Question

我正在尝试在视图中获取模型并将其传递给另一个控制器，但模型在传递给另一个控制器时为null。

控制器 - 在这里，我将模型发送到我的视图中呈现：

   [HttpPost]
    public PartialViewResult Index(ReportesTabularesViewModel ModeloInput)
    {
        GetDatosTabularReportInput input = new GetDatosTabularReportInput { IdSensor = ModeloInput.sensor, FechaInicio = ModeloInput.FechaInicio, FechaFinal = ModeloInput.FechaFinal };
        ReportesTabularesViewModel Modelo = new ReportesTabularesViewModel();
        var Lista = new CaelusReporting.Datos.DatosApp().GetDatosTabularReport(input);

        var s = Modelo.Sensores;

        ViewBag.Sensores = s;
        Modelo.Datos = Lista.GroupBy(x => x.Fecha).Select(y => new DatosViewModel
        {
            Fecha = y.Key,
            EstacionSensorSensorNombre = y.First().EstacionSensorSensorNombre,
            Datos = y
        }
            );

        ViewBag.Modelo = ModeloInput;
        return PartialView(Modelo);
    }

查看：

@model CaelusReporting.Web.Models.ViewModels.Datos.ReportesTabularesViewModel
@{
    ViewData["temp"] = ViewBag.Modelo;   
    ViewBag.Title = Model.Datos.Select(y => y.EstacionSensorSensorNombre).FirstOrDefault();
    List<CaelusReporting.Sensores.Dto.SensoresDto> sensores = ViewBag.Sensores;
}


<a class="menu-bar" data-toggle="collapse" href="#menu">
    <span class="bars"></span>
</a>
<div class="collapse menu" id="menu">
    <div class="list-inline">
        @using (Ajax.BeginForm("Index", new AjaxOptions { UpdateTargetId = "Update", HttpMethod = "POST", InsertionMode = InsertionMode.Replace }))
        {

            <label>Sensor: </label>
            <select data-placeholder="Escoja las estaciones" class="chosen-select-width" tabindex="8" name="sensor">
                @foreach (var item in sensores.Where(x => x.estado == true))
                {
                    <option value=@item.Id>@item.nombre</option>
                }
            </select>
            <label>Fecha de Inicio: </label>
            @Html.TextBoxFor(m => m.FechaInicio, null, new { type = "datetime-local", style = "max-width:235px; max-height:20px" })
            <label>Fecha de Final: </label>
            @Html.TextBoxFor(m => m.FechaFinal, null, new { type = "datetime-local", style = "max-width:235px; max-height:20px" })

            <input id="Submit1" type="submit" value="Ver" />

        }

        <a href="@Url.Action("ExportReport", "Reportes", new { DocType = "PDF" })"> Get Report in PDF</a>
        <a href="@Url.Action("ExportReport", "Reportes", new { DocType = "XLS" })"> Get Report in XLS</a>
        <a href="@Url.Action("ExportReport", "Reportes", new { DocType = "DOC" })"> Get Report in DOC</a>
        <a href="@Url.Action("ExportReport", "Reportes", new { DocType = "CSV" })"> Get Report in CSV</a>
       
       
    </div>
</div>

另一个控制器 - 在这里我尝试导入位于以下位置的报告：

  public ActionResult ExportReport(string DocType)
    {
        ReportesTabularesViewModel test = ViewData["temp"] as ReportesTabularesViewModel;

        GetDatosTabularReportInput input = new GetDatosTabularReportInput { IdSensor = test.sensor, FechaInicio = test.FechaInicio, FechaFinal = test.FechaFinal };

        var Lista = new CaelusReporting.Datos.DatosApp().GetDatosTabularReport(input);
        ReportDocument rd = new ReportDocument();
        rd.Load(Path.Combine(Server.MapPath("~/Reportess"), "Reporte.rpt"));
        rd.SetDataSource(Lista);
        Response.Buffer = false;
        Response.ClearContent();
        Response.ClearHeaders();

        switch (DocType)
        {
            case "PDF":
                rd.Load(Path.Combine(Server.MapPath("~/Reportess"), "Reporte.rpt"));
                try
                {
                    Stream stream = rd.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);
                    stream.Seek(0, SeekOrigin.Begin);
                    return File(stream, "application/pdf", "ReportePDF.pdf");
                }
                catch (Exception ex)
                {
                    throw;
                }
            case "DOC":
                rd.Load(Path.Combine(Server.MapPath("~/Reportess"), "Reporte.rpt"));
                try
                {
                    Stream stream = rd.ExportToStream(CrystalDecisions.Shared.ExportFormatType.WordForWindows);
                    stream.Seek(0, SeekOrigin.Begin);
                    return File(stream, "application/msword", "ReporteDOC.doc");
                }
                catch (Exception ex)
                {
                    throw;
                }
            case "XLS":
                rd.Load(Path.Combine(Server.MapPath("~/Reportess"), "Reporte.rpt"));
                try
                {
                    Stream stream = rd.ExportToStream(CrystalDecisions.Shared.ExportFormatType.Excel);
                    stream.Seek(0, SeekOrigin.Begin);
                    return File(stream, "application/vnd.ms-excel", "ReporteDOC.xls");
                }
                catch (Exception ex)
                {
                    throw;
                }
            case "CSV" :
                 rd.Load(Path.Combine(Server.MapPath("~/Reportess"), ""));
                try
                {
                    Stream stream = rd.ExportToStream(CrystalDecisions.Shared.ExportFormatType.CharacterSeparatedValues);
                    stream.Seek(0, SeekOrigin.Begin);
                    return File(stream, "text/csv", "ReporteCSV.csv");
                }
                catch (Exception ex)
                {
                    throw;
                }
            default:
                return null;
        }
    }

Answer 1

您无法在请求（操作）之间传递ViewData。例如，您需要在查询中以某种方式序列化数据。您可以使用RouteValueDictionary执行此操作。

你需要像这样创建行动模型ActionResult ExportReport(string DocType)：

public class ExportReportModel
{
    public string DocType {get; set;}
    // all fields which you required from ReportesTabularesViewModel
}

然后您的操作将显示为此ActionResult ExportReport(ExportReportModel model)，您可以呈现此类链接：

<a href="@Url.Action("ExportReport", "Reportes", new RouteValueDictionary(new ReportesTabularesViewModel{/*initialize object*/}))">Get  Report in PDF</a>

您也可以使用匿名对象，但如果您有超过3个参数，我将以某种结构组织这些对象。

如何使用ActionLink返回模型？

1 个答案: