I have a RadCartesianChart chart with a dynamic number of date/double series.  So, I'm using a ChartSeriesProvider and programmatically generating the CategoricalSeriesDescriptor instances for the series.  The x values for the data are of type DateTime, but the query results are actually grouped by the actual query already so that they are per year, month, etc.  So, if the query was grouped by month, I would have a single point to plot where the Datetime value is on the first of the month.  For most groupings, I can use the axis.LabelFormat property to provide an x axis label that is appropriate to the grouping.  Ex. for month, I'd provide something like "MMM, yyyy". However, there is no format specifier for week number (of the year) or quarter number for me to generate labels like "Week 12, 2013".  Is there a way for me to generate that kind of label? Maybe some other method besides using Axis.LabelFormat?

Thanks - Mitch

I think I've seen this problem before, but none had a documented resolution.  I have a list of objects from the database that I want to display in a property grid.  The tables and view have been built to provide all that I need for the property grid.  Here is the poco def:

public class Setting

{

public string ParameterName { get; set; }

public string ParameterValue { get; set; }

public string DataTypeName { get; set; }

public string ParameterTypeName { get; set; }

public string Description { get; set; }

}

I am trying it in code behind first, so my xaml is simple:

<telerik:RadPropertyGrid x:Name="_propertyGrid" AutoGeneratePropertyDefinitions="False" />

and the code-behind gets the list of Setting instances from the view model and wraps a PropertyDefinition around it.  It adds that PropertyDefinition to the property grid, then binds the property grid to the entire list:

List<Setting> settings = viewModel.Settings;

foreach (Setting setting in settings)

{

_propertyGrid.PropertyDefinitions.Add(new PropertyDefinition(/*new ItemPropertyInfo(setting.ParameterName, Type.GetType(setting.DataTypeName), setting.Description)*/)

{

 Binding = new Binding("ParameterValue") { Mode = BindingMode.TwoWay /*, Path = new PropertyPath("ParameterValue")*/ },

 

 Description = setting.Description,

 DisplayName = setting.ParameterName,

 GroupName = setting.ParameterTypeName,

});

}

_propertyGrid.Item = settings;

 

This works perfectly in some ways: every instance gets a row in the grid; and the DisplayName, Description, and GroupName all match the poco from whence it came.

However, I cannot get the ParameterValue to display.  I know it is set because I can set DisplayName or Description to setting.ParameterValue and the actual value shows in the name or description, but never in the bound data.

I look at my output window and get no binding errors.  However I get no errors even if I intentionally misspell the ParameterValue property's name, so I don't think that is conclusive.

 

The commented out code is stuff I've tried that either generates a runtime error (new ItemPropertyInfo), or has no effect (new PropertyPath). Both seem interesting though, so I left them in for exploration.

So my question is, can I bind the value of a property grid to a specific property of a poco in a list of them, as I can bind things like Description, DisplayName and GroupName?

Thank you very much for your time on this.

 
Edit: Somebody else commented in another post that it works if PropertySetMode is set to None, so I added this:

_propertyGrid.PropertySetMode = PropertySetOperation.None;

with no effect.  However, if I set to to Union or Intersection, the *GroupName* (not the value, but the category) shows up in the data.  How is that possible?

I have a DataTable bound to a RadGridView. I wish to display data errors for all rows on load.

When I create my DataTable I validate it, and if a cell has an error I call the following:


I can't get this to show up in the grid. How can I do this with a DataTable?

Thanks

We have a RadGridView that's data-bound to a DataView (via ItemsSource). The DataTable can have 1 million records or more and we're sometimes experiencing out-of-memory errors, and memory never seems to be freed. Typical column count for our grid is anywhere from 10 or so to maybe 20+. The more columns, the worse, of course.

The grid is on a WPF UserControl that's hosted inside a WinForms form, in case that makes a difference, and it's set up to auto-generate columns because it's designed to show practically any kind of data from the database that the user wants to query. We have column and row virtualization enabled, and we're using the lightweight templates (which we recently implemented because they're faster).

We really have 2 problems:

1. Memory usage versus the standard .NET data view control. Are there any known issues with excessive memory usage?

2. Memory never seems to be released, even after disposing the DataTable, setting references to null, removing the grid from its parent, disposing the disposables, and other things we've tried. This hurts because even if each of the user's query returns less than a million rows, it adds up over time and the grid doesn't seem to release memory for what was there before.

Thanks for any help.

Hello,
that's now 10 days that the Q3 2013 SP1 version is out, but the offline CHM file still refers to the Q3 2013 version.
It's really a recurrent problem and I had to regularly ask for offline documentation update (for Silverlight and WPF), so please keep it current when a new version is out.
Patrick

I update data in GridView very quickly. Last updated item have a state as if mouse over it.

So when I select item, it is high probability to select wrong item (item, which was last updated), instead of item mouse actually over.

 You can reproduce this problem in demo: GridView -> Real-time Update.

What should I do to solve this problem?

Hi,

I'm having trouble with the logic in my code where the PreviewKeyDown Event is firing multiple times before the KeyUp Event is triggered.

For example:
I press two keys very quickly but NOT at the exact same time. However, my KeyUp event has some logic that needs to be completed in time before the next PreviewKeyDown should be fired.

Is there a way that I can prevent a PreviewKeyDown event from firing again until the respective KeyUp event has finished?
I suppose one solution would be to programmatically Add and Remove the events. I just wondered if there was a flag I can use to check instead.


You can see from my Debug output below that the PreviewKeyDown is firing twice before the KeyUp events have finished:


Many thanks,

Rob

Hello, I have a RadGridView that has potentially thousands of rows and 30-50 columns. The vertical scrolling works great even with 150,000+ rows. However, the horizontal scrolling is very slow and jerky. Also the scroll bar starts off about half the width of the GridView and then shrinks as you scroll to the right. This makes the cursor move off the scroll bar. I've tried changing a few settings, but so far nothing has made any difference.

I am using auto generated columns because I don't know until run-time what columns will be in the grid.

Thanks,
Curtis