[英]ajax sending null to MVC Api Controller
我試圖通過 Ajax 將變量作為 vm 從視圖發送到 API 控制器,但在控制器中,獲取它的方法的參數為空! 錯誤是:EntityFramework.SqlServer.dll 中發生了“System.NotSupportedException”類型的異常,但未在用戶代碼中處理
查詢代碼:
var vm = {
courseIds: []
};
var courses = new Bloodhound({
datumTokenizer: Bloodhound.tokenizers.obj.whitespace('name'),
queryTokenizer: Bloodhound.tokenizers.whitespace,
remote: {
url: '/api/Course/GetCourses?query=%QUERY',
wildcard: '%QUERY'
}
});
var teachers = new Bloodhound({
datumTokenizer: Bloodhound.tokenizers.obj.whitespace('name'),
queryTokenizer: Bloodhound.tokenizers.whitespace,
remote: {
url: '/api/Teacher/?query=%QUERY',
wildcard: '%QUERY'
}
});
$('#teacher').typeahead({
minLength: 1,
highlight: true
},
{
name: 'teachers',
display: 'Name',
source: teachers
}).on("typeahead:select",
function(e, teacher) {
vm.teacherId = teacher.Id;
});
$("#courses").typeahead({
minLength: 1,
highlight: true
},
{
name: 'courses',
display: 'Name',
source: courses
}).on("typeahead:select",
function(e, course1) {
$("#courselist").append("<li class='list-group-item'>" + course1.Name + "</li>");
$("#courses").typeahead("val", "");
vm.courseIds.push(course1.Id);
console.log(vm);
});
$("#newPlan").submit(function(e) {
e.preventDefault();
$.ajax({
url: "/api/new/",
method: "post",
data: vm
}).done(function() {
console.log("Done!");
})
.fail(function() {
});
});
控制器代碼是:
[HttpPost]
public IHttpActionResult Plan(NewPlanDto coursePlan)
{
var teacher = _context.teachers.Single(m => m.Id == coursePlan.TeacherId);
var courses = _context.Courses.Where(
m => coursePlan.coursesId.Contains(m.Id)).ToList();
if (courses != null)
{
foreach (var course in courses)
{
var newCoursePlan = new CoursPlan()
{
Teacher = teacher,
Course = course
};
_context.CoursPlans.Add(newCoursePlan);
}
}
_context.SaveChanges();
return Ok();
}
領事結果:
courseIds: Array [ 4, 4 ] TeacherId: 6
您的問題是您在將對象發送到控制器時沒有對其進行序列化。
例如:
$.ajax({
url: "/api/new/",
method: "post",
data: JSON.stringify(vm)
}).done(function() {
console.log("Done!");
})
.fail(function() {
});
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