码迷,mamicode.com
首页 > Windows程序 > 详细

跟我学Windows Azure 五 使用Cloub Service连接Blob Service完成图片的上传

时间:2015-01-12 12:41:23      阅读:304      评论:0      收藏:0      [点我收藏+]

标签:

首先,我们创建一个云服务项目,用来演示我们的blob存储

技术分享

下来我们修改我们我们云服务的名字

技术分享

技术分享

 我们需要添加一个空的WebForm的项目

技术分享

点击完成,我们可以看到我们的解决方案已经添加完成

技术分享

下来我们需要添加一个实体类,用来存储文件的信息.

技术分享

技术分享

下面是我们实体类的

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

 

namespace BlobWebRole

{

    public class ImageEn

    {

        public string BlobName { get; set; }

        public Uri FileUri { get; set; }

        public string FileName { get; set; }

        public long Length { get; set; }

        public string FolderName { get; set; }

        public bool IsReadOnly { get; set; }

        public bool IsExists { get; set; }

        public string FullFileName { get; set; }

        public string ExtendName { get; set; }

        public string CreatorName { get; set; }

        public DateTime CreateTime { get; set; }

 

    }

}

下来我们需要添加一个页面窗体,用来进行图片的显示和上传

技术分享

技术分享

下面是Default.aspx前台代码

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="BlobWebRole.Default" %>

 

<!DOCTYPE html>

 

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

    <title></title>

</head>

<body>

  <form id="form1" runat="server">

    <div>

        <div><!--上传图片-->

            <asp:Label ID="lblFilePath" Text="上传文件" AssociatedControlID="fileUploadControl"

                runat="server" />

            <asp:FileUpload ID="fileUploadControl" runat="server" />

            <asp:RequiredFieldValidator ID="filUploadValidator" ControlToValidate="fileUploadControl"

                ValidationGroup="fileInfoGroup" ErrorMessage="请选择文件!" runat="Server">

            </asp:RequiredFieldValidator>

            <br />

            <asp:Label ID="lblFileName" Text="文件名称:" AssociatedControlID="txtFileName" runat="server" />

            <asp:TextBox ID="txtFileName" runat="server" />

            <asp:RequiredFieldValidator ID="fileNameValidator" ControlToValidate="txtFileName"

                ValidationGroup="fileInfoGroup" ErrorMessage="请输入文件名!" runat="Server">

            </asp:RequiredFieldValidator>

            <br />

            <asp:Label ID="lblCreator" Text="创 建 者:" AssociatedControlID="txtCreator" runat="server" />

            <asp:TextBox ID="txtCreator" runat="server" />

            <asp:RequiredFieldValidator ID="submitterValidator" ControlToValidate="txtCreator"

                ValidationGroup="fileInfoGroup" ErrorMessage="请输入创建者!" runat="Server">

            </asp:RequiredFieldValidator>

            <br />

            <asp:Button ID="btnSave" Text="保存" CausesValidation="true" ValidationGroup="fileInfoGroup"

                runat="server" OnClick="btnSave_Click" />

            <br />

            <br />

            <asp:Label ID="statusMessage" runat="server" />

        </div>

        <div><!--列表显示图片-->

            <asp:GridView ID="fileView" AutoGenerateColumns="false" DataKeyNames="BlobName" runat="server"

                OnRowCommand="RowCommandHandler">

                <Columns>

                    <asp:ButtonField Text="Delete" CommandName="DeleteItem" />

                    <asp:HyperLinkField HeaderText="Link" DataTextField="FileName" DataNavigateUrlFields="FileUri" />

                    <asp:BoundField DataField="CreatorName" HeaderText="Created by" />

                    <asp:BoundField DataField="FolderName" HeaderText="FolderName" />

                    <asp:BoundField DataField="IsReadOnly" HeaderText="IsReadOnly" />

                    <asp:BoundField DataField="IsExists" HeaderText="IsExists" />

                    <asp:BoundField DataField="FullFileName" HeaderText="FullFileName" />

                    <asp:BoundField DataField="ExtendName" HeaderText="ExtendName" />

                    <asp:BoundField DataField="CreateTime" HeaderText="CreateTime" />

                </Columns>

            </asp:GridView>

        </div>

    </div>

    </form>

 

</body>

</html>

 

下来添加我们Default.aspx.cs后台代码

 

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using Microsoft.WindowsAzure;

using Microsoft.WindowsAzure.Storage;

using Microsoft.WindowsAzure.Storage.Blob;

using System.IO;

using System.Collections.Specialized;

namespace BlobWebRole

{

    public partial class Default : System.Web.UI.Page

    {

        private CloudBlobClient _BlobClient = null;

        private CloudBlobContainer _BlobContainer = null;

        private const string conContainerAddress = "imagefiles";

        private const string conConfigStorageSetting = "BlobConnectionString";

        protected void Page_Load(object sender, EventArgs e)

        {

          

         

            if (!IsPostBack)

            {

                this.EnsureContainerExists();

               

 

                DisplayFileList();

            }

 

        }

        private void EnsureContainerExists()

        {

            var container = GetContainer();

 

            // 检查container是否被创建,如果没有,创建container

            container.CreateIfNotExists();

 

            var permissions = container.GetPermissions();

            //对Storage的访问权限是可以浏览Container

            permissions.PublicAccess = BlobContainerPublicAccessType.Container;

 

            container.SetPermissions(permissions);

        }

 

        private CloudBlobContainer GetContainer()

        {

            //获取ServiceConfiguration.cscfg配置文件的信息

            var account = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("BlobConnectionString"));

            var client = account.CreateCloudBlobClient();

            //获得BlobContainer对象

            return client.GetContainerReference(conContainerAddress);

        }

 

   

 

        protected void btnSave_Click(object sender, EventArgs e)

        {

            //获取扩展名

            string extension = System.IO.Path.GetExtension(fileUploadControl.FileName);

 

            //获得BlobContainer对象并把文件上传到这个Container

            var blob = this.GetContainer().GetBlockBlobReference(Guid.NewGuid().ToString() + extension);

         

            blob.UploadFromStream(fileUploadControl.FileContent);

 

            ////设置元数据到Blob

 

            blob.Metadata["FileName"] = txtFileName.Text;

            blob.Metadata["Length"] = fileUploadControl.FileContent.Length.ToString();

            DirectoryInfo di = new DirectoryInfo(string.Format("{0}\\", conContainerAddress));

            blob.Metadata["FolderName"] = di.Name;

            FileInfo file = new FileInfo(fileUploadControl.PostedFile.FileName);

            blob.Metadata["IsReadOnly"] = file.IsReadOnly.ToString();

            blob.Metadata["IsExists"] = file.Exists.ToString();

            blob.Metadata["FullFileName"] = file.FullName;

            blob.Metadata["ExtendName"] = file.Extension;//extension

            blob.Metadata["CreatorName"] = txtCreator.Text;

            blob.Metadata["CreateTime"] = DateTime.Now.ToShortTimeString();

 

            blob.SetMetadata();

 

 

 

            //设置属性

            blob.Properties.ContentType = fileUploadControl.PostedFile.ContentType;

            blob.SetProperties();

 

            //显示列表

            DisplayFileList();

 

 

        }

        /// <summary>

        /// 列表

        /// </summary>

        private void DisplayFileList()

        {

            var blobs = this.GetContainer().ListBlobs(null, false, BlobListingDetails.Metadata, null, null).OfType<CloudBlockBlob>();

            var filesList = new List<ImageEn>();

 

            //查询

            foreach (var blobItem in blobs)

            {

            

                //实体字段

                filesList.Add(new ImageEn()

                {

                    FileUri = blobItem.Uri,

                    BlobName=blobItem.Name,

                    FileName = txtFileName.Text,

                    Length = long.Parse(blobItem.Metadata["Length"]),

                    FolderName = blobItem.Metadata["FileName"],

                    IsReadOnly = bool.Parse(blobItem.Metadata["IsReadOnly"]),

                    IsExists = bool.Parse(blobItem.Metadata["IsExists"]),

                    FullFileName = blobItem.Metadata["FullFileName"],

                    ExtendName = blobItem.Metadata["ExtendName"],

                    CreatorName = blobItem.Metadata["CreatorName"],

                    CreateTime = DateTime.Parse(blobItem.Metadata["CreateTime"])

                });

            }

            //绑定列表

            fileView.DataSource = filesList;

            fileView.DataBind();

        }

        protected void RowCommandHandler(object sender, GridViewCommandEventArgs e)

        {

            //删除

            if (e.CommandName == "DeleteItem")

            {

                // 获取索引

                var index = Convert.ToInt32(e.CommandArgument);

                var blobName = fileView.DataKeys[index].Value.ToString();

           

 

                //Get the container

                var blob = this.GetContainer().GetBlockBlobReference(blobName);

                blob.Delete();

 

            }

            //更新列表

            DisplayFileList();

        }

 

    }

}

我们登陆WindowsAzure管理门户去添加一个存储.

技术分享

我们添加名为teacherblob的存储服务

技术分享

下来我们双击我们Studio2013中的云服务,点击设置,去设置他所要连接的设置

技术分享

我们把连接字符串的名称叫做BlobConnectionstring,然后选择类型为连接字符串,然后值那里我们选择我的订约,然后会自动带出,我们刚才在Windows azure上建立的blob,选择他就可以了.

技术分享

技术分享

然后我们选择我们的BlobStorageDemo进行调试

技术分享

我们在页面中输入需要上传得图片及对应的属性.点击保存按钮,保存按钮成功后,列表中会显示我们的图片文件信息.

技术分享

下来我们可以在我们studio中看到我们存储的文件

技术分享

我们同时也可以使用azure storage explorer看到我们我们上传得文件

技术分享

打完收工!

 

跟我学Windows Azure 五 使用Cloub Service连接Blob Service完成图片的上传

标签:

原文地址:http://www.cnblogs.com/txsoft/p/4218009.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!