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【转】C# PrintDocument打印 多页 打印预览

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PrintDocument实例所有的订阅事件如下：

1.创建一个PrintDocument的实例.如下：

System.Drawing.Printing.PrintDocument docToPrint =

new System.Drawing.Printing.PrintDocument();

2.设置打印机开始打印的事件处理函数.函数原形如下：

void docToPrint_PrintPage(object sender,

System.Drawing.Printing.PrintPageEventArgs e)

3.将事件处理函数添加到PrintDocument的PrintPage事件中。

docToPrint.PrintPage+=new PrintPageEventHandler(docToPrint_PrintPage);

4.设置PrintDocument的相关属性，如：

PrintDialog1.AllowSomePages = true;PrintDialog1.ShowHelp = true;

5.把PrintDialog的Document属性设为上面配置好的PrintDocument的实例：

PrintDialog1.Document = docToPrint;

6.调用PrintDialog的ShowDialog函数显示打印对话框：

DialogResult result = PrintDialog1.ShowDialog();

7.根据用户的选择，开始打印：

if (result==DialogResult.OK)

{


docToPrint.Print();

}

8.打印预览控件PrintPreviewDialog

例子如下：







使用时先创建


PrintService


类的实例，然后调用


void StartPrint(Stream streamToPrint,string streamType)


函数开始打印。其中


streamToPrint


是要打印的内容（字节流），


streamType


是流的类型（


txt


表示普通文本，


image


表示图像）；


view source


print


?




public






partial






class




PrintTxt

{





private




PrintPreviewDialog PrintPreview =




new




PrintPreviewDialog();





private






string




StreamType;





private




Image image =




null




;





private




Stream StreamToPrint =




null




;



Font mainFont =




new




Font(



"宋体"



, 12);



//打印的字体





public






string




Filename =




null




;






//1、实例化打印文档



PrintDocument pdDocument =




new




PrintDocument();





private






string




[] lines;





private






int




linesPrinted;





public




PrintTxt(




string




filepath,




string




filetype)



{




Filename = Path.GetFileNameWithoutExtension(filepath);




//订阅BeginPrint事件



pdDocument.BeginPrint +=




new




PrintEventHandler(pdDocument_BeginPrint);




//訂閱EndPrint事件，释放资源





pdDocument.PrintPage +=




new




PrintPageEventHandler(OnPrintPage);




//订阅Print打印事件,该方法必须放在订阅打印事件的最后



FileStream fs =




new




FileStream(filepath, FileMode.Open, FileAccess.Read);



StartPrint(fs, filetype);




//打印结束



pdDocument.EndPrint +=




new




PrintEventHandler(pdDocument_EndPrint);



}




//2、启动Print打印方法





public






void




StartPrint(Stream streamToPrint,




string




streamType)



{




//返回值的PageSettings A4\A5



PageSettings ps =




new




PageSettings();




//显示设置打印页对话框



PageSetupDialog Psdl =




new




PageSetupDialog();




//打印多份设置，注意，该方法需放在printpage方法后面。



PrintDialog pt =




new




PrintDialog();



pt.AllowCurrentPage =




true




;



pt.AllowSomePages =




true




;



pt.AllowPrintToFile =




true




;



StreamToPrint = streamToPrint;



//打印的字节流



StreamType = streamType;



//打印的类型



pdDocument.DocumentName = Filename;



//打印的文件名



Psdl.Document = pdDocument;



PrintPreview.Document = pdDocument;



pt.Document = pdDocument;



Psdl.PageSettings = pdDocument.DefaultPageSettings;





try



{




//显示对话框





if




(Psdl.ShowDialog() == DialogResult.OK)



{



ps = Psdl.PageSettings;



pdDocument.DefaultPageSettings = Psdl.PageSettings;



}





if




(pt.ShowDialog() == DialogResult.OK)



{



pdDocument.PrinterSettings.Copies = pt.PrinterSettings.Copies;



pdDocument.Print();



}





if




(PrintPreview.ShowDialog()==DialogResult.OK )




//调用打印



pdDocument.Print();




* PrintDocument对象的Print()方法在PrintController类中执行PrintPage事件。



*/



}





catch




(InvalidPrinterException ex)



{



MessageBox.Show(ex.Message,



"Simple Editor"



, MessageBoxButtons.OK, MessageBoxIcon.Error);





throw




;



