Questions on UI for WPF Forum

8 answers

1.0K+ views

CollectionChanged event doesn't update the Grid

Hello,

I have been struggling with the GridView to get it to display my data as my ObservableCollection changes. It appears that the grid is only updating when the user moves a scroll bar. How can I make my grid update as my collection does, without messing up my scroll position. I attempted using the Rebind() method to get it to refresh, but the scroll bar resetting is unacceptable.

Here is a little information about my setup.

I am using the WPF Rad Controls Q2 2012 edition.

My Observable collection is a two dimensional collection that looks like this:

private ObservableCollection<ObservableCollection<LogField>> _RowData;

public ObservableCollection<ObservableCollection<LogField>> RowData

{

get { return _RowData; }

set

{

if (value != _RowData)

{

_RowData = value;

onPropertyChanged(this, "RowData");

}

Here is what the LogField Class looks like:

public class LogField : INotifyPropertyChanged

{

private byte _HighlighFlag;

public byte HighlightFlag

{

get { return _HighlighFlag; }

set

{

if (value != _HighlighFlag)

{

_HighlighFlag = value;

onPropertyChanged(this, "HighlightFlag");

}

private string _Value;

public string Value

{

get { return _Value; }

set

{

if (value != _Value)

{

_Value = value;

onPropertyChanged(this, "Value");

}

private string _DisplayUnits;

public string DisplayUnits

{

get { return _DisplayUnits; }

set

{

if (value != _DisplayUnits)

{

_DisplayUnits = value;

onPropertyChanged(this, "DisplayUnits");

}

private string _BaseUnits;

public string BaseUnits

{

get { return _BaseUnits; }

set

{

if (value != _BaseUnits)

{

_BaseUnits = value;

onPropertyChanged(this, "BaseUnits");

}

private byte _FieldType;

public byte FieldType

{

get { return _FieldType; }

set

{

if (value != _FieldType)

{

_FieldType = value;

onPropertyChanged(this, "FieldType");

}

private string _FieldFormat;

public string FieldFormat

{

get { return _FieldFormat; }

set

{

if (value != _FieldFormat)

{

_FieldFormat = value;

onPropertyChanged(this, "FieldFormat");

}

private int _SelectOffset;

public int SelectOffset

{

get { return _SelectOffset; }

set

{

if (value != _SelectOffset)

{

_SelectOffset = value;

onPropertyChanged(this, "SelectOffset");

}

private int _UnitNumber;

public int UnitNumber

{

get { return _UnitNumber; }

set

{

if (value != _UnitNumber)

{

_UnitNumber = value;

onPropertyChanged(this, "UnitNumber");

}

public event PropertyChangedEventHandler PropertyChanged;

private void onPropertyChanged(object sender, string propertyName)

{

if (this.PropertyChanged != null)

{

PropertyChanged(sender, new PropertyChangedEventArgs(propertyName));

}

I am setting up the columns manually and here is what the column setup and binding look like.

// Initialize the radGridView with the propper settings for a log screen.

int columnIndex = 0;

thisMMGridView.Height = 280;

LogScreen logScreen = (LogScreen)thisMMGridView.CurrentScreen;

thisMMGridView.radGridView.AutoGenerateColumns = false;

thisMMGridView.radGridView.Columns.Clear();

// Build the columns based on the headerStrings

foreach (string headerString in logScreen.ColumnHeaderStrings)

{

GridViewDataColumn column = new GridViewDataColumn();

// Create the column header

TextBlock headerText = new TextBlock();

headerText.Text = headerString;

headerText.TextWrapping = TextWrapping.Wrap;

headerText.TextAlignment = TextAlignment.Left;

headerText.Padding = new Thickness(1, 0, 2, 0);

column.HeaderCellStyle = thisMMGridView.TryFindResource("AlarmGridViewHeaderCellStyle") as Style;

column.Header = headerText;

column.UniqueName = headerString;

thisMMGridView.radGridView.Columns.Add(column);

// Bind the column to it's data

column.DataMemberBinding = new Binding("["+ columnIndex.ToString() +"].Value");

// Bump the column index that is used for the columnBind

columnIndex++;

}

// Freeze the time & date columns so they are always visible

if (thisMMGridView.radGridView.Columns[1].UniqueName == "DATE")

{

thisMMGridView.radGridView.FrozenColumnCount = 2;

}

else

{

thisMMGridView.radGridView.FrozenColumnCount = 1;

}

// Set the ItemsSource property of the grid to the data collection.

thisMMGridView.radGridView.ItemsSource = thisMMGridView.Unit.LogData.RowData;

I have wasted a lot of time on this issue and I am just looking for a solution, so I can move forward.

