Download file from web vb.net

For example, the file Form1. Verify all inputs before using the data in your application. The contents of the file may not be what is expected, and methods to read from the file may fail.

Use the DownloadFile method to download the file, specifying the target file's location as a string or URI and specifying the location at which to store the file. This example downloads the file WineList. Use the DownloadFile method to download the file, specifying the target file's location as a string or URI, specifying the location at which to store the file, and specifying the time-out interval in milliseconds the default is Use the DownLoadFile method to download the file, specifying the target file's location as a string or URI and specifying the location at which to store the file, the user name, and the password.

The FTP protocol used by the DownLoadFile method sends information, including passwords, in plain text and should not be used for transmitting sensitive information. Skip to main content.

This browser is no longer supported. Download Microsoft Edge More info. Alan Oliveira Jun Member Jun Manoj Nathwani Feb Janilane Aug Tory Netherton Jun GaryWoodfine Mar Member Feb Namazi Nov GaryWoodfine Nov Namazi 7-Nov GaryWoodfine 7-Nov GaryWoodfine Jun Go to top.

Layout: fixed fluid. United Kingdom. First Prev Next. Doesn't work Wrangly Oct Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System. StreamWriter Line Server.

Good function! Alan Oliveira. It's a good function, but it doesn't work with update panel. I'm writting only to alert who will try this with update panel. And a way that works to me, was create another webform without updatePanel, and call this other page to execute the download function. How to apply Styles to word file in asp. Member Hi, Can anyone tell me how to apply styles to the word document in asp.

How to apply Styles to word file from web page Member Jun I have an ASMX file that produces a service that upon providing a key and string returns a specific file based on the key validation and on the string to choose the file. This is working perfectly, but I can't seem to find a way to consume this service on a webform when the user presses a button. I basically what the user to press a button and a file be returned to the browser, allowing him to either save or view the file the file type in question is a PDF.

Also, i'm posting the key when i call the web service, so that the call can be authenticated, but i'm not sure if there is a better way of securing this service, or if there is a way to provide authentication credentials programmatically that is more secure. I need the referred authentication so that the service can be consumed by a partner website, but prevent its access from any other call.

Like a or 4XX status. Have you tried running the code through the debugger and looking a the response in the debugger? I cant find the response on the debugger, since its exactly when the server attempts to read the response that it all halts.

My intent is to provide a way to allow users from a partner website to download files that must remain unavailable to any other attempt to use the web service. These users need to be validated on the partner site, to evaluate if they are allowed to access the file, and then, the partner website must connect to our website via a webservice, providing some sort of credentials or key and the reference to the file to access.

The webservice then checks for the credentials, and if they match, then the service streams the file back to the partner website, where they in return serve it to the user. The web service code that i posted works perfectly when accessed directly via the browser, but we need to provide an example of how to access it programmatically, and i can't seem to make it work from that point of view.

It's hard to understand the intent given the code. The design returns a Ok when there is an error. The client will not expect a response with an HTML error message. Clients will expect or status. Can you explain the technical design? Or are you building a SOAP service? I guess it needs to be REST, since what i need is to validate a request from an external client, making sure it is the allowed client, and in return stream back a specific PDF file according to the data received from the client.

It a bit hacky. SOAP gives you more security options. Frankly, Web API is a far more robust framework and much easier to implement this requirement. The client is pretty simple. I used a standard web form with a button. The client could be a self-submitting form or a basic HTTP request using code. Code client expect a status.

You need to take this into consideration when building your test client. If you don't get a then something went wrong. Again, thx for the example. I had a similar example working with a post and using hidden fields, but that lacks the security for the authentication, since the key is exposed on the hidden field.

This is why i was looking for a way to perform the connection via the codebehind, so that the info not easily accessible. As you can see, i'm now using an handler ashx , and the file arrives at the client, but the encoding seems to always be wrong, no matter what option i set on the code.

I can open the file received with the notepad, and see that the contents are there, but the encoding is always messed, hence preventing the acrobat reader or the browser from opening it. Later on, i realized what could have saved me a lot of trouble Write instead of response. As soon as i changed it, the files started to arrive correctly. I guess the byte array needed to be handed directly, and not reencoded back to a string, to then return it with response.

Do you have solved your problems now? If you still have problems,you could post to us.