I am pretty new in WPF C#. I am held up with the following Issue:
Lets say I have a MainWindow.xaml, and have the main program logic in it.
I have a second window, called Second.xaml
I am calling Second.xaml in MainWindow.xaml.cs,
currently I am doing:
MainWindow.xaml.cs:
var wind = new Second();
wind.Show();
This successfully opens the second window, where I have a few buttons.
My motive is to trigger events in MainWindow using Second.xaml.cs
(i.e.)
in Second.xaml.cs:
....
..
MainWindow mainwindowID = new MainWindow();
....
..
.
private void nextButton_Click(object sender, RoutedEventArgs e)
{
mainwindowID.textBox.Content = "Displaying In Mainwindow";
}
When I click the Next button in Second.xaml, I want the text Box inside Mainwindow to be updated.
Though the program in running, nothing changes inside MainWindow.
Is it possible to control it like that?
I have the MainWindow displayed using a projector, and the second window on the monitor. So I trigger events inside the second window and want them to be displayed in the MainWindow.
Is there any other solution for this kind?
Update:
If the textbox is inside SecondPage.xaml and displayed inside MainWindow.xaml using a Frame, how do I call it from Second.xaml?
In the first window (MainWindow) you can invoke the second window in this way:
var wind = new Second();
wind.FirstWindow = this;
wind.Show();
while the second window can look like this:
public MainWindow FirstWindow { get; set; }
private void nextButton_Click(object sender, RoutedEventArgs e)
{
FirstWindow.textBox.Content = "Displaying In Mainwindow";
}
I would suggest using Delegates. Have a look at the link here;
Delegates
This way you can create a method in the first Window like so;
private void WaitForResponse(object sender, RoutedEventArgs e)
{
var second = new SecondWindow();
second.ReturnTextBoxText += LoadTextBoxText;
SecondWindow.ShowDialog();
}
Then in your second Window;
internal Action<string, int> ReturnTextBoxText;
private void nextButton_Click(object sender, RoutedEventArgs e)
{
ReturnTextBoxText("Displaying In Mainwindow");
}
Finally load that response in your first Window;
private void LoadSelectedCompany(string text, int passedCompanyID)
{
contactCompanyTextBox.Text = companyName;
}
Related
I have a MainWindow, wich Contain a Frame.
My Frame switches between different xaml's using buttons on my MainWindow.
the problem I have now, is that I need to do this also from buttons within the xaml loaded within my Frame.
i tried te following:
private void Button_Click(object sender, RoutedEventArgs e)
{
MainWindow mw = new MainWindow();
Page myPage = new Page();
mw.editFramePage(myPage);
}
here is my edit editFramePage Method:
public void editFramePage(Page page)
{
myFrame.NavigationService.Navigate(page, UriKind.Relative);
}
This works, however it pops up a new MainWindow, I want this withing my current MainWindow.
Could use some help!
The problem is that you are creating a new MainWindow. You need to keep a reference to the original MainWindow and call editFramePage on that.
The default implementation skeleton of a WPF application saves the main window in App.MainWindow. To get to it, you need to use Application.Current.MainWindow.
So your function should look like this:
private void Button_Click(object sender, RoutedEventArgs e)
{
MainWindow mw = (MainWindow) Application.Current.MainWindow;
Page myPage = new Page();
mw.editFramePage(myPage);
}
Note that the cast to MainWindow is required because Application.MainWindow returns the type Window instead of the more-specific type that you need.
This is probably a fairly simple question, but I have had no luck researching it thus far. I have a child window that has a yes and no button on it. When I click no I would like a check box to become unchecked in the parent window (which is the main window of my program).
Is there anyway that I could do something like?:
//No Button
private void No_Click(object sender, RoutedEventArgs e)
{
NameOfParent.checkBox.Checked = false;
}
I've seen this question but do not think that it exactly addresses my problem.
What is the correct way to go about this?
I've been using this to open my other windows:
Parent Window - Current code:
//Open new window
private void checkBox5_Checked(object sender, RoutedEventArgs e)
{
var newWindow = new ChildWindow();
newWindow.button_no.Click += buttonNo_click;
newWindow.Show();
}
//Unchecks Checkbox 5
private void buttonNo_click(object sender, RoutedEventArgs e)
{
checkBox5.IsChecked = false;
}
Opening the child window from the parent window:
private void Button_Click_1(object sender, RoutedEventArgs e)
{
var window = new ChildWindow();
window.buttonNo.Click += buttonNo_Click;
window.Show();
}
In the code of the parent window, include this click event for the child window's no button:
private void buttonNo_Click(object sender, RoutedEventArgs e)
{
//code to uncheck the checkbox goes here
}
This turned out even simpler than the solution for Windows Forms that I've been using...and it appears to work in Windows Forms as well.
On construction of the child window, simply add a parameter that is of the type of the parent window.
