Questions on UI for WPF Forum

6 answers

136 views

binding error on styled base on TreeListViewRow with binding template

Hello,

I tried to customize style TreeListViewRow to add behavior, but i met a problem to keep the default alternating row style (row white and grey)
Indeed, I Have the default alternating style in my RadTreeListView, but if I customize only the row style, I lost the alternating row style (all the row are white)
So I decide to customize also the alternating row style, based on the row style.

<Style

x:Key="rowStyle"

BasedOn="{StaticResource {x:Type telerik:TreeListViewRow}}"

TargetType="{x:Type telerik:TreeListViewRow}">

<Style.Setters>

<EventSetter

Event="MouseDoubleClick"

Handler="HandleRowDoubleClick" />

</Style.Setters>

</Style>

<Style

x:Key="alternateRowStyle"

BasedOn="{StaticResource rowStyle}"

TargetType="{x:Type telerik:TreeListViewRow}">

</Style>

But with this, I lost also the alternating row background color

I set the background color of the style with bind of the AlternateRowBackground of the control (to keep inheritance).

<Style

x:Key="alternateRowStyle"

BasedOn="{StaticResource rowStyle}"

TargetType="{x:Type telerik:TreeListViewRow}">

<Style.Setters>

<Setter

Property="Background"

Value="{Binding AlternateRowBackground, Source={RelativeSource TemplatedParent}}" />

</Style.Setters>

</Style>

With this, it's work, but I have binding error on each alternate line : BindingExpression path error: 'AlternateRowBackground' property not found on 'object' ''RelativeSource' (HashCode=46024298)'. BindingExpression:Path=AlternateRowBackground; DataItem='RelativeSource' (HashCode=46024298); target element is 'TreeListViewRow' (Name=''); target property is 'Background' (type 'Brush')

I undestand If the color work, it's because when binding fail, telerik engine seems to put the default value, because Value={Binding Foo or whatever produce the same result.

So I think it's because the AlternateRowBackground property isn't set in my RadTreeListView, I do this with yellow for test, but same error! (binding error, and the alternate background color is grey). I don't understand, can you explain this ?

Thanks,

Sincerly

Gourdon Julien

PS : sorry for my english, I'm french

TreeListView

answered on 04 Nov 2013

3 answers

101 views

Do not call EndEdit on leaving row

Hello,

how can I avoid that the EndEdit Method of my entity is raised when leaving/switching the row.
I changed the ActionOnLostFocus to "None", but this was not the solution.

Thank you,
Manuel

GridView

answered on 01 Nov 2013

1 answer

162 views

Connection template

Hi guys I'm trying to draw a diagram like this one: http://www.wu.ac.at/ic/erp/webtrainer/dwh_webtrainer/exercise/20/20d-l-1.gif

Actually the only thing I really can't figure out is how to customize the connection template in order to draw an orthogonal line on top of a link (see the connection from the grayed node to the "driver" node).

The presence (or absence) of the line should be driven by a property in my model (the entire diagram is data bound to a graph source).

Thank you

Diagram

answered on 01 Nov 2013

1 answer

155 views

ItemsOptionListType - Moved my Cheese

I just installed the latest version of WPF controls (2013.3.1016.40) and my TreeView no longer registers this property. Can you tell me what the new alternative is for this property? Thanks.

tv.ItemsOptionListType = OptionListType.CheckList;

TreeView

answered on 01 Nov 2013

1 answer

164 views

Gridview ViewModel Binding

Hello, I would like to bind the gridview to viewmodels. I was thinking I'd have a TableViewmodel, which contains a collection of ColumnViewmodels and RowViewmodels, and finally CelViewModels. How would I go about doing this?

Thanks,
Scott

GridView

answered on 01 Nov 2013

1 answer

155 views

Setting the RadComboBoxItem.Template breaks RadComboBox.DisplayMemeberPath

I already submitted a support ticket, but I just wanted to post here.

If the Template property of a RadComboBoxItem is set, then the DisplayMemberPath property of the RadComboBox will no longer display on each item in the drop down. The currently selected item will still appear correctly.

The workaround is to explicitly set the ItemTemplate property on the RadComboBox.

ComboBox

answered on 01 Nov 2013

1 answer

155 views

how to add amovable vertical line / slider/ anything parallel to y axis of line series chart in wpf

Hi,

I have a need to have a movable slider on line charts. The way it should work is as follows:

1. Slider/Cursor should be parallel to Y-axis i.e. vertical axis

2. When user moves this slider, corresponding/intersecting Y values on all graphs show up in labels just like a stock ticker chart.
3 the value of intersecting line should be displayed in label

Thanks,
avinash

Chart

answered on 01 Nov 2013

2 answers

214 views

Combine stack and cluster bars

Hello,

I wonder if it is possible to combine stack and cluster bars to have something like the image that I am attaching.

So far I can create Bar series with combine mode stack or cluster but not both.

