绑定泛型集合列表<>到属性网格

Question

我尝试泛型集合listContact结合propGrid但产量不符合我的预期。我想要listContact将显示为列表框在propGrid。我该怎么做？谢谢。

class Contact 
{ 
    public string Name { get; set; } 
    public string Address { get; set; } 
} 

PropertyGrid propGrid = new PropertyGrid(); 
List<Contact> listContact = new List<Contact>(); 

private void Form1_Load(object sender, EventArgs e) 
{ 
    listContact.Clear(); 
    Contact newContact = null; 

    newContact = new Contact(); 
    newContact.Name = "diana"; 
    newContact.Address = "en"; 
    listContact.Add(newContact); 

    newContact = null; 
    newContact = new Contact(); 
    newContact.Name = "maxim"; 
    newContact.Address = "cand"; 
    listContact.Add(newContact); 

    propGrid.SelectedObject = listContact; 
    this.Controls.Add(propGrid); 
    propGrid.Dock = DockStyle.Fill; 

} 

Answer 1

您必须延长您的课程才能使用ExpandableObjectConverter。这使得可解析发生。

请参阅下面的代码。只是一个下跌的例子。选择你最喜欢的一个。 用于编码的源代码：MSDN

[TypeConverter(typeof(Contact))] 
[DescriptionAttribute("Expand to see the spelling options for the application.")] 
class Contact : ExpandableObjectConverter 
{ 
    [DefaultValueAttribute("Contact Name")] 
    public string Name { get; set; } 
    public string Address { get; set; } 

    public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) 
    { 
     if (destinationType == typeof(Contact)) 
     { 
      return true; 
     } 
     return base.CanConvertTo(context, destinationType); 
    } 

    public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType) 
    { 
     if (destinationType == typeof(System.String) && value is Contact) 
     { 
      Contact contact = value as Contact; 

      return string.Format("Name: {0} - Address: {1}", contact.Name, contact.Address); 
     } 
     return base.ConvertTo(context, culture, value, destinationType); 
    } 
} 

[TypeConverter(typeof(Contact2))] 
[DescriptionAttribute("Expand to see the spelling options for the application.")] 
class Contact2 : ExpandableObjectConverter 
{ 
    private Contact contato1; 
    public Contact Contato1 
    { 
     get 
     { 
      return contato1; 
     } 
     set 
     { 
      contato1 = value; 
     } 
    } 

    private Contact contato3; 
    public Contact Contato3 
    { 
     get 
     { 
      return contato3; 
     } 
     set 
     { 
      contato3 = value; 
     } 
    } 

    public Contact2() 
    { 
     this.contato1 = new Contact() 
     { 
      Address = "Add1", 
      Name = "Name1" 
     }; 
     this.contato3 = new Contact() 
     { 
      Address = "Add3", 
      Name = "Name3" 
     }; 
    } 
} 

public partial class Form2 : Form 
{ 
    PropertiesList<Contact> listContact = new PropertiesList<Contact>(); 
    //List<Contact> listContact = new List<Contact>(); 

    public Form2() 
    { 
     InitializeComponent(); 
    } 

    private void Form2_Load(object sender, EventArgs e) 
    { 
     listContact.Clear(); 
     Contact newContact = null; 

     newContact = new Contact(); 
     newContact.Name = "diana"; 
     newContact.Address = "en"; 
     listContact.Add(newContact); 

     newContact = null; 
     newContact = new Contact(); 
     newContact.Name = "maxim"; 
     newContact.Address = "cand"; 
     listContact.Add(newContact); 

     propGrid.AllowDrop = true; 

     object[] itens = new object[2]; 
     itens[0] = listContact; 
     itens[1] = newContact; 
     propGrid.SelectedObject = listContact; 
     this.Controls.Add(propGrid); 
     propGrid.Dock = DockStyle.Fill; 
    } 
} 

[TypeConverter(typeof(Contact))] 
class PropertiesList<T> : ExpandableObjectConverter where T : Contact 
{ 
    private List<T> innerList = new List<T>(); 

    public List<string> Names 
    { 
     get 
     { 
      List<string> valuesReturned = null; 
      if (innerList.Count > 0) 
      { 
       valuesReturned = new List<string>(); 
       for (int i = 0; i < innerList.Count; i++) 
       { 
        valuesReturned.Add(innerList[i].Name); 
       } 

      } 
      return valuesReturned; 
     } 
    } 

    public List<T> Item 
    { 
     get 
     { 
      List<T> valuesReturned = null; 
      if (innerList.Count > 0) 
      { 
       valuesReturned = new List<T>(); 
       for (int i = 0; i < innerList.Count; i++) 
       { 
        valuesReturned.Add(innerList[i]); 
       } 

      } 
      return valuesReturned; 
     } 
    } 

    public Color GetColors { get; set; } 

    public Contact2 Contato22 
    { 
     get 
     { 
      return new Contact2(); 
     } 
    } 

    public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) 
    { 
     if (destinationType == typeof(Contact)) 
     { 
      return true; 
     } 
     return base.CanConvertTo(context, destinationType); 
    } 

    public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType) 
    { 
     if (destinationType == typeof(System.String) && value is Contact) 
     { 
      Contact contact = value as Contact; 

      return string.Format("Name: {0} - Address: {1}", contact.Name, contact.Address); 
     } 
     return base.ConvertTo(context, culture, value, destinationType); 
    } 

    #region Simulate List 
    public void Add(T item) 
    { 
     innerList.Add(item); 
    } 

    public void Clear() 
    { 
     innerList.Clear(); 
    } 
    #endregion 
}