How to append key to an image's name asp.net mvc - asp.net-mvc

Question

Here is my code to append postfix to an image:
private void SaveUpload(SledBuck sledBuck )
{
if (Request.Files.Count > 0)
{
var postFix = "_" + sledBuck.Id;
for (var index = 0; index < Request.Files.Count; index++)
{
if (Request.Files[index].ContentLength > 0)
{
var hpf = Request.Files[index];
var postedFileName = string.Format("{0}-{1}", Path.GetFileName(hpf.FileName), postFix);
string folderPath = ConfigurationManager.AppSettings["ImagePath"];
var savedFileName = Path.Combine(Server.MapPath(folderPath), postedFileName);
hpf.SaveAs(savedFileName); // Save the file
}
}
}
}
Let's say the image's name is image.jpg. I want to append primary key to it's name before updating it like image_1.jpg. For the code above the postedFileName = image.jpg_1 which is not what I want. How can I append the Id properly?

Answer 1

so basically what you get as hpf.FileName is FileName + Extension. You need to get the extension and work accordingly,
so proceed like this :
var hpf = Request.Files[index];
var FileExtension = Path.GetExtension(hpf.FileName);
var FileNameWithoutExtension = hpf.FileName.Replace(FileExtension, "");
var FileUniqueName = String.Format("{0}_{1}{2}", FileNameWithoutExtension, GenerateDateTimeStamp(), FileExtension);
string folderPath = ConfigurationManager.AppSettings["ImagePath"];
var savedFileName = Path.Combine(Server.MapPath(folderPath), FileUniqueName);
hpf.SaveAs(savedFileName); // Save the file
where GenerateDateTimeStamp() is
public string GenerateDateTimeStamp()
{
return DateTime.Now.ToString("ddmmyyyyMMhhssttt");
}
in here you can have your primary keys aswell.
this should give you some idea