Question

在我的页面中，我需要按名称，类型和LastModified

搜索容器和blob

 var selectedValue = ddlFileType.SelectedValue;
        AzureSettings container = AzureSettingsServices.Select(selectedValue.ParseInt(-1));
        if (ViewState[container.Name] == null)
        {
            IEnumerable<IListBlobItem> blobList = BlobHelper.GetFileListByContainer(container.Name);

            //I add the viewstate for not spending money in azure :)
            ViewState.Add(container.Name, blobList);

        }
         List<CloudBlob> list = null;
        string fileName = txtFileName.Text;
        if (!string.IsNullOrWhiteSpace(fileName))
        {
            //by name and date
            list = ((IEnumerable<IListBlobItem>)ViewState[container.Name]).OfType<CloudBlob>().Where(x => x.Name == fileName && x.Properties.LastModified >= dtDate.ValueRange.StartDate && x.Properties.LastModified <= dtDate.ValueRange.EndDate ).ToList();
        }
        else if (string.IsNullOrWhiteSpace(fileName))
        {
            //by date
            list = ((IEnumerable<IListBlobItem>)ViewState[container.Name]).OfType<CloudBlob>().Where(x => x.Properties.LastModified >= dtDate.ValueRange.StartDate && x.Properties.LastModified <= dtDate.ValueRange.EndDate ).ToList();
        }
        if (list != null)
        {
          // by type
            list=list.OfType<CloudBlob>().Where(x => x.Name.Contains(selectedValue)).ToList();

            SelectedContainer = container.Name;
            grdFiles.DataSource = list;
            grdFiles.DataBind();
        }

问题是我不能给List＆lt; CloudBlob＆gt;列为gridview数据源是正常的，但我如何设置为List＆lt; CloudBlob＆gt;列入（ IEnumerable＆lt; IListBlobItem＆gt; bloblist或我的视图状态（注意：在我的视图状态中是我的Ilistblobitem列表））返回我的gridview数据源

更新错误2 ：

grdFiles.DataSource =（（IEnumerable）ViewState [container.Name]）;

grdFiles.DataBind（）;

以下是关于

的错误

'Microsoft.WindowsAzure.Storage，Version = 7.2.1.0，Culture = neutral，PublicKeyToken = 31bf3856ad364e35''Microsoft.WindowsAzure.Storage.Core.Util.CommonUtility + d__0`1 [[Microsoft.WindowsAzure.Storage.Blob。 IListBlobItem，Microsoft.WindowsAzure.Storage，Version = 7.2.1.0，Culture = neutral，PublicKeyToken = 31bf3856ad364e35]]'

> [SerializationException: 'Microsoft.WindowsAzure.Storage, Version=7.2.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' Derlemesindeki 'Microsoft.WindowsAzure.Storage.Core.Util.CommonUtility+<LazyEnumerable>d__0`1[[Microsoft.WindowsAzure.Storage.Blob.IListBlobItem, Microsoft.WindowsAzure.Storage, Version=7.2.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]' ]

System.Runtime.Serialization.FormatterServices.InternalGetSerializableMembers（RuntimeType type）+12207601      System.Runtime.Serialization.FormatterServices.GetSerializableMembers（Type type，StreamingContext context）+230      System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitMemberInfo（）+ 143

System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize（Object obj，ISurrogateSelector surrogateSelector，StreamingContext context，SerObjectInfoInit serObjectInfoInit，IFormatterConverter converter，ObjectWriter objectWriter，SerializationBinder binder）+178      System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.Serialize（Object obj，ISurrogateSelector surrogateSelector，StreamingContext context，SerObjectInfoInit serObjectInfoInit，IFormatterConverter converter，ObjectWriter objectWriter，SerializationBinder binder）+51      System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Serialize（Object graph，Header [] inHeaders，__BinaryWriter serWriter，Boolean fCheck）+540   System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize（Stream serializationStream，Object graph，Header [] headers，Boolean fCheck）+131   System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize（Stream serializationStream，Object graph）+17      System.Web.UI.ObjectStateFormatter.SerializeValue（SerializerBinaryWriter writer，Object value）+3046

[ArgumentException：'Microsoft.WindowsAzure.Storage.Core.Util.CommonUtility + d__0 1[[Microsoft.WindowsAzure.Storage.Blob.IListBlobItem, Microsoft.WindowsAzure.Storage, Version=7.2.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]' türündeki 'Microsoft.WindowsAzure.Storage.Core.Util.CommonUtility+<LazyEnumerable>d__0 1 [Microsoft.WindowsAzure.Storage.Blob.IListBlobItem]'değerinisersehalegetirmehatası。]      System.Web.UI.ObjectStateFormatter.SerializeValue（SerializerBinaryWriter writer，Object value）+3770      System.Web.UI.ObjectStateFormatter.Serialize（Stream outputStream，Object stateGraph）+144      System.Web.UI.ObjectStateFormatter.Serialize（Object stateGraph，Purpose purpose）+71      System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Serialize（Object state）+39      System.Web.UI.Util.SerializeWithAssert（IStateFormatter formatter，Object stateGraph）+37      System.Web.UI.Control.EstimateStateSize（Object state）+45      System.Web.UI.Control.BuildProfileTree（String parentId，Boolean calcViewState）+71      System.Web.UI.Page.BuildPageProfileTree（Boolean enableViewState）+42      System.Web.UI.Page.ProcessRequestMain（Boolean includeStagesBeforeAsyncPoint，Boolean includeStagesAfterAsyncPoint）+5761

Answer 1

正如您所说，IEnumerable无法添加到viewstate，也无法成为gridview的数据源。

据我所知，IListBlobItem是一个接口.IEnumerable包含三种类型的blob项。

CloudBlockBlob,CloudPageBlob,CloudBlobDirectory

所以我建议您首先检查类型并转换为datatable或其他内容，然后将其添加到ViewState中。

如下所示：

  DataTable d1 = new DataTable();
            d1.Columns.Add("Type");
            d1.Columns.Add("Id");
            d1.Columns.Add("Url");
            foreach (var item in blobs)
            {
                if (item.GetType() == typeof(CloudBlockBlob))
                {
                    CloudBlockBlob blob = (CloudBlockBlob)item;

                    d1.Rows.Add("CloudBlockBlob", blob.Name, blob.Uri);
                }
                else if (item.GetType() == typeof(CloudPageBlob))
                {
                    CloudPageBlob blob = (CloudPageBlob)item;
                    d1.Rows.Add("CloudPageBlob", blob.Name, blob.Uri);
                }
                else if (item.GetType() == typeof(CloudBlobDirectory))
                {
                    CloudBlobDirectory blob = (CloudBlobDirectory)item;
                    d1.Rows.Add("directory", blob.StorageUri, blob.Uri);
                }

            }
            ViewState.Add(container.Name, d1);

结果：

会更好地查看状态，或者我在非后备和回发中再次查看列表？

据我所知，你需要为azure中的列表blob付费（每10,000美元LRS冷却0.10美元）。因此，如果您不需要更新blob列表，我建议您可以使用viewstate存储listblob操作的结果。

如何在我的asp.net中处理sas到期时它将超过1000个用户..当我删除blobContainer.GetPermissions（）;并创建一个新的并设置它。另一个上传的用户将因为我为另一个用户创建新的sas而失败。

据我所知，如果删除blobContainer的权限，它将删除SAS访问策略。

然后，根据此SAS访问策略创建的所有SAS令牌都将无用。

通常，我们可以创建一个没有到期日期的访问策略。

然后，当您为特定用户创建签名网址时，您可以根据此访问权限策略指定到期日期。

代码如下：

  SharedAccessPolicy sharedAccessPolicy = new SharedAccessPolicy();
    sharedAccessPolicy.Permissions = SharedAccessPermissions.Read;
    sharedAccessPolicy.SharedAccessStartTime = DateTime.UtcNow;
    //sharedAccessPolicy.SharedAccessExpiryTime = DateTime.UtcNow.AddMinutes(1); No need to define expiry time here.

    BlobContainerPermissions blobContainerPermissions = new BlobContainerPermissions();
    blobContainerPermissions.SharedAccessPolicies.Add("default", sharedAccessPolicy);

    container.SetPermissions(blobContainerPermissions);

    Console.WriteLine("Press any key to continue....");
    Console.ReadLine();
    CloudBlob blob = container.GetBlobReference(path);

    string sas = blob.GetSharedAccessSignature(new SharedAccessPolicy()
    {
        SharedAccessExpiryTime = DateTime.UtcNow.AddDays(7),//add expiry date only when you're creating the signed URL
    }
        , "default");

    Console.WriteLine(blob.Uri.AbsoluteUri + sas);

    Process.Start(new ProcessStartInfo(blob.Uri.AbsoluteUri + sas));

    Console.WriteLine("Press any key to continue....");
    Console.ReadLine();

此外，我们可以创建5个访问策略，因此我建议您可以为不同的用户创建不同的访问策略并创建不同的SAS令牌。

Azure IListBlobItem Oftype CloudBlob Linq更改列表<cloudblob>

1 个答案: