本文转自:http://www.cnblogs.com/wuhuacong/archive/2011/10/20/2219665.html
到目前为止,类库的优化及内容介绍、例子实现同步进行,下面是最近的类库帮助文档整理截图。
1、全屏截图辅助控件 ScreenCaptureWindow
实现效果
1)本辅助类主要是用来方便实现对屏幕进行局部截图的功能,类似QQ截图的效果。
2)截图的时候,底图是当前屏幕的图像,加了灰度背景,当鼠标单击并拉动的时候,出现局部加亮区域,这个就是要截取的图片内容。图片截图后,用户可以实现自定义的保存等操作。
实现代码
1)辅助类提供的方法接口如下所示:
/// <summary>
/// </summary>
public Bitmap BitmapCache
/// <summary>
/// 图片截图结束后的事件处理
/// </summary>
public event EventHandler BitmapCropped;
/// <summary>
/// 拖动截图开始
/// </summary>
public Point DragStart
/// <summary>
/// 拖动截图结束
/// </summary>
public Point DragStop
2)辅助类ScreenCaptureWindow的使用例子代码如下所示(增加图片保存到文件的自定义操作)
{
private ScreenCaptureWindow captureWindow = null;
public Form1()
{
InitializeComponent();
}
private void captureWindow_BitmapCropped(object sender, EventArgs e)
{
if (captureWindow.DragStop != captureWindow.DragStart)
{
bool AutoSaveImages = false;
if (AutoSaveImages)
{
string path = Environment.GetFolderPath(Environment.SpecialFolder.MyPictures);
string fileName = "Snap_" + DateTime.Now.Ticks.ToString() + Guid.NewGuid().ToString().Substring(0, 2) + ".jpg";
captureWindow.BitmapCache.Save(Path.Combine(path, fileName), ImageFormat.Jpeg);
}
}
}
private void btnScreenCapture_Click(object sender, EventArgs e)
{
if (captureWindow != null)
{
captureWindow.BitmapCropped -= new EventHandler(captureWindow_BitmapCropped);
captureWindow.Dispose();
captureWindow = null;
}
if (captureWindow == null)
{
captureWindow = new ScreenCaptureWindow();
captureWindow.BitmapCropped += new EventHandler(captureWindow_BitmapCropped);
}
captureWindow = new ScreenCaptureWindow();
captureWindow.Show();
captureWindow.TopMost = true;
captureWindow.TopMost = false;
}
}
最简化的操作就是只是把截图的图片放到在剪切板里面(默认),实现操作如下所示:
private ScreenCaptureWindow captureWindow = null;
{
captureWindow = new ScreenCaptureWindow();
captureWindow.Show();
captureWindow.TopMost = true;
captureWindow.TopMost = false;
}
2、本辅助类主要是用来方便实现获取文件、文件夹、扩展名的图标信息
IconReaderHelper。实现效果
1)本辅助类主要是用来方便实现窗体的各种动画效果,包括创建、关闭、隐藏、移动状态的动画,动画支持滚动、滑动、各种方向变换、透明状态等。
实现代码
1)辅助类提供的方法接口如下所示
/// <summary>/// </summary>
public enum IconSize
/// <summary>
/// 指定文件夹是打开还是关闭状态选项
/// </summary>
public enum FolderType
/// <summary>
/// 返回给定文件的图标
/// </summary>
/// <param name="name">文件路径名</param>
/// <param name="size">大图标还是小图标</param>
/// <param name="linkOverlay">是否包含链接图标</param>
/// <returns>System.Drawing.Icon</returns>
public static Icon GetFileIcon(string name, IconSize size, bool linkOverlay)
/// <summary>
/// 用于访问系统文件夹图标。
/// </summary>
/// <param name="size">大图标还是小图标</param>
/// <param name="folderType">文件夹是打开还是关闭状态</param>
/// <returns>System.Drawing.Icon</returns>
public static Icon GetFolderIcon(IconSize size, FolderType folderType)
/// <summary>
/// 获取文件或者文件夹图标的显示名称
/// </summary>
/// <param name="name">文件或文件夹路径</param>
/// <param name="isDirectory">是否为文件夹</param>
/// <returns></returns>
public static string GetDisplayName(string name, bool isDirectory)
#region 后缀名图标操作
/// <summary>
/// 添加扩展名小图标对象到ImageList集合中,并返回位置;如果存在,则返回对应的位置。
/// </summary>
/// <param name="images"></param>
/// <param name="extension"></param>
/// <returns></returns>
public static int GetIcon(ImageList images, string extension)
/// <summary>
/// 添加扩展名图标对象到ImageList集合中,并返回位置;如果存在,则返回对应的位置。
/// </summary>
/// <param name="images">ImageList集合</param>
/// <param name="extension">扩展名</param>
/// <param name="largeIcon">是否大图标</param>
/// <returns></returns>
public static int GetIcon(ImageList images, string extension, bool largeIcon)
/// <summary>
/// 获取扩展名的图标
/// </summary>
/// <param name="extension">扩展名</param>
/// <param name="large">是否为大图标</param>
/// <returns></returns>
public static Icon ExtractIconForExtension(string extension, bool large)
/// <summary>
/// 获取指定文件的关联图标
/// </summary>
/// <param name="stubPath">指定的文件路径</param>
/// <param name="large">是否为大图标</param>
/// <returns></returns>
public static Icon GetAssociatedIcon(string stubPath, bool large)
#endregion
2)辅助类IconReaderHelper的使用例子代码如下所示
{
if (!string.IsNullOrEmpty(this.txtFilPath.Text))
{
//获取文件的图标
Icon ico = IconReaderHelper.GetFileIcon(this.txtFilPath.Text,
IconReaderHelper.IconSize.Large, false);
this.pictureBox1.Image = Bitmap.FromHicon(ico.Handle);
//获取对应图标的说明名称
string name = IconReaderHelper.GetDisplayName(this.txtFilPath.Text, false);
this.Text = name;
}
//获取系统文件夹图标
Icon ico2 = IconReaderHelper.GetFolderIcon(IconReaderHelper.IconSize.Large,
IconReaderHelper.FolderType.Open);
this.pictureBox2.Image = Bitmap.FromHicon(ico2.Handle);
}
private void btnGetExtensionIcon_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(this.txtExtension.Text))
{
//获取扩展名图标
Icon ico = IconReaderHelper.ExtractIconForExtension(this.txtExtension.Text, true);
this.pictureBox2.Image = Bitmap.FromHicon(ico.Handle);
}
2、实现图片打印操作,并提供图片打印预览功能,图片自动根据页面进行居中、缩放、对齐等操作辅助类
ImagePrintHelper实现效果
1)本辅助类主要是用来方便实现图片打印操作,并提供图片打印预览功能,图片自动根据页面进行居中、缩放、对齐等默认操作。
打印预览的时候,自动调整图片为止,如下:
或者打印对话框
实现代码
1)辅助类提供的方法接口如下所示
/// <summary>
/// 将在页面上居中打印输出。
/// </summary>
public bool AllowPrintCenter = true;
/// <summary>
/// 旋转图像,如果它符合页面更好
/// </summary>
public bool AllowPrintRotate = true;
/// <summary>
/// 缩放图像,以更好地适应页面
/// </summary>
public bool AllowPrintEnlarge = true;
/// <summary>
/// 允许打印收缩,以更好适应页面
/// </summary>
public bool AllowPrintShrink = true;
#endregion
/// <summary>
/// 构造函数
/// </summary>
/// <param name="image">待打印的图片对象</param>
public ImagePrintHelper(Image image) : this(image, "test.png")
/// <summary>
/// 构造函数
/// </summary>
/// <param name="image">待打印的图片对象</param>
/// <param name="documentname">文档名称</param>
public ImagePrintHelper(Image image, string documentname)
/// <summary>
/// 显示打印对话框,确定则进行打印
/// </summary>
/// <returns></returns>
public PrinterSettings PrintWithDialog()
/// <summary>
/// 在预览对话框中预览图片
/// </summary>
public void PrintPreview()
2)辅助类ImagePrintHelper的使用例子代码如下所示
{
ImagePrintHelper imagePrint = new ImagePrintHelper(this.pictureBox1.Image, Path.GetFileName(this.txtFilPath.Text));
imagePrint.AllowPrintShrink = true;
imagePrint.AllowPrintCenter = true;
imagePrint.AllowPrintEnlarge = true;
imagePrint.AllowPrintRotate = true;
imagePrint.PrintWithDialog();//弹出打印对话框,确认进行打印
}
private void btnPrintView_Click(object sender, EventArgs e)
{
ImagePrintHelper imagePrint = new ImagePrintHelper(this.pictureBox1.Image, Path.GetFileName(this.txtFilPath.Text));
imagePrint.PrintPreview();//弹出打印预览页面
}
2、Web页面预览效果图片抓取辅助类 WebPageCapture和WebPreview
实现效果1)本辅助类主要是用来方便实现Web页面预览效果图片抓取操作。
实现代码
1)辅助类提供的方法接口如下所示
#region 字段属性
/// <summary>
/// 图片下载完毕的时间处理
/// </summary>
public event ImageEventHandler DownloadCompleted;
/// <summary>
/// 图片处理委托定义
/// </summary>
/// <param name="image"></param>
public delegate void ImageEventHandler(Image image);
/// <summary>
/// 浏览区域大小
/// </summary>
public Size BrowserSize { get; set; }
/// <summary>
/// 页面URL地址
/// </summary>
public string URL { get; set; }
/// <summary>
/// 下载的图片对象
/// </summary>
public Image Image { get; private set; }
#endregion
#region 构造函数
/// <summary>
/// 构造函数,默认为屏幕大小
/// </summary>
public WebPageCapture() : this(Screen.PrimaryScreen.Bounds.Size) { }
/// <summary>
/// 构造函数,指定浏览区域大小
/// </summary>
/// <param name="width">宽度</param>
/// <param name="height">高度</param>
public WebPageCapture(int width, int height) : this(new Size(width, height)) { }
/// <summary>
/// 构造函数,指定浏览区域大小
/// </summary>
/// <param name="browserSize">浏览区域大小</param>
public WebPageCapture(Size browserSize)
#endregion
/// <summary>
/// 下载页面到图片中
/// </summary>
public void DownloadPage()
/// <summary>
/// 下载页面到图片中
/// </summary>
/// <param name="url">页面Url地址</param>
public void DownloadPage(string url)
2)辅助类WebPageCapture的使用例子代码如下所示
{
private WebPageCapture capture = new WebPageCapture();
public FrmWebPreview()
{
InitializeComponent();
capture.DownloadCompleted += new WebPageCapture.ImageEventHandler(capture_DownloadCompleted); }
void capture_DownloadCompleted(Image image)
{
this.pictureBox1.Image = image;
}
private void btnSnap1_Click(object sender, EventArgs e)
{
if (this.txtUrl.Text.Length == 0) return;
capture.DownloadPage(this.txtUrl.Text);
}
3) 辅助类WebPreview的使用例子代码如下所示
{
if (this.txtUrl.Text.Length == 0) return;
this.pictureBox1.Image = WebPreview.GetWebPreview(new Uri(this.txtUrl.Text), Screen.PrimaryScreen.Bounds.Size);
}
2、图片对象比较、缩放、缩略图、水印、压缩、转换、编码等操作辅助类 ImageHelper
实现效果1)本辅助类主要是用来方便实现图片对象比较、缩放、缩略图、水印、压缩、转换、编码等操作。
2)基本图片所有的相关操作,均可在该辅助类中找到,该辅助类具有专业、全面、封装良好等特点。
实现代码
1)辅助类提供的方法接口如下所示
/// <summary>
/// </summary>
public class ImageHelper
{
#region 图片比较
/// <summary>
/// 对比两张图片
/// </summary>
/// <param name="bmp1">The first bitmap image</param>
/// <param name="bmp2">The second bitmap image</param>
/// <returns>CompareResult</returns>
public static CompareResult CompareTwoImages(Bitmap bmp1, Bitmap bmp2)
#endregion
#region 图片缩放
/// <summary>
/// 按比例调整图片大小
/// </summary>
/// <param name="imgPhoto">原始图片对象.</param>
/// <param name="Percent">调整比例</param>
/// <returns></returns>
public static Image ResizeImageByPercent(Image imgPhoto, int Percent)
