I have a treeview which have several childs and many of them have ancestors.
I also have a datagridview along side the treeview. Based on treeview selected node, I bind data in Datagridview.
I use treeView1.SelectedNode to get the node value
My problem is that this expression give the previously selected node.
private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
{
node = e.node;
}
this give me correct node (selected node).
but
node = treeview1.selectednode give the node which I selected earlier.
I want to get the selected node outside the click event (_nodemouseclick).
How can I get It.
I dont want to save node in global variable then use it.
Hope I am clear to explain my question.
Thanks in anticipation.
TreeNode yourGlobalTreeNode;
void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
{
yourGlobalTreeNode = e.Node;
otherFunction();
anOtherFunction(e.Node);
}
void otherFunction()
{
MessageBox.Show(yourGlobalTreeNode.Text);
}
void anOtherFunction(TreeNode tn)
{
MessageBox.Show(tn.Text);
}
Other Function means you can use this tree_node anywhere using above two methods.
It is because MouseClick event is raised before selectedNode is changed. Try to use SelectedItemChanged event instead
private void TreeView1_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
}
Related
in c# windows application i have a tree view with different nodes associated with Check Box for each node(this is for multiple Node Selection). how to change the Check Box property to checked when we click on respective node?
private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
{
TreeNode node = e.Node;
node.Checked = true;
}
Try this event ...
I use a treeview of checkboxes.
The root nodes specify the group name.
When the user check the root node I would like to check all its nested notes.
Therefore, I would like to use the CheckChanged event of CheckBox in the treeview.
Is it possible? If so, how?
You should use AfterCheck event and another help procedure, called recursively. Something like this:
private void tvwTest_AfterCheck(object sender, TreeViewEventArgs e)
{
checkNodes(e.Node);
}
private void checkNodes(TreeNode root)
{
foreach (TreeNode node in root.Nodes)
{
node.Checked = root.Checked;
checkNodes(node);
}
}
I make windows form application. I have on form TreeView, I add few nodes and add ContextMenuStrip.
var menu = new ContextMenuStrip();
menu.Items.Add("Some text", new Bitmap(1, 1), new EventHandler(function_name));
var treeView = new TreeView(..);
treeView.ContextMenuStrip = menu;
treeView.Nodes.Add(new TreeNode()
{
...
Tag = someObject
});
My problems is how can I check in function function_name on which treeNode was clicked and chosen option from ContextMenuStrip
edit
function_name sygnature
public void pokaz_DoubleClick(object sender, EventArgs e)
{
}
You can handle the TreeNodeMouseClick event. In your TreeNodeMouseClickEventHandler you will have access to a TreeNodeMouseClickEventArgs argument. This argument contains a number of properties you can use to check which mouse button was clicked on which node. For example.
private TreeNode rightClickeNode;
void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
{
if (e.Button == MouseButtons.Right)
{
rightClickedNode = e.Node;
}
}
You can then access rightClickedNode from your function_name.
what is the signature of the function_name method?
generally you can check the content of the sender parameter but it could happen it is the TreeView and not the TreeNode, if so you can check the properties of the e parameter.
Another way is that at every mouse down you make sure you select the node under the mouse in the TreeView so when function_name executes you get your node taking treeview.SelectedNode
You can make the node selected right before the Context Menu is shown and then you just need to check the SelectedNode property. Something like this:
private void treeView_MouseDown(object sender, MouseEventArgs e)
{
//See what node is at the location that was just clicked
var clickedNode = treeView.GetNodeAt(e.Location);
//Make that node the selected node
treeView.SelectedNode = clickedNode;
}
private void function_name(object sender, EventArgs e)
{
var currentNode = treeView.SelectedNode;
//Do something with currentNode
}
I want to call a code-behind method when a TreeNode is clicked in my TreeView. I would imagine this isn't difficult to do, but I can't find a good example of how to do it.
I've looked at TreeNodeSelectAction, but that appears to just be an enumeration, so I'm wondering how I can call my own code when a node is clicked.
Try add the SelectedNodeChanged event handler to the TreeView control. Then, you can select the method by the TreeNode name.
protected void MyTreeView_SelectedNodeChanged(object sender, EventArgs e)
{
TreeView treeView = sender as TreeView;
if (treeView != null)
{
TreeNode treeNode = treeView.SelectedNode;
}
}
Hope it helps
I m working on windows project and using c#. I want to catch treeview selected node which i click that by right click.
I'm writing tvlocation.SelectedNode.Index
but it return only Root Node's index.
Thanks for your helps...
If you are looking to identify the node that was clicked on, then handle the NodeMouseClick event, as follows:
private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
{
if (e.Button == MouseButtons.Right)
{
MessageBox.Show(string.Format("Node clicked: {0}", e.Node.Text));
}
}
You could select the node programatically here, if you need that too.