Questions on UI for WinForms Forum

3 answers

191 views

SelectedNodes on treeview count is wrong

I have a treeview where allow multiselect is set to true. When I select one node, the SelectedNodes.Count = 1 in the Selected event handler.

I then select a different node. I am not performing a multiselect or holding the shit or ctrl key, and in the Selected event handler the SelectedNodes.Count = 2.

I thought that the Selected event handler fired after the selection occurred. If so, how is it that my count of SelectedNodes is anything other then 1?

Is this a bug or is there a work around for this?

Treeview

answered on 12 Sep 2008

1 answer

446 views

RadTextBoxElement Max Length Property

Hi,
I have to added a custom elements (RadTextBoxElement) to grid cells on the CellFormatting event at runtime.

    
            RadTextBoxElement textbox = new RadTextBoxElement();  
        
            textbox.Alignment = ContentAlignment.MiddleCenter;  
        
            textbox.KeyPress += new KeyPressEventHandler(textbox_KeyPress);  
        
            textbox.TextChanged += new EventHandler(textbox_TextChanged);  
        
            e.CellElement.Children.Add(textbox);

I would like to limit the value of textbox not over 99 but i can't set the max length property of the RadTextBoxElement.
Can you help me for solve this problem ?

GridView

answered on 12 Sep 2008

1 answer

108 views

RadTextBoxElement (Fix Max Length)

Hi,
I have to added a custom elements (RadTextBoxElement) to grid cells on the CellFormatting event at runtime.

    
            RadTextBoxElement textbox = new RadTextBoxElement();  

            textbox.Alignment = ContentAlignment.MiddleCenter;  

            textbox.KeyPress += new KeyPressEventHandler(textbox_KeyPress);  

            textbox.TextChanged += new EventHandler(textbox_TextChanged);  

            e.CellElement.Children.Add(textbox);

I would like to limit the value of textbox not over 99 but i can't set the max length property of the RadTextBoxElement.
Can you help me for solve this problem ?

GridView

answered on 12 Sep 2008

1 answer

91 views

Tooltips

hi :o)

I have a combo box which displays a list of available subject areas for a university. It is populated from a table with 3 fields.

Id, SubjectArea, Description.

Is it possible to show a tooltip that contains the field "Description" that relates to the "SubjectArea" item you are hovering over.

I hope this makes sense :o)

Thank you so much for your help

Tim :)

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 12 Sep 2008

1 answer

180 views

Scrolling Problems

I 'm working on a program that uses a RadTabStrip. The program has two static tabs and then allows the user to add more at runtime. Once the new tabs are added, they cannot be removed, but they can be hidden.

I am having two problems:

The first problem happens when the user adds several tabs that exceed the width of the window and the scroll buttons become visible. If the user scrolls over to the tabs on the right and then hides some tabs, the scroll buttons disappear and there is no way to easily get to the tabs that have scrolled off the left side of the form.

I figured that I would program my own scroll buttons and ran into the scond problem. My buttons work well except for scrolling to the left most tab. When I attempt to scroll to the left most tab, the program gets cought in an endless loop.

I have an example program you can download from my website. It is a very small program that demontrates the problem. It has a RadTabStrip and several buttons. The first button allows adding tabs. The second button hides the tabs one at a time. The third button unhides tabs one at a time. The fourth button attempts to scroll to the left.

Run the program
Hit the "Add Tab" button four or five times until the scroll buttons pop up.
Use the scroll buttons to scroll all the way over to the right until the right scroll buttons disables itself.
Hit the "Hide Tab" button two or three times until the scroll buttons disappear.
Note that there is no easy way to get to the left most tabs.
Hit the "Scroll Left" button a few times to try to get to the left most tab.
When you get to the left most tab the program will now be cought in an endless loop.

I hope this example illustrates the problems. Please let me know if you have any questions.

Ideally, I would like to be able to have the scroll buttons visible all the time. Also, I would like to be able to programatically scroll to the left most tab without getting cought in a loop. However, I'm willing to listen to any suggestions or work arounds.

Thank you for your help.

Tabstrip (obsolete as of Q2 2010)

answered on 12 Sep 2008

1 answer

146 views

[Solved] Displaying Asterisk after Row Edit

I was wondering how to make a row display an asterisk when it has been modified?

Thanks.
Brandon

GridView

answered on 12 Sep 2008

1 answer

90 views

2008Q2 RadButtonElement reappears when RadToolStripItem is moved during runtime

Hello,

The following issue occurs with 2008Q2 version of the toolstrip.

