Winform using Thoughtworks.qrcode to generate two-dimensional code, and save as a two-dimensional code image (limit size)

The first step: Download ThoughtWorks.QRCode.dll to the project Bin directory, and then right-click the project to add references;

Second Step interface code:

  #region the code generated by the Windows Forms Designer///<summary>///designer supports the required method-do not use the Code Editor to modify the contents of this method. </summary> private void InitializeComponent () {this.groupbox1 = new System.Windows.For Ms.            GroupBox ();            This.textbox1 = new System.Windows.Forms.TextBox ();            This.button1 = new System.Windows.Forms.Button ();            This.button2 = new System.Windows.Forms.Button ();            This.label1 = new System.Windows.Forms.Label ();            This.textbox2 = new System.Windows.Forms.TextBox ();            This.picturebox1 = new System.Windows.Forms.PictureBox ();            This.groupBox1.SuspendLayout (); ((System.ComponentModel.ISupportInitialize) (This.picturebox1)).            BeginInit (); This.            SuspendLayout ();            GroupBox1//THIS.GROUPBOX1.CONTROLS.ADD (THIS.TEXTBOX1); This.groupBox1.Font = new System.Drawing.Font ("Arial", 10F, System.Drawing.FontStyle.ReguLar, System.Drawing.GraphicsUnit.Point, ((byte) (134));            This.groupBox1.Location = new System.Drawing.Point (0, 13);            This.groupBox1.Name = "GroupBox1";            This.groupBox1.Size = new System.Drawing.Size (462, 84);            This.groupBox1.TabIndex = 0;            This.groupBox1.TabStop = false;            This.groupBox1.Text = "Product Address";            TextBox1//this.textBox1.Location = new System.Drawing.Point (6, 23);            This.textBox1.Multiline = true;            This.textBox1.Name = "TextBox1";            This.textBox1.Size = new System.Drawing.Size (429, 44);            This.textBox1.TabIndex = 0; Button1//This.button1.Font = new System.Drawing.Font ("Arial", 10F, System.Drawing.            Fontstyle.regular, System.Drawing.GraphicsUnit.Point, ((byte) (134));            This.button1.Location = new System.Drawing.Point (13, 225);         This.button1.Name = "Button1";   This.button1.Size = new System.Drawing.Size (89, 38);            This.button1.TabIndex = 2;            This.button1.Text = "Generate two-dimensional code";            This.button1.UseVisualStyleBackColor = true;            This.button1.Click + = new System.EventHandler (This.button1_click); Button2//This.button2.Font = new System.Drawing.Font ("Arial", 10F, System.Drawing.            Fontstyle.regular, System.Drawing.GraphicsUnit.Point, ((byte) (134));            This.button2.Location = new System.Drawing.Point (127, 225);            This.button2.Name = "Button2";            This.button2.Size = new System.Drawing.Size (89, 37);            This.button2.TabIndex = 3;            This.button2.Text = "Download QR code";            This.button2.UseVisualStyleBackColor = true;            This.button2.Click + = new System.EventHandler (This.button2_click);            Label1//this.label1.AutoSize = true; This.label1.Font = new System.Drawing.Font ("Arial", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte) (134)));            This.label1.Location = new System.Drawing.Point (13, 118);            This.label1.Name = "Label1";            This.label1.Size = new System.Drawing.Size (77, 14);            This.label1.TabIndex = 4;            This.label1.Text = "Product Name:"; TextBox2//This.textBox2.Font = new System.Drawing.Font ("Arial", 12F, System.drawin            G.fontstyle.regular, System.Drawing.GraphicsUnit.Point, ((byte) (134));            This.textBox2.Location = new System.Drawing.Point (16, 149);            This.textBox2.Multiline = true;            This.textBox2.Name = "TextBox2";            This.textBox2.Size = new System.Drawing.Size (220, 43);            This.textBox2.TabIndex = 5; PictureBox1//This.pictureBox1.Image = global::qrbarcode.properties.resources.a3            FE94FC_F4E0_4F23_B3DA_BAEAB3412AB01; ThIs.pictureBox1.Location = new System.Drawing.Point (261, 118);            This.pictureBox1.Name = "PictureBox1";            This.pictureBox1.Size = new System.Drawing.Size (156, 145);            This.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;            This.pictureBox1.TabIndex = 6;            This.pictureBox1.TabStop = false; Form1//this.            Autoscaledimensions = new System.Drawing.SizeF (6F, 12F); This.            AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; This.            ClientSize = new System.Drawing.Size (444, 306); This.            Controls.Add (This.picturebox1); This.            Controls.Add (THIS.TEXTBOX2); This.            Controls.Add (THIS.LABEL1); This.            Controls.Add (This.button2); This.            Controls.Add (This.button1); This.            Controls.Add (This.groupbox1); This. Font = new System.Drawing.Font ("Arial", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GrAphicsunit.point, ((byte) (134))); This.            Name = "Form1"; This.            Text = "Library Buy international two-dimensional code image generation"; This. Load + = new System.EventHandler (this.            Form1_Load);            This.groupBox1.ResumeLayout (FALSE);            This.groupBox1.PerformLayout (); ((System.ComponentModel.ISupportInitialize) (This.picturebox1)).            EndInit (); This.            ResumeLayout (FALSE); This.        PerformLayout ();        } #endregion private System.Windows.Forms.GroupBox groupBox1;        Private System.Windows.Forms.TextBox TextBox1;        Private System.Windows.Forms.Button button1;        Private System.Windows.Forms.Button button2;        Private System.Windows.Forms.Label Label1;        Private System.Windows.Forms.TextBox TextBox2; Private System.Windows.Forms.PictureBox PictureBox1;

