blocks|key|605513|text|传递给DrawImage方法的参数应该是您希望在纸上显示的图像的大小，而不是图像本身的大小，然后DrawImage命令将为您处理缩放。最简单的方法可能是使用下面的DrawImage命令覆盖。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|605514|args.Graphics.DrawImage(i,+args.MarginBounds);|code-block|syntax|javascript|605515|注意:如果图像的比例与矩形不同，这将使图像倾斜。通过对图像大小和纸张大小进行一些简单的数学运算，您可以在不扭曲图像的情况下创建一个适合纸张边界的新矩形。|605516|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

The parameters that you are passing into the DrawImage method should be the size you want the image on the paper rather than the size of the image itself, the DrawImage command will then take care of the scaling for you. Probably the easiest way is to use the following override of the DrawImage command.

<pre><code>args.Graphics.DrawImage(i, args.MarginBounds);
</code></pre>

Note: This will skew the image if the proportions of the image are not the same as the rectangle. Some simple math on the size of the image and paper size will allow you to create a new rectangle that fits in the bounds of the paper without skewing the image.

blocks|key|389548|text|我不想践踏BBoy已经不错的答案，但我已经完成了保持纵横比的代码。我接受了他的建议，所以他应该在这里得到部分学分！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|389549|PrintDocument+pd+=+new+PrintDocument();
pd.DefaultPageSettings.PrinterSettings.PrinterName+=+"Printer+Name";
pd.DefaultPageSettings.Landscape+=+true;+//or+false!
pd.PrintPage+%2B=+(sender,+args)+=>
{
++++Image+i+=+Image.FromFile(@"C:\...\...\image.jpg");
++++Rectangle+m+=+args.MarginBounds;

++++if+((double)i.Width+/+(double)i.Height+>+(double)m.Width+/+(double)m.Height)+//+image+is+wider
++++{
++++++++m.Height+=+(int)((double)i.Height+/+(double)i.Width+*+(double)m.Width);
++++}
++++else
++++{
++++++++m.Width+=+(int)((double)i.Width+/+(double)i.Height+*+(double)m.Height);
++++}
++++args.Graphics.DrawImage(i,+m);
};
pd.Print();|code-block|syntax|javascript|389550|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Not to trample on BBoy's already decent answer, but I've done the code that maintains aspect ratio. I took his suggestion, so he should get partial credit here!

<pre><code>PrintDocument pd = new PrintDocument();
pd.DefaultPageSettings.PrinterSettings.PrinterName = "Printer Name";
pd.DefaultPageSettings.Landscape = true; //or false!
pd.PrintPage += (sender, args) =&gt;
{
 Image i = Image.FromFile(@"C:\...\...\image.jpg");
 Rectangle m = args.MarginBounds;

 if ((double)i.Width / (double)i.Height &gt; (double)m.Width / (double)m.Height) // image is wider
 {
 m.Height = (int)((double)i.Height / (double)i.Width * (double)m.Width);
 }
 else
 {
 m.Width = (int)((double)i.Width / (double)i.Height * (double)m.Height);
 }
 args.Graphics.DrawImage(i, m);
};
pd.Print();
</code></pre>

blocks|key|605594|text|答案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|605595|public+void+Print(string+FileName)
{
++++StringBuilder+logMessage+=+new+StringBuilder();
++++logMessage.AppendLine(string.Format(CultureInfo.InvariantCulture,+"-------------------[+START+-+{0}+-+{1}+-------------------]",+MethodBase.GetCurrentMethod(),+DateTime.Now.ToShortDateString()));
++++logMessage.AppendLine(string.Format(CultureInfo.InvariantCulture,+"Parameter:+1:+[Name+-+{0},+Value+-+{1}",+"None]",+Convert.ToString("")));

++++try
++++{
++++++++if+(string.IsNullOrWhiteSpace(FileName))+return;+//+Prevents+execution+of+below+statements+if+filename+is+not+selected.

