How to generate download file name?

Question

I'm creating asp.net special file manager. all file information saved to SQL Server table. My table is here

Table tFile(
FileID uniqueidentifier,
FileName nvarchar(50),
Extension nvarchar(50))

Upload process is: First i'm insert table row and then upload file to server. Then file renamed to FileID (GUID value). For example : 4a6327c4-0596-4949-a5f2-a639e934d534.JPG

Inserted table row is like this

4a6327c4-0596-4949-a5f2-a639e934d534 | image1 | JPG

And file on the server like this

www.domain.com/aa/Files/4a6327c4-0596-4949-a5f2-a639e934d534.JPG

My problem is when i downloading current file, 4a6327c4-0596-4949-a5f2-a639e934d534.JPG named file was downloaded. I need image1.JPG

When any user downloading current file, how to generate current file name to normal filename like 'image1.jpg'

Answer 1

Have a download.aspx page which takes the GUID of the image as a query string parameter. You can then lookup this value in the database to get the file path and send it to the browser like this:

Response.AddHeader("Content-Disposition", "attachment;filename=image1.jpg");
Response.ContentType = "image/jpeg";
Response.WriteFile(pathToFileOnYourServer);

You can dynamically build the filename=image1.jpg part to call the image anything you like.