Hope to hear something soon,
Brian

GridView

answered on 01 Aug 2012

1 answer

162 views

Binding to QueryableDataServiceCollectionView not working

Hi,

I am trying to use QueryableDataServiceCollectionView in my Prism based application.My view model is working fine when binding to DataServiceCollection or DataServiceQuery ,but now I want to gain more control over paging,filtering,sorting,and saving data,so I switched to QueryableDataServiceCollectionView.I changed my view model binding property "DataItems" from DataServiceCollection<T> to QueryableDataServiceCollectionView<T> and now I see the whole data records returned though the pagesize on my QueryableDataServiceCollectionView and on my DataPager is 20.

The grid display 41 records in page 1 and 3 paging buttons [1 2 3].The paging becomes normal (20 records per page) once I click on page1, page 2, or page 3.I checked fiddler and found that the data service query for the first loading lacks the '$top=20' parameter

view.ViewModel.DataItem = new Telerik.Windows.Data.QueryableDataServiceCollectionView<User>(db, db.Users){ AutoLoad = true,PageSize=20};

<telerik:RadGridView ItemsSource="{Binding PagedSource, ElementName=DataPager1}" >

<telerik:RadDataPager Name="DataPager1" Source="{Binding DataItem}" PageSize="20" DisplayMode="Numeric">

Environment:
VS 2010
.NET 4 + WCF
EF 4
Telerik WPF 2012_2_0725 Trial Version

Thanks in advance

DataServiceDataSource

answered on 31 Jul 2012

1 answer

109 views

Need help changing the GridViewGroupFooterCell style

I've tried to do this with Expression Blend and I've had no luck.

I have a form in my WPF application which contains a RadGridView. I've defined Group Aggregates for the grid:

<telerik:RadGridView AlternationCount="1"

AutoExpandGroups="False"

AutoGenerateColumns="False"

CanUserDeleteRows="False"

CanUserFreezeColumns="False"

CanUserInsertRows="False"

CanUserResizeColumns="True"

CanUserSortColumns="True"

DataLoadMode="Synchronous"

EnableColumnVirtualization="True"

EnableRowVirtualization="True"

FontSize="16"

FontWeight="Bold"

Grid.Column="0"

Grid.Row="0"

IsReadOnly="True"

Name="HotListGrid"

ScrollViewer.CanContentScroll="True"

ScrollViewer.HorizontalScrollBarVisibility="Auto"

ScrollViewer.VerticalScrollBarVisibility="Auto"

SelectionChanged="HotListGrid_SelectionChanged"

SelectionUnit="FullRow"

ShowColumnFooters="True"

ShowGroupPanel="False"

ToolTip="Hot Lists">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding Name , Mode=OneWay}"

Header="Hot List"

Width="323">

<telerik:GridViewDataColumn.AggregateFunctions>

<telerik:CountFunction Caption="Count: " ResultFormatString="{}{0:n0}" />

</telerik:GridViewDataColumn.AggregateFunctions>

</telerik:GridViewDataColumn>

<telerik:GridViewDataColumn DataMemberBinding="{Binding ListType , Mode=OneWay}"

Header="List Type"

Width="Auto" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding LastUpdate, Mode=OneWay, Converter={StaticResource DateConverter}}"

Header="Last Update"

Width="200" />

<telerik:GridViewImageColumn DataMemberBinding="{Binding Status , Mode=OneWay, Converter={StaticResource DeviceStatuses}}"

Header="Status"

ImageStretch="None"

Width="95" />

<telerik:GridViewDataColumn Header="Entries"

TextAlignment="Right"

Width="135">

<telerik:GridViewDataColumn.DataMemberBinding>

<Binding Path="EntryCount"

Mode="OneWay"

Converter="{StaticResource LongConverter}"

ConverterParameter="#,##0" />

</telerik:GridViewDataColumn.DataMemberBinding>

<telerik:GridViewDataColumn.AggregateFunctions>

<telerik:SumFunction ResultFormatString="{}{0:n0}" />

</telerik:GridViewDataColumn.AggregateFunctions>

</telerik:GridViewDataColumn>

</telerik:RadGridView.Columns>

</telerik:RadGridView>

My application runs in police cars and has a "night mode" which changes the color pallette. The problem is that the gradient brush used to draw the background of the Group Footer Row is not going away, so I have a light foreground color on a light background color in night mode that is difficult to read.

I have tried to edit the template for the GridViewGroupFooterRowStyle element in Expression Blend with no luck. The gradient used in the background is not going away, even with this xaml in the app.xaml:

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

<Setter Property="Template">

<Setter.Value>

<ControlTemplate TargetType="{x:Type telerik:GridViewGroupFooterRow}">

<Border x:Name="PART_GroupFooterRowBorder" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Padding="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">

<telerik:SelectiveScrollingGrid>

<telerik:SelectiveScrollingGrid.ColumnDefinitions>

<ColumnDefinition Width="Auto"/>

<ColumnDefinition Width="*"/>

</telerik:SelectiveScrollingGrid.ColumnDefinitions>

<Border x:Name="PART_IndicatorPresenter" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="0,0,1,0" Grid.Column="0" telerik:SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" Visibility="{TemplateBinding RowIndicatorVisibility}" VerticalAlignment="Stretch" Width="25">

