Question

在C#中,图像缩放后如何返回一个Image类的值？

Answer 1

image.GetThumbnailImage() 方法返回的还是Image类型，具体看以下示例代码

private Image GetThumbnail(string base64String, int width, int height)
{

byte[] imageBytes = Convert.FromBase64String(base64String);
MemoryStream ms = new MemoryStream(imageBytes, 0, imageBytes.Length);

// Convert byte[] to Image
ms.Write(imageBytes, 0, imageBytes.Length);

Image image = Image.FromStream(ms, true);

Image.GetThumbnailImageAbort myCallback = new Image.GetThumbnailImageAbort(ThumbnailCallback);

Image thumbnail = image.GetThumbnailImage(width, height, myCallback, IntPtr.Zero);

ms.Close();
ms.Dispose();

image.Dispose();

return thumbnail;
}

public bool ThumbnailCallback()
{
return false;
}