Hi There,

I have created a style which will display a textblock in place of content control and i have to display a tooltip when user mouseover on selected item. unfortunately i am unable to see the tool tip even thought i set it. please see the below template for RadCombobox.
Please let me know how i can do this.


Regards,
Srinivas.

I'm populating a GridView with a large (>10k) number of items and using VirtualQueryableCollectionView with a load size of about 500. I've also enabled deferred scrolling so that the user can quickly scroll to any part of the list without the UI feeling sluggish.

From what I can gather the virtualized elements that get loaded start at the first element visible on the screen and go from there. That's fine if the user is scrolling down because the load only happens once every 500 records, but if the user scroll *up* then a complete 500-record load occurs once for every line scroll. What I need/want is for 250 records to be loaded on either side of the first visible element, that way the user  can thumb scroll to anywhere in the list and then mouse scroll in either direction without hitting the database constantly as they're scrolling.

What's the best way to achieve this? Is it possible to force the loading of a given range of items in response to the ItemsLoading event?

Is there a way to programmatically unselect an item. Right now, upon selection, we launch a window to do some processing on the item and when we are done, we want to return the rad time line to its prior state. We want to unselect the item, so if the item is selected again, it will launch the edit window.

Please let me know.
Paul

I'm missing something here. There's tons and tons of documentation for the RadGridView and yet I still can't find some simple documentation on what I'm looking for. I don't have a lot of .Net experience, so maybe that's the problem, not the Gridview.

I've got a bound gridview (in a WPF application) that gets populated from a dataset. When the user is finished and clicks the update button, I want my code to go through the grid, apply local business rules and formating to individual cell entries, delete records as necessary, and then send the grid contents back to the database.

I would like to go, row by row, through my grid, get the contents of a given column, modify it if necessary, and then call my Stored Procedure to take the data from the row and write it back to the database.

Do I have to set my gridview up as unbound to accomplish this?

I'm currently working on a project that has different windows opened up in multiple threads. There seems to be a problem with commands running in all but the first thread that is created with a RadDocking element in it.

Within each thread, a new window is created, with a RadDocing, RadSplitContainer, RadPaneGroup and a single RadPane. The window is then displayed. When you click on the PaneHeader in any window other than the first thread that is opened, the application immediately throws a threading exception: System.InvalidOperationException: The calling thread cannot access this object because a different thread owns it.

This exception occurs even when we have no code other than starting the threads. Has anyone else had this problem? Is there any way to fix this problem?

Thanks,
Daniel

Hi.
I'm not sure if im doing something wrong, but assuming this example:
http://demos.telerik.com/silverlight/#GridView/Performance
with 1000000 rows, 5 columns.
I need to load 2500 records with 8 to 10 columns and doing it like:

1st attempt to load data: using class product:

 using (SqlConnection conn = new SqlConnection(cString.c_String))
            {
                conn.Open();
SqlCommand cmd = new SqlCommand(sqlCommand, conn);
                rdr = cmd.ExecuteReader();
                while (rdr.Read())
{
-- Product p =new Product {.....};
myGrid.Add(p);
}

Second attempt:
                 SqlDataAdapter sd = new SqlDataAdapter(new SqlCommand(sqlCommand, conn));
                 DataTable dt = new DataTable();
                 sd.Fill(dt);
                dg.ItemsSource = dt.DefaultView;


Second is little bit faster i guess, but still tooks much time to load.
I have also tested only window loading time and it took ~1sec to load (only window, with listview with items from db)
Unfortunately with gridView it tooks 5 to 10 sec.

Question is:
Is there any way to (for example) load only first 50 records, and when i scroll down load more?
Or maybe there's example for gridView (WPF!) paging ?


Thanks for answer,
Adam.

Hello,
I have simple  question.
How to change the the tool tip  for all buttons in the DataForm?
Thanks
hiwa

I have an wpf page with radgridview control and some radmaskednumericinput controls.the question is  whille Selection changed event of radgridview of every row i need to enter new data radmaskednumericinput control on every row and the data should not change till closing the page .

I found this article without answer. I have the same problem can anybody help me?

I am using Telerik's WPF controls. In particular the DataForm control. I am trying to bind it to an object that has the following make up.

public class FrequencyMap : BindableBase
{
    private Guid id;

    public Guid ID
    {
        get { return id; }
        set
        {
            id = value;
            OnPropertyChanged();
        }
    }

    private string procedureCodeId;

    public string ProcedureCodeId
    {
        get { return procedureCodeId; }
        set
        {
            procedureCodeId = value;
            OnPropertyChanged();
        }
    }

    private FrequencyChoice frequency;

    public FrequencyChoice Frequency
    {
        get { return frequency; }
        set
        {
            frequency = value;
            OnPropertyChanged();
        }
    }

    private DateTime effectiveDate;

    public DateTime EffectiveDate
    {
        get { return effectiveDate; }
        set
        {
            effectiveDate = value;
            OnPropertyChanged();
        }
    }

    private DateTime? terminateDate;

    public DateTime? TerminateDate
    {
        get { return terminateDate; }
        set
        {
            terminateDate = value;
            OnPropertyChanged();
        }
    }
}

and then the FrequencyChoice object looks like this:

    public class FrequencyChoice : BindableBase
{
    private int id;

    private string modifiedUser;

    public int ID
    {
        get { return id; }
        set
        {
            id = value; OnPropertyChanged();
        }
    }

    private string code;

    public string Code
    {
        get { return code; }
        set
        {
            code = value; OnPropertyChanged();
        }
    }

    private string name;

    public string Name
    {
        get { return name; }
        set
        {
            name = value; OnPropertyChanged();
        }
    }

    private string description;

    public string Description
    {
        get { return description; }
        set
        {
            description = value; OnPropertyChanged();
        }
    }

    private string calculationDescription;

    public string CalculationDescription
    {
        get { return calculationDescription; }
        set
        {
            calculationDescription = value; OnPropertyChanged();
        }
    }

    private DateTime inactiveDate;

    public DateTime InactiveDate
    {
        get { return inactiveDate; }
        set
        {
            inactiveDate = value; OnPropertyChanged();
        }
    }

    public string ModifiedUser
    {
        get
        {
            return this.modifiedUser;
        }
        set
        {
            this.modifiedUser = value;
            OnPropertyChanged();
        }
    }

}

This works quite well except for the Frequency property. How do I get that to work properly(I need name property to be in drop down list box for choose). Do I have to use an Enum like this article? Data Forms in your XAML If so how would I link the two?

Thank you for your help.
Ondrej

I am raising this concern as the Context Menu present in WPF does not work for web browser control.
Does the RadContextMenu help us in achieving custum context menu in WPF web browser control?