Complete BLOB Storing: Creating a Custom Provider.

docs/en/Blob-Storing-Custom-Provider.md

@@ -1,3 +1,88 @@
 # BLOB Storing: Creating a Custom Provider
 
-TODO
+This document explains how you can create a new storage provider for the BLOB storing system with an example.
+
+> Read the [BLOB Storing document](Blob-Storing.md) to understand how to use the BLOB storing system. This document only covers how to create a new storage provider.
+
+## Example Implementation
+
+The first step is to create a class implements the `IBlobProvider` interface or inherit from the `BlobProviderBase` abstract class.
+
+````csharp
+using System.IO;
+using System.Threading.Tasks;
+using Volo.Abp.BlobStoring;
+using Volo.Abp.DependencyInjection;
+
+namespace AbpDemo
+{
+    public class MyCustomBlobProvider : BlobProviderBase, ITransientDependency
+    {
+        public override Task SaveAsync(BlobProviderSaveArgs args)
+        {
+            //TODO...
+        }
+
+        public override Task<bool> DeleteAsync(BlobProviderDeleteArgs args)
+        {
+            //TODO...
+        }
+
+        public override Task<bool> ExistsAsync(BlobProviderExistsArgs args)
+        {
+            //TODO...
+        }
+
+        public override Task<Stream> GetOrNullAsync(BlobProviderGetArgs args)
+        {
+            //TODO...
+        }
+    }
+}
+````
+
+* `MyCustomBlobProvider` inherits from the `BlobProviderBase` and overrides the `abstract` methods. The actual implementation is up to you.
+* Implementing `ITransientDependency` registers this class to the [Dependency Injection](Dependency-Injection.md) system as a transient service.
+
+That's all. Now, you can configure containers (inside the `ConfigureServices` method of your [module](Module-Development-Basics.md)) to use the `MyCustomBlobProvider` class:
+
+````csharp
+Configure<AbpBlobStoringOptions>(options =>
+{
+    options.Containers.ConfigureDefault(container =>
+    {
+        container.ProviderType = typeof(MyCustomBlobProvider);
+    });
+});
+````
+
+> See the [BLOB Storing document](Blob-Storing.md) if you want to configure a specific container.
+
+### BlobContainerConfiguration Extension Method
+
+If you want to provide a simpler configuration, create an extension method for the `BlobContainerConfiguration` class:
+
+````
+public static class MyBlobContainerConfigurationExtensions
+{
+    public static BlobContainerConfiguration UseMyCustomBlobProvider(
+        this BlobContainerConfiguration containerConfiguration)
+    {
+        containerConfiguration.ProviderType = typeof(MyCustomBlobProvider);
+        return containerConfiguration;
+    }
+}
+````
+
+Then you can configure containers easier using the extension method:
+
+````csharp
+Configure<AbpBlobStoringOptions>(options =>
+{
+    options.Containers.ConfigureDefault(container =>
+    {
+        container.UseMyCustomBlobProvider();
+    });
+});
+````
+

docs/en/Blob-Storing-File-System.md

@@ -2,7 +2,7 @@
 
 File System Storage Provider is used to store BLOBs in the local file system as standard files inside a folder.
 
-> Read the BLOB Storing document to understand how to use the BLOB storing system. This document only covers how to configure containers to use the file system.
+> Read the [BLOB Storing document](Blob-Storing.md) to understand how to use the BLOB storing system. This document only covers how to configure containers to use the file system.
 
 ## Installation
 

docs/en/Blob-Storing.md

@@ -20,9 +20,9 @@ ABP Framework has the following storage provider implementations;
 * [Database](Blob-Storing-Database.md): Stores BLOBs in a database.
 * [Azure](Blob-Storing-Azure.md): Stores BLOBs on the [Azure BLOB storage](https://azure.microsoft.com/en-us/services/storage/blobs/).
 
-More providers will be implemented by the time. You can [request](https://github.com/abpframework/abp/issues/new) it for your favorite provider or [create it yourself](Blob-Storing-Custom-Provider.md).
+More providers will be implemented by the time. You can [request](https://github.com/abpframework/abp/issues/new) it for your favorite provider or [create it yourself](Blob-Storing-Custom-Provider.md) and [contribute](Contribution/Index.md) to the ABP Framework.
 
-Multiple providers **can be used together** by the help of the **container system**, where each container can use a different provider (will be explained below).
+Multiple providers **can be used together** by the help of the **container system**, where each container can uses a different provider.
 
 > BLOB storing system can not work unless you **configure a storage provider**. Refer to the linked documents for the storage provider configurations.