Checking if a blob exists in Azure Storage

Question

I just want to know whether a blob exists in a particular container or not. Simple question right!

I'll download it if yes else I'll do something else . I've done a lot of research but it seems that it doesn't exist.

Answer 1

• Good news for you. It does exist in the new API. You can use exists () function call.  
• Just remember to use GetBlockBlobReference which doesn't perform the call to the server.
• You can use the given syntax:

public static bool BlobExists(CloudBlobClient client, 

    string containerNaHow to get the azure account tenant Id?

me, string key)

{

     return client.GetContainerReference(containerName)

                  .GetBlockBlobReference(key)

                  .Exists();

You can learn more about various types of Azure storage on Azure Storage Tutorial.

Answer 2

The new API has the .Exists() function call. Just make sure that you use the GetBlockBlobReference, which doesn't perform the call to the server.

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It makes the function as easy as:

public static bool BlobExistsOnCloud(CloudBlobClient client, 

    string containerName, string key)

{

     return client.GetContainerReference(containerName)

                  .GetBlockBlobReference(key)

                  .Exists();  

}

Answer 3

The new API has the .Exists() function call. Ensure that you are using the GetBlockBlobReference,as it doesn’t make server calls . It simplifies the function into:

public static bool BlobExistsOnCloud(CloudBlobClient client, 

string containerName, string key) 

{

 return client.GetContainerReference(containerName)

 .GetBlockBlobReference(key) 

.Exists(); 

}