将WCF服务的查询结果设置为MVC3控制器

Question

我这里有个情况。 我正在使用MVC3网络应用程序。 我编写了一个与DB通信的WCF Web服务。 在一个视图中，我试图显示学生表中的所有记录。

这是StudentContorller的代码，我在其中调用Web服务以获取所有学生记录：

ServiceStudentClient client = new ServiceStudentClient();
client.GetAllStudents(); //What should be the return type??
return View(students.ToList()); //something like this??

这是StudentService中函数的定义：

public void GetAllStudents()
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["StudentCon"].ConnectionString);
        SqlCommand cmd = new SqlCommand();
        cmd.CommandText = "select * from Student";
        cmd.Connection = con;
        con.Open();
        SqlDataReader studentReader = cmd.ExecuteReader();
        con.Close();

        //Need to write code here to return students
    }

这是学生视图students.chtml ：

@model IEnumerable<StudentRegistrationPortal.Models.StudentModel>

@{
    ViewBag.Title = "All Students";
}

<h2>Index</h2>

<p>
   @Html.ActionLink("Add New Student", "Create")
</p>
<table>
<tr>
    <th>
        RollNumber
    </th>
    <th>
        Password
    </th>
    <th>
        Name
    </th>
    <th>
        Email
    </th>
    <th>
        Balance
    </th>
    <th></th>
</tr>

@foreach (var item in Model) {
<tr>
    <td>
        @Html.DisplayFor(modelItem => item.RollNumber)
    </td>
    <td>
        @Html.DisplayFor(modelItem => item.Password)
    </td>
    <td>
        @Html.DisplayFor(modelItem => item.Name)
    </td>
    <td>
        @Html.DisplayFor(modelItem => item.Email)
    </td>
    <td>
        @Html.DisplayFor(modelItem => item.Balance)
    </td>
    <td>
        @Html.ActionLink("Edit", "Edit", new { id=item.SId }) |
        @Html.ActionLink("Details", "Details", new { id=item.SId }) |
        @Html.ActionLink("Delete", "Delete", new { id=item.SId })
    </td>
</tr>
}

</table>

所以我很困惑，我应该从哪种dataType接收来自服务的学生记录，以及我将如何以列表的形式返回这些记录，以便学生视图可以处理它们。 我不想更改视图代码。 请帮忙。

Answer 1

一种方法是在服务中创建一个Student类。 说ServiceStudent 。

public class ServiceStudent
{
     //your student properties...
}

然后从您的方法： GetAllStudents() ，您可以填充List。

public List<ServiceStudent> GetAllStudents()
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["StudentCon"].ConnectionString);
        SqlCommand cmd = new SqlCommand();
        cmd.CommandText = "select * from Student";
        cmd.Connection = con;
        con.Open();
        SqlDataReader studentReader = cmd.ExecuteReader();

        //Fill List of ServiceStudent from reader...

        con.Close();
   }

然后在客户端：

ServiceStudentClient client = new ServiceStudentClient();
List<Service.ServiceStudent> serviceList = client.GetAllStudents();    

//Now you need to map your ServiceStudent to ModelStudent here

List<ModelStudent> modelList = new List<ModelStudent>();

foreach(var serviceStudent in serviceList)
{
     ModelStudent model = new ModelStudent();
     model.property = serviceStudent.property;
     //Etc etc
     modelList.Add(model);
}
//Note : This is just rough code, For mapping you should use Mapper or write your custom method for mapping...

return View(modelList ); //pass Model Student here...

希望对您有所帮助。