Check Container Exists In Azure Blob Storage in C#.Net

In this article i am going to explain about How to Check Container Exists In Azure Blob Storage in C#.Net .There is no predefined method exists in the .Net Library to check whether the specific container exists or not in the blob storage. But we can check the container existence using Get Blob Properties, which does a HEAD request against the blob and returns 404 error if the container doesn’t exists.

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Create a console application and include the System.Configuration,Microsoft.WindowsAzure and Microsoft.WindowsAzure.StorageClient dlls to your project. And then include the below dlls in your project.

C#.Net:

usingMicrosoft.WindowsAzure;
usingMicrosoft.WindowsAzure.StorageClient;
using System;
usingSystem.Configuration;

Add the below details in the configuration file.

<connectionStrings>
  <add name=StorageAccount connectionString=DefaultEndpointsProtocol=https;AccountName=youraccoutname;AccountKey=youraccountkey />
</connectionStrings>
<appSettings>
  <add key=containername value=samplecontainer/>
</appSettings>

Now the below code is used to check the existence of the container in blobstorage.

C#.Net:

class Program
{
    static void Main(string[] args)
    {
        //Reading connection string from app.config.
        stringstorageConnectionString = ConfigurationManager.ConnectionStrings[“StorageAccount”].ConnectionString;
        //Reading container name from app.config.
        string containerName =
            ConfigurationManager.AppSettings.Get(“containername”).ToString();
        //Connecting Cloud storage account
        CloudStorageAccount Account =
            CloudStorageAccount.Parse(storageConnectionString);
        //Creating BlobClient using the above credentials
        CloudBlobClientBlobClient = Account.CreateCloudBlobClient();
        Console.WriteLine(“Checking container existence..”);
        CloudBlobContainercontainer =
            BlobClient.GetContainerReference(containerName);
        try
        {
            //Fetches attributes of container
            container.FetchAttributes();
            Console.WriteLine(“Container exists..”);
        }
        catch (StorageClientException e)
        {
            //throws error if the specified container not exists
            if (e.ErrorCode == StorageErrorCode.ResourceNotFound)
            {
                Console.WriteLine(“Container not exists..”);
            }
            else
            {
                // other exceptions
                Console.WriteLine(“Errr..: “ + e.Message);
            }
        }
        finally
        {
            Console.ReadLine();
        }
    }
}

The console output is shown below.

Output of Check Container Exists In Azure Blob Storage in C#.Net

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