c#web api无法从web调用

web api 解决方案 模型 和 .

这是我的一个例子 模型 :

public class Category
{
    [Key]
    public int Id { get; set; }
    [Required]
    public string Name { get; set; }
}

这是他的 控制器 :

public class CategoriesController : ApiController
{
    private FrigoWebServiceContext db = new FrigoWebServiceContext();

    // GET: api/Categories
    [HttpGet]
    public string GetCategories()
    {
        return JsonConvert.SerializeObject(db.Categories.ToList());
    }

    // GET: api/Categories/5
    [ResponseType(typeof(string))]
    public string GetCategory(int id)
    {
        Category category = db.Categories.Find(id);
        if (category == null)
        {
            return null;
        }

        string jsonCategory = JsonConvert.SerializeObject(category);
        return jsonCategory;
    }

    protected override void Dispose(bool disposing)
    {
        if (disposing)
        {
            db.Dispose();
        }
        base.Dispose(disposing);
    }

    private bool CategoryExists(int id)
    {
        return db.Categories.Count(e => e.Id == id) > 0;
    }
}

现在,这是 配置 :

        config.Routes.MapHttpRoute(
            name: "GetId",
            routeTemplate: "api/{controller}/{id}"
            //defaults: new { id = RouteParameter.Optional }
        );
        config.Routes.MapHttpRoute(
            name: "GetAll",
            routeTemplate: "api/{controller}"
            //defaults: new { id = RouteParameter.Optional }
        );

但是打电话给以下网站,我什么都没有得到

注意:我使用IIS发布了带有“的api” myAppName “路径名

• http://localhost/myAppName/Api/CategoriesController
• http://localhost/myAppName/Api/CategoriesController/0
• http://localhost/myAppName/Api/Category
• http://localhost/myAppName/Api/Category/0
• http://localhost/myAppName/Api/CategoriesController/GetCategories
• http://localhost/myAppName/Api/Category/GetCategories
• http://localhost/myAppName/Api/Categories

但没有一个是有效的

这是 错误 :

错误HTTP 404.0-未找到所需资源已被删除,

我在互联网上看到了一些问题,我试图使用它们,但我不明白为什么这不起作用。

任何帮助都将不胜感激,这是我第一次使用WebApi

这是我的 Web.Config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <connectionStrings>
    <add name="FrigoWebServiceContext" connectionString= [***] />
  </connectionStrings>
  <appSettings></appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" />
    <httpModules>
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" />
    </httpModules>
  </system.web>
  <system.webServer>
    <handlers>
      <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
      <remove name="OPTIONSVerbHandler" />
      <remove name="TRACEVerbHandler" />
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
    </handlers>
    <validation validateIntegratedModeConfiguration="false" />
    <modules>
      <remove name="ApplicationInsightsWebTracking" />
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" preCondition="managedHandler" />
    </modules>
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-9.0.0.0" newVersion="9.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <system.codedom>
    <compilers>
      <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:6 /nowarn:1659;1699;1701" />
      <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:14 /nowarn:41008 /define:_MYTYPE=\&quot;Web\&quot; /optionInfer+" />
    </compilers>
  </system.codedom>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
</configuration>