/// <summary>
/// 缩放、裁切图片
/// </summary>
/// <param name="originalImage">原始图片对象</param>
/// <param name="width">宽度</param>
/// <param name="height">高度</param>
/// <param name="mode">调整模式</param>
/// <returns></returns>
public static Image ResizeImageToAFixedSize(Image originalImage, int width, int height, ScaleMode mode)
#endregion
#region 创建缩略图
/// <summary>
/// 生成缩略图
/// </summary>
/// <param name="originalImagePath">源图路径(物理路径)</param>
/// <param name="thumbnailPath">缩略图路径(物理路径)</param>
/// <param name="width">缩略图宽度</param>
/// <param name="height">缩略图高度</param>
/// <param name="mode">生成缩略图的方式</param>
public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, ScaleMode mode)
/// <summary>
/// 生成缩略图
/// </summary>
/// <param name="originalImagePath">源图路径(物理路径)</param>
/// <param name="thumbnailPath">缩略图路径(物理路径)</param>
/// <param name="width">缩略图宽度</param>
/// <param name="height">缩略图高度</param>
/// <param name="mode">生成缩略图的方式</param>
public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, ScaleMode mode, System.Drawing.Imaging.ImageFormat format)
#endregion
#region 图片水印
/// <summary>
/// 添加文字水印 默认字体:Verdana 12号大小 斜体 黑色 位置:右下角
/// </summary>
/// <param name="originalImage">Image</param>
/// <param name="text">水印字</param>
/// <returns></returns>
public static Image WatermarkText(Image originalImage, string text)
/// <summary>
/// 添加文字水印 默认字体:Verdana 12号大小 斜体 黑色
/// </summary>
/// <param name="originalImage">Image</param>
/// <param name="text">水印字</param>
/// <param name="position">水印位置</param>
/// <returns></returns>
public static Image WatermarkText(Image originalImage, string text, WatermarkPosition position)
/// <summary>
/// 添加文字水印
/// </summary>
/// <param name="originalImage">Image</param>
/// <param name="text">水印字</param>
/// <param name="position">水印位置</param>
/// <param name="font">字体</param>
/// <param name="brush">颜色</param>
/// <returns></returns>
public static Image WatermarkText(Image originalImage, string text, WatermarkPosition position, Font font, Brush brush)
/// <summary>
/// 添加图片水印(位置默认右下角)
/// </summary>
/// <param name="originalImage">Image</param>
/// <param name="watermarkImage">水印Image</param>
/// <returns></returns>
public static Image WatermarkImage(Image originalImage, Image watermarkImage)
/// <summary>
/// 添加图片水印
/// </summary>
/// <param name="originalImage">Image</param>
/// <param name="watermarkImage">水印Image</param>
/// <param name="position">位置</param>
/// <returns></returns>
public static Image WatermarkImage(Image originalImage, Image watermarkImage, WatermarkPosition position)
#endregion
#region 复制到剪切板
/// <summary>
/// 复制指定的图片对象到剪切板
/// </summary>
/// <param name="img">复制的图片对象</param>
public static void CopyToClipboard(Image img)
#endregion
#region 其他操作
/// <summary>
/// 获取图片编码解码器,保存JPG时用
/// </summary>
/// <param name="mimeType"> </param>
/// <returns>得到指定mimeType的ImageCodecInfo </returns>
public static ImageCodecInfo GetCodecInfo(string mimeType)
/// <summary>
/// 设置图片透明度
/// </summary>
