我在每个循环中使用IEnumerable
,如下所示:
foreach (IListBlobItem blobItem in container.ListBlobs())
{
if (blobItem is CloudBlobDirectory)
{
CloudBlobDirectory directory = (CloudBlobDirectory)blobItem;
IEnumerable<IListBlobItem> blobs = directory.ListBlobs(true);
}
}
await ProcessBlobs(blobs);
我想在此foreach循环之外使用
blobs
变量,但得到以下消息:blobs doesnot exist in the current context
我决定在foreach循环之外定义
blobs
:IEnumerable<IListBlobItem> blobs = new IEnumerable<IListBlobItem>;
foreach (IListBlobItem blobItem in container.ListBlobs())
{
if (blobItem is CloudBlobDirectory)
{
//Console.WriteLine(blobItem.Uri);
CloudBlobDirectory directory = (CloudBlobDirectory)blobItem;
IEnumerable<IListBlobItem> blobs = directory.ListBlobs(true);
}
}
但出现错误:
can not create an instance of the abstract class or interface IEnumerable<IListBlobItem>
您知道如何解决此问题吗?
最佳答案
您可以将blobs
声明为一个空集合,例如数组: