//Get Tag of selected nodes in treeteaview
/// <summary>
/// Casts the Tags of all currently selected nodes to the type T, but only returns the succesfully casted tags (=only where tag is of type T)
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="self"></param>
/// <returns>Returns only the tags, where the tag actually is of type T</returns>
public static IEnumerable <T> GetSelectedTags <T>(this TreeTeaView self)
{
List <T> data = new List <T>();
foreach (TreeNode node in self.SelectedNodes)
{
if (node.Tag is T)
{
data.Add((T)node.Tag);
}
}
return(data);
}
/// <summary>
/// Tries to cast the Tag of the all currently selected nodes to the type T and returns true if all nodes have been succesfully casted. Returns only succesfully casted tags (=only whea tag is T)
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="self"></param>
/// <param name="data"></param>
/// <returns>True if all the Tags of the selected nodes are of type T</returns>
public static bool GetSelectedTags <T>(this TreeTeaView self, out IEnumerable <T> data)
{
List <T> tmp = new List <T>();
bool allSuccessfullyCasted = true;
foreach (TreeNode node in self.SelectedNodes)
{
if (node.Tag is T)
{
tmp.Add((T)node.Tag);
}
else
{
allSuccessfullyCasted = false;
}
}
data = tmp;
return(allSuccessfullyCasted);
}
/// <summary>
/// Returns true if all the Tags of the any currently selected nodes are of type T
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="self"></param>
/// <returns></returns>
public static bool IsSelectedTagsOfType <T>(this TreeTeaView self)
{
return(self.SelectedNodes.All(x => x.Tag is T));
}
/// <summary>
/// Checks whether all currently selected nodes are of type T
/// </summary>
/// <typeparam name="T">Must be derived class of TreeNode</typeparam>
/// <param name="treeView"></param>
/// <returns>True if the selected node is of type T</returns>
public static bool IsSelectedNodesOfType <T>(this TreeTeaView treeView) where T : TreeNode
{
return(treeView.SelectedNodes.All((node) => node is T));
}
/// <summary>
/// Returns a collection of all currently selected nodes, which are of type T
/// </summary>
/// <typeparam name="T">Must be derived class of TreeNode</typeparam>
/// <param name="treeView"></param>
/// <returns></returns>
public static IEnumerable <T> GetSelectedNodesOfType <T>(this TreeTeaView treeView) where T : TreeNode
{
return(treeView.SelectedNodes.OfType <T>());
}