Then when you are constructing your child window in the parent window code do the following (In The Parent Window Class):
ChildWindow child = new ChildWindow(this, other_param, other_param2.....);
ChildWindow.Show();
The keyword this will pass the parent window into the ChildWindow
Then you can store it into a class variable and access properties of it.
Child class constructor and parentWindow variable:
private ParentWindowType m_parentWindow = new ParentWindowType();
public ChildWindow(ParentWindowType parent, int other_param, string other_param2....)
{
m_parentWindow = parent;
}
Then in other child class methods, such as your button click handler you can access properties from the parent window:
public void ButtonClickHandler(....)
{
m_parentWindow.checkBox1.Enabled = true;
m_parentWindow.checkBox1.Checked = true;
}
This way you can store the parent window within the child window, and always have access to it.
Its nice and clean and simple this way. Ensure to make the parent window variable private in the child window class.
If made public, it would allow you to do funny things like
parentWindow.childWindow.m_parentWindow.childWindow etc......
Being a very first user in Windows Form Development I want to ask a simple question ...
I created a form(MainWindow.cs) within the solution which opens at the time of running that solution.
Latter I created a second form(SecondWindow.cs) and created a event so that it can be called from the first window by clicking a button.When the second window loded up the first window(MainWindow.cs) will be disabled.
Now I want to enable the MainWindow.cs when the second window is closed.
How to do That...
A simple solution I already have is to hide the MainWindow.cs and latter on closing the second window make a new object of first window and show it.But it is not a good way i think because there is already a object created by .net framework for first window automatically, so why we should create a new object of Mainwindow.cs .
Code Of First Window ( MainWindow.cs ) :
private void priceControllToolStripMenuItem_Click(object sender, EventArgs e)
{
SecondWindow price = new SecondWindow();
this.Enabled = false;
price.Show();
}
Code Of Second Window ( On closing SecondWindow.cs )
private void price_controll_FormClosed(object sender, FormClosedEventArgs e)
{
// what will goes here to make the MainWindow.cs to enable state
}
Use price.ShowDialog() to show second form as modal dialog. Main form will be disabled until you close second form:
private void priceControllToolStripMenuItem_Click(object sender, EventArgs e)
{
using(SecondWindow price = new SecondWindow())
price.ShowDialog();
}
You can pass the main form as an owner to the second form
private void priceControllToolStripMenuItem_Click(object sender, EventArgs e)
{
SecondWindow price = new SecondWindow() { Owner = this };
this.Enabled = false;
price.Show();
}
Then you can reference it from the second form.
private void price_controll_FormClosed(object sender, FormClosedEventArgs e)
{
Owner.Enabled = true;
}
This is my first time coding in C# and building applications in VS2010.
My task is to build a application, that has two windows. First with ListBox with several items. The second one opens on MouseDoubleClick on any item. At that point, second window opens and the title of it should be the same as ListBoxItem Name.
I have searched for a way to do this. But had no luck what so ever.
At this point I have this in code:
...
namespace WpfApplication20
{
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void MenuItem_Click(object sender, RoutedEventArgs e)
{
var newWindow = new Window1();
newWindow.Show();
}
private void seznamSporocil_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
var newWindow = new Window1();
newWindow.Show();
}
}
}
At the end this should be an Email application, like Outlook or similar.
Thank you for all the help!
Whilst Freelancers answer is somewhat right, his solution assumes that the event was and will always be triggered by that one specific ListBox. You should really use the sender parameter to get a reference to the listbox that was triggering the event though, like so:
private void seznamSporocil_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
var listBox = sender as ListBox;
var item = listBox.SelectedItem as ListBoxItem;
var newWindow = new Window1();
newWindow.Title = item.Content.ToString();
newWindow.Show();
}
Some error-checking would not hurt either, i.e. verify wheather the sender object really is a ListBox-Type, etc.
Try with following:
var newWindow = new Window1();
newWindow.Title = listBox.SelectedItem.toString();
newWindow.Show();
Link:
http://msdn.microsoft.com/en-us/library/system.windows.controls.window.title.aspx
Hope its helpful.
Can anyone here do me a favor?
I have a MainWindow with a HideButton and RetrieveButton. When I click on either one button, it will goes to another ChildWindow. My ChildWindow have a OKButton.
The question here,
How to set if else statement in C# for pseudocode below?
private void OKButton_Click(object sender, EventArgs e)
{
// pseudocode
if (HideButton in MainWindow is clicked)
{
// Perform the works
}
if(RetrieveButton in MainWindow is clicked)
{
// Perform other works
}
Thanks in advance.
By, Aeris
If you are creating the child window on Retrieve or Hide you can easily pass parameters then either via the constructor or by setting a custom property:
ChildWindow child = new ChildWindow();
child.Retrieving = true;
child.Show();