net azure.storage.blobs 公共方法

public class AzureBlobHelper
    {
        /// <summary>
        /// 初始化链接字符串
        /// </summary>
        private static string ConnectionString = "azureBlob链接字符串";

        /// <summary>
        /// 获取blob容器公共方法
        /// </summary>
        /// <typeparam name="T">返回类型（泛型）</typeparam>
        /// <param name="func">执行的委托</param>
        /// <param name="blobContainerName">容器名称</param>
        /// <returns></returns>
        private static T Do<T>(Func<BlobContainerClient, T> func, string blobContainerName)
        {
            try
            {
                var container = new BlobContainerClient(ConnectionString, blobContainerName);

                //// 容器不存在创建容器
                if (!container.Exists())
                {
                    container.Create();
                }
                return func(container);
            }
            catch (Exception ex)
            {
                WriteSqlErrorLog(ex);
                throw ex;
            }
        }

        #region 附件是否存在

        /// <summary>
        /// 附件是否存在
        /// </summary>
        /// <param name="blobname">blob名称（文件名称带后缀）</param>
        /// <param name="blobContainerName">容器名称</param>
        /// <returns></returns>
        public static bool FileIsExist(string blobname, string blobContainerName)
        {
            var res = Do(container =>
            {
                BlobClient blobClient = container.GetBlobClient(blobname);
                return blobClient.Exists();
            }, blobContainerName);
            return res;
        }

        #endregion

        #region 附件上传

        /// <summary>
        /// 附件上传
        /// </summary>     
        /// <param name="blobname">blob名称（文件名称带后缀）</param>
        /// <param name="content">上传的文件流</param>
        /// <param name="blobContainerName">容器名称</param>
        /// <returns></returns>
        public static bool UpLoadFile(string blobname, Stream content, string blobContainerName)
        {
            var res = Do(container =>
            {
                BlobClient blobClient = container.GetBlobClient(blobname);

                var blobHeadersObj = new BlobHttpHeaders() { ContentType = blobname.GetContentType() };
                var Status = blobClient.Upload(content, blobHeadersObj);
                //上传成功状态为201
                if (Status.GetRawResponse().Status == 201)
                {
                    return true;
                }
                else
                {
                    return false;
                }

            }, blobContainerName);

            return res;
        }

        #endregion

        #region 附件下载

        /// <summary>
        /// 附件下载
        /// </summary>
        /// <param name="blobname">blob名称（文件名称带后缀）</param>
        /// <param name="blobContainerName">容器名称</param>
        /// <returns></returns>
        public static MemoryStream DownloadFile(string blobname, string blobContainerName)
        {
            var res = Do(container =>
            {
                MemoryStream memStream = new MemoryStream();
                BlobClient blobClient = container.GetBlobClient(blobname);
                blobClient.DownloadTo(memStream);
                return memStream;
            }, blobContainerName);

            return res;
        }

        #endregion

        #region 附件删除

        /// <summary>
        /// 附件删除
        /// </summary>
        /// <param name="blobName">blob名称（文件名称带后缀）</param>
        /// <param name="blobContainerName">容器名称</param>
        /// <returns></returns>
        public bool DeleteBlobAsync(string blobName, string blobContainerName)
        {
            var res = Do(container =>
            {
                return container.DeleteIfExists();
            }, blobContainerName);

            return res;
        }
        #endregion


        #region 获取所有Blob名称

        /// <summary>
        /// 获取所有Blob名称
        /// </summary>
        /// <param name="blobContainerName">容器名称</param>
        /// <returns></returns>
        public IEnumerable<string> GetBlobsNameList(string blobContainerName)
        {
            var res = Do(container =>
            {
                var items = new List<string>();
                foreach (var blobItem in container.GetBlobs())
                {
                    items.Add(blobItem.Name);
                }
                return items;

            }, blobContainerName);

            return res;
        }
        #endregion


        #region 操作报错处理

        /// <summary>
        /// 操作报错处理
        /// </summary>
        /// <param name="parameter"></param>
        /// <param name="ex"></param>
        public static void WriteSqlErrorLog(Exception ex)
        {
            sys_sqlerrorlogHandler handler = new sys_sqlerrorlogHandler(null, "AzureBlob", null, ex);
            handler.WriteLog();
        }

        #endregion

    }

根据文件名称（全称带后缀.txt等）获取文件类型

public static class FileExtensions
    {
        private static readonly FileExtensionContentTypeProvider provider = new FileExtensionContentTypeProvider();

        /// <summary>
        /// 获取文件类型
        /// </summary>
        /// <param name="fileName">文件名称（文件名全称：带后缀名）</param>
        /// <returns></returns>
        public static string GetContentType(this string fileName)
        {
            if (!provider.TryGetContentType(fileName, out var contentType))
            {
                contentType = "application/octet-stream";
            }
            return contentType;
        }
    }