byte[] to base64string conversion: Bitmap BMP=NewBitmap (filepath); MemoryStream Ms=NewMemoryStream (); Bmp.                 Save (MS, SYSTEM.DRAWING.IMAGING.IMAGEFORMAT.GIF); byte[] arr =New byte[Ms.                 Length]; Ms. Position=0; Ms. Read (arr,0, (int) Ms.                 Length); Ms.             Close (); stringPic =convert.tobase64string (arr); Base64string to byte[] again to the conversion of the picture:byte[] Imagebytes =convert.frombase64string (pic); //read in MemoryStream objectMemoryStream MemoryStream =NewMemoryStream (Imagebytes,0, imagebytes.length); Memorystream.write (Imagebytes,0, imagebytes.length); //turn into a pictureImage image =Image.fromstream (MemoryStream); Now in the database development: The picture is generally stored in a CLOB: storage base64string BLOB: storage byte [] It is generally recommended to use byte[]. Because the picture can be converted directly to byte[] into the database, if you use base64string you also need to convert from byte[] to base64string. More wasted performance. 

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Conversion of C # byte array to image

Http://www.cnblogs.com/luxiaoxun/p/3378416.html

C # string byte[] Base64 commonly used to convert each other