我正在浏览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,但它确实有效。但后来我开始使用他们在示例中使用的Product
模型。我添加了一个新属性作为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);
}
}
问题是,当我转到/odata/Products(one)
时,字符串“one”未绑定到GetEntityByKey(string key)
操作中的键参数。但是,当我浏览odata/Products(1)
时,“1”会绑定到key
参数。
如何才能获得一个文本值正确绑定的字符串,而不是仅仅使用数值绑定字符串?
我忘了包含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);
}
}
答案 0 :(得分:8)
我注意到路径/ odata / Products(0011-1100)只会将“0011”绑定为字符串键。
在玩了一些之后,我发现以下路径可以按照我的希望运行:
/odata/Products('one')
看起来需要单引号来读取括号内的整个字符串。