Question

我在WinForm中找到了数据绑定：

       BindingSource bs = new BindingSource();
       test t = new test ();
       t.Foo = "Ahmet";
       bs.DataSource = t;
       label1.DataBindings.Add(new Binding("Text", bs, "Foo", false, DataSourceUpdateMode.OnPropertyChanged));

这有效，但我需要更复杂的数据绑定。我有区，桌子课。我从db获取数据并创建List对象。所有区域都有许多办公桌。

我尝试过但是它没有用.Button Text为null。我如何使用数据绑定？

BindingSource bs = new BindingSource();

foreach (Area area in areaList)
            {
                Button btn = new Button();
                btn.AutoSize = false;
                btn.Width = 100;
                btn.BringToFront();
                btn.Height = 35;
                btn.Font= new Font("Arial", 16, FontStyle.Bold);
                btn.BackColor = Color.White;
                btn.FlatStyle = FlatStyle.Flat;
                btn.TextAlign = ContentAlignment.MiddleCenter;
                btn.Margin = new Padding(3,5,3,5);
                btn.DataBindings.Add(new Binding("Text", bs,"Name",false, DataSourceUpdateMode.OnPropertyChanged));
                btn.Click += new EventHandler(btnAreaClick);

                fpnlAreas.Controls.Add(btn);
            }

区域类

public class Area : INotifyPropertyChanged
    {
        private string _id;
        private string _name;
        private List<Table> _table;

        public event PropertyChangedEventHandler PropertyChanged;

        public List<Table> ListOfTable
        {
            get { return _table; }
            set { _table = value;
                OnPropertyChanged("ListOfTable");
            }
        }




        public string Name
        {
            get { return _name; }
            set { _name = value;
                OnPropertyChanged("Name");
            }
        }


        public string Id
        {
            get { return _id; }
            set { _id = value;
                OnPropertyChanged("Id");
            }
        }

        public Area()
        {
            ListOfTable = new List<Entity.Table>();
        }

        protected virtual void OnPropertyChanged(string Property)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(Property));
            }
        }

    }

桌面课程

public class Table
    {
        private string _id;
        private string _name;


        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }

        public string Id
        {
            get { return _id; }
            set { _id = value; }
        }

        public Table()
        {
            ListOfBill = new List<Bill>();
        }

    }

Answer 1

您的绑定不起作用，因为您没有设置BindingSource的数据源。

调整代码为每个Area创建一个BindingSource并使用它，如下所示：

foreach (Area area in areaList)
{
    BindingSource bs = new BindingSource();
    bs.DataSource = area;

    Button btn = new Button();
    btn.AutoSize = false;
    btn.Width = 100;
    btn.BringToFront();
    btn.Height = 35;
    btn.Font= new Font("Arial", 16, FontStyle.Bold);
    btn.BackColor = Color.White;
    btn.FlatStyle = FlatStyle.Flat;
    btn.TextAlign = ContentAlignment.MiddleCenter;
    btn.Margin = new Padding(3,5,3,5);
    btn.DataBindings.Add(new Binding("Text", bs,"Name",false, DataSourceUpdateMode.OnPropertyChanged));
    btn.Click += new EventHandler(btnAreaClick);

    fpnlAreas.Controls.Add(btn);
}

C＃Windows窗体数据绑定

1 个答案: