Questions on UI for WPF Forum

2 answers

119 views

I've got a RadCartesianChart with an Linear X and Y axis. The Y axis goes from 0 to 11 I'm trying to change the background of the plot area only between 10 and 11 (Showing a Warning Area). Anyone have a good idea how to do this?

Tom

ChartView

answered on 12 Feb 2015

1 answer

39 views

User selection of columns in RadGridView

How can I enable user selection of one or more columns in RadGridView?

GridView

answered on 12 Feb 2015

5 answers

261 views

Dynamic Merge Field With Table

Hello,

I use ExpandoObject in RichTextbox for get and set mergefields dynamicly, but i have problem with tables. When i use merge fields in tables i can not give any inline. How can i use dynamic merge fields with table.

Thanx.

RichTextBox

answered on 12 Feb 2015

3 answers

308 views

How to find if Workbook is empty??

Team,

What property is available on a RadSpreadsheet to find if the workbook/activeWorkSheet is empty ?

Currently Im using the below code to find the same.
var stream = new MemoryStream();
new XlsxFormatProvider().Export(radSpreadsheet.Workbook, stream);
if (stream.Length == 3309)
{
//Empty Workbook
}

Spreadsheet

answered on 12 Feb 2015

0 answers

173 views

Mismatch between RadComboBox's selected and displayed values when using a delayed PropertyChanged

I'm trying to figure out why I'm experiencing a mismatch between the displayed and selected value in a RadComboBox.

The below code is a shot at a minimal working example.

If I place the cursor in the RadComboBox (dropdown closed) and press the down key a few times (quickly) the RadComboBox and TextBlock will show different values. From the looks of it the TextBlock is showing the correct value while the RadComboBox is not updating correctly.

Why is this and how can I solve it?

MainWindow.xaml

<Window x:Class="RadComboBox1.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>

<StackPanel>

<TextBlock Name="MyTextBlock" Text="{Binding SelectedItem.Name}"/>

<telerik:RadComboBox

Name="MyRadComboBox"

ItemsSource="{Binding Items}"

SelectedItem="{Binding SelectedItem, Mode=TwoWay}"

IsEditable="True"

DisplayMemberPath="Name"

CanAutocompleteSelectItems="False"

OpenDropDownOnFocus="True"

TextSearchMode="Contains"

IsFilteringEnabled="True">

</telerik:RadComboBox>

</StackPanel>

</Grid>

</Window>

MainWindow.xaml.cs

using System;

using System.Collections.ObjectModel;

using System.ComponentModel;

using System.Windows;

using System.Windows.Threading;

namespace RadComboBox1

{

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

var dataContext = new RadComboBoxDataContext();

MyRadComboBox.DataContext = dataContext;

MyTextBlock.DataContext = dataContext;

}

public class RadComboBoxItem

{

public string Name { get; set; }

}

public class RadComboBoxDataContext : INotifyPropertyChanged

{

public ObservableCollection<RadComboBoxItem> Items { get; set; }

private RadComboBoxItem _selectedItem;

public RadComboBoxItem SelectedItem

{

get

{

var value = _selectedItem;

System.Diagnostics.Debug.WriteLine("GET=" + (value != null ? value.Name : "<null>"));

return value;

}

set

{

System.Diagnostics.Debug.WriteLine("SET=" + (value != null ? value.Name : "<null>"));

_nextSelectedItem = value;

_timer.Stop();

_timer.Start();

}

private RadComboBoxItem _nextSelectedItem;

private DispatcherTimer _timer;

public RadComboBoxDataContext()

{

_timer = new DispatcherTimer();

_timer.Interval = TimeSpan.FromMilliseconds(1000);

_timer.Tick += OnTick;

Items = new ObservableCollection<RadComboBoxItem>();

for (var i = 0; i < 10; i++)

{

Items.Add(new RadComboBoxItem { Name = "Item" + i});

}

SelectedItem = Items[0];

}

private void OnTick(object sender, EventArgs args)

{

_timer.Stop();

_selectedItem = _nextSelectedItem;

OnPropertyChanged("SelectedItem");

}

public event PropertyChangedEventHandler PropertyChanged;

protected virtual void OnPropertyChanged(string propertyName = null)

{

PropertyChangedEventHandler handler = PropertyChanged;

if (handler != null)

{

handler(this, new PropertyChangedEventArgs(propertyName));

}

ComboBox

asked on 12 Feb 2015

1 answer

288 views

How to show busy Indicator or similar when filtering grid

I have telerik radgrid with many records. when applying a filter on columns it take some time to load the records. Here i want to show a busy indicator or similar process while applying the filter. I tried setting radgrid busy property to true in "Filtering" event and setting it to false in "Filtered" event. But it doesn't seems working.

Ex:
    private void Grid_Filtering(object sender, GridViewFilteringEventArgs e)
   {
            grid.IsBusy = true;
    }

    private void Grid_Filtered(object sender, GridViewFilteredEventArgs e)
   {
            grid.IsBusy = false;
   }

Any help would be appreciated. Thanks in advance.

GridView

answered on 12 Feb 2015

2 answers

81 views

Binding Hierarchical Data to Multiple RadGridViews

I have a QueryableDataServiceCollectionView that contains hierarchical data: Contracts and Contract Amounts.

I would like to bind the QueryableDataServiceCollectionView to separate RadGridViews (one for contracts, and one for the contract amounts base on the selected contract).

I have successfully done the above in a single RadGridView using the HierarchyChildTemplate, but would prefer to separate the above into separate grids.

Is this possible?

Any assistance on this is Much Appreciated.

-MikeF

GridView

answered on 12 Feb 2015

1 answer

112 views

Demos Broken For Expression Editor

Wasn't sure how to report this, so I will post it in the forums.

Your Demos for Expression Editor in WPF are broken on both the installed version and the source.

Reproduce In Source Demos:

1. Explore All Controls
2. Click Expression Editor
3. Boom Blows up on line 223 of the SingleExampleViewModel.cs file (In the downloable Demos) --
4. File Not Found Exception
5. An exception of type 'System.IO.FileNotFoundException' occurred in mscorlib.dll but was not handled in user code

Additional information: Could not load file or assembly 'ExpressionEditor, Culture=neutral' or one of its dependencies. The system cannot find the file specified.

Reproduce in installed Demos:
1. Explore All Controls
2. Expression Editor
3. More Choices (Either of the RadGrid Integration).
4. Attached Screenshot.

Works on the Silverlight online examples, but there is only one option, and I was looking at the other.

Regards,

Bart

ExpressionEditor

answered on 12 Feb 2015

2 answers

129 views

rename the current sheet

hi

1- is it possible to handle the event when the user rename a sheet ?
2- how to add a new sheet in Sheetselector?

Spreadsheet

answered on 12 Feb 2015

10 answers

416 views

export to excel problem in WPF : GridView

Hi,
I export to Excel and it work fine, but when one of the rows contains a xml value I get an error when opening up the exported file in Excel:

"Problems during load:
Problems came up in the following areas during load:
Table - file cannot be opened because of errors."

The error log is like this:
XML PARSE ERROR: Malformed or illegal processing instruction
Error occurs at or below this element stack:
    <ss:Workbook>
     <ss:Worksheet>
      <ss:Table>
       <ss:Row>
        <ss:Cell>
         <ss:Data>

I guess Excel gets confused when there's two xml tags in the file?
I use 'xml' extension and ExportFormat.ExcelML

I read another thread about export where there was a problem regarding german umlaut letters.
The solution was to use encoding

byte[] buffer = Encoding.UTF8.GetBytes("<meta charset=\"utf-8\">");
stream.Write(buffer, 0, buffer.Length);

I there a similar way to fix this? to somehow format/encode the xml value so that the file can be exported....

GridView

answered on 12 Feb 2015