Questions on UI for WPF Forum

1 answer

37 views

RadSplitContainer throws exceptions in Form Designer

I'm using RadControls_for_WPF35_2010_3_1314_Dev in VS.NET 2010.

When I drop a SplitContainer in brand new empty Window, I get one of two errors (it seems to randomly do one or the other):

Exception of type 'MS.Internal.Validate+ValidationFailure' was thrown

or

Value cannot be null
Parameter name: viewItem is null

The latter error shows twice in the same message box. Once like that and a second time in quotes.

Any ideas?

General Discussions

answered on 21 Feb 2011

18 answers

336 views

XamlParse Exception >> themes/office/black/GridViewToggleButton.xaml

Dear Telerik Users

Improving our Plugin we "trying" to make use of the wpf Treegridview Object.
Problem is, that VS 2008 during InitializeComponent(); always comes up with the following "XamlParse Exception"
****
'/Telerik.Windows.Controls.GridView;component/themes/office/black/GridViewToggleButton.xaml' value cannot be assigned to property 'Source' of object 'System.Windows.ResourceDictionary'. Object reference not set to an instance of an object. Error at object 'System.Windows.ResourceDictionary' in markup file 'Telerik.Windows.Controls.GridView;component/Themes/GenericOfficeBlack.xaml'.
****
The Gridview (Treegridview) is placed inside a normal grid in xaml:

<telerik:RadTreeListView Margin="20,12,12,46" Name="radTreeListView1" telerikControls:Theming.Theme="Windows7" />

The containing WPF - Window is launched like this:

Window1 gridViewWPFWindow = new Window1();

var WPF = new System.Windows.Interop.WindowInteropHelper(gridViewWPFWindow);

WPF.Owner = Application.DocumentManager.MdiActiveDocument.Window.Handle;

gridViewWPFWindow.Show();

It's a pity as the WPF RadTreegridview would be the perfect fit for an application we've been developing until recently in Windows Forms.
Thank you for your help.

Markus

GridView

answered on 20 Feb 2011

0 answers

166 views

FILESTREAM read/wriete

Hello,
Does someone can help with reading and writing filestream file from the database. How to do it with the Telerik controls? Which control to use?

General Discussions

asked on 18 Feb 2011

6 answers

789 views

Header toggle button check all/uncheck all

Hi ,

I am using Telerik, Q3 2010, blend 4 vs 2010.
i am using RadGridview, i have 10 columns, in the header i have toggle button for all 10 columns, how can i know which column is checked and on checked i want to select all the cell checkbox in that particular coloumn
please check the attached image.

thanks
sarag

GridView

answered on 18 Feb 2011

2 answers

183 views

Shortcut key to sort RadGridViewColumn

Hi,

I have a RadGridView and need to provide a keyboard short cut to allow the user to change the sort order using the keyboard.

How would you suggest, for example, the best method to set a keyboard shortcut of alt+N to change the sort for the Name column, i.e. mimic clicking on the column header.

Here is a small sample:

<telerik:RadGridView x:Name="mygridView"

ItemsSource="{Binding MyItemsView}"

SelectedItem="{Binding MySelectedItem, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

IsSynchronizedWithCurrentItem="True"

SelectionMode="Single"

SelectionUnit="FullRow"

AutoGenerateColumns="False"

IsReadOnly="True"

IsFilteringAllowed="False"

ShowGroupFooters="False"

ShowGroupPanel="False"

EnableRowVirtualization="True">

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn Header="Number" DataMemberBinding="{Binding Number}" IsSortable="True" Width="Auto" IsGroupable="False" />

<telerik:GridViewDataColumn Header="Name" DataMemberBinding="{Binding Name}" IsSortable="True" Width="*" IsGroupable="False" />

</telerik:RadGridView.Columns>

<telerik:RadGridView.SortDescriptors>

<telerik:SortDescriptor Member="Name" SortDirection="Ascending" />

</telerik:RadGridView.SortDescriptors>

</telerik:RadGridView>

Thanks,

Andy

GridView

answered on 18 Feb 2011

4 answers

100 views

gridview insert and select with pager

How can i select the row just inserted if the gridview has a pager?

How to know which page the inserted row will be placed?

