Questions on UI for WPF Forum

7 answers

499 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

158 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

3 answers

289 views

GridView CheckBoxColumn

Hi

I am using Q3 2010, Blend 4, VS 2010. i am generating Columns dynamically using GridviewCheckboxColumn my questions are

1. i am using style to align the checkbox at the center of the Column., its working perfectly fine, but the problem is when i am trying
to edit the checkbox moves to the left of the bound column.

2. I need to use two clicks to edit the checkbox, but i am setting the checbox

EditTriggers =

GridViewEditTriggers.CellClick;

         AutoSelectOnEdit = true;
   i need to do two clicks ,

3. I need to set the width and height of the gridviewcheckbox column when i set width =50, height =50, in
   edit mode it is going back to the defulat width and height

please check the attached file

<Style TargetType="telerik:GridViewCheckBox">

<Setter Property="HorizontalAlignment" Value="Center"/>

</Style>

thanks
sarag

GridView

answered on 18 Feb 2011

1 answer

164 views

[Solved] cosmopolitan theme for WPF

Does Telerik team has any plans on adding cosmopolitan theme to their portfolio?

If so, when can we expect that to happen?

Thank you,
Vadim K.

General Discussions

answered on 18 Feb 2011

5 answers

309 views

Menu opening animation

Hi

When the Menus open, they expand vertically from the top. Can I easily change this so that they just appear instantly? Or perhaps make the fade in?

Thanks
Tom Davies
Peavey Digital Research

Menu

answered on 18 Feb 2011

1 answer

54 views

Upgrade from 2010.1.0603 to 2010.3.1314

Hello, we are planning to upgrade our version of "RadControls for WPF".

We are currently in this version: Jun 03, 2010 Q1 2010 SP2 (version 2010.1.0603)
And we want to upgrade to the latest one: Jan 14, 2011 Q3 2010 SP1 (version 2010.3.1314)

We found a page in your website, "RadControls for WPF - Changes and Backward Compatibility" at http://www.telerik.com/help/wpf/changes-backward-compatibility.html
This page has only the changes and compatibility till the Q1 2010 version, which is the one we have.

We would like to know if you can provide us the links where we can find the changes and compatibility from Q1 2010 SP2 to Q3 2010 SP1.

Thanks.

General Discussions

answered on 18 Feb 2011

16 answers

1.2K+ views

Get GridViewRow for Record

Hello,

Is there a way to get the GridViewRow for a record in a RadGridView?

The reason I ask is that I'm trying to implement some behavior where pressing Tab in the last cell of the Grid creates a new row and then puts the first cell for the newly added record in edit mode. I have read this post and this post and have everything working except getting a cell in the new row in edit mode.

Thanks,

Joel

GridView

answered on 18 Feb 2011

1 answer

255 views

SelectionChanged Event Firing When Not Supposed To

We have this strange issue where we have a RadComboBox that we interact with from the code behind.

Basically in certain situations, we want to change the SelectedItem or SelectedValue without firing off our SelectionChanged Event Handler. So we are first Unsubscribing our event handler from the RadComboBox like this:

radComboBox.SelectionChanged -= new SelectionChangedEventHandler(ourEventHandler);

We then set our SelectedItem property to the value we want like so:

radComboBox.SelectedItem = outItem;

And then we resubscribe to the SelectionChanged event like so:

radComboBox.SelectedItem += new SelectionChangedEventHandler(ourEventHandler);

The idea is that while we set our SelectedItem, there should be no event set and nothing should fire. However, this is not the case. Instead as soon as we resubscribe to the event, the event fires all the same. Is this a bug?

ComboBox

answered on 17 Feb 2011

6 answers

548 views

WPF Grid View ScrollBar

I am new to WPF Controls, we are using RAD Grid view in my project, this is a touch screen application. my question is .
Is there any way that i can show the horizontal scrollbar on the top of the column header and i want to show the horizontal scrollbar right after the frozen column. not from the begining of the grid.

regards
sarag.

GridView

answered on 17 Feb 2011

1 answer

250 views

How to cancel drop operation

Can someone please explain how to cancel a drop operation? I tried the delayed drag/drop example before with mixed results. It seems now with the latest release things may have changed on how this may be accomplished.

Scenario:
Upon drop, get the slot time and resource in the destination slot. Create update back to the DB. If that update fails, cancel the drop operation and make sure the appoitment ends up in the position where it started.

Thanks,
Rod

ScheduleView

answered on 17 Feb 2011