The third step backstage code:

Using ThoughtWorks.QRCode.Codec; Reference

  private void Button1_Click (object sender, EventArgs e) {ThoughtWorks.QRCode.Codec.QRCodeEncoder Barco            de = new Qrcodeencoder (); Barcode. Qrcodeencodemode = Qrcodeencoder.encode_mode. byte;//encoding Method (Note: Byte can support Chinese, alpha_numeric scan out is the number) barcode. Qrcodescale = 4;//size (the larger the value is, the higher the image pixel of the two-dimensional code generated) barcode. Qrcodeversion = 0;//Version (note: setting to 0 is primarily to prevent an error when the encoded string is too long) try {barcode. Qrcodeerrorcorrect = qrcodeencoder.error_correction.                m;//error validation, error correction (with 4 ratings) String Qrdata = TextBox1.Text.Trim (); System.Drawing.Bitmap BP = barcode. Encode (Qrdata.               ToString (), encoding.getencoding ("GB2312"));                Image image = BP;            pictureBox1.Image = BP;            } catch//This exception handler is placed in the input content too many causes an array overflow exception {MessageBox.Show ("Build failed, click Regenerate."); }} private void Button2_Click (object sender, EventArgs e) {if (!string. IsnullorEmpty (TextBox2.Text)) {SaveFileDialog SF = new SaveFileDialog (); sf.                Title = "Choose Save File Location"; sf.                Filter = "Save Picture (*.jpg) |*.jpg| All Files (*. *) |*.*"; Sets the default file type display order SF.                FilterIndex = 1; Set file name: SF.                FileName = TextBox2.Text + ". jpg"; Saves the dialog box to remember the last Open Directory SF.                Restoredirectory = true; if (SF. ShowDialog () = = DialogResult.OK) {//Get file path string localfilepath = SF .                    Filename.tostring (); if (SF. FileName = "") {string filenameext = localfilepath.substring (localfilepath.las Tindexof ("\ \") + 1);//Gets the file name without the path string FilePath = localfilepath.substring (0, Localfilepath.lastind  Exof (".")); Gets the file path, with file name, with no suffix//string fn = sf.                        FileName; Image img = new Bitmap (this.pictureBox1.Image, 60, 60);//Save as Picture size limit img.                        Save (FilePath + ". jpg", System.Drawing.Imaging.ImageFormat.Jpeg);                     MessageBox.Show ("saved successfully");            }}} else {MessageBox.Show ("Please enter product name"); return; }        }

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Two-dimensional code effect generated after entering address

Save as two-dimensional code

Winform using Thoughtworks.qrcode to generate two-dimensional code, and save as a two-dimensional code image (limit size)