c#async-await ToListAsync返回未定义

Question

public async Task<JsonResult> getEmployee(int roleId)
{
    var emp = await db.tbl_employee.Where(e => e.roleId == roleId).ToListAsync();
    return Json(emp, JsonRequestBehavior.AllowGet);
}

public async Task<JsonResult> getEmployee(int roleId)
{
    var emp = db.tbl_employee.Where(e => e.roleId == roleId).ToListAsync();
    return Json(emp, JsonRequestBehavior.AllowGet);
}

它会返回我想要的结果。我还从https://stackoverflow.com/a/25899982/9367841尝试了这个

public async Task<JsonResult> getEmployee(int roleId)
{
    var emp = await db.tbl_employee.Where(e => e.roleId == roleId).ToListAsync().ConfigureAwait(false);
    return Json(emp, JsonRequestBehavior.AllowGet);
}

但不管用。

Answer 1

我终于解决了。

如果正在使用此操作

public async Task<JsonResult> getEmployee(int roleId)
{
    var emp = db.tbl_employee.Where(e => e.roleId == roleId).ToListAsync();
    return Json(emp, JsonRequestBehavior.AllowGet);
}

//我正在使用angularjs从服务器获取数据

$http.post("../controller/getEmployee", { roleId: id }).then(function (r) {
      console.log(r.data);
})

{Result: Array(1), Id: 50, Exception: null, Status: 5, IsCanceled: false, …}
AsyncState: null
CreationOptions: 0
Exception: null
Id: 50
IsCanceled: false
IsCompleted: true
IsFaulted: false
Result: [{…}]
Status: 5
__proto__: Object

$http.post("../controller/getEmployee", { roleId: id }).then(function (r) {
      $scope.list = r.data["Result"];
})

public async Task<JsonResult> getEmployee(int roleId)
{
    var emp = await db.tbl_employee.Where(e => e.roleId == roleId).ToListAsync();
    return Json(emp, JsonRequestBehavior.AllowGet);
}

$http.post("../controller/getEmployee", { roleId: id }).then(function (r) {
      $scope.list = r.data;
})