I have set have a toolbar with more than one RadToolStripItems. These items have some RadButtonElements placed upon them.

During the application life cycle, some of these buttons are hidden by setting the Visibility property to ElementVisibility.Hidden

However once you move the RadToolStripItem containing the hidden button during runtime, because for example you want to reorder your toolstrip, the button suddenly reappears.

Please notifify me of your findings.

Kind regards,

Jack

Toolstrip (obsolete as of Q3 2010)

answered on 12 Sep 2008

1 answer

174 views

Image in Header Problem

Hello,

After your previous support, I can add images to the row header.

Now I'm having some problems when I activate the group by funcionalities. For example, after spending some time analising the code, I founded that if I want to use images in the header row, I need to change ShowRowHeader = false.

Now I'm having another problem. In same Grids, I get the error: "Object reference not set to an instance of an object." in the GREEN row

Here Is the code that i'm using:

Dim header As GridTableHeaderRowElement = TryCast(TryCast(Me.DetailedProposals.GridElement, GridTableElement).TableBodyElement.Children(0), GridTableHeaderRowElement)

Me.DetailedProposals.ImageList = Me.ImageList1

For Each element As Telerik.WinControls.RadElement In header.Children

Select Case TryCast(element, GridHeaderCellElement).Text

Case "Molde"

TryCast(element, GridHeaderCellElement).ImageIndex = 0

TryCast(element, GridHeaderCellElement).Text = ""

Case "Print"

TryCast(element, GridHeaderCellElement).ImageIndex = 1

TryCast(element, GridHeaderCellElement).Text = ""

Case "EMail"

TryCast(element, GridHeaderCellElement).ImageIndex = 2

TryCast(element, GridHeaderCellElement).Text = ""

Case "Intranet"

TryCast(element, GridHeaderCellElement).ImageIndex = 3

TryCast(element, GridHeaderCellElement).Text = ""

End Select

element.Alignment = ContentAlignment.MiddleCenter

Next

Can you help? This code works in other radgrid and all columns have name/text

Thank You.
Luis Mauricio

GridView

answered on 11 Sep 2008

1 answer

92 views

2008Q2 ImageAligment, TextAlignment don't work

Hello,

We've just purchased your product.

Sofor I have encountered a issue with the image and text alignment of the ListBoxItems, shown in the following code snippet:

Image image = this.GetImageFromImageList(menuItemData.ImageName);

image = ResizeImage(image,

new Size(32, 32));

RadListBoxItem result = new RadListBoxItem(menuItemData.Text);

result.Image = image;

result.DisplayStyle = Telerik.WinControls.

DisplayStyle.ImageAndText;

result.TextImageRelation =

TextImageRelation.ImageBeforeText;

result.TextAlignment =

ContentAlignment.MiddleLeft;

result.Alignment =

ContentAlignment.MiddleLeft;

result.ImageAlignment =

ContentAlignment.MiddleLeft;

The alignment settings don't have any visual effect, no matter what is set to them. My desire is to have the text alligned middle left as to its image. The Aligment however is always performed as TopLeft.

Please let me know how to solve this (if possible)

Kind regards,

Jack

General Discussions

answered on 11 Sep 2008

3 answers

167 views

Invalid character & Back Space behavior

I have read earlier post on invalid character (where there is no match in list items)and code from a user to handle the invalid character.

I suggest "AllowFreeText" boolean property for the combo box. If it is set to "False", there should be a beep and not accept the character which results in no match. Also Backspace should remove a user typed characer and append the matching list item.

I use the following VB (AutoCompletionMode - "Append") code to handle Invalid character and backspace

Private Sub cboDepartment_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles cboDepartment.KeyUp

Dim Lg As Integer
Dim ComboItem As RadComboBoxItem

Lg = sender.text.length

If Lg = 0 Then
Exit Sub
End If

If (sender.finditem(sender.text)) Is Nothing Or e.KeyCode = 8 Then
    If Lg = 1 Then
        sender.text = ""
        Exit Sub
    Else
        sender.text = sender.text.substring(0, Lg - 1)
    End If

    If e.KeyCode <> 8 Then
        Beep()
    End If

    ComboItem = sender.finditem(sender.text)
    sender.text = ComboItem.Text
    sender.SelectionStart = Lg - 1
    sender.SelectionLength = sender.Text.Length - (Lg - 1)

End If

End Sub

Better code suggestions will be highly appreciated.

Regards ... DP

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 11 Sep 2008