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MVCを使用してラジオボタンの3つの値をデータベースに挿入したい。ユーザーは各カテゴリ (壁、屋根、床) に対して 1 つのマテリアルを選択する必要があります

ここに画像の説明を入力

現在、ユーザーは 1 つの値しか選択できません (グループ化が必要な場合があります)。ただし、グループ化を行うと、structInfo 値のみがデータベースに挿入されます。データベースに挿入された 3 つの値すべてが必要です。

これは、データベースの設計がどのように見えるかです ここに画像の説明を入力

構造体 inf(walls,roof,floor) materialinfo は (bricks.concrete,woods など)

ユーザーが選択した3つの値をすべてデータベースに保存できますか?

これが私の見解です

 @foreach (var structIN in Model.structInfo)
                {
                    if (structIN.structId.Equals(1))
                    {
                        @Html.Label(structIN.structNm) @:   

                        foreach (var material in Model.materialInfo)
                        {
                            if (material.materialId.Equals(1) || material.materialId.Equals(2) || material.materialId.Equals(3))
                            {
                                @Html.RadioButtonFor(model => model.buildInfo.materialId, material.materialId)@Html.Label(material.materialNm)
                                @Html.HiddenFor(model => model.buildInfo.structId, new { Value = structIN.structId })

                            }

                        }
                    }

                    else if(structIN.structId.Equals(2))
                    {
                        <br />
                        @Html.Label(structIN.structNm) @:&nbsp; &nbsp;

                        foreach (var material2 in Model.materialInfo)
                        {
                            if (material2.materialId.Equals(2) || material2.materialId.Equals(4) || material2.materialId.Equals(5))
                            {
                                @Html.RadioButtonFor(model2 => model2.buildInfo.materialId, material2.materialId)@Html.Label(material2.materialNm)
                                @Html.HiddenFor(model2 => model2.buildInfo.structId, new { Value = structIN.structId })

                            }

                        }
                    }
                    else if (structIN.structId.Equals(3))
                    {
                        <br />
                        @Html.Label(structIN.structNm) @:&nbsp; &nbsp;

                        foreach (var material3 in Model.materialInfo)
                        {
                            if (material3.materialId.Equals(6) || material3.materialId.Equals(3))
                            {
                                @Html.RadioButtonFor(model3 => model3.buildInfo.materialId, material3.materialId)  @Html.Label(material3.materialNm)
                                @Html.HiddenFor(model3 => model3.buildInfo.structId, new { Value = structIN.structId })

                             }
                        }
                }
                }
4

1 に答える 1

1

私のGETメソッド

 [HttpGet]
    public ActionResult RegisterForm()
    {
        PopulateStructMaterialData();
        using (var dataBase = new TMXEntities())
        {
            var model = new RegisterInfoPA()
            {
                //OTHER CODES
            };

            return View(model);
        }
    }

データの入力

        private void PopulateStructMaterialData()
    {
        var list = new List<strucMaterial>
        {
            new strucMaterial{ifOthers = "", materialId = 1, materialNm = "Bricks", structId = 1, structNm = "Walls", insuranceReqId = 0, isSelected = false},
            new strucMaterial{ifOthers = "", materialId = 2, materialNm = "Concrete", structId = 1, structNm = "Walls", insuranceReqId = 0, isSelected = false},
            new strucMaterial{ifOthers = "", materialId = 3, materialNm = "Woods", structId = 1, structNm = "Walls", insuranceReqId = 0, isSelected = false},

            new strucMaterial{ifOthers = "", materialId = 2, materialNm = "Concrete", structId = 2, structNm = "Roof", insuranceReqId = 0, isSelected = false},
            new strucMaterial{ifOthers = "", materialId = 4, materialNm = "Tiles", structId = 2, structNm = "Roof", insuranceReqId = 0, isSelected = false},
            new strucMaterial{ifOthers = "", materialId = 5, materialNm = "Zinc", structId = 2, structNm = "Roof", insuranceReqId = 0, isSelected = false},

            new strucMaterial{ifOthers = "", materialId = 3, materialNm = "Woods", structId = 3, structNm = "Floor", insuranceReqId = 0, isSelected = false},
            new strucMaterial{ifOthers = "", materialId = 6, materialNm = "Reinforced Concrete", structId = 3, structNm = "Floor", insuranceReqId = 0, isSelected = false},

        };
       ViewBag.populatebuilding = list;
    }

ビューで

  List<Insurance.ViewModels.strucMaterial> viewModelSM = ViewBag.populatebuilding;
  for(int i=0; i<viewModelSM.Count; i++)
  {
                    @Html.DisplayFor(m => viewModelSM[i].structNm)
                    @Html.HiddenFor(m => viewModelSM[i].structId)

                    @Html.CheckBoxFor(m => viewModelSM[i].isSelected)

                    @Html.HiddenFor(m => viewModelSM[i].materialId)
                    @Html.Label(viewModelSM[i].materialNm)
  }

私の POST メソッド

 [HttpPost]
    public ActionResult RegisterForm(RegisterInfoPA viewmodel, List<strucMaterial> list)
    {
        using (var dataBase = new TMXEntities())
        {
            var model = new RegisterInfoPA()
            {
              //OTHER CODES
            };

            if (ModelState.IsValid)
            {
                //OTHER CODES
                var register = viewmodel.reg;
                var personalinfo = viewmodel.pinfo;

                //Save Register
                db.registers.Add(register);
                db.SaveChanges();
                //Retriving required Id's
                var getid = register.registrationId;
                var getRegTypeID = register.regisTypeId;

                //SAVE PERSONAL INFO
                personalinfo.registrationId = getid;
                db.personalInfoes.Add(personalinfo);
                db.SaveChanges();

              //---HOW SHOULD I SAVE THE CHECKBOX HERE?-----------                                  
              **> tHIS IS MY CODE, BUT IT IS NOT WORKING**
                foreach(var item in list) (<< error starts here)
                {
                    buildingInfo.materialId = item.materialId;
                    buildingInfo.structId = item.structId;
                    buildingInfo.insuranceReqId = item.insuranceReqId;
                    db.buildingInfoes.Add(buildingInfo);
                }
                db.SaveChanges();
            }
       }
    }

私はいつもこのエラーが発生しています

System.NullReferenceException: オブジェクト参照がオブジェクトのインスタンスに設定されていません。

適切なコードはどのように見えるべきですか? ありがとうございました。

于 2016-05-17T08:10:12.903 に答える