I have some questions that are situated in distinct panels. I place button "Add" in every panel. This button is supposed to add additional textbox to panel. But I don't know what to write in button_click. What panel to choose?
private void button_Click(object sender, EventArgs e)
{
}
Use Control.Parent property.
private void button_Click(object sender, EventArgs e)
{
Button button = sender as Button;
if (button == null)
return; //Some error/exception
Panel parentPanel = button.Parent as Panel;
if (parentPanel == null)
{
//Parent container is not panel
}
//Otherwise get the panel properties.
}
I'll assume all the "Add" buttons are subscribed to this same event.
The value of sender will be the particular "Add" button that was just clicked. Then you can cast the button's Parent to a Panel:
var button = (Button)sender;
var parentPanel = (Panel)button.Parent;
These two lines will be sufficient as long as
You don't accidentally attach some other control other than a button to this event
All the "Add" buttons are contained within a Panel.
Related
so what i want to do is, on Event ButtonClick disable parent Control of this button.
In my Form i have several Panel's in which those button actually are.
I am using following code:
private void button1_Click(object sender, EventArgs e)
{
Control control = button1.Parent;
control.Enabled = false;
}
This xode is working fine, but I wanted to use this.Parent instead of button1.Parent, so that each button would be able to disable its own parent Panel(in this case will disabled Panel of button1).
When i am using this.Parent I get a System.NullReferenceException.
Knows some one why i am getting this error ?
this is your current class you want to use the sender and cast it to Control than get it's parent something like this
private void button1_Click(object sender, EventArgs e)
{
var uc = sender as Control;
uc.Parent.Enabled = false;
}
this represents the Window, which has no Parent.
You can do the following:
private void button_Click(object sender, EventArgs e){
Control control = ((Button) sender).Parent;
control.Enabled = false;
}
Button[] buttons = {button, button2....};
foreach (Button button in buttons)
button.Click += button_Click;
Alternatively, you can create a class inheriting from Button. You can then add a Click event handler that disables it's parent control. You can then use this button instead of the default one.
I noticed that by programmatically selecting a Tab in the Tab control selects a control contained in the tab page selected.Is it possible to change this behaviour. I have a control in a tabpage that I do not want to be selected when the its tab page is selected from a button click. I have a simple form with a tab control and two tab pages. When button1 is clicked the tab page 2 is selected but so is the datagridview contained in that tab page.
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
dataGridView1.GotFocus += DataGridView1_GotFocus;
}
private void DataGridView1_GotFocus(object sender, EventArgs e)
{
//this event is called from button1_click
}
private void button1_Click(object sender, EventArgs e)
{
tabControl1.SelectedTab = tabPage2;
}
}
By default when you select a tab (or even when you start a form) the control which is the first in your tab order is automatically focused. I am assuming this is what is happening here.
You can solve this by simply unfocusing the datagridView in question. There are multiple ways to do this. Firstly you can set focus to the control that you wish to be selected instead of the dataGridView. This can be done by:
myControl.Focus = True;
Or alternatively if you want non of the controls to be selected you can set the active control to Null:
ActiveControl = NULL;
Note: ActiveControl is a property which contains the current active control.
As to where this code should be placed. That is totally dependent upon you. You can do it as soon as you change the tab in the button click event. This is what I would prefer.
I am sure there are other kludges as well to acheive the same. Hope this helps.
Here is code to select tab
private void button1_Click(object sender, EventArgs e)
{
// we can select tab by tab name
tabControl1.SelectTab("tabPage2");
tabControl1.SelectedIndex = 1;
tabControl1.TabPages[0].Hide();
tabControl1.TabPages[1].Show();
}
I have made 2 user controls. First one contains a textbox and a button. In the second one there is a panel and a repeater control is used. Now when I am writing in the textbox 2nd control will open as a popup and and after focusing to textbox I am unable to write. I have searched a lot about this but nothing works.
CustomPopup customPopup;
Popup popup;
popup = new Popup(customPopup = new CustomPopup());
private void txtSearch_TextChanged(object sender, EventArgs e)
{
popup.Width = Width;
popup.Show(this);
popup.AutoClose = false;
}
In this way I am opening the popup from the textbox text changed event.
You can use this textbox event.
private void textBox1_Enter(object sender, EventArgs e)
{
}
this event call whenever textbox get focus
I have encountered some problems in the bookmark section for my wpf web-browser. I want to be able to delete already existing buttons but I can't seem to figure out how to detect the content of the button I right click on. (To get my ContextMenu to show).
My visual progress so far: http://puu.sh/6Dxat.png
Adding a context menu to the buttons:
public void button_MouseRightButtonDown(object sender, MouseButtonEventArgs e)//add a context menu to buttons
{
Button button = sender as Button;
menu = new ContextMenu();
menu.Items.Add(new MenuItem() { Header = "Delete" });
button.ContextMenu = menu;
menu.Closed += button_DeleteButtonClicked;//find the right event
}
(I know that the event is wrong, but that is not important right now.)
And the event:
private void button_DeleteButtonClicked(object sender, RoutedEventArgs e)//delete bookmark
{
//This is where I need help. I want the content (which is the URL) of the button
//right clicked onto, for example, show up in a messagebox. How to do?
}
Since you have hooked Close event of context menu here, so sender will be ContextMenu here and you can get button by using PlacementTarget property of ContextMenu.
private void button_DeleteButtonClicked(object sender, RoutedEventArgs e)
{
Button button = ((ContextMenu)sender).PlacementTarget as Button;
}
I have the code below.
public void WepaonEquip(Object sender, System.EventArgs e)
{
if (button[0].BackColor == Color.Beige)
{
button[0].BackColor = Color.OrangeRed;
}
else if (button[1].BackColor == Color.Beige)
{
button[1].BackColor = Color.OrangeRed;
}
else if (button[2].BackColor == Color.Beige)
{
button[2].BackColor = Color.OrangeRed;
}
}
The code in the class containing this chunk of code generates a button array. What I want is that the user will click a button and the colour of the button clicked will change.
However, when the user clicks, lets say, the 3rd button, the first button in the array changes colour, not the one clicked. Any idea as to why this isn't working? I believe the logic of the code works, perhaps I'm missing something.
Set each button in the panel to use the same Click Event handler. In the handler cast sender as a button and change the color
Assuming that WeaponEquip is the click event handler for the buttons it would look something like this:
public void WepaonEquip(Object sender, System.EventArgs e)
{
Button clickedbutton = (Button)sender
clickedbutton.BackColor = Color.OrangeRed;
}