Questions on UI for WinForms Forum

3 answers

313 views

Grid does not auto scroll to row when selected

When I search for an item in a row, the grid does not scroll down to the selected row.

The row is selected, but I have to manually scroll down to the selected row.

I have AutoScroll = true

Thanks

If filterTextBox.Text <> "" Then

For Each row As GridViewDataRowInfo In LotDetailsDataGrid.Rows

If (filterTextBox.Text.Equals(row.Cells("ISBN_13").Value.ToString)) Then

row.IsSelected = True

Exit For

End If

Next

End If

GridView

answered on 22 May 2012

4 answers

380 views

ComboBox: ReadOnly - My solution

Hello all,
I want to make ComboBox Readonly, i don't find a good Solution in the forum.
I don't to use Skin...
So
I implemented a simple code !!! that i maked with help on demo:

    
                        if (ZoneText is RadComboBox)  
        
                        {  
        
                            ((RadComboBox)ZoneText).EnableViewState = false;  
        
                            if (mode == ModeEdit.ADD)  
        
                            {  
        
                                ((RadComboBox)ZoneText).BackColor = Color.White;  
        
                                ((RadComboBox)ZoneText).ShowToggleImage = true;  
        
                                //((RadComboBox)ZoneText).ShowDropDownOnTextboxClick = true;  
        
                                //((RadComboBox)ZoneText).ChangeTextOnKeyBoardNavigation = true;  
        
                                ((RadComboBox)ZoneText).OnClientKeyPressing = "";  
        
                                ((RadComboBox)ZoneText).OnClientDropDownOpening = "";  
        
                                ((RadComboBox)ZoneText).EnableTextSelection = true;  
        
                            }  
        
                            if (mode == ModeEdit.BROWSE)  
        
                            {  
        
                                ((RadComboBox)ZoneText).BackColor = Color.FromName("#E6E6E6");  
        
                                ((RadComboBox)ZoneText).ShowToggleImage = false;  
        
                                //((RadComboBox)ZoneText).ShowDropDownOnTextboxClick = false;  
        
                                //((RadComboBox)ZoneText).ChangeTextOnKeyBoardNavigation = false;  
        
                                ((RadComboBox)ZoneText).OnClientKeyPressing = "CancelKeyPress";  
        
                                ((RadComboBox)ZoneText).OnClientDropDownOpening = "CancelDropDown";  
        
                                ((RadComboBox)ZoneText).EnableTextSelection = false;  
        
                            }  
        
                            if (mode == ModeEdit.EDIT)  
        
                            {  
        
                                ((RadComboBox)ZoneText).BackColor = Color.White;  
        
                                ((RadComboBox)ZoneText).ShowToggleImage = true;  
        
                                //((RadComboBox)ZoneText).ShowDropDownOnTextboxClick = true;  
        
                                //((RadComboBox)ZoneText).ChangeTextOnKeyBoardNavigation = true;  
        
                                ((RadComboBox)ZoneText).OnClientKeyPressing = "";  
        
                                ((RadComboBox)ZoneText).OnClientDropDownOpening = "";  
        
                                ((RadComboBox)ZoneText).EnableTextSelection = true;  
        
                            }  
        
                        }

    
                public enum ModeEdit  
        
                {  
        
                    ADD,  
        
                    EDIT,  
        
                    BROWSE  
        
                }

and finnaly
i make 2 simple function JS !!!

    
            <script type="text/javascript">  
        
                function CancelDropDown(sender, eventArgs) {          
        
                     eventArgs.set_cancel(true);  
        
                }    
        
                function CancelKeyPress(sender, eventArgs)  
        
                {  
        
                    eventArgs.get_domEvent().keyCode = 
null;

                }  
        
            </script>

Code not complexe, but make combo like textBox,
enjoy!!!!

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 22 May 2012

9 answers

410 views

Is there any balloon control or similar?

Hello,
I'm wondering if is there any control that display a balloon over another control to display information. Something similar to the notices of windows SO system tray but in our aplication and over a button for example, and of course more powerfull than a simple tooltip. Where I can insert controls like buttons, textbox, etc...
Thanks!

General Discussions

answered on 22 May 2012

1 answer

401 views

Removing borders around button element

Hi
When I add button element to my ribbon group there are borders around it. How can I remove borders?

RibbonBar

answered on 22 May 2012

4 answers

340 views

GridView Column with Multiple Control Types?

Hello,

I am currently researching possibilities for using multiple control types in a single GridViewDataColumn. Namely, we need to be able to use RadComboBox and RadTextBox interchangeably in a single column.

I would just like to know if Telerik has encountered this question before, and if there are any reasons why this wouldn't be possible. If so, how might you suggest a "best practice" for going about this. I certainly have found very little -- if any -- scenarios of others needing this functionality.

