About Download code in mvc

Guest User

hello Everyone,

Hope everyone is fine.

I am working in mvc and sql database.I am using following code to download a file, but it is giving "An exception occurred during a WebClient request" error or Sometimes "Given path format not supported" error.

The file is stored on Azure Storage and so it has online file url.

string remoteUri = "https://[Storagename].blob.core.windows.net/[ContainerName]/";

string fileName = [FileName], myStringWebResource = null;

// Create a new WebClient instance.

WebClient myWebClient = new WebClient();

// Concatenate the domain with the Web resource filename.

myStringWebResource = remoteUri + [FileName];

Console.WriteLine("Downloading File \"{0}\" from \"{1}\" .......\n\n", [FileName], myStringWebResource);

// Download the Web resource and save it into the current filesystem folder.

myWebClient.DownloadFile(myStringWebResource, fileName);

3 Replies

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Laxmidhar Sahoo6y ago
Hi

I am not aware about your mobile os .So may use javascript anchor .
function downloadBlob(blob, filename) {
  // Create an object URL for the blob object
  const url = URL.createObjectURL(blob);

  // Create a new anchor element
  const a = document.createElement('a');

  // Set the href and download attributes for the anchor element
  // You can optionally set other attributes like `title`, etc
  // Especially, if the anchor element will be attached to the DOM
  a.href = url;
  a.download = filename || 'download';

  // Click handler that releases the object URL after the element has been clicked
  // This is required for one-off downloads of the blob content
  const clickHandler = () => {
    setTimeout(() => {
      URL.revokeObjectURL(url);
      this.removeEventListener('click', clickHandler);
    }, 150);
  };

  // Add the click event listener on the anchor element
  // Comment out this line if you don't want a one-off download of the blob content
  a.addEventListener('click', clickHandler, false);

  // Programmatically trigger a click on the anchor element
  // Useful if you want the download to happen automatically
  // Without attaching the anchor element to the DOM
  // Comment out this line if you don't want an automatic download of the blob content
  a.click();

  // Return the anchor element
  // Useful if you want a reference to the element
  // in order to attach it to the DOM or use it in some other way
  return a;
}
Thanks and regards
0
Guest User6y ago
Hey Laxmidhar Sahoo,
Thank you for your reply
I got your point of setting the destination path in computer's downloads folder and it worked for me.
But what if i open that link in my mobile phone and want to download file in mobile, like how we download google image.
I have also tried MemoryStream code , but could fix my download issue.
using (MemoryStream ms = new MemoryStream())
{
blockBlob.DownloadToStream(ms);
return ms.ToArray();
}

Also, i want to download that file from Azure Explorer through C#, i was able to upload files but not able to download

Thank you
+1
Laxmidhar Sahoo6y ago
Hi

webclient second argument should be the full where the file will be downloaded
using System.Net;

WebClient webClient = new WebClient();
webClient.DownloadFile("http://mysite.com/myfile.txt", @"c:\myfile.txt");
Thanks and regards
+1