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這期內容當中小編將會給大家帶來有關C#中怎么實現打印功能,文章內容豐富且以專業的角度為大家分析和敘述,閱讀完這篇文章希望大家可以有所收獲。
C#實現打印功能具體的操作步驟如下:
創建一個PrintDialog的實例。如下:
System.Windows.Forms.PrintDialog PrintDialog1=new PrintDialog ();
創建一個PrintDocument的實例.如下:
System.Drawing.Printing.PrintDocument docToPrint = new System.Drawing.Printing.PrintDocument();
設置打印機開始打印的事件處理函數.函數原形如下:
void docToPrint_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
將事件處理函數添加到PrintDocument的PrintPage事件中。
docToPrint.PrintPage+= new PrintPageEventHandler(docToPrint_PrintPage);
設置PrintDocument的相關屬性,如:
PrintDialog1.AllowSomePages = true;PrintDialog1.ShowHelp = true;
把PrintDialog的Document屬性設為上面配置好的PrintDocument的實例:
PrintDialog1.Document = docToPrint;
調用PrintDialog的ShowDialog函數顯示打印對話框:
DialogResult result = PrintDialog1.ShowDialog();
根據用戶的選擇,開始打印:
if (result==DialogResult.OK) { docToPrint.Print(); }
C#實現打印功能的實例如下:
使用時先創建PrintService類的實例,然后調用void StartPrint(Stream streamToPrint,string streamType)函數開始打印。其中streamToPrint是要打印的內容(字節流),streamType是流的類型(txt表示普通文本,image表示圖像);
using System; using System.Drawing.Printing; using System.Windows.Forms; using System.IO; namespace EDImageSystem { /// <summary> /// PrintService 的摘要說明。 /// </summary> public class PrintService { public PrintService() { // // TODO: 在此處添加構造函數邏輯 // this.docToPrint.PrintPage+= new PrintPageEventHandler(docToPrint_PrintPage); }//將事件處理函數添加到PrintDocument的PrintPage中 // Declare the PrintDocument object. private System.Drawing.Printing.PrintDocument docToPrint = new System.Drawing.Printing.PrintDocument(); //創建一個PrintDocument的實例 private System.IO.Stream streamToPrint; string streamType; // This method will set properties on the PrintDialog object and // then display the dialog. public void StartPrint(Stream streamToPrint,string streamType) { this.streamToPrint=streamToPrint; this.streamType=streamType; // Allow the user to choose the page range he or she would // like to print. System.Windows.Forms.PrintDialog PrintDialog1= new PrintDialog ();//實現C#打印之創建一個PrintDialog的實例。 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屬性設為上面配置好的PrintDocument的實例 DialogResult result = PrintDialog1.ShowDialog(); //調用PrintDialog的ShowDialog函數顯示打印對話框 // If the result is OK then print the document. if (result==DialogResult.OK) { docToPrint.Print();//實現C#打印之開始打印 } } // The PrintDialog will print the document // by handling the document's PrintPage event. private void docToPrint_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e) //設置打印機開始打印的事件處理函數 { // 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. System.IO.StreamReader streamReader= new StreamReader(this.streamToPrint); text=streamReader.ReadToEnd(); e.Graphics.DrawString(text,printFont, System.Drawing.Brushes.Black,e.MarginBounds.X,e.MarginBounds.Y); break; case "image": System.Drawing.Image image= System.Drawing.Image.FromStream(this.streamToPrint); 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; } } } }
上述就是小編為大家分享的C#中怎么實現打印功能了,如果剛好有類似的疑惑,不妨參照上述分析進行理解。如果想知道更多相關知識,歡迎關注億速云行業資訊頻道。
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