I appreciate any advice that can be offered.

Best Regards,

Daryl

GridView

answered on 21 May 2012

1 answer

207 views

Node in TriState mode get wrong CheckState.

I use Telerik Version=2011.3.11.1219 and try use TreeView control with TriStateMode.

Question 1: Also I want to prevent checking node due some conditions - for example, if node.ImageKey ="class_grey" (some picture from imagelist container).

Private Sub RadTreeView1_NodeCheckedChanging(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.RadTreeViewCancelEventArgs) Handles RadTreeView1.NodeCheckedChanging

If Not e.Node.Checked AndAlso e.Node.ImageKey = "class_grey" Then

e.Cancel = True

End If

End Sub

If I make that tree:

and try to check node "Node1" - I get this situation:

But it is obviously wrong! Nodes "Node1" and "Node8" have wrong state mode ("On" instead of "Indeterminate")
It should be like that (which I got if uncheck/check node "Node9"):

How can I fix that?

Question 2: How can I change view of checkbox in TriState mode? For example, I would like to change view for "Indeterminate" mode from filled green box to red tick.

Treeview

answered on 21 May 2012

1 answer

106 views

Grouping child entities in grid view

Hi there -

I'm new to Entity Framework and still working my way through the gridview control. I'm not sure where to put this question, so I figured I would start here.

I have an entity framework (EF) with a header-detail model. When I perform the linq query with an include, I want to display the sub entities (the details) in the grid. Would be even nicer if I group group by the details (all in one grid).

So my questions may be, how do I write/use the linq query to bring back the headers and group the details within the same grid. Here is what I have so far:

Private Sub loadLotDetails(PO_Number As String)

Dim query = From l In context.Lot_Header.Include("Lot_Detail")

Where l.Lot_Number = PO_Number And l.Lot_Process_Status <> "90"

Select l

lotDetailsGridView.DataSource = query

End Sub

I appreciate any information or direction possible.

Thanks
Bob

GridView

answered on 21 May 2012

4 answers

502 views

ObjectContext instance has been disposed using EF 4.0

OK - So I'm still new to all this EF and Telerik stuff. However after doing research I'm sure it's not a Telerik control issue. In any case, I thought I would start here for help.
I have a simple Entity relationship (Lot_head and Lot_Detail)

When I execut the following code:

Private Sub btnSearchPO_Click(sender As System.Object, e As System.EventArgs) Handles btnSearchPO.Click

LotDetailsDataGrid.DataSource = getLotDetails(PurchaseOrderTextBox.Text)

End Sub

Private Function getLotDetails(lotNumber As Integer) As List(Of Lot_Detail)

Using context As New Three_Way_MatchEntities

Dim lot = (From ld In context.Lot_Detail

Where (ld.Lot_Number = lotNumber)

Select ld).ToList

Return lot

End Using

End Function

The grid populates the data correctly, however when I scroll to the end of a row, it throws the "The ObjectContext instance has been disposed and can no longer be used for operations that require a connection." exception.

Now I understand that since I am using lazing loading and using the 'Using' statement, the context has been disposed. I'm also assuming that the datagrid must rely on having that context left open. As many have mentioned you should keep the context open for only as long as you need it. If that's the case, how would you write this example?

Thanks for the help!
Bob

GridView

answered on 21 May 2012

2 answers

207 views

DropDownList Shape RoundRect c#

Hi there,

I am writing to you to understand if you could help me as to the following.

Currently I am developing an application and I am exploiting RAD WinControls in C#.

In one form I have a few text boxes with the TextBoxElement.Shape set to RoundRect.

I would need to do the same in a couple of dropdown lists and in one datetime picker.

Therefore I am trying to set the related properties in the same way:

e.g. ddlDropDown.DropDownListElement.Shape = new Telerik.WinControls.RoundRectShape();

Yet in this case the displayed items show some white angles (see attachment)

Would you please help me to understand how to fix that, i.e. how to delete or hide the white angles?

Thanks in advance for your kind collaboration

Best regards

Davide

DropDownList

answered on 18 May 2012

1 answer

140 views

RadLabel Size is 0

Is there any way to get the RadLabel size when it is created via runtime?

I am trying to calculate the height of a container control by summing the height properties of the controls added to the container.

When create a new object instance of a RadLabel in code such as this:

Dim p_Label as New RadLabel

. . the width and height properties are set to 0 and remain at zero even after setting the text property.

I was looking for some type of Resize method that could be called after setting the .Text and .Font property, but have been unable to find such a way to cause the control to recalculate its size.

A point of clarification: after adding the RadLabel to a container the height property is always 1, which is not really the case.

Label

answered on 17 May 2012