Question

我正在从InfluxDB数据库中读取数据。该查询的结果是对象类型，我需要将此数据传递给具有两个变量的模块。

型号：

 public class DashboardViewModel
 {
      public string time { get; set; }
      public string valor { get; set; }
 }

我在其中执行查询的异步任务

public async Task<List<Serie>> ConsultaBD()
{
    var _client = new InfluxDb("http://host:8086/", "***", "***");
    List<Serie> series = await _client.QueryAsync("dbName", "SELECT T_PV FROM TFA WHERE time >= '2019-05-21' and time < '2019-05-22'");            

    return series;
}

IActionResult，我将数据传递给模型：

public IActionResult Index()
{
     DashboardViewModel DatosParaMostrar = new DashboardViewModel();

     DatosParaMostrar.time = ConsultaBD().Result[0].Values[0][0].ToString();
     DatosParaMostrar.valor = ConsultaBD().Result[0].Values[0][1].ToString();

     return View(DatosParaMostrar);
}

返回的数据“ QueryBD（）。Result [0] .Values”是这样的对象：

data->
       [0]->
             [0]= {21/05/2019 0:00:03}
             [1]= 586.5
       [1]->
             [0]= {21/05/2019 0:00:03}
             [1]= 575.4
       [2]->
             [0]= {21/05/2019 0:00:03}
             [1]= 595.5
       [3]->
             [0]= {21/05/2019 0:00:03}
             [1]= 584.25
       [4]->
             [0]= {21/05/2019 0:00:03}
             [1]= 583.625
       .......

使用此代码，我仅传递第一个数据，如何传递对象具有的所有数据？

Answer 1

您应该await致电ConsultaBD：

public async Task<IActionResult> Index()
{
    DashboardViewModel DatosParaMostrar = new DashboardViewModel();

    var result = (await ConsultaBD()).First();
    DatosParaMostrar.time = result.Values[0][0].ToString();
    DatosParaMostrar.valor = result.Values[0][1].ToString();

    return View(DatosParaMostrar);
}

如果要显示所有检索到的数据，不仅要显示第一个数据，还应该填充DashboardViewModel的列表并将其传递给视图：

public async Task<IActionResult> Index()
{        
    var results = await ConsultaBD();
    IList<DashboardViewModel> model = results.Select(x => new DashboardViewModel {
         time = x.Values[0][0].ToString(),
         valor = x.Values[0][1].ToString()
    }).ToList();        

    return View(model);
}

Answer 2

型号：

-E

IActionResult：

$: sed -Ei 's/,\s+/,/' file.csv
$: cat file.csv
[2,4,5,6,2,34,61,32,34,54,34,22]     0.144354
[3,4,6,4,5,6,7,1,2,3,4,53,23,34]     0.332453
[2,43,6,2,1,2,5,8,9,0,8,6,34,21]     0.347643

在您的public class DashboardViewModel { public string time { get; set; } public string valor { get; set; } public List<DashboardViewModel> lstDashboardviewModel {get; set; } }中迭代public IActionResult Index() { DashboardViewModel DatosParaMostrar = new DashboardViewModel(); foreach(var data in ConsultaBD().Result){ DatosParaMostrar.time = data.Values[0].ToString(); DatosParaMostrar.valor = data.Values[1].ToString(); DatosParaMostrar.lstDatosParaMostrar.Add(DatosParaMostrar); } return View(DatosParaMostrar); }中的列表并进行相应的绑定。

如何将对象传递给C＃模型的变量

2 个答案: