Document.TouchScreen/Components/ImageHelper.cs

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using System;
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.Navigation;
using System.Windows.Shapes;
using System.IO;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows.Interop;

namespace Document.TouchScreen
{
    class ImageHelper
    {   
        /// <summary>
        /// 保存截图
        /// </summary>
        /// <param name="ui">控件名称</param>
        /// <param name="filename">图片文件名</param>
        public static void SaveFrameworkElementToImage(IntPtr handle, int width, int height,string path)
        {
            try
            {
                IntPtr hscrdc = GetWindowDC(handle);
                //System.Windows.Forms.Control control = System.Windows.Forms.Control.FromHandle(hWnd);
                IntPtr hbitmap = CreateCompatibleBitmap(hscrdc, width, height);
                IntPtr hmemdc = CreateCompatibleDC(hscrdc);
                SelectObject(hmemdc, hbitmap);
                PrintWindow(handle, hmemdc, 0);
                Bitmap bmp = Bitmap.FromHbitmap(hbitmap);
                DeleteDC(hscrdc);//删除用过的对象
                DeleteDC(hmemdc);//删除用过的对象
                bmp.Save("D:\\5.jpg");
                            
            }
            catch (Exception ee)
            {
            }
        }
        #region import dll
        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        public static extern IntPtr CreateDC(string driver, string device, IntPtr res1, IntPtr res2);

        [DllImport("gdi32.dll")]
        public static extern bool BitBlt(IntPtr hObject, int nXDest, int nYDest, int nWidth,
            int nHeight, IntPtr hObjSource, int nXSrc, int nYSrc, TernaryRasterOperations dwRop);

        public enum TernaryRasterOperations
        {
            SRCCOPY = 0x00CC0020, /* dest = source*/
            SRCPAINT = 0x00EE0086, /* dest = source OR dest*/