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/// <summary> /// 提供全屏和指定窗口的截图 以及保存为文件的类 /// </summary> public class ScreenCapture { /// <summary> /// 全屏截图 /// </summary> /// <returns></returns> public Image CaptureScreen() { return CaptureWindow( User32.GetDesktopWindow() ); } /// <summary> /// 指定窗口截图 /// </summary> /// <param name="handle">窗口句柄. (在windows应用程序中, 从Handle属性获得)</param> /// <returns></returns> public Image CaptureWindow(IntPtr handle) { IntPtr hdcSrc = User32.GetWindowDC(handle); User32.RECT windowRect = new User32.RECT(); User32.GetWindowRect(handle,ref windowRect); int width = windowRect.right - windowRect.left; int height = windowRect.bottom - windowRect.top; IntPtr hdcDest = GDI32.CreateCompatibleDC(hdcSrc); IntPtr hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc,width,height); IntPtr hOld = GDI32.SelectObject(hdcDest,hBitmap); GDI32.BitBlt(hdcDest,0,0,width,height,hdcSrc,0,0,GDI32.SRCCOPY); GDI32.SelectObject(hdcDest,hOld); GDI32.DeleteDC(hdcDest); User32.ReleaseDC(handle,hdcSrc); Image img = Image.FromHbitmap(hBitmap); GDI32.DeleteObject(hBitmap); return img; } /// <summary> /// 指定窗口截图 保存为图片文件 /// </summary> /// <param name="handle"></param> /// <param name="filename"></param> /// <param name="format"></param> public void CaptureWindowToFile(IntPtr handle, string filename, ImageFormat format) { Image img = CaptureWindow(handle); img.Save(filename,format); } /// <summary> /// 全屏截图 保存为文件 /// </summary> /// <param name="filename"></param> /// <param name="format"></param> public void CaptureScreenToFile(string filename, ImageFormat format) { Image img = CaptureScreen(); img.Save(filename,format); } /// <summary> /// 辅助类 定义 Gdi32 API 函数 /// </summary> private class GDI32 { public const int SRCCOPY = 0x00CC0020; [DllImport("gdi32.dll")] public static extern bool BitBlt(IntPtr hObject,int nXDest,int nYDest, int nWidth,int nHeight,IntPtr hObjectSource, int nXSrc,int nYSrc,int dwRop); [DllImport("gdi32.dll")] public static extern IntPtr CreateCompatibleBitmap(IntPtr hDC,int nWidth, int nHeight); [DllImport("gdi32.dll")] public static extern IntPtr CreateCompatibleDC(IntPtr hDC); [DllImport("gdi32.dll")] public static extern bool DeleteDC(IntPtr hDC); [DllImport("gdi32.dll")] public static extern bool DeleteObject(IntPtr hObject); [DllImport("gdi32.dll")] public static extern IntPtr SelectObject(IntPtr hDC,IntPtr hObject); } /// <summary> /// 辅助类 定义User32 API函数 /// </summary> private class User32 { [StructLayout(LayoutKind.Sequential)] public struct RECT { public int left; public int top; public int right; public int bottom; } [DllImport("user32.dll")] public static extern IntPtr GetDesktopWindow(); [DllImport("user32.dll")] public static extern IntPtr GetWindowDC(IntPtr hWnd); [DllImport("user32.dll")] public static extern IntPtr ReleaseDC(IntPtr hWnd,IntPtr hDC); [DllImport("user32.dll")] public static extern IntPtr GetWindowRect(IntPtr hWnd,ref RECT rect); } }
能够自适应窗体大小的WinForm 控件
//窗体初始化 public frmAutoSketch() { InitializeComponent(); //在窗体中放一个容器（例如：Panel），并且将容器的Dock属性设置为Fill。窗体中其他控件都放在这个容器中。 this.panel_AutoSketch.Dock = DockStyle.Fill; GetAllInitInfo(this.panel_AutoSketch); this.SizeChanged += frmSketchFormcs_SizeChanged; } //窗体大小更改时更新空间大小 void frmSketchFormcs_SizeChanged(object sender, EventArgs e) { if (controlInfo.Count > 0) { ControlsChangeInit(this.Controls[0]); ControlsChange(this.Controls[0]); } } #region 控件缩放 double formWidth;//窗体原始宽度 double formHeight;//窗体原始高度 double scaleX;//水平缩放比例 double scaleY;//垂直缩放比例 Dictionary<string, string> controlInfo = new Dictionary<string, string>();//控件中心Left,Top,控件Width,控件Height,控件字体Size /// <summary> /// 获取所有原始数据 /// </summary> private void GetAllInitInfo(Control CrlContainer) { if (CrlContainer.Parent == this) { formWidth = Convert.ToDouble(CrlContainer.Width); formHeight = Convert.ToDouble(CrlContainer.Height); } foreach (Control item in CrlContainer.Controls) { if (item.Name.Trim() != "") controlInfo.Add(item.Name, (item.Left + item.Width / 2) + "," + (item.Top + item.Height / 2) + "," + item.Width + "," + item.Height + "," + item.Font.Size); if ((item as UserControl) == null && item.Controls.Count > 0) GetAllInitInfo(item); } } private void ControlsChangeInit(Control CrlContainer) { scaleX = (Convert.ToDouble(CrlContainer.Width) / formWidth); scaleY = (Convert.ToDouble(CrlContainer.Height) / formHeight); } private void ControlsChange(Control CrlContainer) { double[] pos = new double[5];//pos数组保存当前控件中心Left,Top,控件Width,控件Height,控件字体Size foreach (Control item in CrlContainer.Controls) { if (item.Name.Trim() != "") { if ((item as UserControl) == null && item.Controls.Count > 0) ControlsChange(item); string[] strs = controlInfo[item.Name].Split(','); for (int j = 0; j < 5; j++) { pos[j] = Convert.ToDouble(strs[j]); } double itemWidth = pos[2] * scaleX; double itemHeight = pos[3] * scaleY; item.Left = Convert.ToInt32(pos[0] * scaleX - itemWidth / 2); item.Top = Convert.ToInt32(pos[1] * scaleY - itemHeight / 2); item.Width = Convert.ToInt32(itemWidth); item.Height = Convert.ToInt32(itemHeight); item.Font = new Font(item.Font.Name, float.Parse((pos[4] * Math.Min(scaleX, scaleY)).ToString())); } } } #endregion
ListView控件的常用操作
listView1.Columns.Clear();//清空列记录 ColumnHeader cZh = new ColumnHeader();//创建一个列 cZh.Text = "英文";//列名 ColumnHeader cCh = new ColumnHeader(); cCh.Text = "中文"; listView1.Columns.AddRange(new ColumnHeader[] { cZh, cCh });//将这两列加入listView1 listView1.View = View.Details;//列的显示模式 ListViewItem lvi = new ListViewItem(new string[] { "dog","狗"}, -1);//创建列表项 listView1.Items.Add(lvi);//将项加入listView1列表中
控件闪烁处理办法
就是在这个窗体的构造函数中增加以下三行代码： 请在构造函数里面底下加上如下几行：
SetStyle(ControlStyles.UserPaint, true); SetStyle(ControlStyles.AllPaintingInWmPaint, true); // 禁止擦除背景. SetStyle(ControlStyles.DoubleBuffer, true); // 双缓冲
参数说明：
UserPaint 如果为 true，控件将自行绘制，而不是通过操作系统来绘制。此样式仅适用于派生自 Control 的类。 AllPaintingInWmPaint 如果为 true，控件将忽略 WM_ERASEBKGND 窗口消息以减少闪烁。仅当 UserPaint 位设置为 true 时，才应当应用该样式。 DoubleBuffer 如果为true，则绘制在缓冲区中进行，完成后将结果输出到屏幕上。双重缓冲区可防止由控件重绘引起的闪烁。要完全启用双重缓冲，还必须将 UserPaint 和 AllPaintingInWmPaint 样式位设置为 true。
对数据结构排序
#region 对数据结构排序 /// <summary> /// 对数据结构排序 /// </summary> /// <param name="list">数据列表</param> /// <param name="order">升序排列</param> /// <param name="strProperty">排序字段</param> /// <param name="_isFigure">字段为数字类型</param> /// <returns></returns> private List<IPlaneShow> SortIPlaneShows(IPlaneShow[] list, bool order, string strProperty, bool _isFigure) { curSortProperty = strProperty; IsOrderly = order; IsFigure = _isFigure; Comparison<IPlaneShow> com = new Comparison<IPlaneShow>(Compare); List<IPlaneShow> listOri = new List<IPlaneShow>(); listOri.AddRange(list); listOri.Sort(com); return listOri; } #region 排序辅助 //排序字段 string curSortProperty = ""; //顺序排序 bool IsOrderly = true; //是否为数字类型的字段 bool IsFigure = false; //排序器 int Compare(IPlaneShow A, IPlaneShow B) { int result; CaseInsensitiveComparer objCompare = new CaseInsensitiveComparer(); string strA = A.GetType().GetProperty(curSortProperty).GetValue(A, null).ToString(); string strB = B.GetType().GetProperty(curSortProperty).GetValue(B, null).ToString(); if (IsFigure) { //数字排序 double dA = double.Parse(strA); double dB = double.Parse(strB); result = objCompare.Compare(strA, strB); } else { //字符排序 result = objCompare.Compare(strA, strB); } //正反序 if (IsOrderly) result *= -1; return result; } #endregion #endregion
home.txt · 最后更改: 2025/02/27 17:17 由 colin
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