将实体对象绑定到具有DisplayMember的多个字段的Lis​​tBox

Question

我正在使用Entity Framework 6来建模数据库中的客户端列表。我将集合成功绑定到列表框。我无法弄清楚如何使用对象中的多个字段绑定到Windows窗体ListBox的DisplayMember属性。

这有效......

myLsiTBox.DataSource = context.Clients.ToList();
myLsiTBox.DisplayMember = "CompanyName";
myLsiTBox.ValueMember = "id";

这失败了......

myLsiTBox.DataSource = context.Clients.ToList();
myLsiTBox.DisplayMember = "CompanyName" + "-" + "LastName" + " - " + "FirstName";
myLsiTBox.ValueMember = "id";

如何显示ListBox中多个字段的内容？

Answer 1

如果这是您的客户：

public class Client
{
    public string CompanyName { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
}

您可以创建ClientViewModel，然后将列表框数据源绑定到ClientViewModel列表，并将DisplayMember设置为“FullDetails”。

public class ClientViewModel
{
    public string CompanyName { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string FullDetails { get { return string.Format("{0}-{1} - {2}", this.CompanyName, this.LastName, this.FirstName)} }

    public ClientViewModel(Client c)
    {
        this.CompanyName = c.CompanyName;
        this.FirstName = c.FirstName;
        this.LastName = c.LastName;
    }
}

..或者只是将FullDetails属性添加到orignal Client类中。

Answer 2

myLsiTBox.DataSource = context.Clients.select(a=>new {

  ID=a.id;
  Title=a.CompanyName + "-" + a.LastName + " - " + a.FirstName;

}).ToList();

myLsiTBox.DisplayMember = "Title";
myLsiTBox.ValueMember = "ID";