打印輔助類(lèi)。

首先添加

using System.Windows.Printing;

命名空間

1 public class SilverPrint 2 { 3 //設(shè)置每一項(xiàng)之間的間距 4 int listPrintIndex = 0; 5 private List<PrintStr> listStr = null; 6 public void Print(List<PrintStr> strs) 7 { 8 listStr = strs; 9 PrintDocument printDoc = new PrintDocument(); 10 printDoc.PrintPage += OnPrintPage; 11 PrinterFallbackSettings settings = new PrinterFallbackSettings(); 12 settings.ForceVector = true; 13 printDoc.Print("dd", settings, true);//dd是文檔的名字 14 } 15 public void OnPrintPage(object sender, PrintPageEventArgs e) 16 { 17 Canvas printSurface = new Canvas(); 18 //得到最頂端位置 19 double topPosition = e.PageMargins.Top; 20 //遍歷當(dāng)前的ListBox.Items 21 while (listPrintIndex < listStr.Count) 22 { 23 //實(shí)例化TextBlock用來(lái)存放每一行的值 24 TextBlock txt = new TextBlock(); 25 txt.FontSize = listStr[listPrintIndex].FontSize; 26 txt.Text = listStr[listPrintIndex].Content; 27 double measuredHeight = txt.ActualHeight; 28 //如果打印的當(dāng)前行高度不合適的話(huà)，則進(jìn)行分頁(yè) 29 if (measuredHeight > (e.PrintableArea.Height - topPosition)) 30 { 31 e.HasMorePages = true; 32 topPosition = e.PageMargins.Top; 33 break; 34 } 35 //設(shè)置TextBlock在Canvas中的位置 36 txt.SetValue(Canvas.TopProperty, topPosition); 37 txt.SetValue(Canvas.LeftProperty, e.PageMargins.Left); 38 //將TextBlock添加到打印的元素中去 39 printSurface.Children.Add(txt); 40 listPrintIndex++; 41 //追加高度 42 topPosition = topPosition + measuredHeight; 43 } 44 e.PageVisual = printSurface; 45 } 46 } 47 //打印內(nèi)容類(lèi) 48 public class PrintStr 49 { 50 public string Content { set; get; } 51 public int FontSize { set; get; } 52 public PrintStr(string str,int size=10) 53 { 54 this.Content = str; 55 this.FontSize = size; 56 } 57 }

打印直接調(diào)用

new SilverPrint().Print(printStrs);

如果是silverlight5.0之前會(huì)彈出打印預(yù)覽。。。如果是silverlight5.0 允許瀏覽器外允許 增加權(quán)限。就可以不用彈出打印預(yù)覽，直接打印了。

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