++++++++PrintDocument+pd+=+new+PrintDocument();

++++++++//Disable+the+printing+document+pop-up+dialog+shown+during+printing.
++++++++PrintController+printController+=+new+StandardPrintController();
++++++++pd.PrintController+=+printController;

++++++++//For+testing+only:+Hardcoded+set+paper+size+to+particular+paper.
++++++++//pd.PrinterSettings.DefaultPageSettings.PaperSize+=+new+PaperSize("Custom+6x4",+720,+478);
++++++++//pd.DefaultPageSettings.PaperSize+=+new+PaperSize("Custom+6x4",+720,+478);

++++++++pd.DefaultPageSettings.Margins+=+new+Margins(0,+0,+0,+0);
++++++++pd.PrinterSettings.DefaultPageSettings.Margins+=+new+Margins(0,+0,+0,+0);

++++++++pd.PrintPage+%2B=+(sndr,+args)+=>
++++++++{
++++++++++++System.Drawing.Image+i+=+System.Drawing.Image.FromFile(FileName);

++++++++++++//Adjust+the+size+of+the+image+to+the+page+to+print+the+full+image+without+loosing+any+part+of+the+image.
++++++++++++System.Drawing.Rectangle+m+=+args.MarginBounds;

++++++++++++//Logic+below+maintains+Aspect+Ratio.
++++++++++++if+((double)i.Width+/+(double)i.Height+>+(double)m.Width+/+(double)m.Height)+//+image+is+wider
++++++++++++{
++++++++++++++++m.Height+=+(int)((double)i.Height+/+(double)i.Width+*+(double)m.Width);
++++++++++++}
++++++++++++else
++++++++++++{
++++++++++++++++m.Width+=+(int)((double)i.Width+/+(double)i.Height+*+(double)m.Height);
++++++++++++}
++++++++++++//Calculating+optimal+orientation.
++++++++++++pd.DefaultPageSettings.Landscape+=+m.Width+>+m.Height;
++++++++++++//Putting+image+in+center+of+page.
++++++++++++m.Y+=+(int)((((System.Drawing.Printing.PrintDocument)(sndr)).DefaultPageSettings.PaperSize.Height+-+m.Height)+/+2);
++++++++++++m.X+=+(int)((((System.Drawing.Printing.PrintDocument)(sndr)).DefaultPageSettings.PaperSize.Width+-+m.Width)+/+2);
++++++++++++args.Graphics.DrawImage(i,+m);
++++++++};
++++++++pd.Print();
++++}
++++catch+(Exception+ex)
++++{
++++++++log.ErrorFormat("Error+:+{0}\n+By+:+{1}-{2}",+ex.ToString(),+this.GetType(),+MethodBase.GetCurrentMethod().Name);
++++}
++++finally
++++{
++++++++logMessage.AppendLine(string.Format(CultureInfo.InvariantCulture,+"-------------------[+END++-+{0}+-+{1}+-------------------]",+MethodBase.GetCurrentMethod().Name,+DateTime.Now.ToShortDateString()));
++++++++log.Info(logMessage.ToString());
++++}
}|code-block|syntax|javascript|605596|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Answer:

<pre><code>public void Print(string FileName)
{
 StringBuilder logMessage = new StringBuilder();
 logMessage.AppendLine(string.Format(CultureInfo.InvariantCulture, "-------------------[ START - {0} - {1} -------------------]", MethodBase.GetCurrentMethod(), DateTime.Now.ToShortDateString()));
 logMessage.AppendLine(string.Format(CultureInfo.InvariantCulture, "Parameter: 1: [Name - {0}, Value - {1}", "None]", Convert.ToString("")));

 try
 {
 if (string.IsNullOrWhiteSpace(FileName)) return; // Prevents execution of below statements if filename is not selected.

 PrintDocument pd = new PrintDocument();

 //Disable the printing document pop-up dialog shown during printing.
 PrintController printController = new StandardPrintController();
 pd.PrintController = printController;

 //For testing only: Hardcoded set paper size to particular paper.
 //pd.PrinterSettings.DefaultPageSettings.PaperSize = new PaperSize("Custom 6x4", 720, 478);
 //pd.DefaultPageSettings.PaperSize = new PaperSize("Custom 6x4", 720, 478);

 pd.DefaultPageSettings.Margins = new Margins(0, 0, 0, 0);
 pd.PrinterSettings.DefaultPageSettings.Margins = new Margins(0, 0, 0, 0);

 pd.PrintPage += (sndr, args) =&gt;
 {
 System.Drawing.Image i = System.Drawing.Image.FromFile(FileName);

 //Adjust the size of the image to the page to print the full image without loosing any part of the image.
 System.Drawing.Rectangle m = args.MarginBounds;

 //Logic below maintains Aspect Ratio.
 if ((double)i.Width / (double)i.Height &gt; (double)m.Width / (double)m.Height) // image is wider
 {
 m.Height = (int)((double)i.Height / (double)i.Width * (double)m.Width);
 }
 else
 {
 m.Width = (int)((double)i.Width / (double)i.Height * (double)m.Height);
 }
 //Calculating optimal orientation.
 pd.DefaultPageSettings.Landscape = m.Width &gt; m.Height;
 //Putting image in center of page.
 m.Y = (int)((((System.Drawing.Printing.PrintDocument)(sndr)).DefaultPageSettings.PaperSize.Height - m.Height) / 2);
 m.X = (int)((((System.Drawing.Printing.PrintDocument)(sndr)).DefaultPageSettings.PaperSize.Width - m.Width) / 2);
 args.Graphics.DrawImage(i, m);
 };
 pd.Print();
 }
 catch (Exception ex)
 {
 log.ErrorFormat("Error : {0}\n By : {1}-{2}", ex.ToString(), this.GetType(), MethodBase.GetCurrentMethod().Name);
 }
 finally
 {
 logMessage.AppendLine(string.Format(CultureInfo.InvariantCulture, "-------------------[ END - {0} - {1} -------------------]", MethodBase.GetCurrentMethod().Name, DateTime.Now.ToShortDateString()));
 log.Info(logMessage.ToString());
 }
}
</code></pre>

blocks|key|605683|text|BBoy提供的解决方案运行良好。但在我的例子中，我不得不使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|605684|e.Graphics.DrawImage(memoryImage,+e.PageBounds);|code-block|syntax|javascript|605685|这将仅打印表单。当我使用MarginBounds时，即使窗体比显示器屏幕小，它也会打印整个屏幕。PageBounds解决了这个问题。感谢BBoy！|605686|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

The solution provided by BBoy works fine. But in my case I had to use 

<pre><code>e.Graphics.DrawImage(memoryImage, e.PageBounds);
</code></pre>

This will print only the form. When I use MarginBounds it prints the entire screen even if the form is smaller than the monitor screen. PageBounds solved that issue. Thanks to BBoy!

blocks|key|389703|text|同意TonyM和BBoy+-这是标签原始4*6打印的正确答案。(args.PageBounds)。这对我打印Endicia+API服务运输标签很有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|389704|private+void+SubmitResponseToPrinter(ILabelRequestResponse+response)
++++{
++++++++PrintDocument+pd+=+new+PrintDocument();
++++++++pd.PrintPage+%2B=+(sender,+args)+=>
++++++++{
++++++++++++Image+i+=+Image.FromFile(response.Labels[0].FullPathFileName.Trim());
++++++++++++args.Graphics.DrawImage(i,+args.PageBounds);
++++++++};
++++++++pd.Print();
++++}|code-block|syntax|javascript|389705|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Agree with TonyM and BBoy - this is the correct answer for original 4*6 printing of label. (args.PageBounds). This worked for me for printing Endicia API service shipping Labels.

<pre><code>private void SubmitResponseToPrinter(ILabelRequestResponse response)
 {
 PrintDocument pd = new PrintDocument();
 pd.PrintPage += (sender, args) =&gt;
 {
 Image i = Image.FromFile(response.Labels[0].FullPathFileName.Trim());
 args.Graphics.DrawImage(i, args.PageBounds);
 };
 pd.Print();
 }
</code></pre>

blocks|key|389765|text|所有这些答案都有一个问题，那就是总是将图像拉伸到页面大小，并在尝试时切断一些内容。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|389766|找到了更简单的方法。|389767|我自己的解决方案只是延伸(这是正确的词吗？)如果图像太大，可以使用多个副本和页面方向。|389768|++++++++++++++++PrintDialog+dlg+=+new+PrintDialog();

