Questions on UI for WPF Forum

2 answers

115 views

Hi,

I have set up a RadChart with a ScatterSeriesDefinition. I am then setting the ItemsSource from the code, by passing it an ObservableCollection<> which holds a custom object called Coordinate, which is essentially just an object that stores an X value and a Y value.

My problem is, there is probably about 1000 Coordinate's in the ObservableCollection, yet only about 200 of them are being displayed on the Chart.

Is there a limit to the number of points that this type of chart can hold in one series? Or am I doing something wrong?

Thanks

Chart

answered on 23 Jan 2012

10 answers

237 views

Linking DateTime Axis

I have been trying to find examples of how to handle the linking of two charts axis.

I have two charts which each contain multiple series of dynamic data, the data all has a datetime x-axis.

What I am trying to do is to have them share the same zoom and values / spacing etc along the x-axis for the two charts.

Is there an easy way to achieve this with the radchart? Can you possibly point me in the direction of an example

thanks for you time

regards

Murray

Chart

answered on 23 Jan 2012

2 answers

143 views

Issue with ShowZeroValueLabels

An easy question, hopefully with an easy solution :

I use piecharts and StackedBar100 charts in our application to display voting results and results of multiple choice tests. The results are updated during the test, as answers are coming in. We get complaints about the "0" labels which are disturbing both in the stacked barcharts and in the piechart. However, when I set LabelSettings.ShowZeroValueLabels = false, no labels are ever shown. All datavalues are zero at the start of the test, and updating the dataseries dynamically works ok, but the hidden labels don't appear when a value becomes non-zero. Only solution I see to make the labels appear is to redraw the chart on each incoming result, but that is not feasible.
Is there a way to solve this issue ?

thanks,
Xavier De Donder
Televic Education.

Chart

answered on 23 Jan 2012

3 answers

858 views

Drag & Drop buttons not firing click event

Hello,

I have an application that can drag and drop buttons between borders. I have the drag drop working.

The problem is the button click event seems to be blocked when I set the AllowDrag property to true. I can still see a double click event, just not the actual click event.

<Button Content="drop btn"

Click="Button_Click_1"

telerikDragDrop:RadDragAndDropManager.AllowDrag="True"

MouseDoubleClick="Button_MouseDoubleClick" />

Thanks for the help.
Scott

DragAndDrop

answered on 23 Jan 2012

1 answer

120 views

Creation of Shape files

I have looked at your RadMap demos using shape files and the priciple is exactly what i require for my application. Can you recommend an easy application to use to create shape files?

Regards

Robin

Map

answered on 23 Jan 2012

5 answers

421 views

Add new row not working

When I set my grids datacontext as follows the Add new Row does not work:

dataGridView.DataContext = linqToSqldataContext.GetTable<my_Table_name>().AsEnumerable();

But If I set my datacontext like this it works but then my data in the grid is not binded to the source anymore:
dataGridView.DataContext = linqToSqldataContext.GetTable<my_Table_name>().AsEnumerable().ToList();

Can you explain why this is?

This is just a simplified version of what I am doing. Ideally I want to do the following and have all the data binded without having to process inserts/deletes/and updates for my data source.
dataGridView.DataContext = (linqToSqldataContext.GetTableByName(TableNames.SelectedItem.ToString()));

where GetTableByName is

static class DataContextExtensions

{

public static ITable GetTableByName(this DataContext context, string tableName)

{

if (context == null)

{

throw new ArgumentNullException("context");

}

if (tableName == null)

{

throw new ArgumentNullException("tableName");

}

var dataTable = context.GetType().GetProperty(tableName).GetValue(context, null);

return (ITable)dataTable;

}

GridView

answered on 23 Jan 2012

0 answers

94 views

MVVM architecture

Hi

is that correct to call an element of a view from the viewmodel????
(i'm using MVVMLight)
example:
var grd = (RadGridView)e.Source; (e is KeyEventArgs)

General Discussions

asked on 23 Jan 2012

2 answers

162 views

BindingListCollectionView Position not updating

I am binding a GridView to a BindingListCollectionView. This is being filled by a Linq Query.

I am displaying a GridView of a few fields and a set of text boxes that also display these fields and several others. The Idea is for GridView to provide Sorting and Filtering on the key fields and make the rest of the fields visible when the record is displayed.

This works great if I navigate the GridView with the keyboard, but as soon as I use the mouse to select the record instead of the keyboard aarow keys, the position in the BindingListCollectionView is not updated.

To recap, the BindingListCollectionView position is updated when the grid is navigated with the keyboard arrow keys, but not when rows are selected with the mouse.

Any Ideas on how to work around this problem?

GridView

answered on 23 Jan 2012

1 answer

137 views

Dynamic columns but hide some

Hi, I'm have an unusual requirement here. We want to bind the gridview to any strong-typed objects but at the same time, we're not going to hide some columns. So this basically precludes us from defining columns in XAML. So my option is to handle an event which is fired during the creation of columns. There I could probably suppress the creation of some columns. Is there such an event?

GridView

answered on 23 Jan 2012

1 answer

94 views

gridview-multiple-selection

http://www.telerik.com/help/wpf/gridview-multiple-selection.html

In the above link API, RadGridView has a

ObservableCollection<object> SelectedItems

property. I have a requirement where I need to access the selected grid items in the ViewModel. How can I do that? There is no dependency property for that I can use, and in the code sample you only have codebehind example. Please advice.

Thanks!

GridView

answered on 23 Jan 2012