C#调用系统默认打印机打印文字和图片

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 documentswitch (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;}}}}