Questions on UI for WPF Forum

1 answer

223 views

Hi,

I need to programmatically update the sort order for a gridview, for example if I have a list of orders from different companies, in different countries for different amounts, and the user clicks on the country column to sort, I want to add the company and value columns to the sort so that within each country the orders are sorted by company, and within a company the orders are sorted by amount.

I have tried to add these as SortDescriptors in the 'Sorting' event but I cannot get the sort to use the newly added descriptors.

What technique should I be using?

Thanks,

GridView

answered on 23 Nov 2010

2 answers

112 views

Chart Interactivity not working in WPF

Hello,
I am evaluating Your controls and I would need the interactivity feature for charts, but I can't get it to work.
I am using WPF 4, but nothing. I tried to use the same code in a Silverlight project and there it works perfectly.
You can find my sample project with the WPF and Silverlight application under the following link:
http://www.sendspace.com/file/ap73ki

Could You please tell me what I'm doing wrong?

The only difference I noted was the different Version of the "Telerik.Windows.Controls.Charting".
WPF: 2010.2.924.35
Silverlight: 2010.2.924.1040

Regards

Chart

answered on 23 Nov 2010

3 answers

54 views

Some values for Query for the BingSearchProvider causes a crash

Hi,

I am trying to do some Geocoding using the BingSearchProvider. I have been adding british postcodes and there are some that it doesn't like, which causes a crash that I cannot handle

For example, try

B21 0AG

in your Search Demo

If I add

B21 0AG, Birmingham

then we just get back a Geocoded location for Birmingham as a whole. It works with similar postcodes, for example

B64 6HN

Map

answered on 23 Nov 2010

1 answer

98 views

Too much time to plot a series

I am plotting a line graph with a set of test data of only 5 data points and it takes visibly long time to plot the line. Is it some kind of animated behavior that is responsible for this or I am missing something? Please help me on how I can get the line plotted in just one shot - with no visible delay between its start and end ...

The code is as follws:

The data structure that is set to the itemsource of RadChart control is

private ObservableCollection<KeyValuePair<int, Double>> _datapoints;

The chart is initialised as below:

radchart.DefaultView.ChartArea.AxisX.AutoRange = false;

radchart.DefaultView.ChartArea.AxisX.AddRange(-100, 100, 50);

radchart.DefaultView.ChartArea.AxisX.MajorGridLinesVisibility = Visibility.Visible;

radchart.DefaultView.ChartArea.AxisY.AutoRange = false;

radchart.DefaultView.ChartArea.AxisY.AddRange(-100, 100, 50);

radchart.DefaultView.ChartArea.AxisY.MajorGridLinesVisibility = Visibility.Visible;

SeriesMapping sm = new SeriesMapping();

sm.SeriesDefinition = new LineSeriesDefinition();

sm.SeriesDefinition.ShowItemLabels = false;

sm.ItemMappings.Add(new ItemMapping("Key", DataPointMember.XValue));

sm.ItemMappings.Add(new ItemMapping("Value", DataPointMember.YValue));

radchart.SeriesMappings.Add(sm);

radchart.ItemsSource = _datapoints;




_datapoints.Add(

new KeyValuePair<int, double>(1, 10.0));
 
_datapoints.Add(


new KeyValuePair<int, double>(50, 20.9));
 
_datapoints.Add(

new KeyValuePair<int, double>(80, 80.1));
 
_datapoints.Add(

new KeyValuePair<int, double>(100, 34.8));

I have a button to trigger refresh on the control, who handler is as follows:

private void Refresh_Click(object sender, RoutedEventArgs e)

{

_datapoints[0] = new KeyValuePair<int, double>(1, Rnd.Next(-100, 100) * Rnd.NextDouble());

_datapoints[1] = new KeyValuePair<int, double>(50, Rnd.Next(-100, 100) * Rnd.NextDouble());

_datapoints[2] = new KeyValuePair<int, double>(80, Rnd.Next(-100, 100) * Rnd.NextDouble());

_datapoints[3] = new KeyValuePair<int, double>(100, Rnd.Next(-100, 100) * Rnd.NextDouble());

}

Chart

answered on 23 Nov 2010

1 answer

87 views

Trigger on FormatError

Hi,

I would like to set a default error handling method for all of my DatePicker controls in my application. This "default error handling method" is to set the last valid value on focus lost, if the actual value cannot be parsed. This way, I would like to avoid mistyping problems.

For example if the current value is "2010-11-17" and the user types "aaa", I would like to reset the value back to "2010-11-17" on focus lost instead of clearing the value of the control.

My first idea was to set this behavior in App.xaml as part of the default style of DatePicker (by triggers). Is it possible to achieve my goal this way? Could someone please help me with an example on how to do this? If my idea is wrong, could somebody tell me how this task can be solved?
(The application is using the MVVM pattern.)

Thank you for the answer in advance,
G. M.

DatePicker

answered on 23 Nov 2010

5 answers

79 views

How to display GroupDetails and different Row Types

I am displaying a large amount of timestamped data on a WPF RadGridView that has two levels of grouping.
The two indexed fields used for grouping refer to two other classes of object.
I have a value convertor that allows me to display the name field of the group object on the group header
That works very well.

I now have two needs:

1. What I would really like is that when a group header is selected a 'GroupDetail' section would expand
in the same fashion as a RowDetail so that I can display the fields of the grouping object.

2. Within my data I have some rows that are blank except for the time and an index to an event object

DataTable

time event data_0 ... data_n

t0 0 x0 xn

t1 0 y0 yn

t2 e1 nul nul

t3 0 z0 zn

The event class has different subclasses, They all have a string field but may have different sets of data fields.

I would like to be able to display each event object as a row displaying its string field on a single wide cell, like a group header without the expander. The RowDetails for that row could then ask the event object to display its particular fields.

Thanks

General Discussions

answered on 23 Nov 2010

1 answer

167 views

Custom MouseWheel action

Hello,

ASFIK there is no zoom shortcut in RadScheduleView. As slider seems to be not best solution, I'm trying to implement zoom on CTRL+MouseWheel. But RadScheduleView.MouseWheel event is never invoked.

I've done some research and found the following event handler in ScheduleViewBase

protected override void OnMouseWheel(MouseWheelEventArgs e)

{

e.Handled = true;

double newDelta = SystemParameters.WheelScrollLines * this.VerticalSmallChange;

if (e.Delta > 0)

{

newDelta = -newDelta;

}

double offset = Math.Min(this.ExtentHeight, Math.Max((double) 0.0, (double) (this.VerticalOffset + newDelta)));

this.VerticalOffset = offset;

base.OnMouseWheel(e);

}

MouseWheel event is always handled by control itself.

Is it possible to expose it as done in RadScheduler?

Thanks,
Anatoly

ScheduleView

answered on 23 Nov 2010

0 answers

197 views

RadGrid Cache State

Hello,

I have a need to refresh data in a nested grid and keep any expanded rows, sorting or filtering.

I am using a nested RadGridView. I would like to hold onto the explanded rows state, filter state and sort state of the master and detail grids.

I have been somewhat successful, however I cannot find the correct way to re-apply the expanded items and the detail filters/sorting.

I have tried RadGridView1.ItemContainerGenerator.ContainerFromItem but it always comes back empty. However, the items are populated.

How do I programatically set the row.Isexpanded property using the Items bound to the Itemssource?

How do I re-apply any sorting or filtering to children grids?

Thank you,
Rick

GridView

asked on 22 Nov 2010

6 answers

299 views

Aggregate Function SourceField Path

Hi,



Is it possible to have the aggregate function's source field pointed to a Path?

My data source is generated dynamically so I'm trying to use the Path approach like in DataMemberBinding.



Thanks.





<

telerik:GridViewDataColumn Header="Field 1" Width="120"

DataMemberBinding="{Binding Mode=TwoWay, Path=Columns[1]}" DataFormatString="{}{0:N2}" >

<telerik:GridViewDataColumn.AggregateFunctions>

<telerik:SumFunction Caption="Sum: " SourceField="{Path=Columns[1]}" ResultFormatString="{}{0:N2}"/>

</telerik:GridViewDataColumn.AggregateFunctions>

</telerik:GridViewDataColumn>

GridView

answered on 22 Nov 2010

5 answers

473 views

RadPanelBar and Binding

Hello

I try to use the RadPanelBar with a Binding as ItemSource, but get an unexpected result. Without binding I would use it like this:

    
            <telerik:RadPanelBar> 
        
                <telerik:RadPanelBarItem> 
        
                    <telerik:RadPanelBarItem.Header> 
        
                        <Label Content="Header 1"/> 
        
                    </telerik:RadPanelBarItem.Header> 
        
                    <Label Content="Content 1"/> 
        
                </telerik:RadPanelBarItem> 
        
            </telerik:RadPanelBar>

That is no problem and looks exactly as expected. But as soon as I use it like this:

    
            <telerik:RadPanelBar Name="AttributeSetPanelBar" ItemsSource="{Binding}"> 
        
                <telerik:RadPanelBar.Resources> 
        
                    <DataTemplate DataType="{x:Type wrp:AttributeSet}"> 
        
                        <telerik:RadPanelBarItem> 
        
                            <telerik:RadPanelBarItem.Header> 
        
                                <Label Content="{Binding Name}"/> 
        
                            </telerik:RadPanelBarItem.Header> 
        
                            <Label Content="Content"/> 
        
                        </telerik:RadPanelBarItem> 
        
                    </DataTemplate> 
        
                </telerik:RadPanelBar.Resources> 
        
            </telerik:RadPanelBar>

and set it's DataContext to a List of objects (in this case AttributeSet), it changes its behaviour! Now the header includes the whole content, and the content itself (the secont Label) is also displayd as Header.
Am I doing something wrong, or is this a bug?

Regards
Simon

PanelBar

answered on 22 Nov 2010