Question

我有一个情况。我正在使用MVC3网络应用程序。我写了一个与DB通信的WCF Web服务。在视图中，我试图显示学生表中的所有记录。

以下是StudentContorller的代码，我拨打网络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??

以下是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
    }

以下是学生观点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，我应该从服务中接收学生记录的数据类型以及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

这样做的一种方法是在您的服务中创建一个Student类。说ServiceStudent。

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

然后从你的方法：GetAllStudents()，你可以填写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...

我希望它会有所帮助。

将查询结果从WCF服务设置为MVC3控制器

1 个答案: