Wpf 控件导出Png

超、凢脫俗 2022-06-17 14:12 271阅读 0赞

源码地址：[http://download.csdn.net/detail/yeness/9828055][http_download.csdn.net_detail_yeness_9828055]

## Wpf 前端 ##

## 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); 
                    }                
                }
            }

[http_download.csdn.net_detail_yeness_9828055]: http://download.csdn.net/detail/yeness/9828055