I am creating the series in the code behind like this:

BarSeries barSer = new BarSeries();

barSer.ShowLabels = true;

barSer.CombineMode = ChartSeriesCombineMode.Stack;

// or

BarSeries barSer = new BarSeries();

barSer.ShowLabels = true;

barSer.CombineMode = ChartSeriesCombineMode.Cluster;

foreach (DataRow dr in dtData.Rows)

{

barSer.DataPoints.Add(new CategoricalDataPoint() { Category = dr["Name"], Label = string.Format("{0:N}", dr["Value"]), Value = double.Parse(dr["Value"].ToString()) });

}

Thanks in advance.

Alberto

Chart

answered on 31 Oct 2013

9 answers

690 views

trying to change theme color at runtime without success

Hi,

I have in my App a RadScheduleView. Its theme is set to Windows8Theme in xaml :

<telerik:RadScheduleView x:Name="ScheduleView"

MinTimeRulerExtent="400"

MaxTimeRulerExtent="1920"

AppointmentNavigationButtonsVisibility="Never"

ToolTipTemplate="{StaticResource AppointmentToolTipTemplate}"

telerik:StyleManager.Theme="Windows8"

GroupHeaderContentTemplateSelector="{StaticResource GroupHeaderContentTemplateSelector}"/>



this theme is definitive, but I would like to be able to change the theme's AccentColor at runtime, so I wrote a method to do this:




public static void ChangeTheme(ColorTheme theme)
{
    var app = (App)Application.Current;
    if (theme == app.CurrentTheme) return;
     
    app.Resources.MergedDictionaries.Clear();
    AddResourceDictionary("resources/Common.xaml");
    AddResourceDictionary("resources/GeneralResources.xaml");
    AddResourceDictionary("resources/MenuResources.xaml");
    AddResourceDictionary("resources/DataGridResources.xaml");
    AddResourceDictionary("resources/DatePickerResources.xaml");
 
    app.CurrentTheme = theme;
    try { AddResourceDictionary(string.Format(CultureInfo.InvariantCulture, "themes/{0}.xaml", theme)); }
    catch { AddResourceDictionary("themes/Default.xaml"); }
 
    Windows8Palette.Palette.AccentColor = (Color)Application.Current.Resources["ThemeColor"]; // pour le calendrier
 
}
 
private static void AddResourceDictionary(string source)
{
    var resourceDictionary = Application.LoadComponent(new Uri(source, UriKind.Relative)) as ResourceDictionary;
    Application.Current.Resources.MergedDictionaries.Add(resourceDictionary);
}



My issue is quite simple: the ScheduleView's color is always exactly one color late. i.e.:

let's say I have 3 theme colors : green, red, blue. Blue is the color at the beginning. I call the method to set the color to red, it stays blue. I call the method to set green, it becomes red, I call the color to set blue again, it becomes green, and so on...



can anybody tell me what I am doing wrong? I am at a complete lost as to how on earth this behaviour is possible...



Edit: I forgot a potentially usefull piece of information: this used to work with earlier versions of the telerik libraries (Q3 2012 as far as I remember). At the time, I used Windows8Colors.PaletteInstance, though, as it was not yet flagged as Obsolete.

General Discussions

answered on 31 Oct 2013

15 answers

287 views

DataForm and DataTable

I am trying to bind the DataForm ItemsSource to a DataTable. Initially the DataForm is populated, but if I try to navigate through the records, I get an error.

I have spent past hour searching for a solution, and I could not find any mention of this issue. DataForm works fine if binded to an ObservableCollection of business objects. But in this case I need it binded to a DataTable, and I cant seem to find a way to get it working.

IDE: VS2010
.Net Version: 4.0
Telerik Version: 2011.3.1220.40

I have created a sample project that recreates the same issue. The error that I receive when navigating through the records is:

The type 'DataRowView' does not contain a public property named 'DateTime'.

Parameter name: propertyName

<Window xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" x:Class="Testing.DataForm.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="MainWindow" Height="350" Width="525">

<Grid>

<telerik:RadDataForm Name="dataForm"/>

</Grid>

</Window>

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using System.Data;

namespace Testing.DataForm

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

GenerateSomeData();

}

private void GenerateSomeData()

{

#region Data Generator

DataTable baseTable = new DataTable();

baseTable.Columns.Add("DateTime", typeof(DateTime));

baseTable.Columns.Add("Value", typeof(decimal));

DateTime date = new DateTime(DateTime.Now.Year, 11, 1);

TimeSpan span = date.AddMonths(1).AddDays(-1) - date;

int numDays = span.Days;

int randHigh = 65;

int randLow = 0;

#region RANDOM DATA GENERATOR

Random rand = new Random();

int calculatedNumHours = 24 * numDays;

for (int hour = 1; hour <= calculatedNumHours; hour++)

{

baseTable.Rows.Add(new object[]

{

date.AddHours(hour).AddSeconds(-1),

rand.NextDouble() * ((randHigh - randLow) + randLow)

});

}

#endregion

dataForm.ItemsSource = baseTable.DefaultView;

#endregion

}

DataForm

answered on 31 Oct 2013