I have a ContextMenu assigned to two ListViews. How to know which ListView it was used with so I can apply correct method? I guess sender is important here but how do I use it? How to know what sender is at this very moment?
private void contextMenuDokumentyDodaj_Click(object sender, EventArgs e) {
var dokumenty = new DocumentsGui(varKlienciID, varPortfelID);
dokumenty.Show();
dokumenty.FormClosed += varDocumentsGui_FormClosed;
}
ContextMenu.SourceControl
is your ticket.
http://msdn.microsoft.com/en-us/library/system.windows.forms.contextmenu.sourcecontrol.aspx
EDIT
ContextMenuStrip, you say?
http://msdn.microsoft.com/en-us/library/system.windows.forms.contextmenustrip.sourcecontrol.aspx
Did you try the following?
ListView listViewClicked = (ListView) sender;
EDIT (after comments)
The sender is the ToolStripMenuItem, so use a cast to get it, then use GetCurrentParent method to get the ContextMenuStrip containing the item, then use the SourceControl property to get the control displaying your menu, as suggested by #sq33G:
ListView lv = ((ToolStripMenuItem) sender).GetCurrentParent().SourceControl;
Maybe you'll need also to cast the GetCurrentParent return value to a ContextMenuStrip.
Related
I am from Iran and I cant speak English very well, sorry.
I made something like OpenFileDialog in WinForms
and work correctly.
After, for better user interface, I tried to make it in WPF.
I use TreeView and other controls for it in both platforms (Winforms and WPF)
in Winforms I could do this correctly usingbelow code:
private void Folder_FileTreeView_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
{
Folder_FileTreeView.Nodes.Clear();//this is necessary to clean first page node, after get new folders
if(e.Node.Text=="Desktop")//also this code is necessary to compare node
{
//Do something
}
}
Also in WPF I can get text of Item by below code:
private void Folder_FileTreeView_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
if (e.NewValue!=null)
{
StackPanel CustomStackPanel = (StackPanel)((TreeViewItem)e.NewValue).Header;
TextBlock textBlock = (TextBlock)CustomStackPanel.Children[1];
nodetext = textBlock.Text;//this line return text of item for compare
}
Folder_FileTreeView.Items.Clear();
}
If I don't use Folder_FileTreeView.Items.Clear() the above code return folders without clearing first page, but if I do use Folder_FileTreeView.Items.Clear() e.NewValue returns null.
Please help me to use together these codes: Folder_FileTreeView.Items.Clear();(or clear first page) and get text of selecteditem by user without return null
Thanks A lot
e.NewItem will be null if the TreeView used to have an item selected but now does not. When you clear the items, you are removing any selection, this of course changes the selection and raises the SelectedItemChanged event with null as the new selection- since there are no possible items that could be selected.
If you want to replace the items in the list with new items after the user makes a selection, the selected item will be null while that change is happening. You need to do the following:
Handle the SelectedItemChanged event and remember the new selected item in a variable.
For example, if they click on the item for "Desktop" set a variable (e.g. Path) to the path for the user's desktop (e.g. C:\Users\UserName\Desktop).
Clear the list of folders in the TreeView. This will trigger SelectedItemChanged again, but you want to ignore it this time because e.NewItem == null.
Read all the folders in Path and make new items for each of those folders.
The way was found by below code
private void Folder_FileTreeView_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
Folder_FileTreeView.SelectedItemChanged -= Folder_FileTreeView_SelectedItemChanged;
if (e.NewValue!=null)
{
StackPanel CustomStackPanel = (StackPanel)((TreeViewItem)e.NewValue).Header;
TextBlock textBlock = (TextBlock)CustomStackPanel.Children[1];
nodetext = textBlock.Text;//this line return text of item for compare
}
Folder_FileTreeView.Items.Clear();
Folder_FileTreeView.SelectedItemChanged += Folder_FileTreeView_SelectedItemChanged;
}
thank very much for every one helped me
I want to use listview to populate it with data and then use mouseclick event to fill some textboxes with data. I looked up an example in msdn:
ListViewItem theClickedOne = listView1.GetItemAt(e.X, e.Y);
ListViewItem theClickedtwo = listView1.FocusedItem;
if (theClickedOne != null)
{
MessageBox.Show(theClickedtwo.ToString());
//do your thing here.
//there is a reference to the listview item we clicked on
//in our theClickedOne variable.
}
but I couldn't think about a way to use it in order to differentiate the listviewitems I use since the fist Column in my program is the same and it will only give me a string with it's name(first Column).I want to have something similar to next example but for treeview.
void treeView1_NodeMouseClick(Object sender, TreeNodeMouseClickEventArgs e)
{
MessageBox.Show(e.Node.Text);
}
When populating you ListView, set the Tag property of the items, e.g.
newItem.Tag = "Item 1";
The Tag property has type object, so you can use anything you want here to identify the item. When handling the mouse click event simply check the Tag value again:
if((string)(clickedItem.Tag) == "Item 1")
{
// do stuff for this specific item.
}
In my code I'm using a list box to display objects from a class I'm creating. What I want is to be able to click on an item in the list box and programmatically use the selected item. The items come from a Dictionary as shown below.
private Dictionary<Int32, MyClass> collection;
public Window1()
{
ListBox1.SelectionChanged += new SelectionChangedEventHandler(ClickAnItem);
ListBox1.ItemSource = collection;
}
Now, this all works and the ListBox displays my collection like I would expect, and I have the event firing as it should, but I'm stuck on how to actually use the selected value.
private void ClickAnItem(object sender, RoutedEventArgs e)
{
ListBox list = sender as ListBox;
/** list has the Int32 and the MyClass object but I can't seem to
* get them out of there programmatically
*/
}
I've tried casting the ListBox.SelectedItems into an object of type Dictionary to no avail.
I didn't run it, but here is a question that seems similar. However, I would like to stay away from editing XAML if possible. The more I can do at run-time the better.
So my question is, how do I get access to the 'Int32' and the 'MyClass' of the selected item? I've used C# in the past but I'm just now jumping back into it and this has been bugging me for over an hour.
You need to get the value from the SelectedItem property on the ListBox and cast it to the appropriate type. In your case this will be a KeyValuePair<Int32, MyClass> as that is what makes up your Dictionary
Give this a try:
private void ClickAnItem(object sender, RoutedEventArgs e)
{
ListBox list = sender as ListBox;
var selectedItem = listBox.SelectedItem as KeyValuePair<Int32, MyClass>;
}
how can I get the clicket elevent from a ListView which has the IsItemClickEnabled enabled?
I know how to get the selected Item/Index but not the clicked item.
ItemClick is working but I can not say s.th. like:
Object selection = listView1.SelectedItem;
EDIT:
I have a ListView and I need to catch the clicked item from this list in the following method:
private void listView1_ItemClick(object sender, ItemClickEventArgs e)
{
...
}
I may be missing something, but doesn't the following work for you?
private void lv_ItemClick_1(object sender, ItemClickEventArgs e)
{
var item = e.ClickedItem as String;
}
Here I assume the items in the list are simple strings, but in general they'll be whatever type you are using in the collection you've bound to the ItemsSource property of the ListView.
I guess you can also try the SelectionChanged event, and get the clicked item as e.AddedItems or MyListView.SelectedItem or MyListView.SelectedItems.
I have a context menu that looks like this
A
|--1
|--2
|--3
I need to access the object that the context menu is called from, after selecting 1 2 or 3
meaning if this is a context menu of a textbox1 then I need to access that object, how do I do that?
Forgot to mention, this is a WPF application. so Im using the System.Windows.Controls
and the ContextMenu is created programmatically
You can walk up the tree and get the control from the ContextMenu.PlacementTarget, e.g.
private void MenuItem_Click(object sender, RoutedEventArgs e)
{
var item = sender as MenuItem;
while (item.Parent is MenuItem)
{
item = (MenuItem)item.Parent;
}
var menu = item.Parent as ContextMenu;
if (menu != null)
{
var droidsYouAreLookingFor = menu.PlacementTarget as TextBox;
//...
}
}
You can look at the SourceControl property of the ContextMenuStrip that owns the context menu item that was clicked.
For example, in the Click handler for the menu item:
private void aToolStripMenuItem_Click(object sender, EventArgs e)
{
var control = ((sender as ToolStripMenuItem).Owner as ContextMenuStrip).SourceControl;
...
}
Of course if you only have one ContextMenuStrip on the form, you can just reference it directly
var control = myContextMenuStrip.SourceControl;
Slight tweak to HB's answer. HB deserves the credit. Helped me find a DataGrid.
private void MenuItem_Click(object sender, RoutedEventArgs e)
{
MenuItem item = sender as MenuItem;
ContextMenu cm = (ContextMenu)item.Parent;
Popup popup = (Popup)cm.Parent;
var finalGoal = popup.PlacementTarget as DataGrid;
}
use the
ContextMenu.SourceControl
that's the variable that calls the context menu. all you need to do is cast the control
found the answer from a similar question
Get owner of context menu in code
viky's code works, but I had to cast it twice.
I guess looping the casting of the Parent is possible for better flexibility
(more casts depends on how deep the clicked item is)
Ugly Solution
I am searching for a better way to do the same thing. For now, the code below works:
TextBlock tb = ((sender as MenuItem).Parent as ContextMenu).PlacementTarget as TextBlock;
Replace TextBlock with your control's type.