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I've just written a new WPF UserControl. Now I want to try it out. What's the easiest program I can write to run it?
So far I have
static class Program
{
static void Main(string[] args)
{
var grid = new CorrelationsGrid();
}
}
But the application runs and closes immediately without showing my control on screen. Help!
In Visual Studio
Select File -> New -> Project...
Select WPF application.
Then add your user control to the project.
Finally in the XAML, add your UserControl to the MainWindow.xaml and it will handle all of the displaying for you.
<Window x:Class="TestProject.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:myuct="clr-namespace:namespaceofyourusercontrol"
Title="MainWindow" Height="350" Width="525">
<Grid>
<myuct:myusercontrol/>
</Grid>
Create a new WPF application, and put it in the Grid in the MainWindow.xaml. Of course this assumes "easiest" to mean "least hassle", rather than "minimalist".
The easiest way should be this.
Once you written your control and you built it, the control will be part of your 'Toolbox', that means a window where all the available controls are visible and grouped.
You can use Visual Studio to add your control, from the 'Toolbox' window, to your MainWindow, in an empty WPF project.
This will add few lines of code in your MainWindow.xaml file, about your control.
Now you can customize the properties of your user control, like any other control.
Related
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I want to create a WPF App in VS which should have various features (no serperate applications!).
The MainWindow should containt several Icon's (like App Icon's on Smartphone) which represents each of my features. So the MainWindow should be as an overview of my features. How do I need to realize it?
Which toolbar object represents an Icon? (Button?)
If I click on the Icon (Button?) the new feature should be showed as fullscreen (like on a Smartphone by clicking/starting an App). Which feature of WPF should I use to show the Page/Window of the Feature? If I close the feature the MainWindow should be showed again. I would be glad about a code example
Thanks
This question is likely too broad to get you the answers you are looking for, but a good place to start is with the Window class.
Once you create your buttons, you can spawn a new Window for your distinct feature. The Window.ShowDialog method will allow the new feature to remain active until it is closed. Setting the Window.Owner property will allow the new feature to return control to MainWindow.
I'd recommend trying some of these features out then coming back with specific questions you might have.
MainWindow.xaml
<Window x:class="MainWindow">
<!-- ... -->
<Button Click="Feature1_Click" Content="Open Feature 1"/>
<Button Click="Feature2_Click" Content="Open Feature 2"/>
<!-- ... -->
</Window>
MainWindow.xaml.cs
public class MainWindow : Window
{
//...
private void Feature1_Click(object sender, RoutedEventArgs e)
{
new Feature1Window
{
Owner = this
}.ShowDialog();
}
private void Feature2_Click(object sender, RoutedEventArgs e)
{
new Feature2Window
{
Owner = this
}.ShowDialog();
}
// ...
}
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I have a window that displays a list of Employees. When I select one Employee and click on a button, another window should pop up displaying the details of the selected Employee. But since the new window creates a new instance of my View Model, it does not know which Employee I clicked. I know how to display the details in the same window using a Datagrid or listview but now I am trying to learn navigation in WPF and I really want to know how data is transferred in WPF between different windows. Right now I am using a single View Model for both the windows.
Inside the constructor of both the windows, I wrote this.DataContext = new EmployeeViewModel();
There are two patterns with MVVM. View first and VM first. You are using View first and are finding the issues with it.
VM first is more common and means that the VMs are in charge, and windows and views are just created to wrap the VMs. See my previous answer to see how to open a new Window for a VM in a VM first world.
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The utility I'm building will have several forms that are very similar to each other in appearance (the code behind the forms will differ, so I don't want to use one form for all of it, to avoid a big jumbled up mess). Rather than recreate each form one at a time, I'd like to "inherit" from the existing form. Is there a canonical way of doing this with Winforms?
If not, I'll select all of the controls on the form and paste them into the new ones...
If i get you, you want to copy all the controls from one form to another form.
There are two ways i know
1.) Create a docked panel on the main form and add all the controls to the panel and when you want to paste you use.
private void Form2_Load(object sender, EventArgs e)
{
Form1 form = new Form1();
this.Controls.Add(form.panel1);
}
2.) Use Inheritance. After Creating the Controls in the main form, in the second form you use
public partial class Form2 : Form1
{
public Form2()
{
InitializeComponent();
}
}
This will automatically copy all the controls to the new form
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Could anyone explain me how the compiler knows to perform appropriate method when we select RadioButtons in this example ?
It's hard to say for sure what you're asking. I think you're asking how the system knows that it should execute the iconType_CheckChanged method when one of the icon radio buttons is clicked, and how it knows that, for example, the asteriskRadioButton changed.
The answer is in two parts. First, in creating the program in Windows Forms, you hooked up the CheckChanged event handler for each of the radio buttons. So the asteriskRadioButton CheckChanged method contains the value iconType_CheckChanged. That information is added to the partial class that you don't usually see. It's in your Form.Designer.cs file in the InitializeComponent method. It looks something like:
this.asteriskRadioButton.CheckChanged += iconType_CheckChanged
You don't typically see the Form.Designer.cs file. To view it, expand the form node in the Visual Studio Solution Explorer and you'll see the file listed:
The second part of the answer is that when you click the radio button (or when some code changes the state of the radio button), the underlying control machinery calls iconType_CheckChanged, passing a reference to the control that triggered the event in the Sender argument.
This question already has answers here:
How do I prevent a user from resizing a window in my C# application?
(6 answers)
Closed 9 years ago.
How can I make my application run only with the window maximized?
I am working on a project where I need the window to always be maximized or else the interior designs begin to clump together (please do not comment on the formatting of this app). I understand how to easy it is to set the WindowState to "Maximized" but I need to get rid of the users ability to re-size the application (except the fully minimized option).
Add the following attributes.
ResizeMode="CanMinimize" WindowState="Maximized"
Hope that helps.
More information on the ResizeMode property
You are looking for ResizeMode:
<Window ...
ResizeMode="CanMinimize"
WindowState="Maximized">