How do you display a custom UserControl
as a dialog in C#/WPF (.NET 3.5)?
7 Answers
Place it in a Window and call Window.ShowDialog. (Also, add references to: PresentationCore, WindowsBase and PresentationFramework if you have not already done so.)
private void Button1_Click(object sender, EventArgs e)
{
Window window = new Window
{
Title = "My User Control Dialog",
Content = new MyUserControl()
};
window.ShowDialog();
}
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20I also found that setting the SizeToContent = SizeToContent.WidthAndheight and ResizeMode = ResizeMode.NoResize were helpful so it lets the user control define the size. Commented Aug 11, 2009 at 18:49
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4How can we use
this.Close()
function to this UserControl Dialog? Commented Nov 6, 2013 at 11:18 -
4private void btnClose_Click(object sender, RoutedEventArgs e) { var parent = this.Parent as Window; if (parent != null) { parent.DialogResult = true; parent.Close(); } } Commented Aug 22, 2016 at 7:08
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1If you want the dialog window to come to the top and 'flash' when other window is clicked, set the owner.
Owner = Application.Current.MainWindow
Commented May 30, 2019 at 14:51 -
What to do if I want to display multiple user controls simultaneously?– NoNameCommented Jul 20, 2022 at 14:48
Window window = new Window
{
Title = "My User Control Dialog",
Content = new OpenDialog(),
SizeToContent = SizeToContent.WidthAndHeight,
ResizeMode = ResizeMode.NoResize
};
window.ShowDialog();
Has worked like a magic for me. Can it be made as a modal dialog?
Ans : ShowDialog it self make it as Modal Dialog.. ...
As far as I know you can't do that. If you want to show it in a dialog, that's perfectly fine, just create a new Window that only contains your UserControl, and call ShowDialog() after you create an instance of that Window.
EDIT:
The UserControl
class doesn't contain a method ShowDialog, so what you're trying to do is in fact not possible.
This, however, is:
private void Button_Click(object sender, RoutedEventArgs e){
new ContainerWindow().ShowDialog();
}
namespace System.Window.Form
{
public static class Ext
{
public static DialogResult ShowDialog(this UserControl @this, string title)
{
Window wind = new Window() { Title = title, Content = @this };
return wind.ShowDialog();
}
}
}
The use of it maybe as simple as UserControlInstance.ShowDialog(). A better customized implementation would be by extending the Window class and customizing it using the the designer and code to get any functionality.
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Nice Example, just in case of WPF (System.Windows.Window.ShowDialog()) Return type should be bool? (Nullable Type) Commented Aug 22, 2016 at 5:56
I know this is for .net 3.5, but here is a workable solution for .net 2.0
MyUserControl myUserControl= new MyUserControl();
Form window = new Form
{
Text = "My User Control",
TopLevel = true,
FormBorderStyle = FormBorderStyle.Fixed3D, //Disables user resizing
MaximizeBox = false,
MinimizeBox = false,
ClientSize = myUserControl.Size //size the form to fit the content
};
window.Controls.Add(myUserControl);
myUserControl.Anchor = AnchorStyles.Top | AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Right;
window.ShowDialog();
You can also use MaterialDesignThemes.Wpf (downloadable on NuGet, .NET 4.5+). Then you can simply do:
{
var view = new YourUserControl();
var result = await DialogHost.Show(view, "RootDialog", ClosingEventHandler);
}
private void ClosingEventHandler(object sender, DialogClosingEventArgs eventArgs)
{ } //Handle Closing here
If the answer by 'sixlettervariables' is modified as so, it works
private void button1_Click ( object sender, RoutedEventArgs e )
{
Window window = new Window
{
Title = "My User Control Dialog",
Content = new UserControl ( ),
Height = 200, // just added to have a smaller control (Window)
Width = 240
};
window.ShowDialog ( );
}
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14You forgot
Background = Brushes.Purple
; it won't work without that. Commented May 29, 2013 at 15:36