如何对数据绑定DataGridView列进行排序？

我知道这个话题有很多问题。 我经历了所有这些，但似乎没有任何帮助。

如何通过单击列标题进行排序？

我应该如何修改此代码来完成这项工作？

public partial class Form1 : Form { public Form1() { List list = new List(); list.Add(new MyClass("Peter", 1202)); list.Add(new MyClass("James", 292)); list.Add(new MyClass("Bond", 23)); BindingSource bs = new BindingSource(); bs.DataSource = list; DataGridView dg = new DataGridView(); DataGridViewTextBoxColumn c = new DataGridViewTextBoxColumn(); c.Name = "name"; c.DataPropertyName = "Name"; dg.Columns.Add(c); c = new DataGridViewTextBoxColumn(); c.Name = "number"; c.DataPropertyName = "Number"; dg.Columns.Add(c); dg.DataSource = bs; this.Controls.Add((Control)dg); } } class MyClass:IComparable { public string Name { get; set; } public int Number { get; set; } public MyClass(){} public MyClass(string name,int number) { Name = name; Number = number; } public override string ToString() { return string.Format("{0}:{1}",Name,Number); } #region IComparable Members public int CompareTo(MyClass other) { return Name.CompareTo(other.Name); } #endregion } 

Answer 1

我记得在我添加排序到我的数据网格时找到一些可行的问题。 您可以通过首先将以下类添加到项目中来实现可排序的可绑定列表。 它是一个实现BindingList的列表实现，因此您可以将datagrid绑定到它，并且它还支持排序。 我可以在MSDN上更详细地解释细节

 public class SortableBindingList : BindingList { private ArrayList sortedList; private ArrayList unsortedItems; private bool isSortedValue; public SortableBindingList() { } public SortableBindingList(IList list) { foreach (object o in list) { this.Add((T)o); } } protected override bool SupportsSearchingCore { get { return true; } } protected override int FindCore(PropertyDescriptor prop, object key) { PropertyInfo propInfo = typeof(T).GetProperty(prop.Name); T item; if (key != null) { for (int i = 0; i < Count; ++i) { item = (T)Items[i]; if (propInfo.GetValue(item, null).Equals(key)) return i; } } return -1; } public int Find(string property, object key) { PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T)); PropertyDescriptor prop = properties.Find(property, true); if (prop == null) return -1; else return FindCore(prop, key); } protected override bool SupportsSortingCore { get { return true; } } protected override bool IsSortedCore { get { return isSortedValue; } } ListSortDirection sortDirectionValue; PropertyDescriptor sortPropertyValue; protected override void ApplySortCore(PropertyDescriptor prop, ListSortDirection direction) { sortedList = new ArrayList(); Type interfaceType = prop.PropertyType.GetInterface("IComparable"); if (interfaceType == null && prop.PropertyType.IsValueType) { Type underlyingType = Nullable.GetUnderlyingType(prop.PropertyType); if (underlyingType != null) { interfaceType = underlyingType.GetInterface("IComparable"); } } if (interfaceType != null) { sortPropertyValue = prop; sortDirectionValue = direction; IEnumerable query = base.Items; if (direction == ListSortDirection.Ascending) { query = query.OrderBy(i => prop.GetValue(i)); } else { query = query.OrderByDescending(i => prop.GetValue(i)); } int newIndex = 0; foreach (object item in query) { this.Items[newIndex] = (T)item; newIndex++; } isSortedValue = true; this.OnListChanged(new ListChangedEventArgs(ListChangedType.Reset, -1)); } else { throw new NotSupportedException("Cannot sort by " + prop.Name + ". This" + prop.PropertyType.ToString() + " does not implement IComparable"); } } protected override void RemoveSortCore() { int position; object temp; if (unsortedItems != null) { for (int i = 0; i < unsortedItems.Count; ) { position = this.Find("LastName", unsortedItems[i].GetType(). GetProperty("LastName").GetValue(unsortedItems[i], null)); if (position > 0 && position != i) { temp = this[i]; this[i] = this[position]; this[position] = (T)temp; i++; } else if (position == i) i++; else unsortedItems.RemoveAt(i); } isSortedValue = false; OnListChanged(new ListChangedEventArgs(ListChangedType.Reset, -1)); } } public void RemoveSort() { RemoveSortCore(); } protected override PropertyDescriptor SortPropertyCore { get { return sortPropertyValue; } } protected override ListSortDirection SortDirectionCore { get { return sortDirectionValue; } } } 

有了这个，您需要对上面发布的代码进行的唯一更改是根据列表创建SortableBindingList并绑定到可排序列表，而不是标准列表，如下所示：

 List list = new List(); list.Add(new MyClass("Peter", 1202)); list.Add(new MyClass("James", 292)); list.Add(new MyClass("Bond", 23)); // Added sortable list... SortableBindingList sortableList = new SortableBindingList(list); BindingSource bs = new BindingSource(); bs.DataSource = sortableList; // Bind to the sortable list 

这足以让你前进。

Answer 2

这篇博文真的对我很有帮助。

呈现SortableBindableList

另外，请查看如何实现DataGridView的自动排序？ 其中包含此示例和另一个库。