Questions on UI for WPF Forum

2 answers

117 views

Adding a Column and Aggregate Programatically

I am adding columns to a grid programmatically as the number of columns can vary. Additionally I want to sum the column values in the column footer. The following code is used to achieve this;

Private Sub AddContractYearColumns()

Dim sPeriod As String = String.Empty

Dim iIndex As Integer = 0

Try

Dim Years = From Yrs In gdcRAD.vw_ProjectYears Select Yrs.Year

For Each Yr As String In Years

If Yr.ToInteger >= Year(Date.Today) Then

iIndex += 1

sPeriod = "Period" & iIndex.ToString("00")

Dim column As New GridViewDataColumn()

With column

.Header = Yr

.UniqueName = Yr

.DataMemberBinding = New Binding(sPeriod)

.DataFormatString = "0.00"

.TextAlignment = TextAlignment.Right

End With

gvContractYrs.Columns.Add(column)

Dim f As New Telerik.Windows.Data.SumFunction

f.SourceField = sPeriod

gvContractYrs.Columns(Yr).AggregateFunctions.Add(f)

End If

Next

Catch ex As Exception

Throw New RadException("Add Contract Year Columns", ex.Message, ex.InnerException)

End Try

End Sub

This creates columns with headings such as "2014", "2015", etc that are bound to "Period01", "Period02", etc.

The following code is then used to to obtain and bind the data to the grid;

Private Sub DisplayAvailableEquipYrs()

Try

Dim EquipList = (From Equipment In gdcRAD.usp_YearsAvailable(Date.Today, False, False) Select Equipment).ToList

gvContractYrs.ItemsSource = EquipList

Catch ex As Exception

Throw New RadException("Display Available Equipment Years", ex.Message, ex.InnerException)

End Try

End Sub

The EquipList is populated correctly with a nullable Double data type being returned for "Period01", "Period02", etc however I get the error "No generic method 'Sum' on type 'System.Linq.Enumerable' is compatible with the supplied type arguments and arguments." when I attempt to bind the EquipList object to the ItemsSource.

Could the nullable data type be causing the problem?

GridView

answered on 23 Jan 2014

1 answer

87 views

Implement Copy in Grid Menu

In the grid, is there a way to implement the CTRL + C function via a Menu click. I want when the user right clicks the grid and selects Copy to copy the selected records like it would do if the user presses CTRL + C

GridView

answered on 23 Jan 2014

2 answers

122 views

Editable sortable treeview

Hi,

I implemented a sortable collection to use like itemssource for my RadTreeview. Each item is editable and when item is validated the sortable collection sort well the item. Normal behavior would be

1 User start edit the item

2 User enter Enter key

3 Item is validated

4 Item is sorted in sortablecollection and RadTreeView is updated. IsInEditMode is false.

All works fine except if i decide to bind the IsInEditMode with a property of my model. When the IsInEditMode is binding (Mode TwoWay) the user must press twice Enter to complete the edit.

I join a sample here.

If you launch the sample and try to rename the 7ABC item in 0AAA, the item is well move to first position but stay in editmode. If you comment the following line in MainWindow.xaml

<Setter Property="IsInEditMode" Value="{Binding IsInEditMode,Mode=TwoWay}"/>

the item is well move and exit from editmode when press Enter.

I don't understand why the binding on IsInEditMode interfer with edition.

Regards

Luc

TreeView

answered on 22 Jan 2014

3 answers

197 views

Problems in loading values in RadSlider

Hi Telerik Teams,

Please help me on one issue with loading values slider in Slider. When i load the slider with DoubleCollection I get an error .The project is done in Visual studio 2008. I lost lots of time for troubleshooting.But i cant solve this error. Please help me.

The error is "Specified element is already the logical child of another element. Disconnect it first. in using canvas".

I mention below the code that implemented in the project for loading the Slider.
----------------------------------------------------------------------------------------------------------------------------------------------

ParentCanvas = New Canvas()
ParentCanvas.ClipToBounds = True
ParentCanvas.Width = 1200
ParentCanvas.Height = 800

Dim ValText As String
Dim Valcode As Integer
Dim tickcollection As New DoubleCollection()
Dim canvas30 As New Canvas()
If canvas30 IsNot Nothing Then
canvas30.Children.Remove(RadSlider1)
End If
For i As Integer = 0 To alItemSource.Count
Dim pInfo As TWBS.UI.B1.DashBoards.PlotInfo = alItemSource(i)
ValText = pInfo.LegendLabel
Dim dictionary As New Dictionary(Of String, Integer)
dictionary.Add(ValText, i)
Valcode = dictionary.Item(ValText)
tickcollection.Add(Valcode)
RadSlider1.Ticks = tickcollection
RadSlider1.TickPlacement = Telerik.Windows.Controls.TickPlacement.BottomRight

canvas30.Children.Add(RadSlider1)
ParentCanvas.Children.Add(canvas30)
Next
The Bolded code is the place where i get the error.Its urgent.please help me.......

