Question

我正在尝试调整文件夹中的图像大小。我正在使用的代码是：

string logoUrl = HttpContext.Current.Server.MapPath("DeviceLogo");
System.Drawing.Image SourceLogo = System.Drawing.Image.FromFile(logoUrl + @"\" + objDevice.FileName);

//Create a logo for this device and reseller/client business              
Bitmap newImage = new Bitmap(objDevice.LogoWidth, objDevice.LogoHeight, PixelFormat.Format24bppRgb);
using (Graphics graphics = Graphics.FromImage(newImage))
{
    graphics.CompositingQuality = CompositingQuality.HighQuality;
    graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
    graphics.SmoothingMode = SmoothingMode.HighQuality;
    graphics.DrawImage(SourceLogo, 0, 0, objDevice.LogoWidth, objDevice.LogoHeight);
}
string filepath = HttpContext.Current.Server.MapPath("DeviceLogo");                

//Save the resized image                
newImage.Save(filepath + objDevice.FileName);

问题是图像没有调整大小

Answer 1

using(Image img = Image.FromFile(dlgFichier.FileName))
{
    Image temp = (Image)new Bitmap((Image)img.Clone(), new Size((int)Math.Round(img.Width / ratio), (int)Math.Round(img.Height / ratio)));
    temp.Save("your path");
}

试试这个

/ e在我的情况下，我想应用一个比例来保持比例相同的高度和宽度但你可以用你的值替换（int）Math.Round（img.Height / ratio）

/ ee用你的价值取代了我的价值

using(Image img = Image.FromFile(dlgFichier.FileName))
{
    Image temp = (Image)new Bitmap((Image)img.Clone(), new Size(objDevice.LogoWidth, objDevice.LogoHeight));
    temp.Save("your path");
}

Answer 2

    public void ResizeImage(Device objDevice)
    {
        string OriginalFile, NewFile;

        OriginalFile = HttpContext.Current.Server.MapPath("DeviceLogo") + @"\" + objDevice.FileName;
        NewFile = OriginalFile;

        System.Drawing.Image FullsizeImage = System.Drawing.Image.FromFile(OriginalFile);

        System.Drawing.Image NewImage = FullsizeImage.GetThumbnailImage(objDevice.LogoWidth, objDevice.LogoHeight, null, IntPtr.Zero);

        // Clear handle to original file so that we can overwrite it if necessary
        FullsizeImage.Dispose();

        // Save resized picture
        NewImage.Save(NewFile);
    }

感谢无帮助

使用指定的高度和宽度调整图像大小

2 个答案: