我正在阅读来自 asp.net 的简短 Web Api + OData 教程：http ://www.asp.net/web-api/overview/odata-support-in-aspnet-web-api/getting-started-with -odata-in-web-api/create-a-read-only-odata-endpoint。
我下载了示例项目，它可以工作。但后来我开始Product使用他们在示例中使用的模型。我添加了一个新属性来充当字符串类型的键而不是整数键。
新的 Product.cs：
public class Product
{
public string stringKey { get; set; }
public int ID { get; set; }
public string Name { get; set; }
public decimal Price { get; set; }
public string Category { get; set; }
}
修改后的控制器：
public class ProductsController : EntitySetController<Product, string>
{
static List<Product> products = new List<Product>()
{
new Product() { stringKey = "one", ID = 1, Name = "Hat", Price = 15, Category = "Apparel" },
new Product() { stringKey = "two", ID = 2, Name = "Socks", Price = 5, Category = "Apparel" },
new Product() { stringKey = "three", ID = 3, Name = "Scarf", Price = 12, Category = "Apparel" },
new Product() { stringKey = "four", ID = 4, Name = "Yo-yo", Price = 4.95M, Category = "Toys" },
new Product() { stringKey = "five", ID = 5, Name = "Puzzle", Price = 8, Category = "Toys" },
};
[Queryable]
public override IQueryable<Product> Get()
{
return products.AsQueryable();
}
protected override Product GetEntityByKey(string key)
{
return products.FirstOrDefault(p => p.stringKey == key);
}
}
麻烦的是，当我转到/odata/Products(one)字符串“one”时，它并没有绑定到GetEntityByKey(string key)动作中的关键参数。但是，当我浏览到odata/Products(1)“1”时确实会绑定到key参数。
如何正确绑定带有文本值的字符串，而不仅仅是绑定带有数值的字符串？
更新
我忘了包括 WebApiConfig：
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
ODataModelBuilder modelBuilder = new ODataConventionModelBuilder();
modelBuilder.EntitySet<Product>("Products");
Microsoft.Data.Edm.IEdmModel model = modelBuilder.GetEdmModel();
config.Routes.MapODataRoute("ODataRoute", "odata", model);
}
}