问题
I have an ASP.NET Web API project that I'm building that requires uploading word documents using Azure blob storage. I have a method that creates a user profile but unfortunately, I'm encountering issues related to azure blob storage and uploading a document. When debugging, the IFormFile document is null, and the connection to azure is null as well. I can't figure out where the disconnect is. I'd appreciate if someone knows the solution. Below is the code that I've written.
Model
Person Model
public int Id {get; set;}
public string FirstName {get; set;}
public string LastName {get;set;}
public string URL {get;set;}
public string DocName {get;set;}
public string IFormFile[] DocUpload {get;set;}
Repository
public class DocRepo : IDocRepo
{
private CloudStorageAccount storageAccount = null;
private CloudBlobContainer cloudBlobContainer = null;
public IConfiguration _config { get; }
private readonly ILogger _logger;
public DocRepo(ILogger logger)
{
_logger = logger;
}
public void Configure()
{
var AzConnectionString = _config["AzConnectionString"];
if (CloudStorageAccount.TryParse(AzConnectionString, out storageAccount))
{
try
{
CloudBlobClient cloudBlobClient = storageAccount.CreateCloudBlobClient();
cloudBlobContainer = cloudBlobClient.GetContainerReference("folder");
cloudBlobContainer.CreateAsync().GetAwaiter().GetResult();
BlobContainerPermissions permissions = new BlobContainerPermissions
{
PublicAccess = BlobContainerPublicAccessType.Blob
};
cloudBlobContainer.SetPermissionsAsync(permissions).GetAwaiter().GetResult();
}
catch (StorageException ex)
{
_logger.LogError("Error returned from the service: {0}", ex);
}
_logger.LogInformation("Success");
}
else
{
_logger.LogInformation("No Connection");
}
}
public async Task Upload(IFormFile[] docuFile)
{
Person person = new Person();
person.DocUpload = docuFile;
List<string> url = new List<string>();
List<string> docName = new List<string>();
try
{
if (docuFile != null)
{
foreach (var file in docuFile)
{
if (file.ContentType == "application/msword")
{
if (file.Length < 5 * 1400 * 1400)
{
var parsedContentDisposition = ContentDispositionHeaderValue.Parse(file.ContentDisposition);
var filename = parsedContentDisposition.FileName.Trim('"');
docName.Add(filename);
filename = Guid.NewGuid().ToString() + "-" + filename;
CloudBlockBlob cloudBlockBlob = cloudBlobContainer.GetBlockBlobReference(filename);
cloudBlockBlob.Properties.ContentType = file.ContentType;
await cloudBlockBlob.UploadFromStreamAsync(file.OpenReadStream());
url.Add(cloudBlockBlob.Uri.AbsoluteUri);
}
else
{
_logger.LogInformation("5 mb max size allowed");
}
}
else
{
_logger.LogInformation("Only .doc format accepted");
}
}
person.URL = (urls.Count > 0) ? string.Join(" || ", urls) : null;
person.DocName = string.Join(" || ", name);
}
}
catch (Exception ex)
{
_logger.LogError(ex, "Error uploading");
}
}
Interface
public interface IDocRepo
{
void Configure();
Task Upload(IFormFile[] doc);
}
PersonController
[HttpPost]
public async Task<IActionResult> Create([FromBody] Person person)
{
if (ModelState.IsValid)
{
try
{
_docRepo.CreateConfigure();
await _docRepo.Upload(person.DocUpload);
_context.Person.Add(person);
await _context.SaveChanges();
}
catch (Exception ex)
{
throw ex;
}
}
return CreatedAtAction("PersonCreated", new { id = person.Id }, person);
}
回答1:
I made few changes to your code and removed some compilation errors. Take a look a this code. I am able to upload files ( tested with postman ). I removed some of the config code( used connection string directly in code" but that shouldn't affect main code.
Person Model
namespace WebApplication8.Models
{
public class Person
{
public int Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string URL { get; set; }
public string DocName { get; set; }
public IList<IFormFile> docs {get;set;}
}
}
DeleteRequest Model
namespace WebApplication8.Models
{
public class DeleteRequest
{
public string container;
public IList<string> docs;
}
}
PersonController
[Route("api/Person")]
public class PersonController : Controller
{
private readonly ILogger<PersonController> _logger;
private readonly IDocRepo _docRepo;
public PersonController(ILogger<PersonController> logger, IDocRepo docRepo)
{
_logger = logger;
_docRepo = docRepo;
}
[HttpPost]
public async Task<IActionResult> Create([FromForm] Person person)
{
if (ModelState.IsValid)
{
try
{
_docRepo.Configure();
await _docRepo.Upload(person.docs);
//_context.Person.Add(person);
//await _context.SaveChanges();
}
catch (Exception ex)
{
throw ex;
}
return Ok();
}
else
{
return BadRequest();
}
}
}
[HttpDelete]
public async Task<IActionResult> Delete([FromBody] DeleteRequest deleteRequest)
{
if (ModelState.IsValid)
{
try
{
_docRepo.Configure();
await _docRepo.Delete(deleteRequest.docs);
}
catch (Exception ex)
{
throw ex;
}
return Ok();
}
else
{
return BadRequest();
}
}
IDocRepo and DocRepo
public interface IDocRepo
{
void Configure();
Task Upload(IList<IFormFile> pdfFiles);
Task Delete(IList<string> docs);
}
public class DocRepo : IDocRepo
{
private CloudStorageAccount storageAccount = null;
private CloudBlobContainer cloudBlobContainer = null;
private readonly ILogger<DocRepo> _logger;
public DocRepo(ILogger<DocRepo> logger)
{
_logger = logger;
}
public void Configure()
{
var AzConnectionString = "<<Add your connection string >>";
if (CloudStorageAccount.TryParse(AzConnectionString, out storageAccount))
{
try
{
CloudBlobClient cloudBlobClient = storageAccount.CreateCloudBlobClient();
cloudBlobContainer = cloudBlobClient.GetContainerReference("folder");
cloudBlobContainer.CreateAsync().GetAwaiter().GetResult();
BlobContainerPermissions permissions = new BlobContainerPermissions
{
PublicAccess = BlobContainerPublicAccessType.Blob
};
cloudBlobContainer.SetPermissionsAsync(permissions).GetAwaiter().GetResult();
}
catch (StorageException ex)
{
_logger.LogError("Error returned from the service: {0}", ex);
}
_logger.LogInformation("Success");
}
else
{
_logger.LogInformation("No Connection");
}
}
public async Task Upload(IList<IFormFile> docs)
{
//Person person = new Person();
//person.docs = new List<IFormFile>(docs);
List<string> url = new List<string>();
List<string> docName = new List<string>();
try
{
if (docs != null)
{
foreach (var file in docs)
{
if (file.ContentType == "application/msword")
{
if (file.Length < 5 * 1400 * 1400)
{
var parsedContentDisposition = ContentDispositionHeaderValue.Parse(file.ContentDisposition);
var filename = parsedContentDisposition.FileName.Trim('"');
docName.Add(filename);
filename = Guid.NewGuid().ToString() + "-" + filename;
CloudBlockBlob cloudBlockBlob = cloudBlobContainer.GetBlockBlobReference(filename);
cloudBlockBlob.Properties.ContentType = file.ContentType;
await cloudBlockBlob.UploadFromStreamAsync(file.OpenReadStream());
url.Add(cloudBlockBlob.Uri.AbsoluteUri);
}
else
{
_logger.LogInformation("5 mb max size allowed");
}
}
else
{
_logger.LogInformation("Only .doc format accepted");
}
}
//person.URL = (url.Count > 0) ? string.Join(" || ", url) : null;
//person.DocName = string.Join(" || ", file.);
}
}
catch (Exception ex)
{
_logger.LogError(ex, "Error uploading");
}
}
}
public async Task Delete(IList<string> docs)
{
foreach (var doc in docs)
{
try
{
CloudBlockBlob blockBlob = cloudBlobContainer.GetBlockBlobReference(doc);
await blockBlob.DeleteIfExistsAsync();
}
catch (Exception ex)
{
_logger.LogError(ex, "Error deleting blob " + doc);
}
}
}
changed snippet from Startup.cs
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc();
services.AddScoped<IDocRepo, DocRepo>();
}
来源：https://stackoverflow.com/questions/54498973/asp-net-web-api-azure-blob-storage-unstructured