Question

我想将图像上传到模拟器Azure Blob存储帐户（devstoreaccount1）。这是 index.html 代码：

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>App</title>
</head>
<body>

    <div id="body">
        <form name="form1" method="post" action="api/photo" enctype="multipart/form-data">
            <div>
                <label>
                    Browse File
                </label>
                <input name="myFile" type="file" />
            </div>
            <div>
                <input type="submit" value="Upload" />
            </div>
        </form>
    </div>

</body>
</html>

这是我的Web Api控制器的Post方法

public HttpResponseMessage Post() {
            // Retrieve storage account from connection-string
            CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
                CloudConfigurationManager.GetSetting("CloudStorageConnectionString"));

            // Create the blob client 
            CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

            // Retrieve a reference to a container 
            // Container name must use lower case
            CloudBlobContainer container = blobClient.GetContainerReference("mycontainer");

            // Create the container if it doesn't already exist

            container.CreateIfNotExists();
            // Enable public access to blob
            var permissions = container.GetPermissions();
            if (permissions.PublicAccess == BlobContainerPublicAccessType.Off) {
                permissions.PublicAccess = BlobContainerPublicAccessType.Blob;
                container.SetPermissions(permissions);

            }

            // Check if the request contains multipart/form-data. 
            if (!Request.Content.IsMimeMultipartContent()) {
                throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
            }


            HttpResponseMessage result = null;
            var httpRequest = HttpContext.Current.Request;

            if (httpRequest.Files.Count > 0) {
                var docfiles = new List<string>();
                foreach (string file in httpRequest.Files) {
                    var postedFile = httpRequest.Files[file];
                    var filename = postedFile.FileName;
                    var blob = container.GetBlockBlobReference(filename);
                    var filePath = HttpContext.Current.Server.MapPath("~/" + filename);
                    postedFile.SaveAs(filePath);
                    docfiles.Add(filePath);
                    using (var filestream = File.OpenRead(filePath)) {
                        blob.UploadFromStream(filestream);
                    }
                    File.Delete(filename);
                }
                result = Request.CreateResponse(HttpStatusCode.Created, docfiles);
            }
            else {
                result = Request.CreateResponse(HttpStatusCode.BadRequest);
            }
            return result;
        }

因此，当我运行服务器并尝试上传存储在我的文件系统中的图像时，应用程序会抛出此异常：

Eccezione di tipo'System.IO.FileLoadException'in   Microsoft.WindowsAzure.Storage.dll non gestita nel codice utente

Ulteriori informazioni：Impossibile caricare il file o l'assembly   'Microsoft.Data.Services.Client，Version = 5.6.0.0，Culture = neutral，   PublicKeyToken = 31bf3856ad364e35'o una delle relative dipendenze。啦   definizione di manifesto dell'assembly specificato non corrisponde al   riferimento all'assembly。（Eccezione da HRESULT：0x80131040）

此时：

container.CreateIfNotExists();

请帮我修复它或找到另一种方法，使用rest api将图像上传到blob存储区。

Answer 1

而不是使用：

container.CreateIfNotExists();

尝试使用：

if (!container.Exists())
   container.Create();

将文件上载到azure blob存储时出现FileLoadException

1 个答案: