Is it possible to get the parent name of a control ? ex. I have a panel and there is a button inside it.
what I want is if i click the button i'll get the name of the panel.
Well if the button is inside the panel (which is a container), you could get it using:
var panelName = myBtn.Parent.Name;
Useful links:
Control.Parent which returns a Control object.
As per the comment of DaveShaw, if you're working with events you could get the parent from the sender argument:
var myBtn = sender as Button;
var panelName = myBtn.Parent.Name;
Related
The first line is able to clear the panel but doesnt seem to show the usercontrol in the panel in the parent form.
panel1.Parent.Controls.Clear();
if (panel1.Parent == null)
return;
messagessent uc = new messagessent();
uc.Dock = DockStyle.Fill;
panel1.Parent.Controls.Add(uc);
Why you use panel1.Parent? In this way, you remove all controls not from the panel itself, but from the parent control on which this panel is located.
This action removes the panel itself. And, accordingly, the panel does not have a parent now. The Parent property becomes null.
I suppose you need to write like this:
panel1.Controls.Clear();
messagessent uc = new messagessent();
uc.Dock = DockStyle.Fill;
panel1.Controls.Add(uc);
I'm creating a new tab on a TabControl, and inside of that tab contains a RichTextBox semi-dynamically named by setting the name Variable like so:
chatWindow.Name = name + "ChatArea";
"name" being the name of the chat channel the user has joined.
ex: name = Test, RTB Name would be: TestChatArea.
Is there an easy way to access that control via code, or am I going about this the completely wrong way?
To programmatically retrieve the TabPage where your RichTextBox control is contained you should search all the tabPage inside your TabControl and check if any RichTextBox in that page has the Name that you are searching for
foreach(TabPage tp in yourTablControl.TabPages)
{
RichTextBox rtb = tp.Controls.OfType<RichTextBox().FirstOrDefault(x => x.Name == name + "ChatArea");
if(rtb != null)
{
// rtb is your control, do your stuff in a sub
// passing the found control and break the loop
DoYouStuffWithRichTextBox(rtb)
break;
}
}
Of course you need to have a way to identify the variable part of this code. Meaning the variable name should have been set before entering this loop with the actual value that you are searching for.
This code will be simpler if we can assume that you have just one RichTextBox for each TabPage. In this case, when dinamically creating the TabPage and its RichTextBox you could set the Name property of the TabPage to your chat area and use that as a way to identify your control
TabPage tp = yourTablControl.TabPages["chatAreaName"];
RichTextBox rtb = tp.Controls.OfType<RichTextBox().FirstOrDefault();
if(rtb != null)
{
....
How to find dynamically created XAML component by Name in C#?
I created next button and put it into the Stack Panel.
var nextButton = new Button();
nextButton.Name = "NextBtn";
next.Children.Add(nextButton);
then tried to find it with
this.FindName("NextBtn")
and it always comes null.
What am I doing wrong?
Use RegisterName instead of nextButton.Name = "NextBtn";
var nextButton = new Button();
RegisterName("NextBtn", nextButton); // <-- here
next.Children.Add(nextButton);
You can then find it with:
this.FindName("NextBtn")
As Farhad Jabiyev mentioned I created duplicate.
As related question (FindName returning null) explaines
from this page https://msdn.microsoft.com/en-us/library/ms746659.aspx
Any additions to the element tree after initial loading and processing
must call the appropriate implementation of RegisterName for the class
that defines the XAML namescope. Otherwise, the added object cannot be
referenced by name through methods such as FindName. Merely setting a
Name property (or x:Name Attribute) does not register that name into
any XAML namescope.
You could find the button manually, for example:
foreach (var child in next.Children)
{
if (child is Button && (child as Button).Name == "NextBtn")
;// do what you want with this child
}
Or:
var btn = next.Children.OfType<Button>().FirstOrDefault(q => q.Name == "NextBtn");
if (btn != null)
;// do what you want
I am generating x amount of buttons and I give all of them a unique name.
After all those are generated, I want to edit one of them without regenerating them so I was wondering if I could get a component by its name?
I am using WinForms
Yes:
Control myControl = Controls.Find("textBox1");
Now, beware that you have to do proper casting hen found, because Find returns a control.
You can use Controls property of your form (or some container control on your form). With LINQ you can select buttons and then find first button with required name:
var button1 = Controls.OfType<Button>().FirstOrDefault(b => b.Name == "button1");
Or if you want to search child controls recursively
var button1 = Controls.Find("button1", true)
.OfType<Button>()
.FirstOrDefault();
Without LINQ you can use method Find(string key, bool searchAllChildren) of ControlCollection:
Control[] controls = Controls.Find("button1", true);
if (controls.Length > 0)
{
Button button1 = controls[0] as Button;
}
Button btn1 = (Button)(Controls.Find("btnName"));
This will get the required button and will save the button attributes into a new Button btn1
After all those are generated, I want to edit one of them without
regenerating them so I was wondering if I could get a component by its
name?
var myButton = Controls.Find("buttonName", true).FirstOrDefault(); //Gets control by name
if(myButton != null)
{
if (myButton.GetType() == typeof(Button)) //Check if selected control is of type Button
{
//Edit button here...
}
else
{
//Control isn't a button
}
}
else
{
//Control not found.
}
Make sure you add a reference to: linq.
I have a tab control through which the user can right-click within one of several richTextBoxes. The textBoxes use the same contextMenuStrip control, and I need to determine which textBox is the active one within the contextMenuStripCopyPaste_Opening event. I would think that the code to determine this would be
tabControl1.SelectedTab.ActiveControl.Name but the ActiveControl property is not available. this.ActiveControl.Name just gives me the name of the tabControl.
How can I determine which textBox is the active control within the tabControl?
You can use the sender paramter to get the ContextMenuStrip then call the ContextMenuStrip.SourceControl property to get the control that opened the context menu.
In this case you can try the following code.
private void contextMenuStrip1_Opening(object sender, CancelEventArgs e)
{
var ctxStrip = sender as ContextMenuStrip;
if (ctxStrip == null)
return;
var rtb = ctxStrip.SourceControl as RichTextBox;
if (rtb == null)
return;
}
This code simply casts the sender object to a ContextMenuStrip if this is null then return. (Although should never be). The next line captures the SourceControl and casts the control to a RichTextBox.
If the source control is not a RichTextBox then the result will be null and we cancel as this shouldn't be null unless you bind the context menu to other controls aswell.
I'm not finding anything that is there by default. I would create a list of the rich text boxes, and then use a LINQ statement as the LINQ Select statement would return only the rich text box that has the focus. Something like this.
List rtbList = new List {RichTextBox1, RichTextBox2, RichTextBox3, RichTextBox4}
var FocusedRTB = rtbList.Select(x => x.Focused == true);
switch (FocusedRTB.Name)
{Execute Code for each RichTextBox
}