当一个或多个字段为空时，输入文本框值不保存到数据库

Question

我正在使用angular with entity framework将数据保存到SQL后端数据库。

当我填写网络表单中的所有字段时，它会保存到数据库中。如果我将一个字段留空（这不是必需的），则没有任何项目保存到数据库中。数据库列都可以为空。

这是JS：

        $scope.saveData = function () {
        $http.post("/AddTeam/SaveData", {
            recordID: $scope.formGuid,
            GenAddress1: $scope.formData.GenAddress1,
            GenAddress2: $scope.formData.GenAddress2,
            GenAddress3: $scope.formData.GenAddress3,
            GenCity: $scope.formData.GenCity,
            GenPostCode: $scope.formData.GenPostCode,
            GenPhoneNo: $scope.formData.GenPhoneNo,
            GenFaxNo: $scope.formData.GenFaxNo,
            TodaysDate: $scope.TodaysDate,
            GenDeactivationDate: $scope.formData.GenDeactivationDate
        })
            .success(function (result) {
                $scope.teams = result;
            })
            .error(function (data) {
                console.log(data);
            });
    }

这是C＃中的Controller

    [HttpPost]
    public void SaveData(string recordID, string GenAddress1, string GenAddress2, string GenAddress3, string GenCity,
        string GenPostCode, string GenPhoneNo, string GenFaxNo, DateTime TodaysDate, DateTime GenDeactivationDate)
    {
        var db = new MYDBEntities();
        db.WebForms_MyTable.Add(new WebForms_MyTable()
        {
           RecordID = recordID,
           AddressLine1 = GenAddress1,
           AddressLine2 = GenAddress2,
           AddressLine3 = GenAddress3,
           City = GenCity,
           Postcode = GenPostCode,
           PhoneNumber = GenPhoneNo,
           FaxNumber = GenFaxNo,
           ActivationDate = TodaysDate,
           DeactivationDate = GenDeactivationDate
        });

你知道为什么会这样吗？

感谢

Answer 1

好的，我通过将DateTime字段的声明从'DateTime'更改为'DateTime？'来修复它。

[HttpPost]
public void SaveData(string recordID, string GenAddress1, string GenAddress2, string GenAddress3, string GenCity,
    string GenPostCode, string GenPhoneNo, string GenFaxNo, DateTime? TodaysDate, DateTime? GenDeactivationDate)
{
    var db = new MYDBEntities();
    db.WebForms_MyTable.Add(new WebForms_MyTable()
    {
       RecordID = recordID,
       AddressLine1 = GenAddress1,
       AddressLine2 = GenAddress2,
       AddressLine3 = GenAddress3,
       City = GenCity,
       Postcode = GenPostCode,
       PhoneNumber = GenPhoneNo,
       FaxNumber = GenFaxNo,
       ActivationDate = TodaysDate,
       DeactivationDate = GenDeactivationDate
    });