Hi Now I'm getting one error while opening multiple PDF files and displaying them to RadBook.

I'm getting the error during navigating pages or open PDF.

"Object reference not set to an instance of an object."

Error occurs at Telerik.Windows.Documents.UI.FixedDocumentSinglePagePresenter.LoadPageContent.AnonymousMethod__1()

Following is the souce code


        private ObservableCollection<AttachFileInfo> _attachedFiles;
        public ObservableCollection<AttachFileInfo> AttachedFiles
        {
            get
            {
                return _attachedFiles;
            }
            set
            {
                if (_attachedFiles != value)
                {
                    _attachedFiles = value;
                    NotifyPropertyChanged("AttachedFiles");


                    OpenPDFFiles();
                }
            }
        }


        private IEnumerable<RadFixedPage> _pages;
        public IEnumerable<RadFixedPage> Pages
        {
            get
            {
                return _pages;
            }
            set
            {
                if (_pages != value)
                {
                    _pages = value;
                    NotifyPropertyChanged("Pages");
                }
            }
        }

if (AttachedFiles != null)
            {
                int step = 0;


                if (attachDocumentStream != null)
                {
                    foreach (Stream attachStream in attachDocumentStream)
                    {
                        attachStream.Close();
                        attachStream.Dispose();
                    }
                }


                attachDocumentStream = new List<Stream>(AttachedFiles.Count);
                foreach (AttachFileInfo AttachFile in AttachedFiles)
                {


                    attachDocumentStream.Add(File.Open(AttachFile.FilePath, FileMode.Open));
                    doc = new PdfFormatProvider(attachDocumentStream[step], FormatProviderSettings.ReadOnDemand).Import();
                    DataStore.TotalPages = DataStore.TotalPages+ doc.Pages.Count;
                    Pages = Pages.Concat(doc.Pages);


                    step = step + 1;
                }
            } 

I am using a RadTreeListView and I want to have certain nodes (based on object type) expanded the first time they are loaded. I have tried several ways to do this but they all seem to have issues. I think most of the issues have to do with the fact that the row is not actually created or loaded at the time I try to expand it. I found the example used to expand all rows and that works but my tree is way to big to do that all the time.

My current approach is to handle the RowLoaded event and if the e.DataElement meets the criteria call TreeListView.ExpandHierarchyItem(e.DataElement). This actually works except the TreeListView is initially blank (except with a scrollbar on the bottom). If I click the scoll bar the tree shows up (and the scroll bar goes away). The other issue with this is that if one of the expanded nodes is a child of a node that is not expanded the whole tree disappears never to return.

Here is my RowLoaded event handler (not terribly complicated).

        private void TreeView_RowLoaded(object sender, Telerik.Windows.Controls.GridView.RowLoadedEventArgs e)
        {
            if ((e.DataElement != null) && (e.Row is GridViewRow) && !(e.Row is GridViewNewRow))
            {
                if (e.DataElement is myObjectType)
                {
                    this.TreeView.ExpandHierarchyItem(e.DataElement);
                }
            }
        }

Is there a better way to do this?

Thanks
Dave Goughnour

We have a RadGridView populate with some items. If we scroll to the bottom and delete some items the vertical scrollbar disappear and all the items are moved to the top and at the bottom remain white spaces.  I’m using RadControls for WPF Q1 2011 SP1 and we are obligated by the client to use this telerik version so if this was fixed in future releases please provide me a workaround solution.

Best regards,

Cotutiu Lucian.

This bug exist in multiple examples from demo application(Appearance/Columns, Scrolling, Date Formatting, and for Commands using ctrl for multi selection). If you move to the bottom of the grid from vertical scrollbar and delete one or multiple items from the bottom, on the top of the grid white spaces appear. I’m using RadControls for WPF Q1 2011 SP1 and we are obligated by the client to use this telerik version so if this was fixed in future releases please provide me a workaround solution.

Best regards,

Cotutiu Lucian.

Hi all,

I am having an Issue with the RadTreeView.  I am dragging items from one treeview to another, but inside the PreviewDragEnded method setting e.Handled=true does not stop the drag.  I also see that the default drag/drop behavior is still active.

Any ideas?

Cheers,
Brandon

Hi,
I have a radDataFilter and radGridView. On a first place data is not loaded. I want after user put a some filter ( example: username start with: sa) to load data from the server based on the filter condition and show it on the grid.

I not see how to do this. In FilterDescriptors_ItemChanged event i capture what user ask to filter, send a request to load a data but it not show on the grid.

Please advise more better way to do this.

Best regards,
Saykor

I currently have a RadGridView that is bound to a collection of objects. One of those objects contains a property that is calculated based on a user-supplied value, so whenever the user changes the value, the value in every row changes as well.

I am able to manually update the Footer Aggregate using .CalculateAggregates(), however if the Grid is grouped, this does not update the aggregates that are located in the group totals.

How can I make the RadGridView re-calculate the aggregates in the grouped records? The relevant bits of code are below

Hi,


I'm using the drag and drop functionality of the RadTreeView, with a hierarchical list of transportation rides with multiple addresses.
I've managed to add some logic to make sure no rides can be added to addresses and stuff like that, using the existing handlers:



I do, however, have 2 problems/questions when using the drag and drop between tree views:

1. The preview, when dragging, is shown but stays empty.
2. How can I change the tooltip that is shown when dropping is possible? I would like to change the language of the text and add custom text to it.

(these problems are shown in the screenshot in attachment)

Hope someone can help! Thanks in advance.

Best regards,
Pieter Jan

Hello,

I read about the sampling for radchart.  Is this available for chartview for a barseries?  If so, how would I go about using it?

Thanks,
Eric

I need to print my datagrids. I looked to WPF Control Examples and found appropriate one. However it prints data in such a way that first column overlaps itself.

I have attached sample file. This file comes right from Telerik Examples.

I tried it with XPS printer and PDF Creator printer and effects where the same.

How can I print the whole datagrid?