}



}




/// <summary>




/// 3、得到打印內容




/// 每个打印任务只调用OnBeginPrint()一次。




/// </summary>




/// <param name="sender"></param>




/// <param name="e"></param>





void




pdDocument_BeginPrint(




object




sender, PrintEventArgs e)



{





char




[] param = {



'\n'



};





char




[] trimParam = {



'\r'



};



//回车





switch




(StreamType)



{





case





"txt"



:



StringBuilder text =




new




StringBuilder();



System.IO.StreamReader streamReader =




new




StreamReader(StreamToPrint, Encoding.Default);





while




(streamReader.Peek() >= 0)



{



lines = streamReader.ReadToEnd().Split(param);





for




(




int




i = 0; i < lines.Length; i++)



{



lines[i] = lines[i].TrimEnd(trimParam);



}



}





break




;





case





"image"



:



image = System.Drawing.Image.FromStream(StreamToPrint);





break




;





default




:





break




;



}



}




/// <summary>




/// 4、绘制多个打印界面




/// printDocument的PrintPage事件




/// </summary>




/// <param name="sender"></param>




/// <param name="e"></param>





private






void




OnPrintPage(




object




sender, PrintPageEventArgs e)



{





int




leftMargin = Convert.ToInt32((e.MarginBounds.Left) * 3 / 4);



//左边距





int




topMargin = Convert.ToInt32(e.MarginBounds.Top * 2 / 3);



//顶边距





switch




(StreamType)



{





case





"txt"



:





while




(linesPrinted < lines.Length)



{




//向画布中填写内容



e.Graphics.DrawString(lines[linesPrinted++],




new




Font(



"Arial"



, 10), Brushes.Black, leftMargin, topMargin,




new




StringFormat());



topMargin += 55;



//行高为55，可调整




//走纸换页





if




(topMargin >= e.PageBounds.Height - 60)



//页面累加的高度大于页面高度。根据自己需要，可以适当调整



{




//如果大于设定的高



e.HasMorePages =




true




;




/*




* PrintPageEventArgs类的HaeMorePages属性为True时，通知控件器，必须再次調用OnPrintPage()方法，打印一个页面。




* PrintLoopI()有一个用於每个要打印的页面的序例。如果HasMorePages是False，PrintLoop()就会停止。




*/





return




;



}



}





break




;





case





"image"



:



//一下涉及剪切图片,





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(topMargin, leftMargin, width, height);




//向画布写入图片





for




(




int




i = 0; i < Convert.ToInt32(Math.Floor((




double




)image.Height/ 820)) + 1; i++)



{




e.Graphics.DrawImage(image, destRect, i*820,i*1170 , image.Width, image.Height, System.Drawing.GraphicsUnit.Pixel);




//走纸换页





if




(i * 1170 >= e.PageBounds.Height - 60)



//页面累加的高度大于页面高度。根据自己需要，可以适当调整



{




//如果大于设定的高



e.HasMorePages =




true




;




/*




* PrintPageEventArgs类的HaeMorePages属性为True时，通知控件器，必须再次調用OnPrintPage()方法，打印一个页面。




* PrintLoopI()有一个用於每个要打印的页面的序例。如果HasMorePages是False，PrintLoop()就会停止。




*/





return




;



}



}






break




;



}




//打印完毕后，画线条，且注明打印日期



e.Graphics.DrawLine(




new




Pen(Color.Black), leftMargin, topMargin, e.MarginBounds.Right, topMargin);





string




strdatetime = DateTime.Now.ToLongDateString() + DateTime.Now.ToLongTimeString();



e.Graphics.DrawString(




string




.Format(



"打印时间：{0}"



, strdatetime), mainFont, Brushes.Black, e.MarginBounds.Right-240, topMargin+40,




new




StringFormat());



linesPrinted = 0;




//绘制完成后，关闭多页打印功能



e.HasMorePages =




false




;



}




/// <summary>




///5、EndPrint事件,释放资源




/// </summary>




/// <param name="sender"></param>




/// <param name="e"></param>





void




pdDocument_EndPrint(




object




sender, PrintEventArgs e)



{




//变量Lines占用和引用的字符串数组，现在释放



lines =




null




;



}


}


//PrintTxt simple = new PrintTxt("D:\\Mainsoft\\12.txt", "txt");

转载于:https://www.cnblogs.com/vic_lu/archive/2011/07/27/2118254.html