如何在列表C#MVC中检索特定值

我想根据列表本身的特定Id从列表中检索特定值。

这是我的列表值

    public List<strucMaterial> PopulateStructMaterialData()
    {
      List<strucMaterial> populateStructure = new List<strucMaterial>();
        {

            populateStructure.Add(new strucMaterial(){Id = 1, ifOthers = "", materialId = 1, materialNm = "Bricks", structId = 1, structNm = "Walls", insuranceReqId = 0});
            populateStructure.Add(new strucMaterial(){Id = 2, ifOthers = "", materialId = 2, materialNm = "Concrete", structId = 1, structNm = "Walls", insuranceReqId = 0});
            populateStructure.Add(new strucMaterial(){Id = 3, ifOthers = "", materialId = 3, materialNm = "Woods", structId = 1, structNm = "Walls", insuranceReqId = 0});

            populateStructure.Add(new strucMaterial(){Id = 4, ifOthers = "", materialId = 2, materialNm = "Concrete", structId = 2, structNm = "Roof", insuranceReqId = 0});
            populateStructure.Add(new strucMaterial(){Id = 5, ifOthers = "", materialId = 4, materialNm = "Tiles", structId = 2, structNm = "Roof", insuranceReqId = 0});
            populateStructure.Add(new strucMaterial(){Id = 6, ifOthers = "", materialId = 5, materialNm = "Zinc", structId = 2, structNm = "Roof", insuranceReqId = 0});

            populateStructure.Add(new strucMaterial(){Id = 7, ifOthers = "", materialId = 3, materialNm = "Woods", structId = 3, structNm = "Floor", insuranceReqId = 0});
            populateStructure.Add(new strucMaterial(){Id = 8, ifOthers = "", materialId = 6, materialNm = "Reinforced Concrete", structId = 3, structNm = "Floor", insuranceReqId = 0});

        };
        ViewBag.populatebuilding = populateStructure;
        return populateStructure;
    }

我的观点

                  @{

               List<Insurance.ViewModels.strucMaterial> viewModelSM = ViewBag.populatebuilding;

                for (int i = 0; i < viewModelSM.Count; i++)
                {
                    @Html.Label(viewModelSM[i].structNm)
                    @Html.CheckBox("structureMat", new { @id = "structureMat", @value = viewModelSM[i].Id })
                    @Html.Label(viewModelSM[i].materialNm)
                  <br />
                }

             }

@{
列表viewModelSM=ViewBag.populatebuilding；
对于（int i=0；i
}
}

这是我检索materialID和structID的方式

                            int idArray = Convert.ToInt32(structureMat[i]);                     
                        List<strucMaterial> populateID = PopulateStructMaterialData();


                        for (int s = 0; s < populateID.Count; s++ )
                        {

                            if (populateID[s].Id.Equals(idArray))
                            {
                                int matID = populateID[s].materialId;
                                int structID = populateID[s].structId;

                                int a = matID;

                            }
                  }

int-idArray=Convert.ToInt32（structureMat[i]）；
List populateID=PopulateStructMaterialData（）；
for（int s=0；s

它只获取元素的索引值，而不是materialdid和structID值。我的问题是为什么它只读到populateID[s]。。？为什么不将填充作为一个整体进行阅读

---

谢谢你

对一篇评论的补充哈里·普拉萨德：

---

您可以使用和写入

populateID。首先（x=>x.Id==idArray）。materialId

使用`populateID[s].materialId`访问

materialId

时是否有错误？没有，根本没有错误……我如何仅检索materialId：（如果您想从查询中单独使用

materiald

，您可以简单地执行此操作。

populateID.Where（x=>x.Id==idArray）。选择（x=>x.materialId）

您的代码看起来很好，您是否尝试过构建、刷新或重新连接？尝试一下，它可以工作！！我只是构建了我的项目刷新并重新打开，然后它现在就显示了值。我太傻了

                            int idArray = Convert.ToInt32(structureMat[i]);                     
                        List<strucMaterial> populateID = PopulateStructMaterialData();


                        for (int s = 0; s < populateID.Count; s++ )
                        {

                            if (populateID[s].Id.Equals(idArray))
                            {
                                int matID = populateID[s].materialId;
                                int structID = populateID[s].structId;

                                int a = matID;

                            }
                  }