Questions on UI for WPF Forum

1 answer

64 views

Hi,

We are currently implementing automated UI testing and would like to know if there has been any progress on the automation support for the RadTreeListView in the upcoming May 12^th release. Please reference http://www.telerik.com/community/forums/wpf/treelist/radtreelistview-automation-testing.aspx for any additional information.

Thanks,

Greg

TreeListView

answered on 05 May 2011

8 answers

215 views

Problem with GridView GridCell styles

Hello.

We have a bug that's arisen with a couple of GridViews. In each row, we have a number of columns. One of these columns, let's call it Column X, has a CellStyle that contains a DataTrigger to start a storyboarded animation for a cell's colour based on it's contents. Clearly, this animation is only meant to occur on cells in this particular column, but unfortunately, when the GridView is scrolled horizontally, the colour animation begins to play on cells in other columns in the row. Output from Snoop seems to suggest that the defined CellStyle on Column X is being erroneously retained somewhere and used as a default style for cells in other columns as they are dynamically created and destroyed, or perhaps reused, during the scrolling. The fact that the animation only starts on other columns when Column X is scrolled out of view seems to support this.

I have attempted to fix it by setting normal CellStyles on all of our other columns, but this hasn't alleviated the problem.

Is this an issue that has been observed before? Is there a solution, or perhaps some more steps that I can take to try to fix it?

Thanks,
- Chris M.

GridView

answered on 05 May 2011

1 answer

120 views

Problem using progressbar with double click event of treeviewitem

I'm creating a windows explorer-like application using a treeview control. When a user double clicks a treeview item, it reloads the treeview with the new directory and its subfolders and files. Works fine.

I tried to add a progress bar to it and have it update using the backgroundworker object, like this msdn example:
http://msdn.microsoft.com/en-us/library/system.componentmodel.backgroundworker.aspx

using this code for the mouse double click event of the treeview items:

private void tvDirectory_MouseDoubleClick(object sender, MouseButtonEventArgs e)

{

RadTreeViewItem item = (RadTreeViewItem)((RadTreeView)sender).SelectedContainer;

string arg = item.Header.ToString();

wrkDeploy.RunWorkerAsync(arg);

}

and this for the background worker eventhandlers:

BackgroundWorker wrkDeploy;

public MainWindow()

{

InitializeComponent();

this.wrkDeploy = new BackgroundWorker();

wrkDeploy.RunWorkerCompleted += new RunWorkerCompletedEventHandler(wrkDeploy_RunWorkerCompleted);

wrkDeploy.DoWork += new DoWorkEventHandler(wrkDeploy_DoWork);

wrkDeploy.ProgressChanged += new ProgressChangedEventHandler(wrkDeploy_ProgressChanged);

}

private void wrkDeploy_DoWork(object sender, DoWorkEventArgs e)

{

string item = e.Argument.ToString();

if (isDirectory(_currentPath + item.ToString()))

{

_currentPath += @"\";

DirectoryInfo di = new DirectoryInfo(_currentPath);

DirectoryInfo[] directories = null;

int cnt = 0;

int maxCnt = 0;

try

{

directories = di.GetDirectories();

FileInfo[] files = di.GetFiles();

maxCnt = directories.Length + files.Length;

while (cnt < maxCnt)

{

foreach (DirectoryInfo dInfo in directories)

{

RadTreeViewItem tvDirectoryItem = new RadTreeViewItem() { Header = dInfo.Name, DefaultImageSrc = "folder_icon.gif", ItemsOptionListType = OptionListType.OptionList, OptionType = OptionListType.None };

tvDirectory.Items.Add(tvDirectoryItem);

cnt += 1;

int percentComplete = (cnt / maxCnt) * 100;

wrkDeploy.ReportProgress(percentComplete);

}

if (files.Length > 0 && cnt == 0)

{

RadTreeViewItem root = new RadTreeViewItem() { Header = "Select/Deselect All Files in Folder" };

root.Checked += new System.EventHandler<Telerik.Windows.RadRoutedEventArgs>(tvDirectory_itemChecked);

root.Unchecked += new System.EventHandler<Telerik.Windows.RadRoutedEventArgs>(tvDirectory_itemUnChecked);

tvDirectory.Items.Add(root);

}

foreach (FileInfo fInfo in files)

{

RadTreeViewItem tvFileItem = new

RadTreeViewItem() { Header = fInfo.Name, ItemsOptionListType = OptionListType.CheckList, OptionType = OptionListType.CheckList };

tvFileItem.Checked += new EventHandler<Telerik.Windows.RadRoutedEventArgs>(tvDirectory_fileChecked);

tvFileItem.Unchecked += new EventHandler<Telerik.Windows.RadRoutedEventArgs>(tvDirectory_fileUnChecked);

tvDirectory.Items.Add(tvFileItem);

cnt += 1;

int percentComplete = (cnt / maxCnt) * 100;

wrkDeploy.ReportProgress(percentComplete);

}

catch (UnauthorizedAccessException uae) { }

}

private void wrkDeploy_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)

{

}

private void wrkDeploy_ProgressChanged(object sender, ProgressChangedEventArgs e)

{

this.ProgressBar1.Value = (double)e.ProgressPercentage;

}

I get an error stating "The calling thread must be STA, because many UI components require this." when I run it on the line that instantiates the first treeview item in my do work event handler
"RadTreeViewItem tvDirectoryItem = new RadTreeViewItem() { Header = dInfo.Name, DefaultImageSrc = "folder_icon.gif", ItemsOptionListType = OptionListType.OptionList, OptionType = OptionListType.None };"

Help please, thanks.

TreeView

answered on 05 May 2011

1 answer

196 views

Merging column header in wpf application using c#

Hi,
I am using telerik gridview in wpf application.I am dynamically created telerik gridview using C#.I want to merge column header ie I want to show each column header under two subheaders through programatically using c#.

GridView

answered on 05 May 2011

2 answers

108 views

Grid View shows white button

RadGridView shows a white button in the grid. I am using version 2011.1.0419.
is there any way to remove the button from the grid.

GridView

answered on 05 May 2011

3 answers

93 views

Locating source for WPFSimulatedDragDropProvider.cs

Hi all,
I get this really nice error message "Locating source for 'c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Core\Controls\DragDrop\DragProviders\WPFSimulatedDragDropProvider.cs'"
in my test project for WPF and OpenAccess, when I drag a column header to the "Drag a column header and drop it here to group by that column" but only if the column I drag doesn't contain string data.
I'm using VS2010 and Telerik 2011 Q1 controls, columns in the RadGridview are autogenerated.

Any thoughts ?

Yours
Bjössi

General Discussions

answered on 05 May 2011

2 answers

289 views

How to get the rows in grid visible area

Hi,

If user scroll the grid to certain row, how can I get the first row in the visible area in grid, also last row in grid if possible?

Thanks

GridView

answered on 05 May 2011

4 answers

137 views

How can I bind the visibility property of a data series through code?

Hi,

The SimpleFiltering example binds the visibility of a data series to a view model via XAML, eg.:

<telerik:DataSeries

LegendLabel="EU-27">

<telerik:DataSeries.Definition>

<telerik:LineSeriesDefinition

ItemLabelFormat="0.#"

Visibility="{Binding Source={StaticResource ViewModel}, Path=SeriesEU27Visibility}" />

</telerik:DataSeries.Definition>

How can I achieve the same functionality via code (I'm coding in Visual Basic)? I'm buidling my data series dynamically through code, however I haven't able to figure out how to bind the visibility property via code.

Kind regards,
Dave.

Chart

answered on 05 May 2011

4 answers

220 views

Blend 4 & Telerik Control Styles

Dear Telerik,

I have been tasked with styling your RadExpander control using Blend 4 however when locating the Object > Edit Style... menu option in Blend I am faced with only the "Create Empty..." option, the expected "Edit A Copy" option is disabled.

Could this be something to do with referenced libraries? I used the "Convert to Telerik Project" option in Visual Studio to add all of the correct references so would expect them to be available.

Do you know of anything I could try in order to get this working?

Many Thanks

Ben

General Discussions

answered on 04 May 2011

2 answers

237 views

access DataColumn's bound DataMember value within CellTemplate/CellStyle

Hi,

I have a business object which contains a fixed size collection of pattern values which I need to display within a single gridviewrow.
So the gridviewcolumn definition in xaml looks like:

<rad:GridViewDataColumn DataMemberBinding="{Binding Path=DigitPatterns[0], Mode=OneWay}" />
<rad:GridViewDataColumn DataMemberBinding="{Binding Path=DigitPatterns[1], Mode=OneWay}" />
<rad:GridViewDataColumn DataMemberBinding="{Binding Path=DigitPatterns[2], Mode=OneWay}" />

So far everything works perfectly.
The problem is that I need to specify a custom cell style which depends on a single pattern and not the whole business object.
But DataContext within a cell style or template always refers to the business object, so I'm not able to access the bound pattern anymore.

Is there any way to access the value of the DataMemberBinding from within a cell style or template ?

Thanks in advance

GridView

answered on 04 May 2011