Questions on UI for WPF Forum

4 answers

173 views

After assigning GridView ItemsSource to an ObjectSet<Company> as below:

radGridView.ItemsSource = context.Companies

(context is the ObjectContext from Entity Framework 4.0), the only way to automatically get the GridView updated with inserted/deleted items is by calling context.SaveChanges(); this approach is not well suitable, at least, for my needs since I’ve to commit any single change instead of gathering all changes, grouping and filtering on row state (see EntityState property and Added, Modified and Unmodified values), and finally committing.

Where my approach is correct, due to the relevance of Entity Framework in .NET 4.0 platform, are you planning a tighter integration? If yes, what and when?

Thanks

GridView

answered on 26 Apr 2010

2 answers

425 views

Gridview refresh or reset column size

Hi Telerik Team,

How to reset or refresh the Grid view to its original or default sizing mode ?

I set the column with mode to auto and I'm having custom filters to bind the data. If I altered the column sizes and perform another binding the column sizes are not reset.

I tried even binding null data source before binding the actual data. Is there a way to reset the sizing to auto on each binding.

thanks & regards
yenkay

GridView

answered on 26 Apr 2010

2 answers

113 views

Hiding Series

Hello,

I have a chart with 8 data series, like the live data example in the WPF Demos.

I want to hide one ore more of these series, I tried to set the SeriesVisibility of the corresponding SeriesMapping, but it doesn't seem to work. How can I achieve this without removing the SeriesMapping?

Chart

answered on 26 Apr 2010

2 answers

272 views

Problem using RadGridView inside a cell as Editing Template

Hi

I have a Column which generates its Cell Template and its Cell Edit Template using template selectors in code. I need this because the information in that particular column changes according the values selected in the other columns. One of the template generated from my Edit Template Selector class is a RadGridView.

I have a big PROBLEM. When I click that particular column so its enter in edit mode and get the RadGridView template from the template selector class it shows the RadGridView inside the cell perfectly but as soon as I click in any of the internal RadGridView rows to select them, it lost focus and the cell enter in its regular mode.

Any ideas who to overcome this, so I can interact with the internal generated RadGridView.

Some of the code;

Definition of the Column with its template selectors

                    <telerik:GridViewDataColumn Header="Criteria" CellEditTemplateSelector="{StaticResource CellEditTemplateSelector}"  CellTemplateSelector="{StaticResource CellTemplateSelector}"/>         

The piece of code that returns the RadGridView in the CellEditTemplateSelector Class:

                    return (container as GridViewCell).FindResource("RangeGridSelector") as DataTemplate;         

The DataTemplate Resource with the RadGridView definition

                                                <DataTemplate x:Key="RangeGridSelector">         
                                                <telerik:RadGridView AutoGenerateColumns="False"         
                                                            ShowGroupPanel="False"         
                                                            CanUserReorderColumns="False"         
                                                             ItemsSource="{Binding Path=Criterias}">         
                                                    <telerik:RadGridView.Columns>         
                                                        <telerik:GridViewSelectColumn />         
                                                        <telerik:GridViewDataColumn Header="Criteria"  DataMemberBinding="{Binding}"/>         
                                                    </telerik:RadGridView.Columns>         
                                                </telerik:RadGridView>         
                                        </DataTemplate>         

PD: Forgot to mention that I am using the latest internal build of WPF RadControls 2010.1.0416

GridView

answered on 26 Apr 2010

2 answers

250 views

Regarding GridViewCell Value binding.

I have the following DataTemplate:

                    <DataTemplate x:Name="DatePickerCellTemplate" x:Key="DatePickerCellTemplate">         
                        <telerik:RadDatePicker SelectedDate="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:GridViewCell}},Path=Value, Mode=TwoWay}" />         
                    </DataTemplate>         

that I set to a CellTemplate of a GridViewDataColumn dynamically. I also have the DataMemberBinding of the column set to a property ( MyDate) of some object. The MyDate property binding (TwoWay) is done at runtime in the code behind.

I am able to get the value of MyDate appear in the RadDatePicker. But it is not working the other way round, i.e. the changes are propogated back to the MyDate property.

Am i missing something ?

GridView

answered on 26 Apr 2010

1 answer

188 views

Binding aggregate function result to another element (TextBlock)

Hi,

I need to show the aggregated functions results from the footer outside of the RadGridView (binded to a TextBlock, let's say).
So, if I have:

<

telerikControls:RadGridView Name="MyGrid" CanUserFreezeColumns="False" ....

with a column like this:

<

telerikControls:GridViewDataColumn Header="MyColumn" IsFilterable="False"

DataMemberBinding="{Binding MyProperty}">

<telerikControls:GridViewDataColumn.AggregateFunctions>

<telerikData:CountFunction Caption="Count: " />

</telerikControls:GridViewDataColumn.AggregateFunctions>

</telerikControls:GridViewDataColumn> ...

and somewhere in the UI, a textblock like this:

<

TextBlock Name="MyTextBlock" Text="{Binding ElementName=MyGrid, Path=???CountResultFromFooter???}" />

How can I bind to MyTextBlock the result of the count aggregate function from MyColumn column?

Thanks!

GridView

answered on 26 Apr 2010

5 answers

519 views

GridViewImageColumn problem

I am using Telerik RadGridView in my project. I want to show image in column.

    
                            GridViewImageColumn col1 = new GridViewImageColumn();
            
                            col1.Width = 100;
            
                            col1.DataMemberBinding = new Binding("id");
            
                            col1.Header = "PhotoByConverter";
            
                            col1.DataMemberBinding.Converter = new ThumbnailConverter();
            
                            grid.Columns.Add(col1);
            
                            GridViewDataColumn col2 = new GridViewDataColumn();
            
                            col2.Width = 100;
            
                            col2.DataMemberBinding = new Binding("firstName");
            
                            col2.Header = "Person name";
            
                            grid.Columns.Add(col2);
            
                            Grid.ItemsSource=DataTable;

First column not wokrs but second works fine. I use Converter for image shown below

    
                public class ThumbnailConverter : IValueConverter
            
                {
            
                public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
            
                {
            
                                IEnumerable<thumbNail> result = from n in thumbnails
            
                                                    where n.personID == value.ToString()
            
                                                    select n;
            
                    if (result != null && result.First().thumbnail != null)
            
                    {
            
                        return result.First().thumbnail.file;
            
                    }
            
                    else
            
                    {
            
                        return null;
            
                    }
            
                }
            
                public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
            
                {
            
                    throw new Exception("The method or operation is not implemented.");
            
                }
            
               }

I found by id thumbnail of person and set it like data for GridViewImageColumn. I checked with Debuger conveter works properly. I can't undesrtand why it doesn't work. Any ideas?

I use 2009 Q3 version.

My converter returns byte[] type

GridView

answered on 26 Apr 2010

1 answer

112 views

IsSpinEnabled Mouse Scroll

Hi,

I have recently been working with the RadMaskedTextBox control and noticed it has a cool IsSpinEnabled property to enable the mouse wheel to scroll up/down the date value.

I immediatly went to enable it in the DatePicker controls I am using, but it doesn't exist. Is it named something different in the DatePicker's?
There doesn't appear to be any DatePicker documentation either for WPF or Silverlight (at least in the online version), so I couldn't check myself.

Thanks,

A Marshall

DatePicker

answered on 26 Apr 2010

3 answers

96 views

Column rendering in inherited grid.

On inheriting from "RadGridView" and overriding the "OnApplyTemplate" the only the first column is rendered.

    
            namespace WpfApplication7 
        
            { 
        
                public class  MyGrid : RadGridView 
        
                { 
        
                    public override void OnApplyTemplate() 
        
                    { 
        
                        //Custom Code. 
        
                    } 
        
                } 
        
            }

    
            <Window x:Class="WpfApplication7.Window1" 
        
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                xmlns:gridView="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView" 
        
                xmlns:local="clr-namespace:WpfApplication7" 
        
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                Title="Window1" Height="300" Width="300"> 
        
                <Grid> 
        
                    <local:MyGrid> 
        
                        <gridView:RadGridView.Columns> 
        
                            <gridView:GridViewColumn Header="Column1"/> 
        
                            <gridView:GridViewColumn Header="Column2"/> 
        
                            <gridView:GridViewColumn Header="Column3"/> 
        
                            <gridView:GridViewColumn Header="Column4"/> 
        
                        </gridView:RadGridView.Columns> 
        
                    </local:MyGrid> 
        
                </Grid> 
        
            </Window>

Am I doing something wrong

GridView

answered on 26 Apr 2010

3 answers

172 views

Binding dynamic xml to RadGridView

Hi,

I want to programmatically bind the xml document to RadGridView. I have xmldataprovider and I am programmatically setting the provider.document=xmldocument and the provider is the static resource of the grid.

This is not working.

Please let me know.

Thanks..

GridView

answered on 26 Apr 2010