Questions on UI for WPF Forum

6 answers

105 views

Disallow column moves from one ColumnGroup to another

We are using Telerik WPF contorls for the desktop application (2013 Q3 NET).

We have few column groups in the grid and columns are sorted to them. We need to be able to prevent the user from moving the column from one ColumnGroup to the other. They should however be able to reorder columns as long as the column remains in the original ColumnGroup.

Thank you!

GridView

answered on 11 Mar 2016

3 answers

134 views

Pagination needs QueryableDomainServiceCollectionView. How to obtain it?

Dear Telerik Support
I just started using your controls for WPF, to see if it suits the needs of our company
Starting by doing basic examples, I stumbled upon the RadGridView pagination
I am trying to use this example
http://demos.telerik.com/silverlight/#DomainDataSource/MVVM and
and this documentation
http://docs.telerik.com/devtools/wpf/controls/raddatapager/getting-started#adding-raddatapager
But it seems my grid wont page if I dont use this

   this.view = new QueryableDomainServiceCollectionView<Customer>(context, getCustomersQuery);

   this.view.PageSize = 10;

thus attributing the PageSize to it.
right now I use a ObservableCollection<Entity> List.

So my question is: Where how can I use the above mentioned class (QueryableDomainServiceCollectionView) to support my need of pagination?
I don't want to paginate it manually, by using the Unbound mode. and I would prefer to avoid that all data goes into memory

I wish I could attach a zip file of my project. but since I cannot, here is the code (note: you must install the PropertyChanged.Fody nugget in order to run it):

XAML

XAML.CS

using System.Windows;
namespace TelerikWpfApp1
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
ViewModel vm = null;
public MainWindow()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
vm = grid.DataContext as ViewModel;
vm.Load();
}
}

VIEWMODEL.cs

using PropertyChanged;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
namespace TelerikWpfApp1
{
[ImplementPropertyChanged]
public class ViewModel
{
public ObservableCollection<Entity> List { get; set; }
public void Load()
{
List = GetList().ToObservableCollection();
}
List<Entity> GetList()
{
List<Entity> list = new List<Entity>();
for (int i = 0; i < 100; i++)
{
list.Add(new Entity() { comment = "dasd", id = 1, name = "fefe" });
list.Add(new Entity() { comment = "xxcv", id = 2, name = "dewd" });
list.Add(new Entity() { comment = "zzz", id = 3, name = "jjj" });
}
return list;
}

//public void Save(Entity item, string comment)
//{
// if (item.comment != comment)
// {
// //controller.Save(); }
// }
//}
}
public class Entity
{
public int id { get; set; }
public string name { get; set; }
public string comment { get; set; }
public DateTime StartDate { get; set; }
public DateTime EndDate { get; set; }
}
public static class ListExtensions
{
public static ObservableCollection<T> ToObservableCollection<T>(this IEnumerable<T> items)
{
var c = new ObservableCollection<T>();
foreach (var item in items)
{
c.Add(item);
}
return c;
}
}
}

Thank you!!!!

GridView

answered on 11 Mar 2016

3 answers

327 views

TimeSpanPicker - First Look

I am working through your documentation and am trying to get the 2nd TimeSpanPicker working.

<telerik:RadTimeSpanPicker x:Name="Duration" Value="{Binding SelectedDuration, Mode=TwoWay}"...

My implementation (different source & different name):

<telerik:RadTimeSpanPicker

Grid.Row="1"

x:Name="Duration"

Value="{Binding SelectedDuration, Mode=TwoWay}"

StringFormat="hh\:mm' hours'"

TimeSpanWatermarkContent="Select duration...">

<telerik:RadTimeSpanPicker.TimeSpanComponents>

<wpf:TimeSpanDurationComponent

ItemsSource="{Binding Durations, Mode=OneWayToSource}"

Header="Minutes"/>

</telerik:RadTimeSpanPicker.TimeSpanComponents>

</telerik:RadTimeSpanPicker>

I added the DurationTimeSpanComponent (wpf.TimeSpanDurationComponent) and have the Durations collection on my MV.

However, I get this error during runtime:

System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=Durations; DataItem=null; target element is 'TimeSpanDurationComponent' (HashCode=46098163); target property is 'ItemsSource' (type 'IEnumerable')

Your example includes that control is a container. Is that important?

What I see is that you include a namespace that doesn't seem to be part of my install. When I attempt to set this xmlns I don't have it as an option. And, when I go to add a reference this is not part listed. Is the documentation bad? Is this QuickStart namespace supposed to be part of most common implementations?

xmlns:telerikQuickStart="clr-namespace:Telerik.Windows.Controls.QuickStart;assembly=QuickStart.Common"

TimeSpanPicker

answered on 11 Mar 2016

3 answers

68 views

Acessing TextBox (within GroupFooterTemplate) parent from codebehind

Hello,

I'm using a RadGridView, and in it's footer, a textbox element inside a GroupFooterTemplate. Can I, from codebehind, in a TextBox event (e.g. TextChanged) somehow access the GridView that contains my TextBox? When I check the sender's properties, the parent is null.

Also, can I somehow access the group information and the other groups' TextBoxes?

Any help would be appreciated.

GridView

answered on 10 Mar 2016

1 answer

47 views

QueryableDomainServiceCollectionView

Dear Telerik Support

I just started using your controls for WPF, to see if it suits the needs of our company

Starting by doing basic examples, I stumbled upon the RadGridView pagination

I am trying to use this example

http://demos.telerik.com/silverlight/#DomainDataSource/MVVM and

and this documentation

http://docs.telerik.com/devtools/wpf/controls/raddatapager/getting-started#adding-raddatapager

But it seems my grid wont page if I dont use this

   this.view = new QueryableDomainServiceCollectionView<Customer>(context, getCustomersQuery);

   this.view.PageSize = 10;

thus attributing the PageSize to it.

right now I use a ObservableCollection<Entity> List.

So my question is: Where how can I use the above mentioned class (QueryableDomainServiceCollectionView) to support my need of pagination?

I don't want to paginate it manually, by using the Unbound mode. and I would prefer to avoid that all data goes into memory

I will attach the code of my sample project here. Not you must install the PropertyChanged.Fody in order to run it.

GridView

answered on 10 Mar 2016

2 answers

145 views

RadGridView export to Excel creates empty file

<t:RadGridView x:Name="Logs">

<t:RadGridView.Columns>

<t:GridViewDataColumn CellTemplateSelector="{StaticResource IconTemplateSelector}" />

<t:GridViewDataColumn DataMemberBinding="{Binding LogLevel,Mode=OneWay}" Header="Level"

CellStyle="{StaticResource PaddedCell}"/>

<t:GridViewDataColumn DataMemberBinding="{Binding LogID,Mode=OneWay}"

Header="LogID"/>

<t:GridViewDataColumn DataMemberBinding="{Binding MachineDateTime,Mode=OneWay}"

Header="Machine Time"

CellStyle="{StaticResource PaddedCell}"/>

<t:GridViewDataColumn DataMemberBinding="{Binding Occured, Mode=OneWay}"

Header="Occured"

CellStyleSelector="{StaticResource ColorSelector}"/>

<t:GridViewDataColumn DataMemberBinding="{Binding System,Mode=OneWay}"

Header="System"