PanoramicData.OData.Client 10.0.64

PanoramicData.OData.Client

A lightweight, modern OData V4 client library for .NET 10.

What's New

See the CHANGELOG for a complete list of changes in each version.

OData V4 Feature Support

Installation

dotnet add package PanoramicData.OData.Client

Quick Start

using PanoramicData.OData.Client;

// Create the client
var client = new ODataClient(new ODataClientOptions
{
    BaseUrl = "https://services.odata.org/V4/OData/OData.svc/",
    ConfigureRequest = request =>
    {
        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "your-token");
    }
});

// Query entities
var query = client.For<Product>("Products")
    .Filter("Price gt 100")
    .OrderBy("Name")
    .Top(10);

var response = await client.GetAsync(query);

// Get all pages automatically
var allProducts = await client.GetAllAsync(query, cancellationToken);

// Get by key
var product = await client.GetByKeyAsync<Product, int>(123);

// Create
var newProduct = await client.CreateAsync("Products", new Product { Name = "Widget" });

// Update (PATCH)
var updated = await client.UpdateAsync<Product>("Products", 123, new { Price = 150.00 });

// Delete
await client.DeleteAsync("Products", 123);

Entity Model Example

using System.Text.Json.Serialization;

public class Product
{
    [JsonPropertyName("ID")]
    public int Id { get; set; }
    
    public string Name { get; set; } = string.Empty;
    
    public string? Description { get; set; }
    
    public DateTimeOffset? ReleaseDate { get; set; }
    
    public int? Rating { get; set; }
    
    public decimal? Price { get; set; }
}

Query Builder Features

// Filtering with OData expressions
var query = client.For<Product>("Products")
    .Filter("Rating gt 3")
    .Top(3);

// Select specific fields
var query = client.For<Product>("Products")
    .Select("ID,Name,Price")
    .Top(3);

// Expand navigation properties
var query = client.For<Product>("Products")
    .Expand("Category,Supplier");

// Ordering
var query = client.For<Product>("Products")
    .OrderBy("Price desc")
    .Top(5);

// Paging
var query = client.For<Product>("Products")
    .Skip(20)
    .Top(10)
    .Count();

// Search
var query = client.For<Product>("Products")
    .Search("widget");

// Custom headers per query
var query = client.For<Product>("Products")
    .WithHeader("Prefer", "return=representation");

// Combine multiple options
var query = client.For<Product>("Products")
    .Filter("Rating gt 3")
    .Select("ID,Name,Price")
    .OrderBy("Price desc")
    .Top(10);

Fluent Query Execution

Execute queries directly from the query builder without needing to pass the query to a separate method:

// Get all matching entities
var products = await client.For<Product>("Products")
    .Filter("Price gt 100")
    .OrderBy("Name")
    .GetAsync(cancellationToken);

// Get all pages automatically
var allProducts = await client.For<Product>("Products")
    .Filter("Rating gt 3")
    .GetAllAsync(cancellationToken);

// Get first or default
var cheapest = await client.For<Product>("Products")
    .OrderBy("Price")
    .GetFirstOrDefaultAsync(cancellationToken);

// Get single entity (throws if not exactly one)
var unique = await client.For<Product>("Products")
    .Filter("Name eq 'SpecialWidget'")
    .GetSingleAsync(cancellationToken);

// Get single or default (returns null if none, throws if multiple)
var maybeOne = await client.For<Product>("Products")
    .Filter("ID eq 123")
    .GetSingleOrDefaultAsync(cancellationToken);

// Get count
var count = await client.For<Product>("Products")
    .Filter("Price gt 50")
    .GetCountAsync(cancellationToken);

Raw OData Queries

// Use raw filter strings for complex scenarios
var query = client.For<Product>("Products")
    .Filter("contains(tolower(Name), 'widget')");

// Get raw JSON response
var json = await client.GetRawAsync("Products?$filter=Price gt 100");

OData Functions and Actions

// Call a function
var query = client.For<Product>("Products")
    .Function("Microsoft.Dynamics.CRM.SearchProducts", new { SearchTerm = "widget" });
var result = await client.CallFunctionAsync<Product, List<Product>>(query);

// Call an action
var response = await client.CallActionAsync<OrderResult>(
    "Orders(123)/Microsoft.Dynamics.CRM.Ship",
    new { TrackingNumber = "ABC123" });

Logging with Dependency Injection

The client supports ILogger for detailed request/response logging:

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using PanoramicData.OData.Client;

// Set up dependency injection with logging
var services = new ServiceCollection();

services.AddLogging(builder =>
{
    builder
        .SetMinimumLevel(LogLevel.Debug)
        .AddSimpleConsole(options =>
        {
            options.IncludeScopes = true;
            options.SingleLine = false;
            options.TimestampFormat = "HH:mm:ss.fff ";
        });
});

var serviceProvider = services.BuildServiceProvider();
var loggerFactory = serviceProvider.GetRequiredService<ILoggerFactory>();