/// <param name="imgPic">原始图片对象</param>
/// <param name="imgOpac">透明度</param>
/// <returns></returns>
public static Image SetImgOpacity(Image imgPic, float imgOpac)
/// <summary>
/// 修改图片亮度
/// </summary>
/// <param name="bmp">原始位图对象</param>
/// <param name="value">亮度值</param>
/// <returns></returns>
public static Bitmap ChangeBrightness(Bitmap bmp, int value)
#region 改变图片大小
/// <summary>
/// 改变图片大小
/// </summary>
/// <param name="img">原始图片对象</param>
/// <param name="width">改变的宽度</param>
/// <param name="height">改变的高度</param>
/// <returns></returns>
public static Image ChangeImageSize(Image img, int width, int height)
/// <summary>
/// 改变图片大小
/// </summary>
/// <param name="img">原始图片对象</param>
/// <param name="width">改变的宽度</param>
/// <param name="height">改变的高度</param>
/// <param name="preserveSize">限制的最小宽度或高度</param>
/// <returns></returns>
public static Image ChangeImageSize(Image img, int width, int height, bool preserveSize)
/// <summary>
/// 改变图片大小(按比例缩放)
/// </summary>
/// <param name="img">原始图片对象</param>
/// <param name="percentage">大小比例</param>
/// <returns></returns>
public static Image ChangeImageSize(Image img, float percentage)
#endregion
/// <summary>
/// 剪切图片
/// </summary>
/// <param name="img">原始图片对象</param>
/// <param name="rect">剪切区域</param>
/// <returns></returns>
public static Image CropImage(Image img, Rectangle rect)
/// <summary>
/// 剪裁 -- 用GDI+
/// </summary>
/// <param name="b">原始Bitmap</param>
/// <param name="StartX">开始坐标X</param>
/// <param name="StartY">开始坐标Y</param>
/// <param name="iWidth">宽度</param>
/// <param name="iHeight">高度</param>
/// <returns>剪裁后的Bitmap</returns>
public static Bitmap CropImage(Bitmap b, int StartX, int StartY, int iWidth, int iHeight)
public static Image AddCanvas(Image img, int size)
/// <summary>
/// 旋转图片
/// </summary>
/// <param name="img">待旋转的图片对象</param>
/// <param name="theta">旋转角度</param>
/// <returns></returns>
public static Bitmap RotateImage(Image img, float theta)
private static Rectangle BoundingBox(Image img, Matrix matrix)
/// <summary>
/// 获取所有屏幕的矩形宽度
/// </summary>
/// <returns></returns>
public static Rectangle GetScreenBounds()
/// <summary>
/// 使窗口背景透明
/// </summary>
/// <param name="hWnd">窗口句柄</param>
/// <param name="image">透明图片</param>
/// <returns></returns>
public static Bitmap MakeBackgroundTransparent(IntPtr hWnd, Image image)
/// <summary>
/// 保存打印图片文件
/// </summary>
/// <param name="image">图片对象</param>
/// <param name="transColor">透明色</param>
/// <param name="dpi">打印的dpi</param>
/// <param name="path">保存文件的路径</param>
public static void SaveOneInchPic(Image image, Color transColor, float dpi, string path)
#endregion
#region BASE64编码转换
/// <summary>
/// Base64编码转换到Image对象
/// </summary>
/// <param name="ImgBase64Str"></param>
/// <returns></returns>
public static Bitmap Base64StrToBmp(string ImgBase64Str)
/// <summary>
/// 从文件中转换图片对象到Base64编码
/// </summary>
/// <param name="ImgName"></param>
/// <returns></returns>
public static string ImageToBase64Str(string ImgName)
/// <summary>
/// 转换图片对象到Base64编码
/// </summary>
/// <param name="Img"></param>
/// <returns></returns>
public static string ImageToBase64Str(Image Img)
#endregion
#region 色彩处理
/// <summary>
/// 设置图形颜色 边缘的色彩更换成新的颜色
/// </summary>
/// <param name="p_Image">图片</param>
/// <param name="p_OldColor">老的边缘色彩</param>
/// <param name="p_NewColor">新的边缘色彩</param>
/// <param name="p_Float">溶差</param>
/// <returns>清理后的图形</returns>
public static Image SetImageColorBrim(Image p_Image, Color p_OldColor, Color p_NewColor, int p_Float)
/// <summary>
/// 设置图形颜色 所有的色彩更换成新的颜色
/// </summary>
/// <param name="p_Image">图片</param>
/// <param name="p_OdlColor">老的颜色</param>
/// <param name="p_NewColor">新的颜色</param>
/// <param name="p_Float">溶差</param>
/// <returns>清理后的图形</returns>
public static Image SetImageColorAll(Image p_Image, Color p_OdlColor, Color p_NewColor, int p_Float)
/// <summary>
/// 设置图形颜色 坐标的颜色更换成新的色彩 (漏斗)
/// </summary>
/// <param name="p_Image">新图形</param>
/// <param name="p_Point">位置</param>
/// <param name="p_NewColor">新的色彩</param>
/// <param name="p_Float">溶差</param>
/// <returns>清理后的图形</returns>
public static Image SetImageColorPoint(Image p_Image, Point p_Point, Color p_NewColor, int p_Float)
/// <summary>
/// SetImageColorPoint 循环调用 检查新的坐标是否符合条件 符合条件会写入栈p_ColorStack 并更改颜色
/// </summary>
/// <param name="p_DataBytes">数据区</param>
/// <param name="p_Stride">行扫描字节数</param>
/// <param name="p_ColorStack">需要检查的位置栈</param>
/// <param name="p_X">位置X</param>
/// <param name="p_Y">位置Y</param>
/// <param name="p_OldColor">老色彩</param>
/// <param name="p_NewColor">新色彩</param>
/// <param name="p_Float">溶差</param>
private static void SetImageColorPoint(byte[] p_DataBytes, int p_Stride, Stack<Point> p_ColorStack, int p_X, int p_Y, Color p_OldColor, Color p_NewColor, int p_Float)
/// <summary>
/// 检查色彩(可以根据这个更改比较方式
/// </summary>
/// <param name="p_CurrentlyColor">当前色彩</param>
/// <param name="p_CompareColor">比较色彩</param>
/// <param name="p_Float">溶差</param>
/// <returns></returns>
private static bool ScanColor(Color p_CurrentlyColor, Color p_CompareColor, int p_Float)
#endregion
/// <summary>
/// 将Bitmap对象压缩为JPG图片类型
/// </summary>
/// </summary>
/// <param name="bmp">源bitmap对象</param>
/// <param name="saveFilePath">目标图片的存储地址</param>
/// <param name="quality">压缩质量,越大照片越清晰,推荐80</param>
public static void CompressAsJPG(Bitmap bmp, string saveFilePath, int quality)
/// <summary>
/// 将inputStream中的对象压缩为JPG图片类型
/// </summary>
/// <param name="inputStream">源Stream对象</param>
/// <param name="saveFilePath">目标图片的存储地址</param>
/// <param name="quality">压缩质量,越大照片越清晰,推荐80</param>
public static void CompressAsJPG(Stream inputStream, string saveFilePath, int quality)
#endregion
#region 图片转换
/// <summary>
/// 把Image对象转换为Byte数组
/// </summary>
/// <param name="image">图片Image对象</param>
/// <returns>字节集合</returns>
public static byte[] ImageToBytes(System.Drawing.Image image)
/// <summary>
/// 转换Byte数组到Image对象
/// </summary>
/// <param name="bytes">字节数组</param>
