public class ListView2Handler<T> where T : class
{
private List<T> List { get; set; }
private ListView ListView { get; set; }
public event ColumnClickEventHandler ColClick;
public ListView2Handler(ListView listView)
{
this.List = new List<T>();
this.ListView = listView;
this.ListView.VirtualMode = true;
this.ListView.RetrieveVirtualItem += ListView_RetrieveVirtualItem;
this.ListView.ColumnClick += ListView_ColumnClick;
}
private void ListView_ColumnClick(object sender, ColumnClickEventArgs e)
{
if (this.ColClick != null)
{
this.ListView.Sorting = this.ListView.Sorting == SortOrder.Ascending ? SortOrder.Descending : SortOrder.Ascending;
this.OnColClick(e);
}
}
public virtual void OnColClick(ColumnClickEventArgs e)
{
for (int i = 0; i < this.ListView.Columns.Count; i++)
{
var text = this.ListView.Columns[i].Text;//
text = text.Replace("▽", "").Replace("△", "").Trim();
if (i == e.Column)
{
if (this.ListView.Sorting == SortOrder.Ascending)
{
text += "△";
}
else
{
text += "▽";
}
}
this.ListView.Columns[i].Text = text;
}
this.ListView.AutoResizeColumn(e.Column, ColumnHeaderAutoResizeStyle.HeaderSize);
this.ColClick?.Invoke(this.ListView, e);
}
private void ListView_RetrieveVirtualItem(object sender, RetrieveVirtualItemEventArgs e)
{
if (List.Any() && e.ItemIndex <= List.Count)
{
var mode = this.List[e.ItemIndex];
var item = GetListViewItems(mode, e.ItemIndex);
if (e.ItemIndex % 2 == 0)
{
item.BackColor = Color.FromArgb(250, 250, 240);
}
e.Item = item;
}
}
public void ShowColumHeader()
{
var ps = typeof(T).GetProperties();
if (ps != null)
{
foreach (var p in ps)
{
var attr = p.GetCustomAttribute<HanderDescriptionAttribute>();
if (attr != null)
{
if (attr == null)
continue;
ColumnHeader header = new ColumnHeader();
header.Text = attr.Name;
header.Tag = p.Name;
ListView.Columns.Add(header);
}
}
}
}
public void ClearData()
{
List.Clear();
ListView.Invoke(new MethodInvoker(() =>
{
ListView.VirtualListSize = List.Count;
ListView.Invalidate();
}));
}
public void LoadData(IEnumerable<T> datas)
{
ClearData();
if (datas == null)
return;
this.List.AddRange(datas);
ListView.Invoke(new MethodInvoker(() =>
{
ListView.VirtualListSize = List.Count;
ListView.Invalidate();
this.ListView.AutoResizeColumns(ColumnHeaderAutoResizeStyle.HeaderSize);
}));
}
public void RemoveItem(T item)
{
this.List.Remove(item);
this.ListView.VirtualListSize = List.Count;
this.ListView.Invalidate();
//this.listView.Refresh();
}
public List<T> Filter(Predicate<T> predicate)
{
return this.List.FindAll(predicate);
}
//public void Sort(Func<T, object> predicate)
public void Sort(Func<T, object> func)
{
var comparer = new ListViewItemComparer<T>(func, Comparer<object>.Default, this.ListView.Sorting);
this.List.Sort(comparer);
this.ListView.Invalidate();
}
public void EditData(T objItem)
{
var model = this.List.FindIndex(m => m == objItem);
if (model > -1)
{
this.List[model] = objItem;
}
this.ListView.Invalidate();
}
public ListViewItem GetFouseItem()
{
return this.ListView.FocusedItem;
}
public T GetSelectData()
{
var d = this.ListView.FocusedItem;
if (d != null)
{
return (T)this.ListView.FocusedItem.Tag;
}
return default(T);
}
public IEnumerable<T> GetSelectValues()
{
var ids = this.ListView.SelectedIndices;
for (int i = 0; i < ids.Count; i++)
{
yield return this.List[ids[i]];
}
}
private ListViewItem GetListViewItems(T model, int index)
{
var ps = model.GetType().GetProperties();
var item = new ListViewItem();
item.Tag = model;
foreach (var p in ps)
{
var da = p.GetCustomAttribute<HanderDescriptionAttribute>();
if (da == null)
continue;
var value = p.GetValue(model);
if (da.IsPrimary)
{
//if (index > 0 && value != null && p.PropertyType == typeof(int))
//{
// p.SetValue(model, index);
//}
if (value == null || (value.GetType() == typeof(int) && (int)value == 0))
{
item.Text = index + da?.ExStr;
continue;
}
item.Text = value?.ToString() + da?.ExStr;
continue;
}
item.SubItems.Add(value?.ToString() + da?.ExStr);
}
return item;
}
}
public class ListViewItemComparer : IComparer
{
private int col;
private SortOrder order;
public ListViewItemComparer(int column, SortOrder sortOrder)
{
col = column;
order = sortOrder;
}
public int Compare(object x, object y)
{
int returnVal = -1;
// 按字符串排序
string strX = ((ListViewItem)x).SubItems[col].Text;
string strY = ((ListViewItem)y).SubItems[col].Text;
returnVal = String.Compare(strX, strY);
// 根据排序方式反转结果
if (order == SortOrder.Descending)
{
returnVal *= -1;
}
return returnVal;
}
}
public class ListViewItemComparer<T> : IComparer<T> where T : class
{
private Func<T, object> _keySelector;
private IComparer<object> _valueComparer;
private readonly SortOrder sortOrder;
public ListViewItemComparer(Func<T, object> keySelector, IComparer<object> valueComparer, SortOrder sortOrder)
{
_keySelector = keySelector;
_valueComparer = valueComparer;
this.sortOrder = sortOrder;
}
public int Compare(T x, T y)
{
object xValue = _keySelector(x);
object yValue = _keySelector(y);
var returnVal= _valueComparer.Compare(xValue, yValue);
// 根据排序方式反转结果
if (sortOrder == SortOrder.Descending)
{
returnVal *= -1;
}
return returnVal;
}
}
public class HanderDescriptionAttribute : Attribute
{
public string Name { get; set; }
public bool IsPrimary { get; set; }
public string ExStr { get; set; }
}
