本文整理汇总了C#中System.Drawing.Graphics.ReleaseHdc方法的典型用法代码示例。如果您正苦于以下问题：C# Graphics.ReleaseHdc方法的具体用法？C# Graphics.ReleaseHdc怎么用？C# Graphics.ReleaseHdc使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Drawing.Graphics的用法示例。
在下文中一共展示了Graphics.ReleaseHdc方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Rectangle2
[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
private static extern bool Rectangle2(
IntPtr hdc,
int ulCornerX, int ulCornerY,
int lrCornerX, int lrCornerY);
[System.Security.Permissions.SecurityPermission(
System.Security.Permissions.SecurityAction.LinkDemand, Flags =
System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)]
private void GetHdcForGDI2(PaintEventArgs e)
{
// Create pen.
Pen redPen = new Pen(Color.Red, 1);
// Draw rectangle with GDI+.
e.Graphics.DrawRectangle(redPen, 10, 10, 100, 50);
// Get handle to device context.
IntPtr hdc = e.Graphics.GetHdc();
// Draw rectangle with GDI using default pen.
Rectangle2(hdc, 10, 70, 110, 120);
// Release handle to device context.
e.Graphics.ReleaseHdc(hdc);
}示例2: MemoryStream
//引入命名空间
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Windows.Forms;
class CreateMetafileMemory: Form
{
MemoryStream ms = new MemoryStream();
public static void Main()
{
Application.Run(new CreateMetafileMemory());
}
public CreateMetafileMemory()
{
ResizeRedraw = true;
Graphics grfx = CreateGraphics();
IntPtr ipHdc = grfx.GetHdc();
Metafile mf = new Metafile(ms, ipHdc);
grfx.ReleaseHdc(ipHdc);
grfx.Dispose();
grfx = Graphics.FromImage(mf);
grfx.FillEllipse(Brushes.Gray, 0, 0, 100, 100);
grfx.DrawEllipse(Pens.Black, 0, 0, 100, 100);
grfx.DrawArc(new Pen(Color.Red, 10), 20, 20, 60, 60, 30, 120);
grfx.Dispose();
}
protected override void OnPaint(PaintEventArgs pea)
{
DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
}
protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
{
ms.Position = 0;
Metafile mf = new Metafile(ms);
for (int y = 0; y < cy; y += mf.Height)
for (int x = 0; x < cx; x += mf.Width)
grfx.DrawImage(mf, x, y, mf.Width, mf.Height);
}
}