打印预览XAML代码:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
<controls:WindowEx x:Class="SunCreate.Vipf.Client.UI.MapPrintPreview" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:controls="clr-namespace:SunCreate.Common.Controls;assembly=SunCreate.Common.Controls" mc:Ignorable="d" d:DesignHeight="700" d:DesignWidth="1000" Loaded="WindowEx_Loaded"> <Window.Resources> <ResourceDictionary> <!-- 文字按钮 --> <Style x:Key="stlTxtBtn" TargetType="{x:Type Button}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Button}"> <Border Background="Transparent"> <Border x:Name="bd" Background="{TemplateBinding Background}" CornerRadius="2" Padding="{TemplateBinding Padding}"> <TextBlock x:Name="txt" VerticalAlignment="Center" HorizontalAlignment="Center" Margin="5 2 5 2" Foreground="White" ><InlineUIContainer> <ContentPresenter /> </InlineUIContainer></TextBlock> </Border> </Border> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="true"> <Setter TargetName="bd" Property="Background" Value="#33c4f5"/> </Trigger> <Trigger Property="IsPressed" Value="true"> <Setter TargetName="txt" Property="FontSize" Value="11"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> </ResourceDictionary> </Window.Resources> <Grid> <Grid.RowDefinitions> <RowDefinition Height="38"></RowDefinition> <RowDefinition></RowDefinition> </Grid.RowDefinitions> <Border Background="#f0f0f0"> <Button x:Name="btnPrint" Margin="10 0 0 0" Background="#1aa4f5" Width="60" Height="28" HorizontalAlignment="Left" FontSize="12" Style="{StaticResource stlTxtBtn}" Click="btnPrint_Click" Content="打印"></Button> </Border> <Border Grid.Row="1" Background="#a0a0a0"> <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"> <!-- 该Border设置成固定A4纸大小 --> <Border Background="#fff" Margin="10" Width="842" Height="595"> <!-- 该Border可缩放至打印纸 --> <Border x:Name="border"> <Image x:Name="img" Margin="10" Stretch="Uniform" Source="{Binding Image}" HorizontalAlignment="Left" VerticalAlignment="Top" ></Image> </Border> </Border> </ScrollViewer> </Border> </Grid> </controls:WindowEx>
打印预览后台代码(注意:打印的是Border不是Image):
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
using SunCreate.Common.Controls; using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Printing; using System.Text; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; namespace SunCreate.Vipf.Client.UI { /// <summary> /// 地图打印预览 /// </summary> public partial class MapPrintPreview : WindowEx { /// <summary> /// 需要打印预览的控件 /// </summary> private FrameworkElement _element; private BitmapImage _Image; public BitmapImage Image { get { return _Image; } set { _Image = value; OnPropertyChanged("Image"); } } public MapPrintPreview(FrameworkElement element) { InitializeComponent(); this.DataContext = this; _element = element; } private void WindowEx_Loaded(object sender, RoutedEventArgs e) { int width = (int)_element.ActualWidth; int height = (int)_element.ActualHeight; RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(width, height, 96, 96, PixelFormats.Pbgra32); renderTargetBitmap.Render(_element); BmpBitmapEncoder bmpBitmapEncoder = new BmpBitmapEncoder(); bmpBitmapEncoder.Frames.Add(BitmapFrame.Create(renderTargetBitmap)); MemoryStream memoryStream = new MemoryStream(); bmpBitmapEncoder.Save(memoryStream); memoryStream.Position = 0; BitmapImage bitmapImage = new BitmapImage(); bitmapImage.BeginInit(); bitmapImage.StreamSource = memoryStream; bitmapImage.EndInit(); Image = bitmapImage; } private void btnPrint_Click(object sender, RoutedEventArgs e) { PrintDialog printDialog = new PrintDialog(); printDialog.PrintTicket.PageOrientation = PageOrientation.Landscape; if (printDialog.ShowDialog() == true) { printDialog.PrintVisual(border, "打印地图"); } } } }
打印预览效果图(说明:地图没数据所以都是空白;地图下面空白,是因为地图尺寸长宽比例和A4纸比例不同,缩放到A4纸):
点击“打印”弹出系统的打印对话框。这个功能做的不是很理想,只是简单实现了预览与打印,没有达到我想要的效果。