private void button1_Click(object sender, EventArgs e) { // Displays a SaveFileDialog so the user can save the Image SaveFileDialog saveFileDialog1 = new SaveFileDialog(); saveFileDialog1.Filter = "Bitmap Image|*.bmp|PNG Image|*.png|JPeg Image|*.jpg|Gif Image|*.gif"; saveFileDialog1.Title = "Save an Image File"; saveFileDialog1.ShowDialog(); // If the file name is not an empty string open it for saving. if (saveFileDialog1.FileName != "") { // Saves the Image via a FileStream created by the OpenFile method. using (FileStream fs = (System.IO.FileStream)saveFileDialog1.OpenFile()) { // Saves the Image in the appropriate ImageFormat based upon the // File type selected in the dialog box. // NOTE that the FilterIndex property is one-based. ImageFormat imageFormat = null; switch (saveFileDialog1.FilterIndex) { case 1: imageFormat = ImageFormat.Bmp; break; case 2: imageFormat = ImageFormat.Png; break; case 3: imageFormat = ImageFormat.Jpeg; break; case 4: imageFormat = ImageFormat.Gif; break; default: throw new NotSupportedException("File extension is not supported"); } string level = "L"; QRCodeGenerator.ECCLevel eccLevel = (QRCodeGenerator.ECCLevel)(level == "L" ? 0 : level == "M" ? 1 : level == "Q" ? 2 : 3); using (QRCodeGenerator qrGenerator = new QRCodeGenerator()) { using (QRCodeData qrCodeData = qrGenerator.CreateQrCode(/* Custom domain change*/ "bit.ly?" + textBoxQRCode.Text, eccLevel)) { using (QRCode qrCode = new QRCode(qrCodeData)) { Image tase = qrCode.GetGraphicQR(20, Color.Black, Color.White, this.comboBox1.SelectedIndex, null, (int)1); Bitmap l = (Bitmap)tase; l = Transparent2Color(l, Color.FromArgb(255, 255, 255)); Image la = (Image)l; la.Save(fs, imageFormat); } } } fs.Close(); return; } } }