<code>config.SetDocumentationProvider(new XmlDocumentationProvider(HttpContext.Current.Server.MapPath("~/App_Data/WebApiDemo.xml")));

 HelpPageConfig.cs完整文件入下：

// Uncomment the following to provide samples for PageResult<T>. Must also add the Microsoft.AspNet.WebApi.OData

// package to your project.

#define Handle_PageResultOfT

using System;

using System.Collections;

using System.Collections.Generic;

using System.Diagnostics;

using System.Diagnostics.CodeAnalysis;

using System.Linq;

using System.Net.Http.Headers;

using System.Reflection;

using System.Web;

using System.Web.Http;

#if Handle_PageResultOfT

using System.Web.Http.OData;

#endif

namespace WebApiDemo.Areas.HelpPage

{

/// <summary>

/// Use this class to customize the Help Page.

/// For example you can set a custom <see cref="System.Web.Http.Description.IDocumentationProvider"/> to supply the documentationcode>

/// or you can provide the samples for the requests/responses.

/// </summary>

public static class HelpPageConfig

{

[SuppressMessage("Microsoft.Globalization", "CA1303:Do not pass literals as localized parameters",

MessageId = "WebApiDemo.Areas.HelpPage.TextSample.#ctor(System.String)",

Justification = "End users may choose to merge this string with existing localized resources.")]

[SuppressMessage("Microsoft.Naming", "CA2204:Literals should be spelled correctly",

MessageId = "bsonspec",

Justification = "Part of a URI.")]

public static void Register(HttpConfiguration config)

{

Uncomment the following to use the documentation from XML documentation file.

//config.SetDocumentationProvider(new XmlDocumentationProvider(HttpContext.Current.Server.MapPath("~/App_Data/XmlDocument.xml")));

Uncomment the following to use "sample string" as the sample for all actions that have string as the body parameter or return type.

Also, the string arrays will be used for IEnumerable<string>. The sample objects will be serialized into different media type

formats by the available formatters.

//config.SetSampleObjects(new Dictionary<Type, object>

//{

// {typeof(string), "sample string"},

// {typeof(IEnumerable<string>), new string[]{"sample 1", "sample 2"}}

//});

// Extend the following to provide factories for types not handled automatically (those lacking parameterless

// constructors) or for which you prefer to use non-default property values. Line below provides a fallback

// since automatic handling will fail and GeneratePageResult handles only a single type.

#if Handle_PageResultOfT

config.GetHelpPageSampleGenerator().SampleObjectFactories.Add(GeneratePageResult);

#endif

// Extend the following to use a preset object directly as the sample for all actions that support a media

// type, regardless of the body parameter or return type. The lines below avoid display of binary content.

// The BsonMediaTypeFormatter (if available) is not used to serialize the TextSample object.

config.SetSampleForMediaType(

new TextSample("Binary JSON content. See http://bsonspec.org for details."),

new MediaTypeHeaderValue("application/bson"));

Uncomment the following to use "[0]=foo&[1]=bar" directly as the sample for all actions that support form URL encoded format

and have IEnumerable<string> as the body parameter or return type.

//config.SetSampleForType("[0]=foo&[1]=bar", new MediaTypeHeaderValue("application/x-www-form-urlencoded"), typeof(IEnumerable<string>));

Uncomment the following to use "1234" directly as the request sample for media type "text/plain" on the controller named "Values"

and action named "Put".

//config.SetSampleRequest("1234", new MediaTypeHeaderValue("text/plain"), "Values", "Put");

Uncomment the following to use the image on "../images/aspNetHome.png" directly as the response sample for media type "image/png"

on the controller named "Values" and action named "Get" with parameter "id".

//config.SetSampleResponse(new ImageSample("../images/aspNetHome.png"), new MediaTypeHeaderValue("image/png"), "Values", "Get", "id");

Uncomment the following to correct the sample request when the action expects an HttpRequestMessage with ObjectContent<string>.

The sample will be generated as if the controller named "Values" and action named "Get" were having string as the body parameter.

//config.SetActualRequestType(typeof(string), "Values", "Get");

Uncomment the following to correct the sample response when the action returns an HttpResponseMessage with ObjectContent<string>.

The sample will be generated as if the controller named "Values" and action named "Post" were returning a string.

//config.SetActualResponseType(typeof(string), "Values", "Post");

config.SetDocumentationProvider(new XmlDocumentationProvider(HttpContext.Current.Server.MapPath("~/App_Data/WebApiDemo.xml")));

}

#if Handle_PageResultOfT

private static object GeneratePageResult(HelpPageSampleGenerator sampleGenerator, Type type)

{

if (type.IsGenericType)

{

Type openGenericType = type.GetGenericTypeDefinition();

if (openGenericType == typeof(PageResult<>))

{

// Get the T in PageResult<T>

Type[] typeParameters = type.GetGenericArguments();

Debug.Assert(typeParameters.Length == 1);

// Create an enumeration to pass as the first parameter to the PageResult<T> constuctor

Type itemsType = typeof(List<>).MakeGenericType(typeParameters);

object items = sampleGenerator.GetSampleObject(itemsType);

// Fill in the other information needed to invoke the PageResult<T> constuctor

Type[] parameterTypes = new Type[] { itemsType, typeof(Uri), typeof(long?), };

object[] parameters = new object[] { items, null, (long)ObjectGenerator.DefaultCollectionSize, };

// Call PageResult(IEnumerable<T> items, Uri nextPageLink, long? count) constructor

ConstructorInfo constructor = type.GetConstructor(parameterTypes);

return constructor.Invoke(parameters);

}

}

return null;

}

#endif

}

}

3、测试接口