++++++++++++if+(dlg.ShowDialog()+==+true)
++++++++++++{
++++++++++++++++BitmapImage+bmi+=+new+BitmapImage(new+Uri(strPath));

++++++++++++++++Image+img+=+new+Image();
++++++++++++++++img.Source+=+bmi;

++++++++++++++++if+(bmi.PixelWidth+<+dlg.PrintableAreaWidth+%7C%7C
+++++++++++++++++++++++++++bmi.PixelHeight+<+dlg.PrintableAreaHeight)
++++++++++++++++{
++++++++++++++++++++img.Stretch+=+Stretch.None;
++++++++++++++++++++img.Width+=+bmi.PixelWidth;
++++++++++++++++++++img.Height+=+bmi.PixelHeight;
++++++++++++++++}


++++++++++++++++if+(dlg.PrintTicket.PageBorderless+==+PageBorderless.Borderless)
++++++++++++++++{
++++++++++++++++++++img.Margin+=+new+Thickness(0);
++++++++++++++++}
++++++++++++++++else
++++++++++++++++{
++++++++++++++++++++img.Margin+=+new+Thickness(48);
++++++++++++++++}
++++++++++++++++img.VerticalAlignment+=+VerticalAlignment.Top;
++++++++++++++++img.HorizontalAlignment+=+HorizontalAlignment.Left;

++++++++++++++++for+(int+i+=+0;+i+<+dlg.PrintTicket.CopyCount;+i%2B%2B)
++++++++++++++++{
++++++++++++++++++++dlg.PrintVisual(img,+"Print+a+Image");
++++++++++++++++}
++++++++++++}|code-block|syntax|javascript|389769|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

all these answers has the problem, that's always stretching the image to pagesize and cuts off some content at trying this.
 Found a little bit easier way.
 
My own solution only stretch(is this the right word?) if the image is to large, can use multiply copies and pageorientations.
<pre><code> PrintDialog dlg = new PrintDialog();

 if (dlg.ShowDialog() == true)
 {
 BitmapImage bmi = new BitmapImage(new Uri(strPath));

 Image img = new Image();
 img.Source = bmi;

 if (bmi.PixelWidth &lt; dlg.PrintableAreaWidth ||
 bmi.PixelHeight &lt; dlg.PrintableAreaHeight)
 {
 img.Stretch = Stretch.None;
 img.Width = bmi.PixelWidth;
 img.Height = bmi.PixelHeight;
 }


 if (dlg.PrintTicket.PageBorderless == PageBorderless.Borderless)
 {
 img.Margin = new Thickness(0);
 }
 else
 {
 img.Margin = new Thickness(48);
 }
 img.VerticalAlignment = VerticalAlignment.Top;
 img.HorizontalAlignment = HorizontalAlignment.Left;

 for (int i = 0; i &lt; dlg.PrintTicket.CopyCount; i++)
 {
 dlg.PrintVisual(img, &quot;Print a Image&quot;);
 }
 }
</code></pre>

In C#, I am trying to print an image using PrintDocument class with the below code. The image is of size 1200 px width and 1800 px height. I am trying to print this image in a 4*6 paper using a small zeebra printer. But the program is printing only 4*6 are of the big image. that means it is not adjusting the image to the paper size ! 

<pre><code> PrintDocument pd = new PrintDocument();
 pd.PrintPage += (sender, args) =&gt;
 {
 Image i = Image.FromFile("C://tesimage.PNG");
 Point p = new Point(100, 100);
 args.Graphics.DrawImage(i, 10, 10, i.Width, i.Height);
 };
 pd.Print();
</code></pre>

When i print the same image using Window Print (right click and select print, it is scaling automatically to paper size and printing correctly. that means everything came in 4*6 paper.) How do i do the same in my C# program ?

Printing image with PrintDocument. how to adjust the image to fit paper size

在C#中，我尝试使用PrintDocument类打印图像，代码如下。图像的大小为1200像素宽，1800像素高。我正尝试用一台小型zeebra打印机在4*6的纸张上打印这张图片。但是程序只打印了4*6张大图像。这意味着它不会将图像调整为纸张大小！     PrintDocument pd = new PrintDocu...

问使用PrintDocument打印图像。如何调整图像以适应纸张大小
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