如何在ViewBag中传递变量列表

Question

I am working on a project I just need to grab data from two tables and I want to use LINQ Query to fetch data.

Inside my Controller:

var Parameters = (from test in _db.tblAddTests
               join par in _db.tblParameters on test.AddTestId equals 
               par.TestId
               where par.ParameterDatatype == 3
               select new
               {
                ParameterId = par.ParameterId, 
                ParameterName = par.ParameterName,
                TestName = test.TestName
                }
            ).ToList();
ViewBag.Parameters = Parameters;

And I want to use this Parameters in my razor as:

@foreach (var item in ViewBag.Parameters)
{
    <option value="@item.ParameterId">@item.ParameterName - @item.TestName</option>
}

It is currently giving me error that object as no definition for ParameterId. Although I have tried debugging and item is getting values as well but I am not sure how to display them,

Here is screen shot of values I am getting Values in item variable:

Also Here is Screen shot of the error:

Answer 1

You are using an anonymous type. It wouldn't work in this case. Either use a known type or dynamic. ie:

var Parameters = (from test in _db.tblAddTests
               join par in _db.tblParameters on test.AddTestId equals 
               par.TestId
               where par.ParameterDatatype == 3
               select new ParamsClass
               {
                ParameterId = par.ParameterId, 
                ParameterName = par.ParameterName,
                TestName = test.TestName
                }
            ).ToList();
ViewBag.Parameters = Parameters;

public class ParamsClass
{
  public int ParameterId {get; set;}
  public string ParameterName {get; set;}  
  public string TestName {get; set;}
}

In view:

@foreach (ParamsClass item in ViewBag.Parameters)
{
    <option value="@item.ParameterId">@item.ParameterName - @item.TestName</option>
}

Answer 2

You can make a new class in your controller:

public class Params
{
public int ParameterId {get; set;}
public string ParameterName {get; set;}  
public string TestName {get; set;}
}

In View You can use it like this

@{
var items = (Params)ViewBag.Parameters;
}
@foreach(var item in items){
your code for html....
}

Answer 3

{
public int ID{get; set;}
public string Name{get; set;}  
}

Use this syntax in your CSHTML:

@{
var items = (Params)ViewBag.Parameters;
}
@foreach(var item in items){
//body
}