Saving as jpeg from memorystream in c#
22,570
Solution 1
Resize the Image and Save it
Private void ResizeImage(Image img, double maxWidth, double maxHeight)
{
double srcWidth = img.Source.Width;
double srcHeight = img.Source.Height;
double resizeWidth = srcWidth;
double resizeHeight = srcHeight;
double aspect = resizeWidth / resizeHeight;
if (resizeWidth > maxWidth)
{
resizeWidth = maxWidth;
resizeHeight = resizeWidth / aspect;
}
if (resizeHeight > maxHeight)
{
aspect = resizeWidth / resizeHeight;
resizeHeight = maxHeight;
resizeWidth = resizeHeight * aspect;
}
img.Width = resizeWidth;
img.Height = resizeHeight;
}
You could use this code to Resize the image to the required Dimention Before saving it
Solution 2
As others have mentioned, if you want all images to be the same size without distortion, you're going to need to resize while maintaining the aspect ratio. See this function below:
public Image ResizeWithSameRatio(Image image, float width, float height)
{
// the colour for letter boxing, can be a parameter
var brush = new SolidBrush(Color.Black);
// target scaling factor
float scale = Math.Min(width / image.Width, height / image.Height);
// target image
var bmp = new Bitmap((int)width, (int)height);
var graph = Graphics.FromImage(bmp);
var scaleWidth = (int)(image.Width * scale);
var scaleHeight = (int)(image.Height * scale);
// fill the background and then draw the image in the 'centre'
graph.FillRectangle(brush, new RectangleF(0, 0, width, height));
graph.DrawImage(image, new Rectangle(((int)width - scaleWidth)/2, ((int)height - scaleHeight)/2, scaleWidth, scaleHeight));
return bmp;
}
Now your usage function can be significantly simplified (assuming 1024x768 target images here):
public void SaveFileOnDisk(MemoryStream ms, string FileName)
{
try
{
string appPath = HttpContext.Current.Request.ApplicationPath;
string physicalPath = HttpContext.Current.Request.MapPath(appPath);
string strpath = physicalPath + "\\Images";
string WorkingDirectory = strpath;
using (var original = Image.FromStream(ms))
using (var resized = ResizeWithSameRatio(original, 1024, 768))
{
resized.Save(WorkingDirectory + "\\" + FileName + ".jpg");
}
}
catch (Exception ex)
{
//lblMsg.Text = "Please try again later.";
}
}
Note the added simplification in terms of number of variables, and disposing by using using
instead of Dispose()
.
Author by
acadia
Updated on May 19, 2020Comments
-
acadia almost 4 years
I have a method as shown below to save image as jpeg. I want to save all the pictures with the same height and width without it getting distorted.
How can I do that? Please help
public void SaveFileOnDisk(MemoryStream ms, string FileName) { try { string appPath = HttpContext.Current.Request.ApplicationPath; string physicalPath = HttpContext.Current.Request.MapPath(appPath); string strpath = physicalPath + "\\Images"; string WorkingDirectory = strpath; System.Drawing.Image imgSave = System.Drawing.Image.FromStream(ms); Bitmap bmSave = new Bitmap(imgSave); Bitmap bmTemp = new Bitmap(bmSave); Graphics grSave = Graphics.FromImage(bmTemp); grSave.DrawImage(imgSave, 0, 0, imgSave.Width, imgSave.Height); bmTemp.Save(WorkingDirectory + "\\" + FileName + ".jpg"); imgSave.Dispose(); bmSave.Dispose(); bmTemp.Dispose(); grSave.Dispose(); } catch (Exception ex) { //lblMsg.Text = "Please try again later."; } }