Questions on UI for WPF Forum

5 answers

267 views

Hi,

I am try to bind a RadGridView to DataView because of the Notify events that are already available. I am using the WPF MVVM architecture therefore the Grid is defined in the XAML and the DataView in my presentation Layer. I have a background worker that will populate the table in the DataView and I was hoping the RadGridView would then update accordingly. I am not too sure why it is not working or whether it can work in this context. Please see the code snippet below.

View:

<telerikGrid:RadGridView x:Name="activeSessionsGrid" AutoGenerateColumns="True" ItemsSource="{Binding Path=ActiveSessions}"

</telerikGrid:RadGridView>

Presentation Model:

private DataView _activeSessions;

public DataView ActiveSessions

{

get

{

return this._activeSessions;

}

private void GenereateTableStructure ( )

{

this._activeSessions = new DataView ( );

this._activeSessions.Table = new DataTable ( "Sessions" );

this._activeSessions.Table.Columns.Add ( "ID" );

this._activeSessions.Table.Columns.Add ( "Name" );

this._activeSessions.Table.Columns.Add ( "Surname" );

this._activeSessions.Table.Columns.Add ( "Designation" );

this._activeSessions.Table.Columns.Add ( "User Name" );

this._activeSessions.Table.Columns.Add ( "Email Address" );

this._activeSessions.Table.Columns.Add ( "Last Access Time" );
}

//BackgroundWorker that populates the _activeSessions table

Thanks in advance for your assistance.

GridView

answered on 22 Oct 2010

1 answer

271 views

How to create style for GridViewDataColumn and replace his Header property

I want to localize my GridView from xml file which has translation for my GridView headers.

I use next code:

<Window.Resources>

<Style TargetType="telerik:GridViewDataColumn">

<Setter Property="Header" Value="someValue"/>

</Style>

</Window.Resources>

<Grid>

<telerik:RadGridView HorizontalAlignment="Left" Name="radGridView1" VerticalAlignment="Top" >

</telerik:RadGridView>

</Grid>

and my code behind:

public partial class Window1 : Window

{

public Window1()

{

InitializeComponent();

var lst = new List<Foo>

{

new Foo() {CompanyName = "Burkinafaso", Phone = "6666"},

new Foo() {CompanyName = "Reebok", Phone = "555"}

};

radGridView1.SetBinding(RadGridView.ItemsSourceProperty, new Binding {Source = lst});

}

public class Foo

{

public string CompanyName { get; set; }

public string Phone { get; set; }

}

But Headers not change. Why I cannot change headers with this approach?
I am planning to bind TextBlock to the XmlNode value and get appropriate translation by Header system name

GridView

answered on 21 Oct 2010

7 answers

860 views

How to deal with GridViewDataColumn.CellTemplate and virtualization

Hi,

Given the grid below:

<my:RadGridView

x:Name="grdData"

VerticalAlignment="Stretch"

ItemsSource="{Binding List}"

ShowGroupPanel="False"

AutoGenerateColumns="False"

EditTriggers="None"

CanUserSelect="False"

Tag="{Binding ComboBoxList}"

>

<my:RadGridView.Columns>

<my:GridViewDataColumn Header="Variable" TextAlignment="Center">

<my:GridViewDataColumn.CellTemplate>

<ComboBox

ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor,

AncestorType={x:Type my:RadGridView}, AncestorLevel=1}, Path=Tag}"

SelectedValuePath="Value"

DisplayMemberPath="Name"

SelectedValue="{Binding SelectedItem}"

/>

</DataTemplate>

</my:GridViewDataColumn.CellTemplate>

</my:GridViewDataColumn>

</my:RadGridView.Columns>

</my:RadGridView>

Which is a grid with a single column which has a custom datatemplate with a combobox in it. Each item in the list has a value assigned (no ComboBox is empty).

When the list is long and the vertical scrollbars are visible, if I drag the scrollbar down, hiding a few items at the top, sometimes the items that were hidden re-appear unselected (DependencyProperty.UnsetValue).

I solved the issue by turning off the Row Virtualization (EnableRowVirtualization="False") but I would like to know if this is a bug or if I am missing a step when using custom datatemplates with virtualization.

I can submit a bug report with a demo of the problem if you prefer.

Thanks,
Jose

GridView

answered on 21 Oct 2010

1 answer

92 views

Possible Performance Issue With Telerik RadChart and MSFT Unity Container

"Consider whether the performance impact of registering in the container and resolving instances from it is acceptable in your scenario. For example, if you need to create 10,000 polygons to draw a surface within the local scope of a rendering method, the cost of resolving all of those polygon instances through the container might have a significant performance cost because of the container's use of reflection for creating each entity."

Please see the section title, "Considerations for Using the Container", in the following link:
http://msdn.microsoft.com/en-us/library/ff921140(v=PandP.20).aspx

One possible solution is not to resolve/inject the module containing your rendering method inside the Unity Container.

You folks at Telerik may want to take a closer look at this, perhaps do a mockup to test this out, given that Unity is being use for a great many projects.

Patrick

General Discussions

answered on 21 Oct 2010

2 answers

113 views

Is Hidden Property

Hi,
I've got two Radpane in one RadPaneGroup. If i change the IsHiddenProperty it works fine.
But if i Float One of the Pane Outside the COmpass Area and then i change IsHidden Property .. this pane hide but never shows again.

private void radDockPanel1_Close(object sender, Telerik.Windows.Controls.Docking.StateChangeEventArgs e)

{

p1.IsHidden = !p1.IsHidden;

}

this is the code in a button click.. It doesn' work if i drag a pane outside the compass area.

THX AGAIN

Docking

answered on 21 Oct 2010

1 answer

75 views

Suggestion about behavior

Hello again,

I want to suggest a better behavior for this control that would help it stay 508 compliant. When I use the RadTabControl in my applications, and a user attempts to change the tab using just the keyboard, this control behaves in a way that is not typical. For starters, the RadTabItem’s default IsTabStop value is “false”. Second, even when we set the IsTabStop to “true”, the focus is automatically changed from the Tabs to the first control in the tab being activated. This is not a typical behavior as seen in the stock TabControl that Microsoft wrote (or any other Tab control to speak of). Finally there is the matter of the AutomationPeer (as in there is none for either the RadTabControl or RadTabItem). This presents an issue for customers like me who are required to make our products accessible.

- Rashad Rivera

TabControl

answered on 21 Oct 2010

1 answer

100 views

Displaying Carousel item on add

I am adding items to the carousel at runtime. Although the items are added, none is displayed until I use the horizontal scroll bar.
How to bring the item in view when added?

Carousel

answered on 21 Oct 2010

1 answer

67 views

Header hyperlink

Hi..
How can I create Header hyperlink so when you click on the header it fires a hyperlink event?
For example my header will be file names and I want to open the file when the header is clicked.
thanks again

GridView

answered on 21 Oct 2010

3 answers

177 views

Many Point Data Problem

Binding to the DataTable when DataBinding multiple Row to the error

DataCode

public DataTable GetDataTable()

{

DataTable dataTable = new DataTable();

dataTable.Columns.Add("Time", typeof(DateTime));

dataTable.Columns.Add("DoubleData", typeof(double));

dataTable.Columns.Add("Time2", typeof(DateTime));

dataTable.Columns.Add("DoubleData2", typeof(double));

for (int index = 0; index <1000; index++)

{

DataRow dataRow = dataTable.NewRow();

dataRow["DoubleData"] = 21.7003078460693;

dataRow["DoubleData2"] = 21.7003078460693 + 10;

dataRow["Time"] = DateTime.Now.AddSeconds(index);

dataRow["Time2"] = DateTime.Now.AddSeconds(index+1);

dataTable.Rows.Add(dataRow);

}

return dataTable;

}

Chart Code

radChart.DefaultView.ChartArea.AxisX.LayoutMode = AxisLayoutMode.Auto;

radChart.DefaultView.ChartArea.AxisX.IsDateTime = true;

radChart.DefaultView.ChartArea.AxisX .DefaultLabelFormat = "hh:mm MM:ss";

radChart.DefaultView.ChartArea.AxisX.AutoRange = true;

SeriesMapping seriesMapping = new SeriesMapping();

LineSeriesDefinition lineSeriesDefinition = new LineSeriesDefinition();

ItemMapping YItem = new ItemMapping("DoubleData", DataPointMember.YValue);

ItemMapping XItem = new ItemMapping("Time", DataPointMember.XValue);

seriesMapping.LegendLabel = "1";

lineSeriesDefinition.ShowItemLabels = false;

lineSeriesDefinition.ShowPointMarks = false;

seriesMapping.SeriesDefinition = lineSeriesDefinition;

seriesMapping.ItemMappings.Add(YItem);

seriesMapping.ItemMappings.Add(XItem);

lineSeriesDefinition.ShowItemToolTips = true;

radChart.SeriesMappings.Add(seriesMapping);

SeriesMapping seriesMapping2 = new SeriesMapping();

LineSeriesDefinition lineSeriesDefinition2 = new LineSeriesDefinition();

ItemMapping YItem2 = new ItemMapping("DoubleData2", DataPointMember.YValue);

ItemMapping XItem2 = new ItemMapping("Time2", DataPointMember.XValue);

seriesMapping2.LegendLabel = "2";

lineSeriesDefinition2.ShowItemLabels = false;

lineSeriesDefinition2.ShowPointMarks = false;

lineSeriesDefinition2.ItemLabelFormat = "mm:dd hh:MM:ss";

seriesMapping2.SeriesDefinition = lineSeriesDefinition2;

seriesMapping2.ItemMappings.Add(YItem2);

seriesMapping2.ItemMappings.Add(XItem2);

radChart.SeriesMappings.Add(seriesMapping2);

radChart.ItemsSource = GetDataTable(); <-- Error

Error

No generic method 'Average' on type 'System.Linq.Enumerable' is compatible with the supplied type arguments and arguments. No type arguments should be provided if the method is non-generic.

What should I do?

Chart

answered on 21 Oct 2010

4 answers

158 views

AutomationPeer for RadTabControl and RadTabItem

Hello All,

Is Telerik planning on completing the AutomationPeer implementations of these two controls? The current implementation returns null for both control's OnCreateAutomationPeer() methods.

- Rashad Rivera
Omegus Prime, LLC

TabControl

answered on 20 Oct 2010