Questions on UI for WPF Forum

0 answers

48 views

Just received and imported the newest DLLs into my project and it has made all of my existing filter buttons triple in size. This creates a massive hassle for everyone using this tool.

Are there size/placement properties available to set for the filtering button per column?

Thanks in advance.

GridView

asked on 09 Mar 2012

0 answers

124 views

How to convert filter Expression to Expression<Func<someType, bool>>?

I have some operations that require me to perform updates on items (in bulk, possibly hundreds of thousands, so on the server end), but restricted to the items filtered by the user in the grid. I'm aware of the Telerik.Windows.Data "Where" extension that returns an IQueryable given the grid's filter collection, and that IQueryable has an Expression property that seems to be just what I want.

The signature of my update statement is

Update<TResult>(Expression<Func<TEntity, TResult>> entity, Expression<Func<TEntity, bool>> predicate);

You can disregard the "entity" argument, that describes the data to be updated. How can I use Expression returned from the "Where" method populate the "predicate" argument?

Thanks!

GridView

asked on 08 Mar 2012

1 answer

136 views

Bar Chart -- How To Reflect DataPoint.IsSelected Changes?

What I am trying to do:
I have a bar chart with a series of data points which start out unselected. When I click on a data point in the chart or set the DataPoint.IsSelected property to true, I want the visual display of the bar to change so it stands out by adding a black border around it. So far, I have been unable to get the chart to reflect these selection changes.
Side note -- the Pie chart I did this for automatically has the "explosion" as the default ChartSelectionBehavior which is awesome.

How do I get the chart bars to reflect data point IsSelected changes?

Thanks in advance,

Tracy

ChartView

answered on 08 Mar 2012

6 answers

263 views

Bind to array of arrays

Hi,

Is it possible to bind to an array of arrays?

We need to bind to some dynamic data, so we cannot pre-generate classes for the data items.

Craig

GridView

answered on 08 Mar 2012

7 answers

242 views

GridViewMaskedTextBoxColumn MouseWheel System.FormatException

Hello telerik team,

I get an System.FormatException when i scroll up or down with my mousewheel in my numeric GridViewMaskedTextBoxColumn cell.

Can you confirm this problem?

My WpfControls Version is 2011.3.1220.40 .

GridView

answered on 08 Mar 2012

2 answers

108 views

Drag Cue Positioning`

I have a large-ish drag cue, and I need to be quite precise about where the drop is going to happen (it's into a RadRichTextBox, so position in the text is important).

Is there any way I can control the position of the drag cue? At present, the mouse pointer is somewhere in the middle of the control I'm using. It appears it does something similar in most of the demos, too. I would like the cue to be drawn with the top left (0,0) starting at the mouse pointer position - then I'd be able to see what is under the mouse pointer.

Any help appreciated!

DragAndDrop

answered on 08 Mar 2012

11 answers

351 views

EventToTrigger - Extracting Item to Send as Parameter

I have a screen which has a Gridview and 2 heirarchies within it.

At the moment, I am using the RowEditEnded event of the GridView (and its embedded Grids) to perform updates. I am doing it in such a way which is not very MVVM. For example:

private void TasksRadGridView_RowEditEnded(object sender, Telerik.Windows.Controls.GridViewRowEditEndedEventArgs e)

{

Task updatedTask = e.NewData as Task;

ManageProjectsViewModel vm = this.DataContext as ManageProjectsViewModel;

vm.UpdateTaskCommand.Execute(updatedTask);

}

You can see there that I am casting the DataContext as a ViewModel.
I would prefer to bind directly to properties on the ViewModel in Xaml.

The current Xaml for that UserControl is:

<UserControl x:Class="TimeTracker.View.ManageProjectsView.ManageProjectsView"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

xmlns:cmd="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.WPF4"

mc:Ignorable="d"

d:DesignHeight="300" d:DesignWidth="300"

DataContext="{Binding ManageProjects, Source={StaticResource Locator}}">

<UserControl.Resources>

<ResourceDictionary>

<ResourceDictionary.MergedDictionaries>

<ResourceDictionary Source="../../Skins/MainSkin.xaml" />

</ResourceDictionary.MergedDictionaries>

</ResourceDictionary>

</UserControl.Resources>

<Grid>

<Border Grid.Row="1" Height="Auto" Width="Auto">

<Grid Height="Auto" Width="Auto" Background="#990D0529">

<Border Padding="10" Margin="0" Width="630" Height="600" CornerRadius="10" BorderBrush="#FF3F3636"

BorderThickness="1" Background="{StaticResource TransparentBrush}">

<Border Padding="10" Height="450" Width="580" CornerRadius="10" BorderBrush="#FF3F3636" BorderThickness="1" Background="{StaticResource TransparentBrush}">

<Grid Height="Auto" Width="Auto" Background="#990D0529">

<telerik:RadGridView x:Name="ProjectsRadGridView" AutoGenerateColumns="False"

ColumnWidth="*" GridLinesVisibility="None" telerik:StyleManager.Theme="Transparent"

RowIndicatorVisibility="Collapsed" IsReadOnly="False"

ItemsSource="{Binding Path=Projects}"

RowEditEnded="ProjectsRadGridView_RowEditEnded">

<telerik:RadGridView.ChildTableDefinitions>

<telerik:GridViewTableDefinition />

</telerik:RadGridView.ChildTableDefinitions>

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding Id}" Header="Project Id" UniqueName="Id" IsVisible="False" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding ProjectName}" Header="Name" UniqueName="ProjectName" IsReadOnly="False"/>

<telerik:GridViewDataColumn DataMemberBinding="{Binding Visible}" Header="Visible" UniqueName="Visible" IsReadOnly="False" />

</telerik:RadGridView.Columns>

<telerik:RadGridView.HierarchyChildTemplate>

<DataTemplate>

<telerik:RadGridView x:Name="TasksRadGridView" BorderThickness="0,1,0,1"

telerik:StyleManager.Theme="Transparent"

RowEditEnded="TasksRadGridView_RowEditEnded"

GridLinesVisibility="None" CanUserFreezeColumns="False"

AutoGenerateColumns="False" ItemsSource="{Binding Tasks}"

ShowGroupPanel="False" IsReadOnly="False">

<telerik:RadGridView.ChildTableDefinitions>

<telerik:GridViewTableDefinition />

</telerik:RadGridView.ChildTableDefinitions>

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding Id}" Header="Task ID" IsVisible="False" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding TaskName, UpdateSourceTrigger=PropertyChanged}" Header="Name" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Description}" Header="Description" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Visible}" Header="Visible" />

</telerik:RadGridView.Columns>

<telerik:RadGridView.HierarchyChildTemplate>

<DataTemplate>

<telerik:RadGridView x:Name="WorkItemsRadGridView" BorderThickness="0,1,0,1"

telerik:StyleManager.Theme="Transparent"

RowEditEnded="WorkItemsRadGridView_RowEditEnded"

GridLinesVisibility="None" CanUserFreezeColumns="False"

AutoGenerateColumns="False" ItemsSource="{Binding WorkItems}"

ShowGroupPanel="False" IsReadOnly="False">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding Id}" Header="Work Item ID" IsVisible="False" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Duration}" Header="Duration" IsReadOnly="False" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Description}" Header="Description" IsReadOnly="False" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding DateOfWork}" Header="DateOfWork" IsReadOnly="False" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</DataTemplate>

</telerik:RadGridView.HierarchyChildTemplate>

</telerik:RadGridView>

</DataTemplate>

</telerik:RadGridView.HierarchyChildTemplate>

</telerik:RadGridView>

</Grid>

</Border>

</Grid>

</Border>

</Grid>

</UserControl>

I think one part of the problem is that the embedded Grids are not binding to separate ViewModels. They are binding to the relevant property on the ViewModel:
e.g. the 1st embedded GridView is TasksRadGridView. It binds as so:

ItemsSource="{Binding Path=Projects}"

Is there a way to directly binding to the ViewModel, passing it the valie of the current ro being edited for the embedded grids?
I am familiar with the EventToCommand trigger of the MVVM Light Toolkit. I just can't find a way to extract the value for the current row being edited for items in the embedded Grids. The item would be sent as a parameter using the EventToCommand trigger (I think that is the best design).

Cheers

Cheers

GridView

answered on 08 Mar 2012

5 answers

96 views

CheckBox in GridView (need to be able to check it)

Hello. I have added a CheckBox to a GridView. I need to be able to check and un-check this CheckBox w/o editing the row. I have seen examples where the CheckBox is checked when the row is clicked but this is not what I am after.

Thanks in advance.

GridView

answered on 08 Mar 2012

1 answer

133 views

ColumnWidth="*" as a Style Property

Hello,

It seems there is an issue with ColumnWidth property being speficied as a Style property for the RadGridView. Here is my code

<Window x:Class="GridTest.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="MainWindow"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation">

<Window.Resources>

<Style TargetType="{x:Type telerik:RadGridView}">

<Setter Property="ShowGroupPanel" Value="False"/>

<Setter Property="ColumnWidth" Value="*"></Setter>

</Style>

</Window.Resources>

<Grid Margin="40">

<telerik:RadGridView Name="gridViewCheckBox1" >

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Qtr1" DataMemberBinding="{Binding FinancialQuarter}" />

<telerik:GridViewDataColumn Header="Qtr2" DataMemberBinding="{Binding FinancialQuarter}" />

<telerik:GridViewDataColumn Header="Qtr3" DataMemberBinding="{Binding FinancialQuarter}" />

<telerik:GridViewDataColumn Header="Qtr4" DataMemberBinding="{Binding FinancialQuarter}" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

</Grid>

</Window>

The ShowGroupPanel="false" applies to the grid but I don't see the columns occupying all of the Grid's Width. Is this an existing bug of RadGridView? Any help is appreciated.
Attached is the image of my output.

Note: It works when I specify this property explicitly for each of the RadGridView but not as a part of Style (either as a local resource/Window Resource/ ResourceDictionary)

GridView

answered on 08 Mar 2012

1 answer

141 views

Problem with the dynamic object

Basically I created a dynamic object, it can be an ExpandoObject or any object that inherits from the DynamicObject class, and assign several properties and their associated values to the object. I then set the editor's Item equal to that object. The property Fields was able to list all the object's properties just fine, but as soon as I select one of the property, the editor immediately underlines the property name which indicates an error. The error message appears in the tooltips stated "The [name of selected property] is not a member of type System.Dynamic.ExpandoObject" when I hover over the text. I'm using Q2 2011 edition.

Thanks in advance for your reply.

ExpressionEditor

answered on 08 Mar 2012