Questions on UI for WPF Forum

4 answers

154 views

[Solved] DataTrigger in a SelectionBoxTemplate?

I was able to bind a model's text and tooltip to the SelectionBoxTemplate. However, sometimes the tooltip is empty and sometimes it is populated.
However, without a datatrigger in place, even on the empty tooltips, I see an empty tooltip window popup which is a bit of annoyance. Any possible way to fix this?

ComboBox

answered on 02 Jan 2020

8 answers

231 views

Drop shape into container shape

Hi,

I am trying to drop shape into a container shape, but the shape is not displaying inside the container. Could anyone help me solve it? Here is my code.

EventManager.RegisterClassHandler(typeof(RadDiagramContainerShape), RadDiagramShape.DropEvent, new System.Windows.DragEventHandler(OnDrop));

private void OnDrop(object sender, System.Windows.DragEventArgs e)

{

e.Handled = true;

if ((e.Data as DataObject)?.GetData(typeof(DragObject)) is DragObject dragObject)

{

var itemBase = (ActivityBase)Activator.CreateInstance(dragObject.ContentType);

var p = e.GetPosition(MainDiagram);

var shape= createDiagramShape(itemBase);

RadDiagramContainerShape target = (sender as RadDiagramContainerShape);

target.Items.Add(shape);

}

private RadDiagramShape createDiagramShape(ActivityBase activity)

{

var shape = new RadDiagramShape

{

Content = activity,

BorderThickness = new Thickness(1),

UseGlidingConnector = true,

HorizontalContentAlignment = HorizontalAlignment.Stretch,

VerticalContentAlignment = VerticalAlignment.Stretch,

DataContext = activity,

UseDefaultConnectors = false,

IsRotationEnabled = false,

Background = new SolidColorBrush(Color.FromArgb(255, 255, 255, 255)),

GlidingStyle = GlidingStyle.Rectangle

};

var outconnector = new InOutConnector

{

Offset = new Point(1, 0.2),

Direction = eDirection.drOut,

Name = "out" + DateTime.Now.Millisecond

};

shape.Connectors.Add(outconnector);

var inconnector = new InOutConnector

{

Offset = new Point(0, 0.2),

Direction = eDirection.drIn,

Name = "in" + DateTime.Now.Millisecond,

};

shape.Connectors.Add(inconnector);

return shape;

}

The following function to drop shape inside the diagram works.

private void OnDropShape(object sender, DragEventArgs e)

{

e.Handled = true;

if ((e.Data as DataObject)?.GetData(typeof(DragObject)) is DragObject dragObject)

{

var itemBase = (ActivityBase) Activator.CreateInstance(dragObject.ContentType);

var p = e.GetPosition(MainDiagram);

var shape = createDiagramShape(itemBase);

MainDiagram.AddShape(shape, MainDiagram.GetTransformedPoint(p));

_mainViewModel.ShapeCollection = MainDiagram.Shapes;

_mainViewModel.SelectedActivity = calendar.DataContext as ActivityBase;

}

Thanks,

Rahul

Diagram

answered on 02 Jan 2020

1 answer

114 views

[Solved] RadWizard AllowFinish ignored if there is only one wizardpage

If there is only one wizardpage in the WizardPages collection, the AllowFinish property is ignored completely and the Finish button is enabled even if set to false directly or using a binding.

Using the latest version of UI for WPF.

Wizard

answered on 01 Jan 2020

3 answers

395 views

Server side paging, sorting, filtering

I tried looking at the WPF GridView example for server side paging/sorting/filtering and it failed with an error. However I looked at the code and you are simply using entity framework to do all the work.

Are there any examples where I can use a different ORM like Ormlite? We don't use entity framework and frankly don't want to.

The only other solution for us would be to switch to using something like Kendo because then it is much easier in the web.

GridView

answered on 01 Jan 2020

13 answers

4.0K+ views

[Solved] How to create a Close button in a User Control

Have a User Control that is called when a button "about" is pressed.

The UC works. Want to add a "Close" button that will close the window so it won't get orphaned later.

I could use the "IsVisible = Visibility.Collapsed;" which works but it is not really gone. The UC has to RadListboxes which collects different data in each box. When I use the "IsVisible = Visibility.Collapsed;" the box disappears. When click on the "About" button it reappears with previous data. I prefer to make it truly close/destroyed.

Is this possible and if so how? please.

What code do you need the XAML or the .CS?

ListBox

answered on 30 Dec 2019

9 answers

1.3K+ views

Setting Header Row Height

Hello Telerik Team,

I wanted to reduce the height of the header row but cannot figure out how. Setting the RowHeight property works only for the rows and not for the header row.

Is there a way to reduce the height of the header row?

Thanks,
Kumar

GridView

answered on 30 Dec 2019

4 answers

1.1K+ views

[Solved] how to create row number column and pagination

hello

I am trying to implement a Grid View with row number column and pagination.That is, the row number can also be changed when the page is changed

but the code I wrote is that the row number column on each page is only 1 to 10. And by going to the next page the row number starts again from 1 and does not increase to 11 and more.

this is my cs code for row number:

public override FrameworkElement CreateCellElement(Telerik.Windows.Controls.GridView.GridViewCell cell, object dataItem)

{
TextBlock textBlock = cell.Content as TextBlock;

if (textBlock == null)
{
textBlock = new TextBlock();
}
textBlock.Text = string.Format("{0}", this.DataControl.Items.IndexOf(dataItem) + 1);
return textBlock;
}

and xaml code:

<telerik:RadDataPager DisplayMode="all" PageSize="10" Source="{Binding Items, ElementName=RadGridView}" />

also i need a label that represents the total number of Grid View rows. The value of this label must be updated by applying a filter or searching.

but my code always represents total number of Grid View rows and does not change with filtering.

Thanks!

Sara.

GridView

answered on 28 Dec 2019

1 answer

316 views

[Solved] RadListbox copy selecteditem

Have a RadListbox, in xaml have set (SelectionMode="Multiple").

Want the user able to copy a selected item(s) and paste it anywhere (text file, excel, etc.) having issue finding topics in forum that helps me complete the operation of "copy".

Is there a method to do this?

ListBox

answered on 26 Dec 2019

1 answer

130 views

Data Virtualization with live data?

I found a post from 2014 where telerik rep is stating that virtual scrolling will not work with dynamic data. is this still the case?

https://www.telerik.com/forums/virtual-scrolling-doesn't-work-with-dynamic-data

Chart

answered on 26 Dec 2019

10 answers

3.8K+ views

[Solved] DateTimePicker: Select Month and Day without Year

I'm building a rules engine that allows date constraints. I want to be able to use a datetime picker to select the month and day, but I don't want to show the year. Is this possible with your control?

Jason

DateTimePicker

answered on 26 Dec 2019