/// <returns>Image图片</returns>
public static System.Drawing.Image ImageFromBytes(byte[] bytes)
/// <summary>
/// 转换地址(文件路径或者URL地址)到Image对象
/// </summary>
/// <param name="url">图片地址(文件路径或者URL地址)</param>
/// <returns>Image对象</returns>
public static System.Drawing.Image ImageFromUrl(string url)
#endregion
2) 辅助类ImageHelper的使用例子代码如下所示
{
//加载图片
string file = FileDialogHelper.OpenImage();
if (!string.IsNullOrEmpty(file))
{
pictureBox1.Image = Image.FromFile(file);
}
}
private void btnWaterMark_Click(object sender, EventArgs e)
{
//图片水印效果
string file = FileDialogHelper.OpenImage();
if (!string.IsNullOrEmpty(file))
{
this.pictureBox2.Image = ImageHelper.WatermarkImage(this.pictureBox1.Image, Image.FromFile(file));
}
}
private void btnTextWatermark_Click(object sender, EventArgs e)
{
//文字水印效果
this.pictureBox2.Image = ImageHelper.WatermarkText(this.pictureBox1.Image, "测试水印效果");
}
private void btnZoom_Click(object sender, EventArgs e)
{
//按比例放大图片
this.pictureBox2.Image = ImageHelper.ResizeImageByPercent(this.pictureBox1.Image, 200);
}
private void btnRotate_Click(object sender, EventArgs e)
{
//旋转图片
this.pictureBox2.Image = ImageHelper.RotateImage(this.pictureBox1.Image, 90);
}
2、弹出打印窗体的预览对话框辅助类 PrintFormHelper
实现效果1)本辅助类主要是用来方便实现窗体界面打印的功能。
2)窗体界面打印提供通用的打印预览功能。
实现代码
1)辅助类提供的方法接口如下所示
/// <summary>
/// </summary>
public class PrintFormHelper
{
/// <summary>
/// 弹出打印窗体的预览对话框
/// </summary>
/// <param name="form"></param>
public static void Print(Form form)
}
2) 辅助类PrintFormHelper的使用例子代码如下所示
{
try
{
this.Cursor = Cursors.WaitCursor;
PrintFormHelper.Print(this);//打印当前窗体
}
catch (Exception ex)
{
MessageBox.Show(this, ex.Message);
}
finally
{
this.Cursor = Cursors.Default;
}
}
2、抓取整个屏幕或指定窗口,并可把抓取的图片保存到文件等操作辅助类 ScreenCapture实现效果
1)本辅助类主要是用来方便实现抓取整个屏幕或指定窗口,并可把抓取的图片保存到文件等操作2)该辅助类类非常方便实现对桌面、指定窗口进行屏幕截图,并可以指定保存路径、指定图片格式、后缀名等属性对截图进行保存,适合用于对屏幕监控等相关的操作中。
实现代码
1)辅助类提供的方法接口如下所示
/// <summary>
/// </summary>
public string ImageSavePath
/// <summary>
/// 图片的后缀名,如果为空,使用图片格式作为后缀名
/// </summary>
public string ImageExtension
/// <summary>
/// 图片保存的格式
/// </summary>
public ImageFormat ImageFormat
/// <summary>
/// 抓取桌面整个屏幕截图到一个图片对象中
/// </summary>
/// <returns></returns>
public Image CaptureScreen()
/// <summary>
/// 抓取桌面整个指定窗口的截图到一个图片对象中
/// </summary>
/// <param name="handle">指定窗口的句柄</param>
/// <returns></returns>
public Image CaptureWindow(IntPtr handle)
/// <summary>
/// 抓取桌面整个指定窗口的截图,并保存到文件中
/// </summary>
/// <param name="handle"></param>
/// <param name="filename"></param>
/// <param name="format"></param>
public void CaptureWindowToFile(IntPtr handle, string filename, ImageFormat format)
/// <summary>
/// 根据属性配置自动保存图片
/// </summary>
public void AutoCaptureScreen()
/// <summary>
/// 抓取桌面整个指定窗口的截图,并保存到文件中
/// </summary>
/// <param name="filename"></param>
/// <param name="format"></param>
public void CaptureScreenToFile(string filename, ImageFormat format)
2)辅助类ScreenCapture的使用例子代码如下所示
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)