// Create the ODataClient with logging enabled
var logger = loggerFactory.CreateLogger<ODataClient>();
var client = new ODataClient(new ODataClientOptions
{
    BaseUrl = "https://services.odata.org/V4/OData.svc/",
    Logger = logger,
    RetryCount = 3,
    RetryDelay = TimeSpan.FromMilliseconds(500)
});

// Now all requests will be logged with full details
var query = client.For<Product>("Products").Top(5);
var response = await client.GetAsync(query);

Logging Levels

Full HTTP Traffic Logging (Trace Level)

To see complete request and response details including headers and body content, set the minimum log level to Trace:

services.AddLogging(builder =>
{
    builder
        .SetMinimumLevel(LogLevel.Trace)  // Enable full HTTP traffic logging
        .AddSimpleConsole();
});

Sample Trace output:

=== HTTP Request ===
GET https://api.example.com/Products?$top=5
--- Request Headers ---
Authorization: Bearer eyJ...
Accept: application/json
--- Request Body ---
(none for GET requests)

=== HTTP Response ===
Status: 200 OK
--- Response Headers ---
Content-Type: application/json; odata.metadata=minimal
OData-Version: 4.0
--- Response Body ---
{"@odata.context":"...","value":[{"ID":1,"Name":"Widget",...}]}

Sample Debug Log Output

12:34:56.789 dbug: PanoramicData.OData.Client.ODataClient[0]
      GetAsync<Product> - URL: Products?$top=5
12:34:56.890 dbug: PanoramicData.OData.Client.ODataClient[0]
      CreateRequest - GET Products?$top=5
12:34:57.123 dbug: PanoramicData.OData.Client.ODataClient[0]
      SendWithRetryAsync - Received OK from Products?$top=5
12:34:57.145 dbug: PanoramicData.OData.Client.ODataClient[0]
      GetAsync<Product> - Response received, content length: 1234
12:34:57.156 dbug: PanoramicData.OData.Client.ODataClient[0]
      GetAsync<Product> - Parsed 5 items from 'value' array

Configuration Options

var client = new ODataClient(new ODataClientOptions
{
    // Required: Base URL of the OData service
    BaseUrl = "https://api.example.com/odata",
    
    // Optional: Request timeout (default: 5 minutes)
    Timeout = TimeSpan.FromMinutes(5),
    
    // Optional: Retry configuration for transient failures
    RetryCount = 3,
    RetryDelay = TimeSpan.FromSeconds(1),
    
    // Optional: Provide your own HttpClient
    HttpClient = existingHttpClient,
    
    // Optional: ILogger for debug logging
    Logger = loggerInstance,
    
    // Optional: Custom JSON serialization settings
    JsonSerializerOptions = customOptions,
    
    // Optional: Configure headers for every request
    ConfigureRequest = request =>
    {
        request.Headers.Add("Custom-Header", "value");
        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "token");
    }
});

Exception Handling

try
{
    var product = await client.GetByKeyAsync<Product, int>(999);
}
catch (ODataNotFoundException ex)
{
    // 404 - Entity not found
    Console.WriteLine($"Not found: {ex.RequestUrl}");
}
catch (ODataUnauthorizedException ex)
{
    // 401 - Unauthorized
    Console.WriteLine($"Unauthorized: {ex.ResponseBody}");
}
catch (ODataForbiddenException ex)
{
    // 403 - Forbidden
    Console.WriteLine($"Forbidden: {ex.ResponseBody}");
}
catch (ODataConcurrencyException ex)
{
    // 412 - ETag mismatch
    Console.WriteLine($"Concurrency conflict: {ex.RequestETag} vs {ex.CurrentETag}");
}
catch (ODataClientException ex)
{
    // Other errors
    Console.WriteLine($"Status: {ex.StatusCode}, Body: {ex.ResponseBody}");
}

Testing

The library can be tested against the public OData sample services:

// Read-only sample service
const string ODataV4ReadOnlyUri = "https://services.odata.org/V4/OData/OData.svc/";

// Read-write sample service (creates unique session)
const string ODataV4ReadWriteUri = "https://services.odata.org/V4/OData/%28S%28readwrite%29%29/OData.svc/";

// Northwind sample service
const string NorthwindV4ReadOnlyUri = "https://services.odata.org/V4/Northwind/Northwind.svc/";

// TripPin sample service
const string TripPinV4ReadWriteUri = "https://services.odata.org/V4/TripPinServiceRW/";

Documentation

For detailed documentation on each feature, see the Documentation folder:

• Querying Data - Filter, select, expand, order, page, search, aggregate
• CRUD Operations - Create, read, update, delete entities
• Batch Operations - Multiple operations in single request
• Singletons - Single-instance entities like /Me
• Media & Streams - Binary data and media entities
• Entity References - Managing relationships with $ref
• Delta Queries - Change tracking and synchronization
• Service Metadata - Discovery and schema information
• Functions & Actions - Custom operations
• Async Operations - Long-running operations
• Cross-Join - Combining multiple entity sets
• Open Types - Dynamic properties
• ETag & Concurrency - Optimistic concurrency control

License

MIT License - see LICENSE file for details.

Contributing

Contributions are welcome! Please open an issue or submit a pull request.