在C#中使用RotateFlip旋转图像 [英] Rotate Image using RotateFlip in C#

问题描述

我有这段代码可以在C#Windows Form应用程序的if循环中旋转图像，但是Form在表单输出中不显示任何内容.

I have this code to rotate an image in an if loop in C# Windows Form application, but the Form does not show anything in the form output.

任何人都可以帮忙吗?

this.splitContainer1.Panel2.Controls.Add(PictureBox1);
PictureBox1.SizeMode = PictureBoxSizeMode.AutoSize;
PictureBox1.Image = bitmap; //Image.FromFile(@"C:\image.jpg");
PictureBox1.SizeMode = PictureBoxSizeMode.AutoSize;
PictureBox1.Image = (Image)(RotateImg(bitmap, 30.0f, Color.Transparent));

推荐答案

如果需要以公共角度旋转图像，则可以轻松使用RotateFlip方法.请查看我的示例代码:

if you need to rotate an image on common angles you can use RotateFlip method with ease. Please see my sample code:

string fileName = "somefile.png";
System.Drawing.Imaging.ImageFormat imageFormat = System.Drawing.Imaging.ImageFormat.Png;
Bitmap bitmap =(Bitmap)Bitmap.FromFile(fileName );
//this will rotate image to the left...
bitmap.RotateFlip(RotateFlipType.Rotate270FlipNone);
//lets save result back to file...
bitmap.Save(fileName, imageFormat);
bitmap.Dispose();

仅此而已，希望对您有所帮助.

That's all, hope it helps.

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