C#调用系统默认打印机打印文字和图片 |
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本方法适用于有打印驱动的打印机打印。直接用电脑默认打印机进行打印文字和图片。 首先安装打印机驱动，然后在设备和打印机中将要用的打印机设为默认打印机，然后调用该方法即可 Pulic Void Print() { PrintService ps = new PrintService(); ps.StartPrint("33333","txt");//打印文字 ps.StartPrint(Image.FromFile(Application.StartupPath+"\\2.jpeg"), "image");//打印图片 }PrintService类源码 using System; using System.Collections.Generic; using System.Drawing; using System.Drawing.Printing; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace 系统打印demo { public class PrintService { public PrintService() { // // TODO: 在此处添加构造函数逻辑 // this.docToPrint.PrintPage += new PrintPageEventHandler(docToPrint_PrintPage); }//将事件处理函数添加到PrintDocument的PrintPage中 // Declare the PrintDocument object. private System.Drawing.Printing.PrintDocument docToPrint = new System.Drawing.Printing.PrintDocument();//创建一个PrintDocument的实例 private string streamType; private string streamtxt; private Image streamima; // This method will set properties on the PrintDialog object and // then display the dialog. public void StartPrint(string txt, string streamType) { this.streamType = streamType; this.streamtxt = txt; // Allow the user to choose the page range he or she would // like to print. System.Windows.Forms.PrintDialog PrintDialog1 = new PrintDialog();//创建一个PrintDialog的实例。 PrintDialog1.AllowSomePages = true; // Show the help button. PrintDialog1.ShowHelp = true; // Set the Document property to the PrintDocument for // which the PrintPage Event has been handled. To display the // dialog, either this property or the PrinterSettings property // must be set PrintDialog1.Document = docToPrint;//把PrintDialog的Document属性设为上面配置好的PrintDocument的实例 DialogResult result = PrintDialog1.ShowDialog();//调用PrintDialog的ShowDialog函数显示打印对话框,如果不要注释即可，直接调用docToPrint.Print() // If the result is OK then print the document. if (result == DialogResult.OK) { docToPrint.Print();//开始打印 } } public void StartPrint(Image ima, string streamType) { this.streamType = streamType; this.streamima = ima; // Allow the user to choose the page range he or she would // like to print. System.Windows.Forms.PrintDialog PrintDialog1 = new PrintDialog();//创建一个PrintDialog的实例。 PrintDialog1.AllowSomePages = true; // Show the help button. PrintDialog1.ShowHelp = true; // Set the Document property to the PrintDocument for // which the PrintPage Event has been handled. To display the // dialog, either this property or the PrinterSettings property // must be set PrintDialog1.Document = docToPrint;//把PrintDialog的Document属性设为上面配置好的PrintDocument的实例 DialogResult result = PrintDialog1.ShowDialog();//调用PrintDialog的ShowDialog函数显示打印对话框,如果不要注释即可，直接调用docToPrint.Print() // If the result is OK then print the document. if (result == DialogResult.OK) { docToPrint.Print();//开始打印 } } // The PrintDialog will print the document // by handling the document's PrintPage event. private void docToPrint_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)//设置打印机开始打印的事件处理函数 { // Insert code to render the page here. // This code will be called when the control is drawn. // The following code will render a simple // message on the printed document switch (this.streamType) { case "txt": string text = null; System.Drawing.Font printFont = new System.Drawing.Font ("Arial", 35, System.Drawing.FontStyle.Regular); // Draw the content. text = streamtxt; e.Graphics.DrawString(text, printFont, System.Drawing.Brushes.Black, e.MarginBounds.X, e.MarginBounds.Y); break; case "image": System.Drawing.Image image = streamima; int x = e.MarginBounds.X; int y = e.MarginBounds.Y; int width = image.Width; int height = image.Height; if ((width / e.MarginBounds.Width) > (height / e.MarginBounds.Height)) { width = e.MarginBounds.Width; height = image.Height * e.MarginBounds.Width / image.Width; } else { height = e.MarginBounds.Height; width = image.Width * e.MarginBounds.Height / image.Height; } System.Drawing.Rectangle destRect = new System.Drawing.Rectangle(x, y, width, height); e.Graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, System.Drawing.GraphicsUnit.Pixel); break; default: break; } } } }
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