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Introduction

This is an example of leveraging the Microsoft.Azure.Cosmos.Table NuGet package in a repository pattern.

Prerequisites

The following prerequisites are required:

Projects

ClassLibrary1.csproj

This project contains the standard interfaces and abstract classed to support how Azure Table Storage should be implemente for reading and writing.

The Entity classes are for root entities, e.g. ToDo, while the ChildEntity classes are for children of root entities, e.g. ToDoComment.

From a code perspective, the main difference between Entity and ChildEntity is that ChildEntity is open to having a ParentId property which is required for most calls using the ChildEntityDataStore.

ClassLibrary1.Tests.csproj

Contains the tests for the ClassLibrary1 project.

The tests cover valid configuration options.

FunctionApp1.csproj

This project contains the concrete implementations of the ToDo and ToDoComment entities and data stores - the repositories in a repository design pattern - that are persisted to Azure Table Storage.

It also contains Azure Functions, and supporting classes, for CRUD operations: create, retrieve, update and delete.

FunctionApp1.Tests.csproj

Contains the tests for the FunctionApp1 project.

The tests cover reading and writing data use the EntityDataStore classes.

Currently the tests are setup to run locally using the Azure Storage Emulator.

{
  "Logging": {
    "LogLevel": {
      "Default": "Debug",
      "System": "Information",
      "Microsoft": "Information"
    }
  },
  "AzureTableStorageOptions:ConnectionString": "UseDevelopmentStorage=true"
}

To use storage in Azure, update the AzureTableStorageOptions:ConnectionString property with your Primary or Secondary connection strings.

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