Wpf 控件导出Png

源码地址：http://download.csdn.net/detail/yeness/9828055

Wpf 前端

<Window    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    x:Class="WPFImages.RoundedCornerGenerator"    Title="Rounded Corner Bar Generator" Height="350" Width="480"     MinHeight="350" MinWidth="480">    <Window.Resources>        <LinearGradientBrush x:Key="BlueGradientBackground" EndPoint ="1,0.5" StartPoint="0,0.5">            <GradientStop Color="#FFB2C0CD" Offset="0.019"/>            <GradientStop Color="#FF31487A" Offset="1"/>            <GradientStop Color="#FF51658E" Offset="0.663"/>        </LinearGradientBrush>    </Window.Resources>    <DockPanel>        <StackPanel RenderTransformOrigin="0.223,0.248"                     x:Name="grdControlContainer" DockPanel.Dock="Top"                     Background="{StaticResource BlueGradientBackground}">            <WrapPanel Margin="10,5,0,0">                <Label x:Name="lblWidth" Content="Width:" />                <TextBox HorizontalAlignment="Left"  x:Name="txtWidth"  Width="40" Height="23" Text="200" TextWrapping="Wrap" TextAlignment="Right" TextChanged="UpdateImage"/>                <Label HorizontalAlignment="Left" VerticalAlignment="Top" Content="    Height:"/>                <TextBox HorizontalAlignment="Left"  x:Name="txtHeight"  Width="40" Height="23" Text="25" TextWrapping="Wrap" TextAlignment="Right" TextChanged="UpdateImage"/>                <Label x:Name="lblRadius" Content="   Radius:" />                <TextBox HorizontalAlignment="Left"  x:Name="txtRadius"  Width="40" Height="23" Text="15" TextWrapping="Wrap" TextAlignment="Right" TextChanged="UpdateImage"/>                <Label x:Name="lblColor" Content="   Color:" />                                <TextBox HorizontalAlignment="Left"  x:Name="txtColor"  Width="80" Height="23" Text="Navy" TextWrapping="Wrap" TextChanged="UpdateImage" />                                <Button Name="btnColorLookup" Content="..." Height="22" Width="22" VerticalAlignment="Bottom" Margin="0,0,0,1" Click="btnColorLookup_Click"/>            </WrapPanel>            <WrapPanel Margin="10,10,0,10">                <Label Content="Corners:" Margin="0,0,5,0"/>                <RadioButton Name="radTop" Content="Top" IsChecked="True"  Checked="UpdateImage" VerticalAlignment="Center" />                <RadioButton Name="radBottom" Content="Bottom" Margin="15,0" Checked="UpdateImage" VerticalAlignment="Center" />                <RadioButton Name="radBoth" Margin="10,0" Content="Both" Checked="UpdateImage" VerticalAlignment="Center" />            </WrapPanel>        </StackPanel>        <StackPanel DockPanel.Dock="Bottom" Background="{StaticResource BlueGradientBackground}" >            <WrapPanel Margin="10,3,10,3">                <Label Name="lblFilename" Content="Save to file:" />                <TextBox Name="txtFilename" Height="23" Width="250" Text="c:\temp\test.png"/>                <Button Name="btnFileLookup" Content=" ... " Height="22" Width="22" VerticalAlignment="Bottom" Margin="0,0,0,1" Click="btnFileLookup_Click"/>                <Button x:Name="btnSave" Height="23" Width="75" Margin="20,0,0,0" Content="_Save"  Click="btnSave_Click" />            </WrapPanel>        </StackPanel>        <ScrollViewer Name="graphScrollViewer" Grid.Row="1" Panel.ZIndex="0" ScrollViewer.VerticalScrollBarVisibility="Auto" BorderBrush="{x:Null}" BorderThickness="0" Focusable="False">            <Grid Name="renderContainer" Background="Azure" ClipToBounds="True">                <Canvas Name="stOuter">                    <Canvas Name="cvWrapper" Background="Transparent" ClipToBounds="True">                        <Rectangle Name="rectMainShape">                        </Rectangle>                    </Canvas>                </Canvas>            </Grid>        </ScrollViewer>    </DockPanel></Window>

