private void buttonAdd_Click(object sender, System.EventArgs e)
{
try
{
TreeListViewItem newitem = new TreeListViewItem("treeListView" + _items.Owner.ItemsCount.ToString());
TreeNode node = new TreeNode(newitem.Text);
node.Tag = newitem;
if (treeView1.SelectedNode != null)
{
TreeListViewItem item = (TreeListViewItem)treeView1.SelectedNode.Tag;
if (item.Items.Add(newitem) > -1)
{
treeView1.SelectedNode.Nodes.Add(node);
}
}
else
if (_items.Add(newitem) > -1)
{
treeView1.Nodes.Add(node);
}
if (node.Index > -1)
{
treeView1.SelectedNode = node;
}
}
catch (Exception ex) { MessageBox.Show(ex.Message); }
}
public void PopulateTree(XElement element, TreeListViewItemCollection items)
{
foreach (XElement node in element.Nodes())
{
TreeListViewItem item = new TreeListViewItem();
string title = node.Name.LocalName.Trim();
item.Text = title;
if (title == "Device")
{
var attr = node.Attribute("ItemType")?.Value;
switch (attr)
{
case "Channel": item.ImageIndex = 1; break;
case "RStreamer": item.ImageIndex = 3; break;
default: break;
}
item.SubItems.Add(node.Attribute("UniqueID")?.Value);
item.SubItems.Add(node.Attribute("ItemType")?.Value);
}
else
{
item.ImageIndex = 2;
item.SubItems.Add(node.Attribute("Value")?.Value);
}
if (node.HasElements)
{
PopulateTree(node, item.Items);
}
items.Add(item);
}
}
public void LoadItems <T>(IEnumerable <T> items, TreeListViewItemCollection Items, Func <T, string> getId, Func <T, string> getParentId, Func <T, string> getDisplayName, Func <T, int> getImageIndex, List <string> lstPropertyName)
{
//List<string> lstPropertyName = new List<string>();
Items.Clear();
dictItems.Clear();
foreach (var item in items)
{
var id = getId(item);
var displayName = getDisplayName(item);
var imageIndex = -1;
if (getImageIndex != null)
{
imageIndex = getImageIndex(item);
}
var treeListViewItem = new TreeListViewItem();
treeListViewItem.Name = id;
treeListViewItem.Text = displayName;
treeListViewItem.Tag = item;
if (imageIndex >= 0)
{
treeListViewItem.ImageIndex = imageIndex;
}
foreach (string propertyName in lstPropertyName)
{
object obj = PublicMethods.GetPropertyValue(item, propertyName);;
string str = "";
if (obj != null)
{
str = obj.ToString();
}
treeListViewItem.SubItems.Add(str);
}
dictItems.Add(id, treeListViewItem);
}
foreach (var id in dictItems.Keys)
{
var item = GetItem(id);
var obj = (T)item.Tag;
var parentId = getParentId(obj);
if (parentId != null)
{
var parentNode = GetItem(parentId.ToString());
parentNode.Items.Add(item);
}
else
{
Items.Add(item);
}
}
}
/// <summary>
/// Gets the items that are visible in the TreeListView
/// </summary>
/// <returns>A collection of items</returns>
public TreeListViewItemCollection GetVisibleItems()
{
TreeListViewItemCollection visibleItems = new TreeListViewItemCollection();
if(base.Items.Count == 0) return visibleItems;
if (TopItem == null) return visibleItems;
int firstItemIndex = TopItem.Index;
int itemsPerPageCount =
APIsUser32.SendMessage(new HandleRef(this, Handle), (int) APIsEnums.ListViewMessages.GETITEMCOUNT, IntPtr.Zero, IntPtr.Zero).ToInt32();
int lastVisibleItemIndex = firstItemIndex + itemsPerPageCount > base.Items.Count ?
base.Items.Count : firstItemIndex + itemsPerPageCount;
for(int i = firstItemIndex; i < lastVisibleItemIndex; i++)
visibleItems.Add((TreeListViewItem) base.Items[i]);
return visibleItems;
}
public void LoadPartItems <T, K>(IEnumerable <T> items, TreeListViewItemCollection Items, Func <T, string> getId, Func <T, string> getParentId, Func <T, string> getDisplayName, Dictionary <string, string> dictPropertyName, Func <T, int> getImageIndex, Func <T, Color> getForeColor) where K : class
{
this.BeginUpdate();
this.SuspendLayout();
#region 将TreeListViewItem放到字典中
this.Columns.Clear();
int columnWidth = (this.Width - 10) / (dictPropertyName.Count + 1);
int coulumnCounter = 0;
//先初始化列
foreach (KeyValuePair <string, string> dictItem in dictPropertyName)
{
ColumnHeader ch = new ColumnHeader();
ch.Text = dictItem.Value;
if (coulumnCounter == 0)
{
ch.Width = columnWidth * 2;
}
else
{
ch.Width = columnWidth;
}
coulumnCounter++;
this.Columns.Add(ch);
}
//再初始化数据行
foreach (var item in items)
{
var id = getId(item);
var imageIndex = -1;
if (getImageIndex != null)
{
imageIndex = getImageIndex(item);
}
var treeListViewItem = new TreeListViewItem();
treeListViewItem.Name = id;
treeListViewItem.Tag = item;
if (imageIndex >= 0)
{
treeListViewItem.ImageIndex = imageIndex;
}
treeListViewItem.ForeColor = getForeColor(item);
K clsK = item as K;
if (clsK != null)
{
#region TreeListViewItem
int columnCounter = 0;
foreach (KeyValuePair <string, string> dictItem in dictPropertyName)
{
object objValue = PublicMethods.GetPropertyValue(item, dictItem.Key);
string strValue = objValue == null ? "" : objValue.ToString();
if (columnCounter == 0)
{
treeListViewItem.Text = strValue;
}
else
{
treeListViewItem.SubItems.Add(strValue);
}
columnCounter++;
}
#endregion
}
else
{
treeListViewItem.Text = getDisplayName(item);
}
dictItems.Add(id, treeListViewItem);
}
#endregion
#region 将TreeListViewItem进行组装
foreach (var id in dictItems.Keys)
{
var item = GetItem(id);
var obj = (T)item.Tag;
var parentId = getParentId(obj);
if (parentId != null)
{
var parentNode = GetItem(parentId.ToString());
parentNode.Items.Add(item);
}
else
{
Items.Add(item);
}
}
#endregion
this.ResumeLayout(true);
this.EndUpdate();
}
internal void GetCheckedItems(ref TreeListViewItemCollection items)
{
if(Checked) items.Add(this);
foreach(TreeListViewItem item in Items)
item.GetCheckedItems(ref items);
}
