DefaultInlineContraintResolver错误的WebAPI 2 [英] DefaultInlineContraintResolver Error in WebAPI 2

问题描述

我使用的Web API 2，我收到以下错误，当我发个帖子在我的本地主机使用的是IIS 7.5我的API的方法。

I'm using Web API 2 and I'm getting the following error when I send a POST to my API method using IIS 7.5 on my local box.

The inline constraint resolver of type 'DefaultInlineConstraintResolver' was unable to resolve the following inline constraint: 'string'.

Line 21: GlobalConfiguration.Configuration.EnsureInitialized();

我做工的API使用IIS的无。不过，我可以使用IIS防爆preSS运行在Visual Studio我的API项目，并成功地使一个后到我的登录API，但是当我试图使一个GET请求到另一个API调用，我得到的约束解析错误。

None of my APIs work using IIS. However, I'm able to run my API project in Visual Studio using IIS Express and successfully make a POST to my login API, but when I try and make a GET request to another API call, I get the constraint resolver error.

为了解决这个问题，我创造了在Visual Studio中一个全新的Web API 2项目，并开始导入现有的API为同时新的项目之一，并运行它们，以确保他们的工作。使用IIS防爆preSS这个新项目，我得到完全相同的结果，因为我用我现有的API项目做到了。

In order to troubleshoot this, I created a brand new Web API 2 project in Visual Studio and started importing the existing APIs into the new project one at a time and running them to ensure they work. Using IIS Express with this new project, I get the same exact results as I did with my existing API project.

我缺少的是在这里吗？即使有一个全新的项目，我无法使GET请求，而不会在此约束解析问题。

What am I missing here? Even with a brand new project I'm not able to make GET requests without running into this constraint resolver issue.

推荐答案

由于错误表示，在 DefaultInlineConstraintResolver 该Web API附带没有所谓的内嵌约束字符串。默认支持的是以下内容：

As the error indicates, the DefaultInlineConstraintResolver that Web API ships with does not have an inline constraint called string. The default supported ones are the following:

// Type-specific constraints
{ "bool", typeof(BoolRouteConstraint) },
{ "datetime", typeof(DateTimeRouteConstraint) },
{ "decimal", typeof(DecimalRouteConstraint) },
{ "double", typeof(DoubleRouteConstraint) },
{ "float", typeof(FloatRouteConstraint) },
{ "guid", typeof(GuidRouteConstraint) },
{ "int", typeof(IntRouteConstraint) },
{ "long", typeof(LongRouteConstraint) },

// Length constraints
{ "minlength", typeof(MinLengthRouteConstraint) },
{ "maxlength", typeof(MaxLengthRouteConstraint) },
{ "length", typeof(LengthRouteConstraint) },

// Min/Max value constraints
{ "min", typeof(MinRouteConstraint) },
{ "max", typeof(MaxRouteConstraint) },
{ "range", typeof(RangeRouteConstraint) },

// Regex-based constraints
{ "alpha", typeof(AlphaRouteConstraint) },
{ "regex", typeof(RegexRouteConstraint) }

这篇关于DefaultInlineContraintResolver错误的WebAPI 2的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！