c#

using System;using System.Collections.Generic;using System.Linq;using System.Text;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.Shapes;using System.IO;using Microsoft.Win32;namespace WPFImages{    /// <summary>    /// Interaction logic for RoundedCornerGenerator.xaml    /// </summary>    public partial class RoundedCornerGenerator : Window    {        public RoundedCornerGenerator()        {            InitializeComponent();            this.txtHeight.Text = this.txtHeight.Text + " ";                    }        private void btnRender_Click(object sender, RoutedEventArgs e)        {            this.DisplayImage();        }        protected void UpdateImage(object sender, RoutedEventArgs e)        {            this.DisplayImage();        }        public void DisplayImage()        {            try            {                float Height = float.Parse(this.txtHeight.Text);                float OriginalHeight = Height;                float Width = float.Parse(this.txtWidth.Text);                float Radius = float.Parse(this.txtRadius.Text);                this.cvWrapper.Width = Width;                this.cvWrapper.Height = Height;                this.stOuter.Width = Width;                this.stOuter.Height = Height;                this.rectMainShape.RenderTransform = null;                this.rectMainShape.ClipToBounds = false;                if (this.radTop.IsChecked.Value || this.radBottom.IsChecked.Value)                {                    Height += Radius;                    this.rectMainShape.ClipToBounds = true;                }                this.rectMainShape.Width = Width;                this.rectMainShape.Height = Height;                this.rectMainShape.RadiusX = Radius;                this.rectMainShape.RadiusY = Radius;                this.rectMainShape.Fill = new BrushConverter().ConvertFrom(this.txtColor.Text) as Brush;                // *** for bottom shape we'll use TranslateTransform                if (this.radBottom.IsChecked.Value)                    this.rectMainShape.RenderTransform = new TranslateTransform(0, Radius * -1);                        //new RotateTransform(180, Width / 2, OriginalHeight / 2);            }            catch            {}        }        private void btnSave_Click(object sender, RoutedEventArgs e)        {            int Height = (int)this.cvWrapper.ActualHeight;            int Width = (int)this.cvWrapper.ActualWidth;            RenderTargetBitmap bmp = new RenderTargetBitmap(Width, Height, 96, 96, PixelFormats.Pbgra32);            bmp.Render(this.cvWrapper);            string file = this.txtFilename.Text;            string Extension = System.IO.Path.GetExtension(file).ToLower();            BitmapEncoder encoder;                        if (Extension == ".gif")                 encoder = new GifBitmapEncoder();                        else if (Extension == ".png")                encoder = new PngBitmapEncoder();                        else if (Extension == ".jpg")                encoder = new JpegBitmapEncoder();                        else                return;            encoder.Frames.Add(BitmapFrame.Create(bmp));            using (Stream stm = File.Create(file))            {                encoder.Save(stm);            }        }        private void btnFileLookup_Click(object sender, RoutedEventArgs e)        {            SaveFileDialog sd = new SaveFileDialog();            sd.CheckPathExists = true;            sd.Filter = "Image files (*.png;*.gif;*.jpg)|*.png;*.gif;*.jpg|All files (*.*)|*.*";            if (!sd.ShowDialog().Value)                return;            this.txtFilename.Text = sd.FileName;        }        private void btnColorLookup_Click(object sender, RoutedEventArgs e)        {            // *** Ack - no WPF Color picker - use the WinForms one.             System.Windows.Forms.ColorDialog cd = new System.Windows.Forms.ColorDialog();            if (cd.ShowDialog() != System.Windows.Forms.DialogResult.OK)                return;            this.txtColor.Text = System.Drawing.ColorTranslator.ToHtml(cd.Color);        }    }}

补充导出PDF

 /// <summary>        /// 导出        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void BtnExprot_Click(object sender, RoutedEventArgs e)        {            // 1.获取路径和文件名称            string file = "";            string Extension="";            string path = "";            Microsoft.Win32.SaveFileDialog sd = new Microsoft.Win32.SaveFileDialog();            sd.CheckPathExists = true;            sd.Filter = "Image files (*.png)|*.png|Pdf File (*.pdf)|*.pdf";            if (!sd.ShowDialog().Value)                return;            file = sd.FileName;                                         // 文件名称            Extension = System.IO.Path.GetExtension(file).ToLower();    // 扩展名            path = System.IO.Path.GetFullPath(file);                    // 文件路径            // 2.1、生成图片            if (Extension != ".png" && Extension != ".pdf")                return;            int Height = (int)this.repeaterStatisticeUserControlList.ActualHeight;            int Width = (int)this.repeaterStatisticeUserControlList.ActualWidth;            RenderTargetBitmap bmp = new RenderTargetBitmap(Width, Height, 96, 96, PixelFormats.Pbgra32);            bmp.Render(this.repeaterStatisticeUserControlList);            if (Extension == ".png")            {                BitmapEncoder encoder = new PngBitmapEncoder();                encoder.Frames.Add(BitmapFrame.Create(bmp));                using (Stream stm = File.Create(file))                {                    encoder.Save(stm);                }            }            // 2.2、保存生成pdf            if (Extension == ".pdf")            {                BitmapEncoder encoder = new PngBitmapEncoder();                encoder.Frames.Add(BitmapFrame.Create(bmp));                using (Stream stm = File.Create(file))                {                    encoder.Save(stm);                }                // 左右上下                using (iTextSharp.text.Document doc = new iTextSharp.text.Document(iTextSharp.text.PageSize.A4, 0, 0, 0, 0))                {                    iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(file);                    image.ScalePercent(24f);                    iTextSharp.text.pdf.PdfWriter.GetInstance(doc, new FileStream(file, FileMode.Create));                    doc.Open();                    doc.Add(image);                 }                            }        }