如何 $http 获取带有标识符的呼叫

Question

我需要使用 id 作为标识符进行 get 调用。我只使用 Angular 资源完成了此操作，而不是 $http。我不了解 $http 如何与 Angular 一起工作。

角度控制器

  $scope.EmailPdf = function () {
    $http.get('/api/Pdf/{id}').success(function () {
        $scope.PrintPreviewModal();
    });
}

路由

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

api 控制器

      public string Get(int id)
        {
        JobDataAdapter adapter = new JobDataAdapter();
        Job job = new Job();
        job = adapter.GetJob(id);
        if (job == null)
        {
            return string.Empty;
        }

        try
        {

错误信息

{"$id":"1","Message":"The request is invalid.","MessageDetail":"The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System.Int32' for method 'System.String Get(Int32)' in 'TexasExterior.Controllers.PdfController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter."}

更新 网页配置

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

控制器

$scope.EmailPdf = function () {
    $http.get('/api/Pdf/', { id: id }).success(function () {
        $scope.PrintPreviewModal();
    });
}

错误信息

ReferenceError: id 未定义

控制器

 var id=1    
$scope.EmailPdf = function () {
    $http.get('/api/Pdf?id=id').success(function () {
        $scope.PrintPreviewModal();
});

}

错误信息

{"$id":"1","Message":"请求无效。","MessageDetail":"参数字典包含不可为空类型'System.'的参数'id'的空条目。 'TexasExterior.Controllers.PdfController' 中方法 'System.String Get(Int32)' 的 Int32'。可选参数必须是引用类型、可空类型或声明为可选参数。"}

控制器

var _id = 1;
var URL = '/api/Pdf';
$scope.EmailPdf = function () {
    $http.get(URL, { id: _id }).success(function () {
        $scope.PrintPreviewModal();
    });
}

错误信息

{"$id":"1","Message":"No HTTP resource was found that matches the request URI 'http://localhost:44301/api/Pdf'.","MessageDetail":"No action was found on the controller 'Pdf' that matches the request."}

Answer 1

怎么样

  $http.get(URL,{id:id})

即作为地图或字符串的 get 调用的第二个参数传入您的参数。

Answer 2

您的id 未定义

PdfController

将您的配置路由更新为：

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

否则你可以使用不同的语法，即：

 var id=1    
 $scope.EmailPdf = function () {
    $http.get('/api/Pdf?id=id).success(function () {
        $scope.PrintPreviewModal();
    });
}

或

 var _id=1;   
 var URL='/api/Pdf' ;
 $scope.EmailPdf = function () {
   $http.get(URL,{id:_id}).success(function () {
        $scope.PrintPreviewModal();
    });
}

更新

var _id=1;   
var URL='/api/Pdf/' ;
$scope.EmailPdf = function () {
    $http.get(URL,{id:_id}).success(function () {
        $scope.PrintPreviewModal();
    });
}

错误信息

$id: "1"
 Message: "No HTTP resource was found that matches the request URI 'http://localhost:44301/api/Pdf/'."
   MessageDetail: "No action was found on the controller 'Pdf' that matches the request."

其他选项

  var id=1    
$scope.EmailPdf = function () {
    $http.get('/api/Pdf?id=id').success(function () {
        $scope.PrintPreviewModal();
});
}

错误信息

{"$id":"1","Message":"The request is invalid.","MessageDetail":"The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System.Int32' for method 'System.String Get(Int32)' in 'TexasExterior.Controllers.PdfController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter."}

Answer 3

我唯一需要的是

公共字符串获取(int id=1)

我最初发布的代码不需要更改。不过还是谢谢