Questions on UI for WPF Forum

1 answer

78 views

Grouping

I have a grid with about 1,000 records and then grouped - the largest group has about 580 records in it. When I click on the group heading to expand this group it is very slow (over 1 to 2 seconds). The grid has 16 columns in it. When I make the window smaller (i.e. only a smaller portion of the grid is visible) this reduces the time to expand the group.

Can you suggest any likely causes for this behavior and/or any ways to optimize it

Thanks

GridView

answered on 08 Apr 2014

1 answer

127 views

where's MetroColors class reside in new telerik UI for wpf

I am trying to upgrade UI for wpf from 2012 version to the latest 2014 Q1. I got the build error complaining about MetroColors missing. I check the class is in old version's Telerik.Windows.Controls namespace but NOT in the new version's same assembly. Where should I get the assembly containing MetroColors class and related ones?

General Discussions

answered on 08 Apr 2014

1 answer

138 views

IsEditable on GridViewComboBoxColumn

I am using the following CellTemplate because I need the IsEditable property for the combo box:

<telerik:GridViewDataColumn Width="100" >
                    <telerik:GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <ComboBox DisplayMemberPath="Name" SelectedValuePath="ID" SelectedValue="{Binding CountryID, Mode=TwoWay}" ItemsSource="{Binding Countries, Source={StaticResource CountriesList}}" />
                        </DataTemplate>
                    </telerik:GridViewColumn.CellTemplate>
                </telerik:GridViewDataColumn>

My issue is that now my OnRowEditEndedCommandCommandExecuted event does not run, and I do not know how to get it to run when the normal combo box is edited to update the correct row. Any ideas? Thank you.

GridView

answered on 07 Apr 2014

1 answer

88 views

Auto themeable color value

Hey guys,

I noticed in the versions notes for internal build 2014_1_0324 there is a line in the 'What's new' section that says 'Introduced Auto themeable color value'.

Can you go into a little more detail about what this is, and how to use it?

Thanks,
Niko

General Discussions

answered on 07 Apr 2014

1 answer

168 views

FilterDescriptors to Expression

I'm using ProLinq (http://prolinq.codeplex.com/) to expose IQueryable directly to clients of my service.

I'm binding this Queryable to my RadfGridView but it's not working how i expected: The IQueryable that the service return is only for one use, when grid need to refresh (by a filter change for example) the grid must be obtain other IQueryable from the service.

I'm trying to make this to work in several ways but i don't success for now :(
- I'm overload Filtering and Sorting events to change grid filter every time
- I'm try to convert the FilterDescriptor to System.Linq.Expression to get new IQueryable from service and apply the expression on it, but i don't know
- I'm trying use VirtualQueryableCollectionView but when i filter the grid the service is not called.

Any idea how i can complete this behavior?

Thanks.

GridView

answered on 07 Apr 2014

1 answer

108 views

Handing Paste

Hello, I'm trying to validate pasting into the grid. I'm using PastingCellClipboardContent because it lets me know which cell is being pasted into and the value, but I can't cancel at this point. Even if I set the e.Handled = true, the value is in the cell. The Pasting event will cancel, but that event doesn't have a GridViewCellInfo object like PastingCellClipboardContent does, so I don't know which cell(s) are being pasted and their values. Is there a way to handle this so I can validate the input and cancel or allow each value for each cell?

Thanks,
Scott

GridView

answered on 07 Apr 2014

3 answers

103 views

Changing values in Model does not trigger Agregate Function

I display a short list of data in WPF grid in MVVP environment.

I can edit some values in the grid itself and the SUM Agregate function is triggered and the Grid displays the new Total.

But if data is changed in the Model itself, the values are displayed in the grid rows but the SUM is not triggered !

In MVVP the Model is NOT aware of View controls and should not call a refresh method on the grid...

How can this be done ?

Thanks,

Michel

GridView

answered on 07 Apr 2014

1 answer

297 views

How to bind item in RowDetailsTemplate?

Hi,

I have this xaml code:

<telerik:RadGridView x:Name="DynTableGridView"

ItemsSource="{Binding DataTables">

<telerik:RadGridView.RowDetailsTemplate>

<DataTemplate

<telerik:RadBusyIndicator IsBusy="{Binding ????? DoInput}"

>

              <Grid>

                ....................

                some code

                ....................

              </Grid>

           </telerik:RadBusyIndicator>

</DataTemplate>

</telerik:RadGridView.RowDetailsTemplate>

</telerik:RadGridView>

and DynTablesViewModel class

public class DynTablesViewModel:ViewModelBase

{

private ICollectionView _dataTables;

private bool _doInput = true;

public void InitData()

{

DataTables = new QueryableCollectionView(.........);

}

#region Property

public bool DoInput

{

get { return _doInput; }

set { _doInput = value; OnPropertyChanged("DoInput"); }

}

public ICollectionView DataTables

{

get { return _dataTables; }

set { _dataTables = value; OnPropertyChanged("DataTables"); }

}

#endregion

}

How to bind RadBusyIndicator in RowDetailsTemplate? RadBusyIndicator IsBusy="{Binding ????? DoInput}"

GridView

answered on 07 Apr 2014

3 answers

174 views

How to expose Read-Only List of Integers

Hello,

We have a property to display that is a List{Integer}. This should be a readonly only collection. Is the PropertyGrid smart enough to work with ReadOnlyCollections? Or what sort of DataTemplate magic do we need to do wiring it up?

Similar question for custom types like Enums, or strings, etc.

Thank ye...

Best regards.

PropertyGrid

answered on 07 Apr 2014

1 answer

168 views

Category Y Axis, Time X Axis

Hello,

I'm trying to format a chart that has a status or category on the Y axis, and a time on the X axis. Please see attached image for an example of what I'm talking about. I've tried a couple different scenarios, but I'm having trouble adding CategoricalDataPoints to my LineSeries. I'm currently trying to use the RadCartesianChart, which I'm not even sure is the most appropriate. Could anyone provide some guidance on if I'm using the right chart, axes, etc...and maybe a small example of adding data to the series programatically?

This is what I have so far, which I know is not well written, just trying to get a POC working. The CategoricalDataPoint is expecting a double as the value, but I actually just have a category.

RadCartesianChart chart = new RadCartesianChart();

chart.HorizontalAxis = new DateTimeContinuousAxis();

chart.VerticalAxis = new CategoricalAxis();

LineSeries line = new LineSeries();

line.Stroke = new SolidColorBrush(Colors.Orange);

line.StrokeThickness = 2;

SqlCeConnection con = new SqlCeConnection(connectionString); ;

con.Open();

using (SqlCeCommand command = new SqlCeCommand(

"SELECT Log.contact as contact, Status.name as status, Log.time as time FROM Log INNER JOIN Status ON Log.status_id = Status.id WHERE (Log.contact = 'Bob')"

, con))

{

SqlCeDataReader reader = command.ExecuteReader();

while (reader.Read())

{

DateTime time = Convert.ToDateTime(reader["time"]);

string person = Convert.ToString(reader["contact"]);

string status = Convert.ToString(reader["status"]);

if (time.DayOfYear == DateTime.Now.DayOfYear - 1)

{

line.DataPoints.Add(new CategoricalDataPoint() { Value = time, Category = status });

}