C# 如何以编程方式获取 .Net WinForms 控件的屏幕截图？
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How to get a screen capture of a .Net WinForms control programmatically?
提问by user34787
How do you programmatically obtain a picture of a .Net control?
如何以编程方式获取 .Net 控件的图片？
采纳答案by user34787
There's a method on every control called DrawToBitmap. You don't need to p/invoke to do this.
每个控件上都有一个名为DrawToBitmap 的方法。您不需要 p/invoke 来执行此操作。
Control c = new TextBox();
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(c.Width, c.Height);
c.DrawToBitmap(bmp, c.ClientRectangle);
回答by Alan
For WinForms controls that support it, there is a method in the System.Windows.Forms.Control class:
对于支持它的 WinForms 控件，System.Windows.Forms.Control 类中有一个方法：
public void DrawToBitmap(Bitmap bitmap, Rectangle targetBounds);
This does not work with all controls, however. Third party component vendors have more comprehensive solutions.
但是，这不适用于所有控件。第三方组件供应商有更全面的解决方案。
回答by Joey
You can get a picture of a .NET control programmatically pretty easily using the DrawToBitmapmethod of the Control class starting in .NET 2.0
从 .NET 2.0 开始，您可以使用Control 类的DrawToBitmap方法以编程方式轻松获取 .NET 控件的图片
Here is a sample in VB
这是VB中的示例
Dim formImage As New Bitmap("C:\File.bmp")
Me.DrawToBitmap(formImage, Me.Bounds)
And here it is in C#:
这是在 C# 中的：
Bitmap formImage = New Bitmap("C:\File.bmp")
this.DrawToBitmap(formImage, this.Bounds)
回答by Nick
if it's not on the control you're trying to do, you can usually cast it to the base Control class and call the DrawToBitmap method there.
如果它不在您尝试执行的控件上，您通常可以将其转换为基本 Control 类并在那里调用 DrawToBitmap 方法。
回答by Hallgrim
Control.DrawToBitmapwill let you draw most controls to a bitmap. This does not work with RichTextBox and some others.
Control.DrawToBitmap将让您将大多数控件绘制到位图。这不适用于 RichTextBox 和其他一些。
If you want to capture these, or a control that has one of them, then you need to do PInvoke like described in this CodeProject article: Image Capture
如果您想捕获这些或具有其中之一的控件，那么您需要像这篇 CodeProject 文章中描述的那样执行 PInvoke：Image Capture
Take care that some of these methods will capture whatever is on the screen, so if you have another window covering your control you will get that instead.
请注意，其中一些方法将捕获屏幕上的任何内容，因此如果您有另一个窗口覆盖您的控件，您将获得它。
回答by R Muruganandhan
Panel1.Dock = DockStyle.None ' If Panel Dockstyle is in Fill mode
Panel1.Width = 5000 ' Original Size without scrollbar
Panel1.Height = 5000 ' Original Size without scrollbar
Dim bmp As New Bitmap(Me.Panel1.Width, Me.Panel1.Height)
Me.Panel1.DrawToBitmap(bmp, New Rectangle(0, 0, Me.Panel1.Width, Me.Panel1.Height))
'Me.Panel1.DrawToBitmap(bmp, Panel1.ClientRectangle)
bmp.Save("C:\panel.jpg", System.Drawing.Imaging.ImageFormat.Jpeg)
Panel1.Dock = DockStyle.Fill
Note:Its working fine
注意：它工作正常
回答by Mark Lakata
This is how to do it for an entire Form, not just the Client area (which doesn't have the title bar and other dressing)
这是整个Form，而不仅仅是客户区（没有标题栏和其他装饰）的方法
Rectangle r = this.Bounds;
r.Offset(-r.X,-r.Y);
Bitmap bitmap = new Bitmap(r.Width,r.Height);
this.DrawToBitmap(bitmap, r);
Clipboard.SetImage(bitmap);