Slider

answered on 22 Jan 2014

1 answer

136 views

How to create a custom Command

I want to implement my custom Command. So, I derived from IImageCommand and implement execute Method. And then, call my command from XAML code. But, when I run my application nothing is happened.
This is an example of what I have implemented :

public class MyCustomCommand : IImageCommand

{

public Telerik.Windows.Media.Imaging.RadBitmap Execute(Telerik.Windows.Media.Imaging.RadBitmap source, object context)

{

//My code here ....

}

and in my XAML file :

<telerik:ImageToolItem ImageKey="Custom" Text="Custom Command" Command="{Binding MyCustomCommand}"/>

Thank you very much for your responses. And it will be very helpful if there is an example showing how to create custom commands.

My warmest regards.
Bacem

ImageEditor

answered on 22 Jan 2014

1 answer

285 views

ChartSelectionBehavior SelectionChanged

A few months ago I created a boxplot chart using a slightly modified version of the method outlined here: http://www.telerik.com/help/wpf/radchart-howto-create-scatter-errorbars-and-boxplot-series.html

I added the following to the chart's XAML:

<telerik:RadCartesianChart.Behaviors>

<telerik:ChartPanAndZoomBehavior ZoomMode="Vertical" PanMode="Vertical"/>

<telerik:ChartSelectionBehavior DataPointSelectionMode="Single" />

<telerik:ChartSelectionBehavior SelectionChanged="SelectionChanged" />

</telerik:RadCartesianChart.Behaviors>

At the time this worked perfectly and the SelectionChanged event fired and executed as I wanted.

While revisiting this code recently I found that the event no longer fires and I've spent quite some time looking through my own code to see if any of my changes could have caused this but have not been able to get the event firing again. However in the intervening time since this was last known to work I updated my Telerik version to 2013.3.1204.40. Are there any known issues in this version which could cause the SelectionChanged event to stop firing?

Thanks for the help,

Andy.

ChartView

answered on 22 Jan 2014

3 answers

255 views

DateTimeCategoricalAxis

I have a Cartesian chart with DateTimeCategoricalAxis.
1- I want a free space added at the end of the horizontal axis, and extends it beyond the maximum date which now available on the horizontal chart.

2 Every time the chart is initialized, it previews entire data! Is there a way to show only the last 50 data points at first time initialization of chart?

ChartView

answered on 22 Jan 2014

1 answer

120 views

Asynchronous distinct filter item loading

The following post describes a way to asynchronously load distinct filter items:

http://blogs.telerik.com/vladimirenchev/posts/10-01-07/how-to-populate-radgridview-for-silverlight-distinct-filters-asynchronously-using-wcf-ria-services.aspx

I was able to get my code to work with this method (using a thread to retrieve the items from the DB and adding the result to the collection), but I wonder if there is any better/easier/cleaner way of doing it? The caveat with my current implementation is that I have to manually terminate the long-running thread whenever it becomes redundant (for example, when filter window closes, or when the whole grid is closed etc).

Any idea/recommendation is appreciated. Thanks in advance.

GridView

answered on 22 Jan 2014

3 answers

92 views

Handle Paste from external application

I am having issue where a user pastes item like text or image from external application into a diagram.

When the user does this it adds an item to the diagram with text saying "Telerik.Windows.Controls.Diagram.Extensions.ViewModels.NodeViewModelBase".

How can I handle the paste action so it only pastes items onto the diagram that are valid Telerik diagram items?
And maybe allow pasted text from other applications but not anything else like images?

Diagram

answered on 22 Jan 2014

1 answer

269 views

how to change set for colors in RadStackedDataBar programmatically?

How can I do the same thing of building a BrushCollection and assigning to RadStackedDataBar programmatically in code behind. Thanks for answers.

<telerik:RadStackedDataBar
    Name="xStackedDataBar"
    Grid.Row="1"
    Grid.Column="1"
    Minimum="-20"
    Maximum="20"
    ValuePath="BarValue"
    ToolTipPath="ToolTipItem"
    Margin="10,5">
    <telerik:RadStackedDataBar.BarBrushes>
        <databars:BrushCollection>
          <SolidColorBrush Color="SlateBlue" />
          <SolidColorBrush Color="AntiqueWhite" />
          <SolidColorBrush Color="Aqua" />
          <SolidColorBrush Color="Green" />
          <SolidColorBrush Color="Blue" />
 
        </databars:BrushCollection>
    </telerik:RadStackedDataBar.BarBrushes>
</telerik:RadStackedDataBar>

DataBar

answered on 22 Jan 2014