web api put 识别查询字符串但不识别正文 [英] web api put is recognizing query strings but not body

问题描述

当我将用户作为查询字符串传入(使用 $http 中的参数)并设置 web api 方法以在 uri 中查找它们时，一切都很顺利.但是当我按如下方式传递它们时，用户显示为空.我在这里错过了什么?

when i pass in users as a query string (using params in $http) and set the web api method to look for them in the uri everything is peachy. but when i pass them in as below, users shows up as null. what am i missing here?

角度函数

scope.saveChanges = function () {
        // create array of user id's
        var users = [];
        angular.forEach(scope.usersInRole, function (v, k) {
            users.push(v.Key);
        });

        var data = { user: users };

        var token = angular.element("input[name='__RequestVerificationToken']").val();

        // put changes on server
        http({
            url: config.root + 'api/Roles/' + scope.selectedRole + '/Users',
            method: 'PUT',
            data: data,
            contentType: "application/json; charset=utf-8",
            headers: { "X-XSRF-Token": token },
            xsrfCookieName: '__RequestVerificationToken'
        }).success(function (result) {
            // notify user changes were saved
            angular.element('#myModal').reveal({ closeOnBackgroundClick: false });
        });
    };

web api 操作

 public HttpResponseMessage Put(HttpRequestMessage request, [FromUri]string role, [FromBody]string[] user)
            {

                return request.CreateResponse(HttpStatusCode.NoContent);
            }

推荐答案

Try: data: users 而不是 data: data.

Try: data: users instead of data: data.

在asp.net api中，整个请求体都绑定到一个参数上.因此，您在操作方法参数中不能有多个参数和 [FromBody] .只有一个 => 我们不需要在请求正文中指定属性名称.

In asp.net api, the whole request body is bound to a parameter. For this reason, you cannot have multiple parameters with the [FromBody] in the action method parameters. There is only one => we don't need to specify a property name in the request body.

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