Billede resize

Kode 

try
{
    string savePath = Request.MapPath("Sti/Hvor/Billedet/Skal/Gemmes/" + billedeFileUpload.FileName);

    Bitmap img = new Bitmap(billedeFileUpload.FileContent);
    Graphics g = Graphics.FromImage(img);
    
    int maxWidth = 200;
    int maxHeight = 150;

    //Resize if width > maxWidth
    if (img.Width > maxWidth)
    {
        float aspectRatio = (float)img.Width / (float)img.Height;
        int newHeight = (int)(maxWidth / aspectRatio);
        Bitmap tmpImg = new Bitmap(100, newHeight);
        Graphics.FromImage(tmpImg).DrawImage(img, 0, 0, maxWidth, newHeight);
        img = tmpImg;
    }

    //Resize if height > maxHeight
    if (img.Height > maxHeight)
    {
        float aspectRatio = (float)img.Width / (float)img.Height;
        int newWidth = (int)(maxHeight * aspectRatio);
        Bitmap tmpImg = new Bitmap(newWidth, maxHeight);
        Graphics.FromImage(tmpImg).DrawImage(img, 0, 0, newWidth, maxHeight);
        img = tmpImg;
    }

    img.Save(savePath);
}
catch
{ }

Hej Aske

Man kunne gøre noget i den her stil:

Kode 

try
{
    string savePath = Request.MapPath("Sti/Hvor/Billedet/Skal/Gemmes/" + billedeFileUpload.FileName);

    Bitmap img = new Bitmap(billedeFileUpload.FileContent);
    Graphics g = Graphics.FromImage(img);
    
    int maxWidth = 200;
    int maxHeight = 150;

    //Resize if width > maxWidth
    if (img.Width > maxWidth)
    {
        float aspectRatio = (float)img.Width / (float)img.Height;
        int newHeight = (int)(maxWidth / aspectRatio);
        Bitmap tmpImg = new Bitmap(100, newHeight);
        Graphics.FromImage(tmpImg).DrawImage(img, 0, 0, maxWidth, newHeight);
        img = tmpImg;
    }

    //Resize if height > maxHeight
    if (img.Height > maxHeight)
    {
        float aspectRatio = (float)img.Width / (float)img.Height;
        int newWidth = (int)(maxHeight * aspectRatio);
        Bitmap tmpImg = new Bitmap(newWidth, maxHeight);
        Graphics.FromImage(tmpImg).DrawImage(img, 0, 0, newWidth, maxHeight);
        img = tmpImg;
    }

    img.Save(savePath);
}
catch
{ }

Forudsat at du anvender en FileUpload control.

Kode 

Bitmap img = new Bitmap(FileUpload_billede.FileContent);

        float newWidth = 0;
        float newHeight = 0;
        float ratio = 0;

        float maxWidth = 800;
        float maxHeight = 500;

        if (img.Width > maxWidth || img.Height > maxHeight) //hvis billedet er for stort
        {
            if (img.Width > img.Height) //hvis billedet er for bredt
            {
                newWidth = maxWidth;
                ratio = img.Width / maxWidth;
                newHeight = img.Height / ratio;

                if (newHeight > maxHeight) //hvis billeder stadig er for højt
                {
                    newHeight = maxHeight;
                    ratio = img.Height / maxHeight;
                    newWidth = img.Width / ratio;
                }
            }

            else if (img.Height > img.Width) //hvis billedet er for højt
            {
                newHeight = maxHeight;
                ratio = img.Height / maxHeight;
                newWidth = img.Width / ratio;

                if (newWidth > maxWidth) //hvis billedet stadig er for bredt
                {
                    newWidth = maxWidth;
                    ratio = img.Width / maxWidth;
                    newHeight = img.Height / ratio;
                }
            }
            
            else //hivs billedet er lige så højt som bredt
            {
                newWidth = maxWidth;
                newHeight = maxHeight;
            }
        }

        Bitmap tmpImg = new Bitmap(Convert.ToInt16(newWidth), Convert.ToInt16(newHeight));
        Graphics.FromImage(tmpImg).DrawImage(img, 0, 0, newWidth, newHeight);

        img = tmpImg;

        img.Save(Server.MapPath("billeder/" + FileUpload_billede.FileName));