如何将HashSet用作DataGridView中的数据源（使用INotifyPropertyChanged）C＃ [英] How to use HashSet as DataSource in DataGridView (using INotifyPropertyChanged) C#

问题描述

我试图用 HashSet 中的 DataGridView witd数据实现数据绑定。
我已经在这样的模型类中实现了INotifyPropertyChanged接口（我在stackoverflow上找到了这个解决方案），但是它仍然不会更改数据网格视图而不重置数据源。

I am trying to implement data binding with in DataGridView witd data in HashSet. I have implemented INotifyPropertyChanged interface in my model class like this ( I hava found this solution here on stackoverflow), but it still doesn't change the data grid view without reseting data source.

我的模型类

 class BookModel : INotifyPropertyChanged
    {
        private string name;
        private uint year;
        private uint pagesCount;
        private string series;
        private string publisher;
        private string author;
        private string language;
        [DisplayName("Book Name")]
        public string Name {
            get { return name; }
            set { SetField(ref name, value, "Name"); }
        }
        [DisplayName("Book Year")]
        public uint Year {
            get { return year; }
            set { SetField(ref year, value, "Year"); }
        }
        [DisplayName("Book Series")]
        public string Series {
            get { return series; }
            set { SetField(ref series, value, "Series"); }
        }
        [DisplayName("Book Pulbisher")]
        public string Pulbisher {
            get { return publisher; }
            set { SetField(ref publisher, value, "Pulbisher"); }
        }
        [DisplayName("Book Author")]
        public string Author {
            get { return author; }
            set { SetField(ref author, value, "Author"); }
        }
        [DisplayName("Book Language")]
        public string Language {
            get { return language; }
            set { SetField(ref language, value, "Language"); }
        }
        [DisplayName("Book Pages Count")]
        public uint PagesCount {
            get { return pagesCount; }
            set { SetField(ref pagesCount, value, "PagesCount"); }
        }

        public event PropertyChangedEventHandler PropertyChanged;
        protected virtual void OnPropertyChanged(string propertyName)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
        }
        protected bool SetField<T>(ref T field, T value, string propertyName)
        {
            if (EqualityComparer<T>.Default.Equals(field, value)) return false;
            field = value;
            OnPropertyChanged(propertyName);
            return true;
        }
    }

创建表单时，我会这样做

When creating form I do

        bookContainer = new HashSet<BookModel>();
        dataGridViewBookList.DataSource = bookContainer.ToList();

然后单击按钮

            // Creating new book from user input
            bookContainer.Add(newBook);

但这仅在

            bookContainer.Add(newBook);
            dataGridViewBookList.DataSource = bookContainer.ToList();

这似乎是一种肮脏的解决方案，并且INotifyPropertyChanged在这种情况下不受影响。

It seems like a kind of "dirty solution" and INotifyPropertyChanged doesn't affect in this case.

请提出如何正确实现对HashSet的数据绑定，以便在集合中的数据发生更改（添加，删除，修改）时通知gridview。

Please suggest how to implement databinding to HashSet properly to notify gridview when data changed in collection (added,removed, modified).

推荐答案

选项1 -考虑使用绑定列表

选项2 -考虑改用此类 HashSet ：

using System.Collections; 
using System.Collections.Generic; 
using System.Collections.ObjectModel; 
using System.ComponentModel; 
using System.Diagnostics.CodeAnalysis; 
using System.Data.Entity; 

namespace WinFormswithEFSample 
{ 
    public class ObservableListSource<T> : ObservableCollection<T>, IListSource 
        where T : class 
    { 
        private IBindingList _bindingList; 

        bool IListSource.ContainsListCollection { get { return false; } } 

        IList IListSource.GetList() 
        { 
            return _bindingList ?? (_bindingList = this.ToBindingList()); 
        } 
    } 
}

这样您也可以执行主从数据绑定。假设您有一个Category类，其中的 List< Product> 作为子类，则可以通过更改 List<使其适用于主从数据绑定。 Product> 到 ObservableListSource< Product> 。

This way you can also perform Master-Detail data binding. Suppose you have a Category class that has a List<Product> as childs, then you can make it work for Master-Detail databinding by changing List<Product> to ObservableListSource<Product>.

更多信息：使用WinForms进行数据绑定

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