Questions on UI for WPF Forum

5 answers

88 views

DatePicker Error Q3 2009 for WPF

I'm setting the culture of datepicker and use the code below.

CultureInfo cultureInfo = new CultureInfo("en-US");

DateTimeFormatInfo dateInfo = new DateTimeFormatInfo();

dateInfo.ShortDatePattern = "MM/yyyy";

cultureInfo.DateTimeFormat = dateInfo;

radDatePicker1.Culture = cultureInfo;

i've set the IsReadonly= true so that the user cannot input by manually inputing a date, the code above is working fine, but when you click the DatePicker textbox and then click another control error is occured, "Object not set to a reference of object" any idea?

DatePicker

answered on 03 Feb 2011

1 answer

68 views

Need an Example for Drag and Drop

Hi,

I looked couple of example for drag and drop. But could not find one for Drag and Drop within RadGridView with user feedback.

Please provide the code specifically for this. I did implemented without user feedback but I need to implement one with user feedback.

Thanks
Sanket Singhvi

GridView

answered on 03 Feb 2011

5 answers

242 views

RadGridView and checkbox IsSelect properties binding in xaml

Hi,
I am very biginer in Telerik controls. I am facing a problem related to properties binding ( automatic ) . i have a Gridview and inside grid view i have a checkbox , i need to implement functionality where i have to select checkbox on rowselection in xaml.

my code is following ...

<

ex:ExGridView Name="gvItemList" MultipleSelect="True" EnableColumnVirtualization="False" Grid.Column="0" Grid.ColumnSpan="5" Grid.Row="15"

AutoGenerateColumns="False" MaxHeight="200" IsReadOnly="True" RowLoaded="gvItemList_RowLoaded" >

<tcp:RadGridView.Columns>

<ex:ExGridViewDataColumn Width="20" IsResizable="False">

<tcp:GridViewDataColumn.CellStyle x:Uid="chkSelect">

<Setter.Value>

<CheckBox CommandParameter="{Binding}"

HorizontalAlignment="Center" VerticalAlignment="Center"

IsChecked="{Binding Path=IsSelected, Mode=TwoWay,RelativeSource={RelativeSource FindAncestor,
AncestorType={x:Type tcp:GridViewDataColumn}}}" Checked="CheckBox_Checked" Unchecked="CheckBox_Checked"/>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style>

</tcp:GridViewDataColumn.CellStyle>

</ex:ExGridViewDataColumn>

<ex:ExGridViewDataColumn PhraseID="2464" UniqueName="ItemCode" DataMemberBinding="{Binding Path=ItemCode, Converter={StaticResource stringToDisplayStringConverter}}" ></ex:ExGridViewDataColumn>

<ex:ExGridViewDataColumn PhraseID="1218" UniqueName="ItemName" DataMemberBinding="{Binding Path=ItemName, Converter={StaticResource stringToDisplayStringConverter}}" Width="130"></ex:ExGridViewDataColumn>

<ex:ExGridViewDataColumn PhraseID="1607" UniqueName="DepartmentName" DataMemberBinding="{Binding Path=DepartmentName, Converter={StaticResource stringToDisplayStringConverter}}" ></ex:ExGridViewDataColumn>

<ex:ExGridViewDataColumn PhraseID="1002" UniqueName="CategoryName" DataMemberBinding="{Binding Path=CategoryName, Converter={StaticResource stringToDisplayStringConverter}}" ></ex:ExGridViewDataColumn>

</tcp:RadGridView.Columns>

</ex:ExGridView>

we have extendened radgrid in customizable form. still i don't have idea to bind checkbox's checked property to gridview's IsSelect property , i don't want to link object properties , but i need to bind both controls(checkbox and gridrow ) properties . Please have a look and give me some assistance .

Thanks In advance
Regards

Devendra Kumar

GridView

answered on 03 Feb 2011

1 answer

243 views

How to bind to XML Attribute (XPath=@ID)?

I just switched from .NET DataGrid to RadGridView, but the bindings don't work like in the DataGrid. In RadGridView, all rows are empty. I've looked everywhere, and I haven't found any examples of how to use XPATH in RadGridView. I'd appreciate if you could help me to troubleshoot the bindings below. Thank you.

<telerik:RadGridView Grid.Column="1"

Grid.Row="1"

AutoGenerateColumns="False"

DataContext="{Binding MyXMLDoc}"

ItemsSource="{Binding XPath=/Nodes/Node}"

RowIndicatorVisibility="Collapsed"

ShowGroupPanel="False"

GridLinesVisibility="Horizontal">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Width="200"

DataMemberBinding="{Binding XPath=@Key}">

<telerik:GridViewDataColumn.CellTemplate>

<DataTemplate>

<StackPanel Orientation="Horizontal" VerticalAlignment="Top" >

<Image Source="{Binding XPath=@Icon}" ToolTip="{Binding XPath=@Tooltip}" Style="{StaticResource ico16}" />

<TextBlock Text="{Binding XPath=@Key}" Foreground="Black" />

</StackPanel>

</DataTemplate>

</telerik:GridViewDataColumn.CellTemplate>

</telerik:GridViewDataColumn>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

GridView

answered on 03 Feb 2011

1 answer

75 views

Insertion of new rows in a hierarchical gridview

I am having a hierarchical gridview, where I am having a gridview nested into another.

When am trying to insert a new item in the OUTER grid by pressing 'Insert', I do get a new item, but I am not able to insert nested gridview items into it. (Basically I was expecting to see an empty instance of the nested gridview appearing when I insert an item in the outer gridview. ) How can I get the nested gridview for the new items inserted in the outer gridview?

GridView

answered on 03 Feb 2011

5 answers

806 views

WPF RadTreeView operations using MVVM pattern

Hi,
We are using telerik treeview along with MVVM pattern in a WPF application. The view model exposes an observable collection to which nodes in the tree bound to. Also, viewmodel exposes the commands required to add delete and edit nodes in the tree.

I think, When i add/remove an item in the observable collection it should get reflected in the tree but my concern is, will it preserve the state of expanded tree node after its child nodes are modified?

Also i need to add (drop) a node in the treeview by dragging it from another tree or any other control.

I have few queries:
1. Can you please provide us a sample for add/edit/delete node and drag/drop? It will be great if sample uses MVVM pattern.
2. How theses operations in RadTreeVIew are diffrent/easy as comapred to when i use WPF standard treeview
3. Can you please shed some light on UI virtualization support in telerik wpf treeview?

Thanks
Sonal

TreeView

answered on 02 Feb 2011

4 answers

150 views

Programmatic Styling of RadDataFilter

Hello,

I am trying to apply the Windows 7 theme to the RadDataFilter control. If I do so in XAML it works fine. But, if I try to style the control programmatically when the control is loaded (an approach that works for the RadGridView), it does not seem to work. Does anyone know how I can go about styling the control programmatically?

The code I am using is as follows:

// Specify the theme to use for this control.

Theme theme = ThemeManager.FromName("Windows7");

if (theme != null)

{

StyleManager.SetTheme(this, theme);

}

As always, any help, pointers or even thoughts would be appreciated!

Thanks,
Mark.

DataFilter

answered on 02 Feb 2011

2 answers

165 views

Chart Legend Items not clearing

I have a RadChart that has a dynamic set of lineSeries that i add to it after recieving the data from an end device. When i try to clear the Chart for new data, the legend Items do not get cleared.

private void AddTrendPoints(TrendFiles trendfile)

{

if (this.trendGraph.Dispatcher.Thread != Thread.CurrentThread)

{

this.trendGraph.Dispatcher.Invoke(DispatcherPriority.Normal, new DispatcherOperationCallback(delegate

{

#region Setup Series

this.trendGraph.DefaultView.ChartArea.DataSeries.Clear();

this.trendGraph.DefaultView.ChartArea.Legend.Items.Clear();

this.trendGraph.SamplingSettings.SamplingThreshold = trendfile.Records;

DataSeries series = new DataSeries();

LineSeriesDefinition lineDefinition = new LineSeriesDefinition();

ChartLegendItem legendItem = new ChartLegendItem();

int count = 0;

foreach(TrendVariable trendVar in trendfile.Variables)

{

series = new DataSeries();

lineDefinition = new LineSeriesDefinition();

legendItem = new ChartLegendItem();

lineDefinition.ShowItemLabels = false;

lineDefinition.ShowPointMarks = false;

lineDefinition.SeriesName = trendVar.Name;

lineDefinition.LegendDisplayMode = LegendDisplayMode.SeriesLabel;

series.LegendLabel = trendVar.Name;

series.Definition = lineDefinition;

series.Definition.Appearance.Stroke = colors[count];

series.Definition.Appearance.Fill = colors[count];

legendItem.Label = trendVar.Name;

legendItem.Background = colors[count];

legendItem.Foreground = Brushes.White;

trendGraph.DefaultView.ChartLegend.Items.Add(legendItem);

foreach (DataPoint point in trendVar.points)

{

series.Add(point);

}

trendGraph.DefaultView.ChartArea.DataSeries.Add(series);

count++;

}

#endregion

return null;

}), null);

}

else

{

#region Setup Series

this.trendGraph.DefaultView.ChartArea.DataSeries.Clear();

this.trendGraph.DefaultView.ChartArea.Legend.Items.Clear();

DataSeries series = new DataSeries();

LineSeriesDefinition lineDefinition = new LineSeriesDefinition();

ChartLegendItem legendItem = new ChartLegendItem();

int count = 0;

foreach (TrendVariable trendVar in trendfile.Variables)

{

series = new DataSeries();

lineDefinition = new LineSeriesDefinition();

legendItem = new ChartLegendItem();

lineDefinition.ShowItemLabels = false;

lineDefinition.ShowPointMarks = false;

lineDefinition.SeriesName = trendVar.Name;

lineDefinition.LegendDisplayMode = LegendDisplayMode.SeriesLabel;

series.LegendLabel = trendVar.Name;

series.Definition = lineDefinition;

series.Definition.Appearance.Stroke = colors[count];

series.Definition.Appearance.Fill = colors[count];

legendItem.Label = trendVar.Name;

legendItem.Background = colors[count];

legendItem.Foreground = Brushes.White;

trendGraph.DefaultView.ChartLegend.Items.Add(legendItem);

foreach (DataPoint point in trendVar.points)

{

series.Add(point);

}

trendGraph.DefaultView.ChartArea.DataSeries.Add(series);

count++;

}

#endregion

}

After the initial load, the legend items just append to the legend. So i get repeat Series legend items. Its not being cleared on the Legend.Items.Clear() method.

Chart

answered on 02 Feb 2011

1 answer

59 views

Customize selected appearance / remove selection style

Hi Telerik,

I have a couple of question about how to change the appeance of the selection style.

1. I have disabled editing and do not wish the selection to display a rectangular border around the clicked cell, i just want the row to be selected as per default when the application starts and no cell has been clicked.

2. Can I remove the selection style completely? I'm using the treelistview to display a set of data where I have disabled selection, but when I populate the data, as per default the first item is selected and given the selection style which ruins the layout abit. I still wish to keep the rowheader but without the arrow icon used for selection.

Thanks in advance,

/Kasper Schou

TreeListView

answered on 02 Feb 2011

4 answers

133 views

Persistence

Hello,

I have the need to be able to persist and restore the state of a RadDataFilter. I was hoping to be able to save-off and restore the FilterDescriptors collection, but unfortunately it is read-only. So, what would be the best approach to making this happen? Is persistence supported at all?

Thanks,
Mark

DataFilter

answered on 02 Feb 2011