没有HTTP资源发现，在网页API相匹配的请求URI [英] No HTTP resource was found that matches the request URI in Web API

问题描述

我已经配置我的WebApiConfig是这样的：

 公共静态无效的注册（HttpConfiguration配置）
{
    config.Routes.MapHttpRoute（
        名称：DefaultApi
        routeTemplate：API / {控制器} / {行动} / {ID}
        默认：新{ID = RouteParameter.Optional}
    ）;
}
 

我有一个接受一个参数的方法。在访问URI是的http：//本地主机：8598 / API /的WebAPI / GetLocationCategory / 87

这给了我一个错误：无HTTP资源发现，请求URI相匹配的http：//本地主机：8598 / API /的WebAPI / GetLocationCategory / 87

控制器：

 公开的IEnumerable＆LT; LocationCategory_CLS＆GT; GetLocationCategory（INT CATID）
{
    VAR LocCats =（LCT从在entities.tdp_LocationCategories加入LC在entities.tdp_LocationMaster上lct.FK_LocationID等于lc.LocationID哪里lct.IsApproved == 0安培;＆安培; lct.FK_CategoryID == CATID选择新的{lc.LocationID，LC。 LOCATIONNAME}）了ToList（）。
    清单＆LT; LocationCategory_CLS＆GT; LOC =新的List＆LT; LocationCategory_CLS＆GT;（）;    的foreach（在LocCats VAR元素）
    {
        loc.Add（新LocationCategory_CLS
        {
            LocationID = element.LocationID，
            LOCATIONNAME = element.LocationName
        }）;
    }
    回禄;
}
 

解决方案

试着改变你的控制器方法

 公开的IEnumerable＆LT; LocationCategory_CLS＆GT; GetLocationCategory（INT ID）LT;  - 更改
{
    VAR LocCats =（LCT从在entities.tdp_LocationCategories加入LC在entities.tdp_LocationMaster上lct.FK_LocationID等于lc.LocationID哪里lct.IsApproved == 0安培;＆安培; lct.FK_CategoryID == ID选择新的{lc.LocationID，LC。 LOCATIONNAME}）了ToList（）。
    清单＆LT; LocationCategory_CLS＆GT; LOC =新的List＆LT; LocationCategory_CLS＆GT;（）;    的foreach（在LocCats VAR元素）
    {
        loc.Add（新LocationCategory_CLS
        {
            LocationID = element.LocationID，
            LOCATIONNAME = element.LocationName
        }）;
    }
    回禄;
}
 

变化是唯一的，改变从 CATID 输入参数 ID ....它为我很多次..

修改

---

它的很长一段时间，当我回头看的的我觉得的我知道原因了。 的话像贾里德是正确的，这一切都与我们指定路由做。如果我有一个路径（默认值）为：

  routes.MapRoute（
        默认，//路线名称
        {控制器} / {行动} / {ID}，// URL带参数
        新{控制器=家，行动=索引，ID =} //参数默认
    ）;
 

和我的网址 / myController的/ GetLocationCategory / 123 ，这将等同于 / myController的/ GetLocationCategory？ID = 123 。

同样，如果我想改变我的参数名称编号说CATID，那么我需要更改查询字符串参数（我打电话给我的控制器操作会改变的方式）。现在是：

/ myController的/ GetLocationCategory？CATID = 123

I have configured my WebApiConfig like this:

public static void Register(HttpConfiguration config)
{
    config.Routes.MapHttpRoute(
        name: "DefaultApi",
        routeTemplate: "api/{controller}/{action}/{id}",
        defaults: new { id = RouteParameter.Optional }
    );
}

I have one method which accepts one parameter. The accessing URI is http://localhost:8598/api/WebApi/GetLocationCategory/87.

This gives me an error: No HTTP resource was found that matches the request URI 'http://localhost:8598/api/WebApi/GetLocationCategory/87'

Controller:

public IEnumerable<LocationCategory_CLS> GetLocationCategory(int CatID)
{
    var LocCats = (from lct in entities.tdp_LocationCategories join lc in entities.tdp_LocationMaster on lct.FK_LocationID equals lc.LocationID where lct.IsApproved == 0 && lct.FK_CategoryID == CatID select new { lc.LocationID, lc.LocationName }).ToList();
    List<LocationCategory_CLS> loc = new List<LocationCategory_CLS>();

    foreach (var element in LocCats)
    {
        loc.Add(new LocationCategory_CLS
        {
            LocationID = element.LocationID,
            LocationName = element.LocationName
        });
    }
    return loc;
}

解决方案

Try changing your Controller method as

public IEnumerable<LocationCategory_CLS> GetLocationCategory(int id) <-- Change
{
    var LocCats = (from lct in entities.tdp_LocationCategories join lc in entities.tdp_LocationMaster on lct.FK_LocationID equals lc.LocationID where lct.IsApproved == 0 && lct.FK_CategoryID == id select new { lc.LocationID, lc.LocationName }).ToList();
    List<LocationCategory_CLS> loc = new List<LocationCategory_CLS>();

    foreach (var element in LocCats)
    {
        loc.Add(new LocationCategory_CLS
        {
            LocationID = element.LocationID,
            LocationName = element.LocationName
        });
    }
    return loc;
}

The change is only, changing input parameter from CatId to id.... It works for me many times..

Edit :

---

Its a long time when I look back I think I know the reason now. Words Like Jared is correct, it's all to do with Routing which we specify. If I have a route(default) as :

routes.MapRoute(
        "Default",                                              // Route name
        "{controller}/{action}/{id}",                           // URL with parameters
        new { controller = "Home", action = "Index", id = "" }  // Parameter defaults
    );

And my URL is /MyController/GetLocationCategory/123, it will be equivalent to /MyController/GetLocationCategory?id=123.

Similarly, if I want to change my parameter name for Id to say CatId, then I need to change the query string parameter(the way I am calling my Controller Action would change). Which would now be :

/MyController/GetLocationCategory?CatId=123

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