Obtain the file by downloading it directly, rather than using window.open(url)

I'm currently dealing with some session issues within an ASP.NET application. The main program launches an ASP.NET dialog that includes a link to a PDF document. To "download" this file, I am using the code window.open('myurl/file.pdf');

When this code is executed, a new window opens but the file cannot be downloaded because the session object is not being transferred (it's worth noting that keeping the session in the new window will not work due to its integration within a C# WebBrowser frame).

Is there any way to download the file directly from the link without utilizing window.open()?

javascriptc#asp.netwinforms

Answer №1

If the file exists in the file system, you have the option to simply link to it. However, keep in mind that this may result in the file opening in the browser, depending on the user's setup.

Alternatively, if you prefer not to open a new window and the file is dynamically generated:

  1. Utilize a Button or a LinkButton

  2. In the Click event of your Button/LinkButton, use Response.AddHeader

        Response.AddHeader("content-disposition", "attachment;filename={filename.extension}")
Response.ContentType = "application/{MIME type here}"
    1. Stream the results to the client (you may need to research this further, as I commonly do it with Excel and DataGrids but not as frequently with PDFs)

This approach should prompt the user for the appropriate action...

Answer №2

The issue was successfully resolved by executing window.dialogArguments.MyFunction(url), triggering the MyFunction(url) function in the parent window. Within that window, I utilized window.external.MyFunctionToDotNet(url) to retrieve cookies from my WebBrowser via a WebClient and proceeded to download the file.

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