Azure在上载文件时，引发异常“指定的Blob不存在”

如何解决Azure在上载文件时，引发异常“指定的Blob不存在”

我通过.net核心开发了一个应用程序。我将Azure存储用于文件。但是有时代码会产生期望：指定的blob不存在。

这是我开始文件上传过程的方式：

entity = FileUploadBusinessRule.UploadFile(entity,companyInformationEntityRequestDto.BusinessLicenseBase64,"BusinessLicenseUrl");

entity = FileUploadBusinessRule.UploadFile(entity,companyInformationEntityRequestDto.CompanyLogoBase64,"CompanyLogoUrl");

FileUploadBusinessRule.UploadFile：

public static class FileUploadBusinessRule
{
    public static T UploadFile<T>(T entity,string file,string propName)
    {
        IStorageService _storageService = DependencyContainerHelper.Container.Resolve<IStorageService>();

        Type t = entity.GetType();
        var propertyValue = t?.GetProperty(propName)?.GetValue(entity)?.ToString();


        if (!file.IsNullOrEmpty())
        {
            if (file.Contains("http://") || file.Contains("https://"))
                return entity;

            if (!propertyValue.IsNullOrEmpty())
                _storageService.DeleteBlobData(propertyValue);

            t?.GetProperty(propName)?.SetValue(entity,_storageService.UploadFileByBase64String(file));
        }
        else
        {
            if (!propertyValue.IsNullOrEmpty())
                _storageService.DeleteBlobData(propertyValue);
        }

        return entity;
    }
}

_storageService.UploadFileByBase64String：

public string UploadFileByBase64String(string strBase64)
    {
        var byteArray = strBase64.Base64ToByteArray();
        var mimeType = strBase64.GetMIMETypeFromBase64();
        var fileName = Guid.NewGuid().ToString() + "." + strBase64.GetExtensionFromBase64();
        return this.UploadFile(fileName,byteArray,mimeType);
    }

上传文件：

public string UploadFile(string strFileName,byte[] fileData,string fileMimeType)
    {
        try
        {
            var _task = Task.Run(() => this.UploadFileToBlobAsync(strFileName,fileData,fileMimeType));
            _task.Wait();
            string fileUrl = _task.Result;
            return fileUrl;
        }
        catch (Exception ex)
        {
            throw (ex);
        }
    }

UploadFileToBlobAsync：

private async Task<string> UploadFileToBlobAsync(string strFileName,string fileMimeType)
    {
        try
        {
            CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(accessKey);
            CloudBlobClient cloudBlobClient = cloudStorageAccount.CreateCloudBlobClient();
            string strContainerName = "files";
            CloudBlobContainer cloudBlobContainer = cloudBlobClient.GetContainerReference(strContainerName);
            string fileName = this.GenerateFileName(strFileName);
            if (await cloudBlobContainer.CreateIfNotExistsAsync())
            {
                await cloudBlobContainer.SetPermissionsAsync(new BlobContainerPermissions { PublicAccess = BlobContainerPublicAccessType.Container });
            }

            if (fileName != null && fileData != null)
            {
                CloudBlockBlob cloudBlockBlob = cloudBlobContainer.GetBlockBlobReference(fileName);
                cloudBlockBlob.Properties.ContentType = fileMimeType;
                await cloudBlockBlob.UploadFromByteArrayAsync(fileData,fileData.Length);
                return cloudBlockBlob.Uri.AbsoluteUri;
            }
            return "";
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }

当代码执行第一行（实体= FileUploadBusinessRul ... blabla）时，应用程序可以成功上传文件。但是，当执行第二行时，它将在此行中引发异常：

if (await cloudBlobContainer.CreateIfNotExistsAsync())

我尝试了相同的文件，但是无论如何它都会引发异常。此外，即使我包装了try-catch块，应用程序也会停止运行。