Windows Azure Storage (25) Azure Append Blob

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Microsoft.WindowsAzure.Storage;
using System.Configuration;
using Microsoft.WindowsAzure.Storage.Blob;
using System.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(ConfigurationManager.AppSettings["AzureStorageConnectionString"]);
            CloudBlobClient cloudBlobClient = cloudStorageAccount.CreateCloudBlobClient();
            
            //Container Name必须为小写
            CloudBlobContainer cloudBlobContainer = cloudBlobClient.GetContainerReference("appendblobcontainer");
            cloudBlobContainer.CreateIfNotExists();

            CloudAppendBlob cloudAppendBlob = cloudBlobContainer.GetAppendBlobReference("helloworld.txt");

            //如果不存在，则创建该文件
            if(!cloudAppendBlob.Exists())
            { 
                cloudAppendBlob.CreateOrReplace();
            }

            var tasks = new Task[100];
            for (int i = 0; i < 100; i++)
            {
                var message = string.Format("Appending log number {0} to an append blob.\r\n", i);

                var bytes = Encoding.UTF8.GetBytes(message);

                var stream = new MemoryStream(bytes);

                tasks[i] = cloudAppendBlob.AppendBlockAsync(stream);
            }

            Task.WaitAll(tasks);

            string appendBlobContent = cloudAppendBlob.DownloadText();
        }
    }
}