C # picture and BASE64 code conversion to each other

　　　　　　

Picture converted    to Base64 encoded text

        private void Button1_Click (object sender, EventArgs e) {OpenFileDialog dlg = new OpenFileDialog            (); Dlg.            MultiSelect = true; Dlg.            Title = "Select the picture to convert"; Dlg. Filter = "Image files (*.jpg;*.bmp;*.gif;*.png) |*.jpg*.jpeg;*.gif;*.bmp|            Allfiles (* *) |*.* "; if (DialogResult.OK = = dlg. ShowDialog ()) {for (int i = 0; i < dlg. Filenames.length; i++) {imgtobase64string (dlg. Filenames[i].                ToString ());             }}}//Picture converted to Base64 encoded text private void imgtobase64string (string imagefilename) {                try {Bitmap bmp = new Bitmap (imagefilename);                This.pictureBox1.Image = BMP;                FileStream fs = new FileStream (Imagefilename + ". txt", filemode.create);                StreamWriter SW = new StreamWriter (FS);                MemoryStream ms = new MemoryStream (); Bmp. SAve (MS, System.Drawing.Imaging.ImageFormat.Jpeg); byte[] arr = new Byte[ms.                Length]; Ms.                Position = 0; Ms. Read (arr, 0, (int) Ms.                Length); Ms.                Close ();                String strbaser64 = convert.tobase64string (arr); Sw.                Write (STRBASER64); Sw.                Close (); Fs.               Close ();            MessageBox.Show ("Successful conversion!"); } catch (Exception ex) {MessageBox.Show ("imgtobase64string conversion failed \nexception:" + ex.            Message);            }}//base64 encoded text to image private void button2_click (object sender, EventArgs e) {            OpenFileDialog dlg = new OpenFileDialog (); Dlg.            MultiSelect = true; Dlg.            Title = "Select the Base64 encoded text to convert"; Dlg.            Filter = "txt files|*.txt"; if (DialogResult.OK = = dlg. ShowDialog ()) {for (int i = 0; i < dlg. Filenames.length;          i++) {          Base64stringtoimage (dlg. Filenames[i].                ToString ()); }}}//base64 encoded text to picture private void Base64stringtoimage (String Txtfi Lename) {try {FileStream ifs = new FileStream (Txtfilename, FileMode.Open, Fi                Leaccess.read);                StreamReader sr = new StreamReader (IFS); String inputstr = Sr.                ReadToEnd ();                byte[] arr = convert.frombase64string (INPUTSTR);                MemoryStream ms = new MemoryStream (arr);                Bitmap bmp = new Bitmap (MS); Bmp.                Save (Txtfilename + ". jpg", System.Drawing.Imaging.ImageFormat.Jpeg); Bmp.                Save (Txtfilename + ". bmp", imageformat.bmp); Bmp.                Save (Txtfilename + ". gif", imageformat.gif); Bmp.                Save (Txtfilename + ". png", imageformat.png); Ms.                Close (); Sr.                Close (); Ifs.                Close (); This.picturEbox2.image = BMP;                if (file.exists (Txtfilename)) {file.delete (txtfilename); }//messagebox.show ("Conversion succeeded!            "); } catch (Exception ex) {MessageBox.Show ("Base64stringtoimage conversion failed \nexception:" + ex.            Message); }        }

C # picture and BASE64 code conversion to each other