I wanted to set a toolbar to be the active control of the form, did something like this:
this.ActiveControl = this.Controls.Find("toolStrip2", false);
but it is saying it cann't contvert from Control[] to Cnotrol.
So how can I set that toolbar to be the active control?
The method Find returns array of Control instances whose name matches the string you pass to it. The first control in the array, if there is one, should be the one you are looking for.
You can do it using this code:
Control[] controls = this.Controls.Find("toolStrip2", false);
if (controls.Length > 0)
this.ActiveControl = controls[0];
Related
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)
{
....
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
}
I'm facing the fact that i cannot understand Well how AdornerLayer is added for UIElements.
I have such a situation:
I have a WPF Form which is built with 3 controls:
A Grid on which are 1 Button and 1 TextBox.
In my System, when I click to open this Form, all 3 elements have AdornerLayer not null .
var controls = _frameworkElementProvider.GetUIElements(Content);
var controlsWithAddorner = new List<FrameworkElement>();
foreach (var control in controls) {
var adornerLayer = AdornerLayer.GetAdornerLayer(control);
if (adornerLayer != null) {
controlsWithAddorner.Add(control);
}
}
The collection controlsWithAddorner contains all my 3 controls.
The method GetUIElements(FrameworkElement parent) returns an IEnumerable<FrameworkElement> in which are all controls within a Panel.
I have such a functionality:
Refresh Form Designer. Which recreates the xaml for that Form.
After that Refresh is done, I check the list of controls for AdornerLayer. For all controls the AdornerLayer is null.
The problem is here, I cannot understand where AdornerLayer (s) are lost?
Should I take care To add them forr each UIElement when I Refresh the Designer of the Form?
Please advice me with some suggestions.
Thank you!
EDIT:
I'll show all the solution if other will encounter such problems :)
The mission is: When there is a SelectedControl in designer, keep it selected even a RefreshDesigner is done.
RefreshDesigner functionality recreates the xaml for the whole form.
// Refresh the Designer
private void RefreshDesigner() {
Content = _xamlProvider.ParseXaml(_xaml.ToString());
//Here was the Problem. All visual child elements of the Content wa not updated after xaml recreation.
//By including that call -> solved the problem
Content.UpdateLayout();
}
Firstly: The xaml of the Form is Updated by using the ParseXaml() method from XamlProvider
// in XamlProvider class
public Panel ParseXaml(string xaml) {
var regex = new Regex("<Grid ");
const int first = 1;
xaml = Regex.Replace(xaml, #"xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml""", string.Empty);
xaml = Regex.Replace(xaml, #"xml:space=""preserve""", string.Empty);
//...
xaml = Regex.Replace(xaml, "<BindingGroup .*/>", string.Empty);
var content = (Panel)XamlReader.Parse(xaml);
return content;
}
Secondly: Content.UpdateLayout();
Ensures that all visual child elements of this element are properly updated for layout.
MSDN Official source
After that, All elements have AdornelLayer not Null and I'm able to set the Adorner Border for preciosly selected control in designer.
After the Form is Refreshed, call Content.UpdateLayout(); to Ensures that all visual child elements of the Content were properly updated for layout. MSDN official
I used this code below to Enable/Disable Button Control inside my usercontol on my Form which works perfect.
var btnAdd = this.userControlCommonTask1.Controls.Find("btnAdd", true);
btnAdd[0].Enabled = true;
But when i use toostrip(toolstrip1) with buttons (btnAdd,btnEdit,btndelete etch..) and use my code above
I got:
Index was outside the bounds of the array.
I tried this one but it only works in toolstrip.
var btnAdd = this.userControlCommonTask1.Controls.Find("toolstrip1", true);
btnAdd[0].Enabled = true;
Thanks in Regards
I already Solve my Problem:
var toolstrip1 = this.userControlCommonTask1.Controls.Find("toolstrip1", true);
var toolstrip1Items = toolstrip1[0] as ToolStrip; <-- set to toolstrip control
var btnRead = toolstrip1Items.Items.Find("btnRead", true); <--get BtnRead on toolstrip Item.Find
btnRead[0].Enabled = false; <--disable/Enable btn
This can be a reference for other Developers.
Cheers!
Try a 0 instead of 1 your array is zero based
Toolstrip is another usercontrol. Try make a reference to it and then find it's child controls
ie. ctlTooolStrip.Controls.Find("BtnAdd",true);
Also try toolStrip.Items