Azure连接字符串-对象引用未设置为对象的实例

Question

我试图在Windows控制台应用程序中下载azure Blob。当我构建和调试应用程序时，我的azure连接字符串引发了一个异常。这个字符串在我的其他ASP.NET应用程序中工作得很好。

CloudStorageAccount storageAccount = CloudStorageAccount.Parse(ConfigurationManager.ConnectionStrings["DefaultEndpointsProtocol=https;AccountName=xxxxx;AccountKey=xxxxx==;BlobEndpoint=https://xxxxx.blob.core.windows.net/;TableEndpoint=https://xxxxx.table.core.windows.net/;QueueEndpoint=https://xxxxx.queue.core.windows.net/;FileEndpoint=https://xxxxx.file.core.windows.net/"].ConnectionString);

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections;
using Microsoft.WindowsAzure;
using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.Auth;
using Microsoft.WindowsAzure.Storage.Blob;
using System.Configuration;
using System.IO;
using System.Data;
using System.Data.SqlClient;
using System.Threading;

namespace CPGetAdverts
{
    class Program
    {
        static void Main(string[] args)
        {
            // Retrieve storage account from connection string.
            CloudStorageAccount storageAccount = CloudStorageAccount.Parse(ConfigurationManager.ConnectionStrings["DefaultEndpointsProtocol=https;AccountName=xxxxx;AccountKey=xxxxx==;BlobEndpoint=https://xxxxx.blob.core.windows.net/;TableEndpoint=https://xxxxx.table.core.windows.net/;QueueEndpoint=https://xxxxx.queue.core.windows.net/;FileEndpoint=https://xxxxx.file.core.windows.net/"].ConnectionString);
            // Create the blob client.
            CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
            // Retrieve a reference to a container.
            var container = blobClient.GetContainerReference("newadverts").ListBlobs();
            // Retrieve filenames from container List
            var urls = new List<string>();
            int fileName = 1;

            foreach (var blob in container)
            {
                using (var fileStream = System.IO.File.OpenWrite(@"\home\pi\Pictures\" + fileName + ".jpg"))
                {
                    var blobReference = blobClient.GetBlobReferenceFromServer(blob.Uri);
                    blobReference.DownloadToStream(fileStream);
                    fileName++;
                }
            }

        }
    }
}

Answer 1

我希望ConfigurationManager.ConnectionStrings[“”]引用连接字符串的名称，而不是连接字符串本身。如果对连接字符串进行硬编码，则不需要调用检索连接字符串。

详情见此问题。