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Forum Discussion
How to check folder exist or not and how to upload image using URL using C#
Hello there, I am using Dropbox.Api. I want to check if folder exist or not. I tired using try and catch block but I think there should be a better way for doing this. Here is my try catch block: ...
Didn't get much about SvaeUrlAsync but I used this and it worked perfectly.
List<Images> fiveElements = Images.GetRange(0, 5); foreach (var image in fiveElements) { WebClient webclient = new WebClient(); var stream = new MemoryStream(webclient.DownloadData(image.ImageURL)); var fileName = "Test1.jpg"; var response = await client.Files.UploadAsync(path + "/" + fileName, WriteMode.Overwrite.Instance, true, body: stream); }And for try catch I used your code but not working well as it throws me out of this method and goes to catch(Exception e) of parent method.
try { await client.Files.GetMetadataAsync(path); } catch (ApiException<Dropbox.Api.Files.GetMetadataError> e) { if (e.ErrorResponse.IsPath && e.ErrorResponse.AsPath.Value.IsNotFound) { Console.WriteLine("Nothing found at path."); } else { // different issue; handle as desired Console.WriteLine(e); } }Please let me know where I am going wrong.
Thank you.Thank you so much for the help. Using await and removing result worked for me.
try { await client.Files.GetMetadataAsync(path); } catch (ApiException<Dropbox.Api.Files.GetMetadataError> e) { if (e.ErrorResponse.IsPath && e.ErrorResponse.AsPath.Value.IsNotFound) { Console.WriteLine("Nothing found at path."); } else { // different issue; handle as desired Console.WriteLine(e); } }
Greg-DB
Dropbox Staff
Dropbox StaffI don't have a sample available for that unfortunately. The basic idea is to call SaveUrlAsync with the 'path' for where you want to save the file, and the 'url' for the hosted file data to save. Then, if the SaveUrlResult gives you an AsyncJobId, call SaveUrlCheckJobStatusAsync ocasionally to check on the job status.
Please give that a try and let me know if something isn't working as expected.
And yes, using the try/catch pattern is a good way to do that existence check.
Didn't get much about SvaeUrlAsync but I used this and it worked perfectly.
List<Images> fiveElements = Images.GetRange(0, 5);
foreach (var image in fiveElements)
{
WebClient webclient = new WebClient();
var stream = new MemoryStream(webclient.DownloadData(image.ImageURL));
var fileName = "Test1.jpg";
var response = await client.Files.UploadAsync(path + "/" + fileName, WriteMode.Overwrite.Instance, true, body: stream);
}And for try catch I used your code but not working well as it throws me out of this method and goes to catch(Exception e) of parent method.
try
{
await client.Files.GetMetadataAsync(path);
}
catch (ApiException<Dropbox.Api.Files.GetMetadataError> e)
{
if (e.ErrorResponse.IsPath && e.ErrorResponse.AsPath.Value.IsNotFound)
{
Console.WriteLine("Nothing found at path.");
}
else
{
// different issue; handle as desired
Console.WriteLine(e);
}
}Please let me know where I am going wrong.
Thank you.
- Greg-DBI think that's because you're using '.Result' instead of 'await'. That's more of a general C# exception handling matter though, so I can't provide much insight there. You'll probably need to change how you structure your exception handling, or switch to using 'await'.
Thank you so much for the help. Using await and removing result worked for me.
try { await client.Files.GetMetadataAsync(path); } catch (ApiException<Dropbox.Api.Files.GetMetadataError> e) { if (e.ErrorResponse.IsPath && e.ErrorResponse.AsPath.Value.IsNotFound) { Console.WriteLine("Nothing found at path."); } else { // different issue; handle as desired Console.WriteLine(e); } }
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