Question

模型::::

 public class Model1

    {

        public string Name { get; set; }

        public string ProductName { get; set; }

    }

视图模型::::

public class ViewModel1

    {

      public  List<Model1> model1;

    }

controller :::::::::

var sent = entities.Table1.Where<Table1>(o => o.SenderUserId == userId );

          ViewModel1 newViewModel = new ViewModel1();

            foreach (Table1 gf in sent)

            {

                var nmodel = new Model1();

                nmodel.Name = gf.Name;

                nmodel.ProductName = doSomething(gf.ProductName);

               // **Here I'm stuck====how do I add nmodel to newViewModel**

               //**newViewModel.Add===does not work**

            }

          return View(newViewModel);

Answer 1

根据您发布的代码进行快速猜测，您从未实例化过该集合。

public class ViewModel1
{
    List<Model1> model1;
    public ViewModel1()
    {
        model1=new List<Model1>();
    }
}
......
newViewModel.model1.Add(nmodel);

Answer 2

按如下方式更改ViewModel 视图模型::::

public class ViewModel1
{
    public  List<Model1> model1 = new List<Model1>();
}

按如下方式更改您的控制器：

var sent = entities.Table1.Where<Table1>(o => o.SenderUserId == userId );
ViewModel1 newViewModel = new ViewModel1();
foreach (Table1 gf in sent)
{
        var nmodel = new Model1();
        nmodel.Name = gf.Name;
        nmodel.ProductName = doSomething(gf.ProductName);
        newViewModel.model1.Add(nmodel);
}

return View(newViewModel);

在mvc2控制器中创建自定义对象列表

2 个答案: