Questions on UI for WinForms Forum

1 answer

1.4K+ views

RadGridView - save changes to a rows data back to database

Hi there

I'm trying to achieve row-level validation and saving. The validation is working OK and and I can reject invalid user-input at the row level.

However I'm a bit lost as to how which event to use to catch the fact a row has changed so I can then call dataset.savechanges().

I've tried -
RowsChanged event but it fires when the grid is first populated with data
RowValidated event but it fires AFTER I leave the row that was updated
RowValidating event which is nearly there but it isn't until it's finished that I can detect changes in my dataset using datatable.getchanges()

The basic point is that i'd like remove the need for a Save button that will save ALL changes to the data in the grid. The reason for this is that the database has lots of users and I want to maintain concurrency. If I can get the database record to change when a ROW is updated then there is less chance of concurrency issues.

Thanks in advance

GridView

answered on 12 Apr 2011

1 answer

198 views

Control Collection

I have problem making array of telerik controls or converting or casting them to Windows forms controls, can anyone help?

when I try to search telerik control in control collection,like this

private void LoopControls(Control.ControlCollection controls)

{

foreach (Control control in controls)

{

if (control is RadButtonElement)

{

}

system generates following execption

Cannot convert type System.Windows.Forms.Control to Telerik.WinControls.UI.RadButtonElement

General Discussions

answered on 12 Apr 2011

2 answers

508 views

treeview clearing selected nodes

Hi
i am using telerik q3 2010 treeview for winforms

in my project i select multiple nodes in the treeview and user can select different nodes depending on his choice but it seems that the old selected nodes is not clearing and keep saving the old selected nodes
i used :
radtreeview.selectednodes.clear()
but it seems it is not clearing the selected nodes is there any code that could be used to clear selected nodes
any help is appreciated
regards,

Treeview

answered on 11 Apr 2011

12 answers

255 views

Unable to add column names to child/parent template in Hier. Grid

Hi,

I am getting an error throw when I try to add the column names to the child and parent relations in a hierarchical gridview. I am using your WINForms sample, except that I changed the datasource to Entity Framework 4 .edmx, and am using .Net 4.0 on a WIN7 OS. I've attached 2 files, 'Form1' shows the results. All works fine, except the child grids are not linked to the ContactID on the grid (the relationships are defines properly in the .edmx). 'Relations' shows the results I'm getting when I try to set them in the properties window.

Thanks

Steve

GridView

answered on 11 Apr 2011

3 answers

177 views

Context Menu's

Hello

Can anybody tell me how I can detect where the context menu is clicked, in particular I'm looking to detect a right click in the blank space below rows (see attached file.)

The following snippet stops the right clicking on the header, and allows right clicking on a row, but I can't seem to find out when the "whitespace" is clicked? - Any clues?

Many thanks

Terry

Private Sub RadGridView1_ContextMenuOpening(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.ContextMenuOpeningEventArgs) Handles RadGridView1.ContextMenuOpening

Dim i As Integer = 0

Do While i < e.ContextMenu.Items.Count

e.ContextMenu.Items.Clear()

i += 1

Loop

If TypeOf e.ContextMenuProvider Is GridHeaderCellElement Then Exit Sub

Dim customMenuItem1 As RadMenuItem = New RadMenuItem()

Dim customMenuItem2 As RadMenuItem = New RadMenuItem()

Dim customMenuItem3 As RadMenuItem = New RadMenuItem()

customMenuItem1.Text = "Insert Company History"

customMenuItem2.Text = "Remove Company History"

customMenuItem3.Text = "Add/Edit Roles..."

Dim separator As RadMenuSeparatorItem = New RadMenuSeparatorItem()

e.ContextMenu.Items.Add(customMenuItem1)

AddHandler e.ContextMenu.Items(0).Click, AddressOf RowInsert

e.ContextMenu.Items.Add(customMenuItem2)

AddHandler e.ContextMenu.Items(1).Click, AddressOf RowDelete

e.ContextMenu.Items.Add(separator)

e.ContextMenu.Items.Add(customMenuItem3)

If RadGridView1.RowCount = 0 Then

e.ContextMenu.Items(0).Visibility = ElementVisibility.Visible

e.ContextMenu.Items(1).Visibility = ElementVisibility.Hidden

e.ContextMenu.Items(2).Visibility = ElementVisibility.Hidden

End If

End Sub

GridView

answered on 11 Apr 2011

1 answer

207 views

Problem with ToolWindow ToolStrip or DockStrip

Hi,

I want to add the some Combobox,TextBox and Button on the DockTabStrip or Top of the ToolWindow of RadDock Control.
But i am not getting any way to do this.

And my anathor problem is that i rounded the shape of the e.DockWIndow with FIllPrimitive and BorderPrimitive properties that rounded
the upper portion of the ToolWindow but back portion of the control is looking odd/rectangle.

The Snap Shot of my problem with code over it is attached with this thread (dock.png).

Please review this problem as soon as possible.

private void radDock1_DockStateChanged_1(object sender, DockWindowEventArgs e)

{

try

{

e.DockWindow.Text = strCaption;

FillPrimitive fill = (FillPrimitive)((ToolTabStrip)e.DockWindow.DockTabStrip).CaptionElement.Children[0];

BorderPrimitive border = (BorderPrimitive)((ToolTabStrip)e.DockWindow.DockTabStrip).CaptionElement.Children[1];

fill.AutoSize = false;

fill.Size = new Size(e.DockWindow.Width, 35);

border.Shape = this.toproundedshape;

}

catch (Exception)

{

throw;

}

Dock

answered on 11 Apr 2011

3 answers

89 views

How we can add Controls or User Controls on e.DockWindow.DockTabStrip?

Hi,

There is any way to add user controls or controls on the e.DockWindow.DockTabStrip or at tilebar of tool window.

Dock

answered on 11 Apr 2011

12 answers

198 views

Exception- AvlEnumerator:version mismatch

Hello,

I have recently upgraded to "RadControls for WinForms Q2 2010 SP2" and since then, occasionally, I'm getting this exception:

AvlEnumerator:version mismatch

The relevant call stack is:

at Telerik.Collections.Generic.AvlTree`1.Enumerator.CheckVersion()
at Telerik.Collections.Generic.AvlTree`1.Enumerator.MoveNext()

What can be the problem? I couldn’t find documentation for it.

Thanks,

General Discussions

answered on 09 Apr 2011

2 answers

130 views

Hierarchy Template Problem

I've followed this tutorial for binding hierarchy data:

http://www.telerik.com/help/winforms/gridview-hierarchical-grid-tutorial-binding-to-hierarchical-data.html

The data is displaying properly, and the Parent level template works as it should. However, the child level template is not working at all. Whether I use the grid property builder or the template collections interface, I can not customize which columns are visible or change header names etc. It always shows every single column from the table adapter. I need to be able to use foreign keys which are invisible, not to mention renaming headers or resizing columns.

Thanks for the help.

GridView

answered on 08 Apr 2011

1 answer

97 views

DockWindows not visible in design mode

Hi,
in my winforms application there is one form with many tabbed documents. At the moment I see only the first 3 or 4 tabbed documents. How I can reach any tabbed document at design time to customize the content?
Kind regards.
Christian

Dock

answered on 08 Apr 2011