Resizing and creating a thunbnail from uploaded image

Question

User-544697354 posted

I am using the FileUpload control to upload images to a folder on my server and also store the location in a db table. How can I: 1) check to make sure the files being uploaded are jpgs 2) resize the image to be a thumbnail and also larger at 150x150. Here is my code for the upload

protected void btnUpload_Click(object sender, EventArgs e)

{

try

{

DALBWLoginDataContext db = new DALBWLoginDataContext();

string path = "~\\Assets\\RepImages\\" + Session["UserID"].ToString() + ".jpg";

UserImage um = db.UserImages.SingleOrDefault(a => a.nUserID == Convert.ToInt32(Session["UserID"]));if (um != null)

{

if (File.Exists(path))

{

File.Delete(path);

}

db.UserImages.DeleteOnSubmit(um);

db.SubmitChanges();

}

 

if (FileUpload1.HasFile)

{

string filepath = FileUpload1.PostedFile.FileName;

string pat = @"\\(?:.+)\\(.+)\.(.+)";

Regex r = new Regex(pat);

Match m = r.Match(filepath);

string file_ext = m.Groups[2].Captures[0].ToString();

string filename = m.Groups[1].Captures[0].ToString();

string file = filename + "." + file_ext;string FileToResize = Server.MapPath("~/images/1.jpg");

 

FileUpload1.PostedFile.SaveAs(Server.MapPath("~\\Assets\\RepImages\\") + Session["UserID"].ToString() + ".jpg");

 

StoreImagePath(path);

dvImage.DataBind();

lblStatus.Text = "Received " + FileUpload1.FileName;

}

else

{

lblStatus.Text = "You have not selected a valid upload file.";

}

}

catch (Exception)

{

throw;

}

}

private void StoreImagePath(string path)

{

DALBWLoginDataContext db = new DALBWLoginDataContext();UserImage img = new UserImage();

img.sImageURL = path;

img.nUserID = Convert.ToInt32(Session["UserID"]);

img.nssiCorpID = Convert.ToInt32(Session["ssiCorpID"]);

db.UserImages.InsertOnSubmit(img);

db.SubmitChanges();

}