我搜索了2个小时以上,找不到答案.所以我试试这里：
我想知道如何(如果可以完成)我可以将模型列表数据绑定到WinForms ComboBox,并使用模型的属性的属性(在列表中的属性)作为DisplayMember？见代码：
public partial class Form1 : Form
{
private List<UserDataModel> userData = new List<UserDataModel>();
public Form1()
{
InitializeComponent();
MyInit();
}
public void MyInit()
{
var userDataModel1 = new UserDataModel();
userDataModel1.Name = "Mike";
userDataModel1.Phone = "555-666";
userDataModel1.Home = new HomeDataModel();
userDataModel1.Home.StreetName = "MikeStreet";
userDataModel1.Home.GeoLocationX = 111;
userDataModel1.Home.GeoLocationY = 222;
var userDataModel2 = new UserDataModel();
userDataModel2.Name = "Jonathan";
userDataModel2.Phone = "777-888";
userDataModel2.Home = new HomeDataModel();
userDataModel2.Home.StreetName = "JonathanStreet";
userDataModel2.Home.GeoLocationX = 333;
userDataModel2.Home.GeoLocationY = 444;
userData.Add(userDataModel1);
userData.Add(userDataModel2);
// This works as usually:
/*
comboBox1.DisplayMember = "Name";
comboBox1.ValueMember = "Home";
comboBox1.DataSource = userData;
*/
// But this works not (either with comboBox1.DataBindings.Add() nor with BindingSource):
comboBox1.DisplayMember = "Home.StreetName";
comboBox1.ValueMember = "Home";
comboBox1.DataSource = userData;
// To drive me crazy,THAT shit works:
textBox1.DataBindings.Add("Text",userData,"Home.StreetName");
/*
So how can i use a String-Property of a SubObject as ComboBox-DisplayMember ???
BTW: To rebuild the sample,you only need a normal Forms Application and
then drop a ComboBox and a TextBox on it. Copy that code here,and run it.
*/
}
}
internal sealed class UserDataModel
{
public string Name { get; set; }
public string Phone { get; set; }
public HomeDataModel Home { get; set; }
}
internal sealed class HomeDataModel
{
public string StreetName { get; set; }
public int GeoLocationX { get; set; }
public int GeoLocationY { get; set; }
}
解决方法
刚刚添加到你的代码一个方法(事实上),它的工作.
public partial class Form1 : Form
{
private List<UserDataModel> userData = new List<UserDataModel>();
public Form1()
{
InitializeComponent();
MyInit();
}
public void MyInit()
{
var userDataModel1 = new UserDataModel();
userDataModel1.Name = "Mike";
userDataModel1.Phone = "555-666";
userDataModel1.Home = new HomeDataModel();
userDataModel1.Home.StreetName = "MikeStreet";
userDataModel1.Home.GeoLocationX = 111;
userDataModel1.Home.GeoLocationY = 222;
var userDataModel2 = new UserDataModel();
userDataModel2.Name = "Jonathan";
userDataModel2.Phone = "777-888";
userDataModel2.Home = new HomeDataModel();
userDataModel2.Home.StreetName = "JonathanStreet";
userDataModel2.Home.GeoLocationX = 333;
userDataModel2.Home.GeoLocationY = 444;
userData.Add(userDataModel1);
userData.Add(userDataModel2);
// This works as usually:
/*
comboBox1.DisplayMember = "Name";
comboBox1.ValueMember = "Home";
comboBox1.DataSource = userData;
*/
// But this works not (either with comboBox1.DataBindings.Add() nor with BindingSource):
comboBox1.DisplayMember = "Home.StreetName";
comboBox1.ValueMember = "Home";
comboBox1.DataSource = userData;
// To drive me crazy,and run it.
*/
}
// To add this method - follow to my instructions below
private void ComboBoxFormat(object sender,ListControlConvertEventArgs e)
{
e.Value = ((UserDataModel)e.ListItem).Home.StreetName;
}
}
internal sealed class UserDataModel
{
public string Name { get; set; }
public string Phone { get; set; }
public HomeDataModel Home { get; set; }
}
internal sealed class HomeDataModel
{
public string StreetName { get; set; }
public int GeoLocationX { get; set; }
public int GeoLocationY { get; set; }
}
要创建此方法(事件),请以[设计]模式转到表单,右键单击ComboBox – >属性.
在属性窗口的顶部,单击事件(闪电图标),
在下面的事件列表中查找格式(在“更改的属性”下),并键入一些事件名称,如下所示：ComboBoxFormat,然后按Enter键.而已 原文链接：https://www.f2er.com/csharp/95047.html
