ASP.NET Image uploading with Resizing

Question

I have an aspx page which will upload images to server harddisk from client pc

But now i need to change my program in such a way that it would allow me to resize the

Answer 1

using System.IO;
using System.Drawing;
using System.Drawing.Imaging;

public partial class admin_AddPhoto : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

        string reportPath = Server.MapPath("../picnic");

        if (!Directory.Exists(reportPath))
        {
            Directory.CreateDirectory(Server.MapPath("../picnic"));
        }
    }

    protected void PhotoForm_ItemInserting(object sender, FormViewInsertEventArgs e)
    {
        FormView uploadForm = sender as FormView;
        FileUpload uploadedFile = uploadForm.FindControl("uploadedFile") as FileUpload;

        if (uploadedFile != null)
        {
            string fileName = uploadedFile.PostedFile.FileName;
            string pathFile = System.IO.Path.GetFileName(fileName);

            try
            {
                uploadedFile.SaveAs(Server.MapPath("../picnic/") + pathFile);
            }
            catch (Exception exp)
            {
                //catch exception here
            }

            try
            {
                Bitmap uploadedimage = new Bitmap(uploadedFile.PostedFile.InputStream);

                e.Values["ImageWidth"] = uploadedimage.Width.ToString();
                e.Values["ImageHeight"] = uploadedimage.Height.ToString();
                // Make output File Name
                char[] splitter = { '.' };
                string[] splitFile = pathFile.Split(splitter);
                string OutputFilename = splitFile[0] + "s";

                System.Drawing.Image.GetThumbnailImageAbort myCallback = new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);
                System.Drawing.Image thumbImage = uploadedimage.GetThumbnailImage(74, 54, myCallback, IntPtr.Zero);
                thumbImage.Save(Server.MapPath("../picnic/") + OutputFilename + ".jpg");
                e.Values["Thumbnail"] = "./picnic/" + OutputFilename + ".jpg";
            }
            catch (Exception ex)
            {
                //catch exception here
            }

            e.Values["Pic"] = "./picnic/" + pathFile;
            e.Values["Url"] = "./picnic/" + pathFile;
            e.Values["dateEntered"] = DateTime.Now.ToString();
        }
    }

    public bool ThumbnailCallback()
    {
        return false;
    }
}

This uses a FileUpload and a FormView to insert. Then I use the GetThumnailImage() method provided in System.Drawing.Imaging. You can enter any Width and Height values and it will shrink/stretch accordingly.

uploadedimage.GetThumbnailImage(W, H, myCallback, IntPtr.Zero);

Hope this helps.