<Border BorderBrush="White" BorderThickness="1" Background="#FFE4E4E4"/>

</Border>

<Border x:Name="PART_HierarchyIndent" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="0,0,1,0" Grid.Column="2" telerik:SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" Width="25">

<Border.Visibility>

<Binding Path="HasHierarchy" RelativeSource="{RelativeSource TemplatedParent}">

<Binding.Converter>

<telerik:BooleanToVisibilityConverter/>

</Binding.Converter>

</Binding>

</Border.Visibility>

</Border>

<telerik:DataCellsPresenter x:Name="PART_DataCellsPresenter" Grid.Column="3" IsTabStop="False" />

<telerik:IndentPresenter x:Name="PART_IndentPresenter" Grid.Column="1" IsTabStop="False" IndentLevel="{TemplateBinding IndentLevel}" telerik:SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical">

<telerik:IndentPresenter.ItemTemplate>

<DataTemplate>

<telerik:GridViewGroupFooterIndentCell IsTabStop="False">

<telerik:StyleManager.Theme>

<telerik:Office_BlackTheme/>

</telerik:StyleManager.Theme>

</telerik:GridViewGroupFooterIndentCell>

</DataTemplate>

</telerik:IndentPresenter.ItemTemplate>

<telerik:StyleManager.Theme>

<telerik:Office_BlackTheme/>

</telerik:StyleManager.Theme>

</telerik:IndentPresenter>

</telerik:SelectiveScrollingGrid>

</Border>

</ControlTemplate>

</Setter.Value>

</Setter>

<Setter Property="Background" Value="{DynamicResource DataHeaderBackground}"/>

<Setter Property="BorderBrush" Value="{DynamicResource DataBorder}"/>

<Setter Property="MinHeight" Value="25"/>

<Setter Property="BorderThickness" Value="0,0,0,1"/>

<Setter Property="VerticalContentAlignment" Value="Stretch"/>

<Setter Property="HorizontalContentAlignment" Value="Stretch"/>

<Setter Property="SnapsToDevicePixels" Value="True"/>

<Setter Property="Foreground" Value="{DynamicResource DataHeaderForeground}"/>

</Style>

How do I get rid of that gradient?

GridView

answered on 31 Jul 2012

4 answers

576 views

ContextMenu Top Left Position

I'm using a RadContextMenu on a Canvas. When I select an item from the menu, I need to know the point in the Canvas in which I was when I opened the menu for placement of another control. How do I get the top left position of the context menu?

Thanks for your help.

ContextMenu

answered on 31 Jul 2012

0 answers

119 views

Problem calling a modal RadWindow

Hi,

I have an structure like this:

MAinProject with a Custom WindowsClass and a Custom User control

From the main form called "Main" class is instantiated "WindowsClass". This class through a method call generates a window Radwindow type whose content is a custom user control.

Then from the main form made the call to WindowsClass class method as follows:

myClassWindow.AddObjectWindow (objectName, Me)

This command fails me with the implicit object from VB.NET (Me)

The definition of the above method is as follows:

Public Sub AddObjectWindow (ByVal objectName As String, ByVal Owner As System.Windows.Controls.ContentControl)

Error 1 Value of type 'myProject.Main' can not be converted to 'System.Windows.Controls.ContentControl'. C: \ .... \ Projects \ MyProject \ MyProject \ Main.xaml.vb 100 57 myProject

1 - Why is this?
2 - how I can afford it, so the main form (Me) can be passed by value "ByVal" method and this in turn assigned to the Owner property of Radwindow.

I hope I have explained the issue as best as possible ....

Window

asked on 31 Jul 2012

2 answers

86 views

RadRibbonBackstageItem IsDefault Only Works the First Time Backstage is Opened

The title says it all; in Office products, the default is always selected when the Backstage is opened.
Thanks,
Steve

RibbonView and RibbonWindow

answered on 31 Jul 2012

1 answer

112 views

No Group Header Scroll

I have a large dataset that scrolls horizontally. When I scroll to the right, the aggregates in my group header scroll out of view. Is there any way to keep this from happening? I would like to keep the aggregates in the group header visible at all times.

Thank you.

GridView

answered on 31 Jul 2012

3 answers

252 views

Count Groups?

Hi,

is it possible to count the Groups in a GridView and also get the Group Header?

Thanks
Best Regards
Rene

GridView

answered on 31 Jul 2012

3 answers

187 views

Menu animation bug

Hi

RadMenu has animation bug. When mouse move throw top level menu line, the dropdown menu first appear, than disaper and then animated scrolldown. There are some blicking effect.

And now we are turn off animation.

<Window x:Class="MenuSample.MainWindow"

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

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

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

Title="MainWindow" Height="350" Width="525">

<Grid>

<telerik:RadMenu VerticalAlignment="Top" x:Name="mainMenu">

<telerik:RadMenuItem Header="File">