C# download file

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I agree to the above terms. Download Required. What our readers say. Error Details. ReadBytes DirectCast fs. Length, Long. ConnectionStrings "constr". Using con As New SqlConnection constr. Using cmd As New SqlCommand query. Add " Name" , SqlDbType.

Add " Data" , SqlDbType. End Using. End Sub. Net GridView. Below is the code which populates the ASP. Net GridView from files saved in the database table. BindGrid ;. ExecuteReader ;. DataBind ;. End If. Private Sub BindGrid. Using cmd As New SqlCommand. Parse sender as LinkButton. CommandArgument ;. Parse TryCast sender, LinkButton. As soon as the page is rendered the Generic Handler will be called and using the ID from the QueryString it will fetch the File data, i.

Name, Content Type and the Byte Array is fetched from the database. Once the data fetching process is completed the file is sent to the browser for downloading using the Response Stream. Note: If the Adobe Reader is not installed in the system, User will not be able to view the files and in such scenario, I have given users option to download the file and hence an additional QueryString parameter download is passed so that the PDF file is downloaded as attachment.

Parse context. QueryString[ "Id" ] ;. AddWithValue " Id" , id ;. Read ;. ToString ;. SetCacheability HttpCacheability. NoCache ;. Write args. WriteLine Environment. Please could you explain why are you using SemaphoreSlim in this context?

Surendra Shrestha Surendra Shrestha 9 9 silver badges 20 20 bronze badges. The file will be saved on the location where the executable file is. If you want full path then use full path along with file which is the filename of the item to be downloaded — Surendra Shrestha. Sample: webClient. I would suggest not using GetIsNetworkAvailable as, in my experience, returns too many false-positives.

In such a case you can use System. OpenRead Uri method to see if it returns when given a default url. See WebClient. OpenRead — haZya. Headers["Content-Disposition"]; if string. GetFileName uri. Create System. Darshit Gandhi Darshit Gandhi 49 7 7 bronze badges. Here is the sample code to download the file.

WriteLine "File has been downloaded. Kiran Shahi Kiran Shahi 6, 6 6 gold badges 31 31 silver badges 64 64 bronze badges. GetAsync url, HttpCompletionOption. Create ; await streamToReadFrom. Headers, requestMessage. Method, requestMessage. Options, requestMessage. RequestUri, requestMessage. Version, requestMessage. Headers, responseMessage. IsSuccessStatusCode, responseMessage. ReasonPhrase, requestMessageInfo, responseMessage. StatusCode, responseMessage. TrailingHeaders, responseMessage. FullMessage , ex2.

FullMessage , WebExceptionStatus. ResponseHeadersRead, cancellationToken ; if! ReadAsync buffer, cancellationToken! WriteAsync buffer. SendAsync httpRequestMessage, cancellationToken ; if! Replace ", see inner exception. Lambda notation and String interpolation has been used: using System. ToBase64String Encoding. WriteLine "Download finished! Kreshnik Kreshnik 2, 5 5 gold badges 29 29 silver badges 38 38 bronze badges. Some comments about the purpose of your code statements would be helpful, for those who are unfamiliar with asynchronous operations and cross-thread calls.

Add "keep-alive" ; client. This response could be from HttpAgilityPack, or WebClient, or Puppeteer lots of options Manually entries from config values or hard coded values. Cryptc Cryptc 1, 1 1 gold badge 11 11 silver badges 14 14 bronze badges. GetAwaiter ; Console.