Thanks

Gilberto

GridView

answered on 18 Feb 2011

6 answers

489 views

PRISM/MVVM RadGridView and ContextMenu

Hi all,

in my current project i have some loosely coupled modules. Let´s say in module A we have a RadGridView with a region to extend the context menu.

<telerik:RadGridView x:Name="radGridView" IsReadOnly="True" AutoGenerateColumns="False" ShowGroupPanel="false" RowIndicatorVisibility="Collapsed" ItemsSource="{Binding States}" SelectedItem="{Binding SelectedItem, Mode=TwoWay}">

<telerik:RadContextMenu.ContextMenu>

<telerik:RadContextMenu x:Name="MachineStateContextMenu" cal:RegionManager.RegionName="MachineStateContextMenu" Opened="RadContextMenu_Opened">

<telerik:RadMenuItem Header="Export" Click="RadMenuItem_Click">

<telerik:RadMenuItem.Icon>

<Image Source="/Joma.Workbench.Core;component/Images/page_excel.png" />

</telerik:RadMenuItem.Icon>

</telerik:RadMenuItem>

<telerik:RadMenuItem IsSeparator="True"/>

</telerik:RadContextMenu>

</telerik:RadContextMenu.ContextMenu>

</telerik:RadGridView>

A other module (let`s call it B) extends regio

n `MachineStateContextMenu` with one or more Items bound with commands.




<StackPanel>
    <telerik:RadMenuItem Header="Machinehistory" Command="{Binding MachineHistoryCommand}" />
</StackPanel>

How can i get the current slected row when

`MachineHistoryCommand` is executed? My only idea at the moment is to fire an event via the eventaggregator to inform other modules about a changed selected row.



Are there any approaches that are more reasonable?



Greetings



Ralf

GridView

answered on 18 Feb 2011

3 answers

135 views

Reflection ?

WPF does it support Reflection... silver light does it. I tried to find in wpf control but i couldn't ... Is there one?

Buttons

answered on 18 Feb 2011

7 answers

464 views

Performance Improvement in RadGridView

Hi
I am binding 800000 records to the radgridvew control and one way of doing is as follows as normally.

List<Company> companyList = new List<Company>();

for (int i = 0; i < 800000; i++)

{

companyList.Add(

new Company()

{

Id = i,

Name = "test name " + i,

Address = "test address " + i,

Revenue = 88888888,

BusinessAres = "test area " + i,

});

}

radGridView1.ItemsSource = companyList;

So with Q3 I try to optimize the performance like below.

List<Company> companyList = new List<Company>();

for (int i = 0; i < 800000; i++)

{

companyList.Add(

new Company()

{

Id = i,

Name = "test name " + i,

Address = "test address " + i,

Revenue = 88888888,

BusinessAres = "test area " + i,

});

}

var viewList = new VirtualQueryableCollectionView(companyList) { LoadSize = 10 };

radGridView1.DataContext= viewList;

my xaml code is like this

<Window x:Class="WpfApplication1.MainWindow"

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

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

Title="MainWindow" Height="350" Width="525" xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" Loaded="Window_Loaded">

<Grid>

<telerik:RadGridView HorizontalAlignment="Stretch"

Margin="0,43,0,0"

Name="radGridView1"

ItemsSource="{Binding}"

VerticalAlignment="Stretch" />

<Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="23,12,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" />

</Grid>

</Window>

this increases the rendering speed little but I am still looking something better. So if anyone can suggest a way please reply. Thanks in advance.

Nishan

GridView

answered on 18 Feb 2011

3 answers

139 views

Redgridview Filtering rows based one text enter

Hi,

   I am using Redgridview control in my project ,i tried your example http://www.telerik.com/help/wpf/gridview-how-to-create-external-filtering.html ,i done everything but its giveing an error at class "CustomFilterDescriptor"
protected override Expression CreateFilterExpression( ParameterExpression parameterExpression )
   {
       if ( string.IsNullOrEmpty( this.FilterValue ) )
       {
           return Expression.Constant( true );
       }
       return this.compositeFilter.CreateFilterExpression( parameterExpression );<----------here
   }

i am getting error message like this "Source type must be an enumerable type." at Return value

my reqirement when i enter data in textbox,its filter rows in gridview

i need urgent this

please help me out

thanks,
satish

GridView

answered on 18 Feb 2011