Questions on UI for WinForms Forum

3 answers

826 views

I've been working on building a treeview that's basically the navigation control for the application, and I've run into a bit of a question.

When I'm using the events BeforeSelect & AfterSelect, I'm getting the warning that I'm supposed to be using the 'Selected' event. However, the Selected event doesn't have any information attached to it - it implements the standard (object sender, EventArgs e) format, with no information on which node has been selected.

So, that's one issue - what's the best way to get the information I need now? (Which node has been selected?)

2nd issue is this: If the user is on node A and has done some editing for that node, and wants to move to node B, I want to warn them about moving away before saving.. So, I want to capture the 'trying to move away' event and cancel the move. How do I do this?

Treeview

answered on 21 Mar 2011

3 answers

136 views

undoing a move-node-operation

hello,

i want a msgbox to appear when a node is moved to another. the user should confirm the operation or cancel it.

i tried to handle it by using the dropped event but i cannot move the moved node back to its origin parent node...

how can i handle it?

thanks, andreas

Treeview

answered on 21 Mar 2011

4 answers

196 views

Binding generic Collection to WinForms RadTreeView

Hi,

I am looking at trying to bind a System.Collections.Generic List to the RadTreeView. Are there any good examples of how to do this?
Help!!

Greg

Treeview

answered on 21 Mar 2011

5 answers

331 views

Insert/REmove TreeNode performance

I have a RadTreeView that can get up to 4 levels deep. The problem I am having is that adding and removing nodes is extremely slow. Unfortunately my current position doesnt allow me to write a batch function to insert/remove nodes in groups. I tried using the BegingUpdate() and EndUpdate() and this helped, and by helped i mean it took my CPU utilization from 100% to 50%. Any suggestions on how to improve this?

Treeview

answered on 21 Mar 2011

2 answers

232 views

RadDropDownMenu

Hi, I'm working with two monitors. When I move the treeview to the secondary monitor, the context menu of every node is displayed in the main monitor. It occurs too with the control demo installed with the components, so, I suposs that it's a bug.

Another thing, text displayed in the context menu are not aligned. I change every TextAlignment of each item, but what are displayed at runtime is very different.

Thanks.

Treeview

answered on 21 Mar 2011

4 answers

237 views

Radiobuttons not working together

Hi
I have placed a RadTreeView on a form and then in the load event have the following:

    
                        for (int i = 0; i < 10; i++)  
        
                        {  
        
                            RadTreeNode treeNode = new RadTreeNode(i.ToString());  
        
                            treeNode.ShowRadioButton = true;  
        
                            radTreeView1.Nodes.Add(treeNode);  
        
                        }

The problem is that when I click on one item in the list and then another, the first one is not deselected and I end up with all the radio buttons selected. The sample you provide does not have this problem.

Please could you explain how to achieve the effect I want - a list of (top level) radio buttons.

Thanks

Best regards

Marek

Treeview

answered on 21 Mar 2011

4 answers

274 views

Self referencing tree

Hi.
I am using the Rad Treeview for Win Forms.
I am trying to bind the tree to a datatable.
The table consists of columns that include ID and ParentID
However, the ID and ParentID are GUID's. Am I correct in assuming that the columns need to be integers? As the binding is giving me weird errors (Unable to cast object of type 'System.Windows.Forms.RelatedPropertyManager' to type 'System.Windows.Forms.CurrencyManager'.)

What do you suggest I do to fix this? Is my only option to go and create a method that will loop through each of these rows in my table and convert their GUID's into integers and match up the related ParentID's?

Thanks for any help,
Kris

Treeview

answered on 21 Mar 2011

2 answers

187 views

exportToPdf style

Hello,

i have an issue with exporttopdf.
even when i set the scale, fittopagewidth properties the result (pdf) looks everytime the same.
my code:

ExportToPDF pdf = new ExportToPDF(this._rg);

pdf.ExportVisualSettings = true;

pdf.Scale = 0.4f;

pdf.FitToPageWidth = true;

//pdf.TableBorderThickness = 0;

pdf.RunExport(path);

thx for help

GridView

answered on 21 Mar 2011

8 answers

703 views

RadTreeView - Binding to Custom Business Objects

Has anyone been able to get a RadTreeView to bind to custom business objects?
I followed the example in the help but it only seems to show my first level artist nodes. In fact it doesn't even show the top level 'Artists' node.

I was also initially getting null object errors adding to the RelationBindings collection. It seems the collection is not initialized until you call some other method like RadTreeView.DataSource.

The example also only seems to use a single binding source and then uses compound property references to navigate the sub-relationships e.g. "Albums.Songs", whereas the DataSet example sets up a different binding source for each type of data.

Also assuming I could get this to work, what is the liklihood that it will be two way. I tried editing the name of a top level node and that seems to push the name back into the source data object. But what will happen if I start dragging and dropping. Is it to much to expect that it will handle this too? I guess that would be problematic for the Artists/Albums/Songs example because you could drag a Song to an Artist. However, I have a need for a generic type hierarchy where all nodes are the same type and so a node can be dragged pretty much anywhere.

Thanks for any input
Martin

Treeview

answered on 21 Mar 2011

2 answers

216 views

[Solved] How can reduce loading time?

Hi....

i have developed one software using telerik win form controls.but while running that software it takes more time to load each form...

why it takes more time?is it reason of loading dll files?

what is the problem and how can reduce the loading time.......

pls help me....

General Discussions

answered on 21 Mar 2011