Questions on UI for WinForms Forum

11 answers

1.0K+ views

Hello, Telerik Team.

I have two questions.

1.
I'm using default Telerik theme:

    
            this.ThemeClassName = "Telerik.WinControls.UI.RadGridView";  
        
            this.ThemeName = "ControlDefault";

And now I should implement lines between rows. I tryed solve this with next code:

    
                    void _gridView_CellFormatting(object sender, Telerik.WinControls.UI.CellFormattingEventArgs e)  
        
                    {  
        
                        GridDataCellElement cell = e.CellElement as GridDataCellElement;  
        
                        cell.DrawBorder = true;  
        
                        e.CellElement.BorderTopWidth = 1;  
        
                        e.CellElement.BorderTopColor = Color.LightGray;  
        
                    }

But in this way the last column has black borders.
http://img408.imageshack.us/img408/5127/telerik.png

May be I did anything wrong? How can I enable borders for rows in easy way?

2. I'm using my grid with enabled EnableHotTracking property.
How can I disable animation for HotTracking?
How can I disable animation for grid?

Best regards,
Dan Pristupov

GridView

answered on 13 Jun 2013

1 answer

192 views

[Solved] Strip Align Right + horizontal text

I added to Rad Page View some pages and set the strip alignment to Right
problem is that i wish to display the text of each added page in horizontal instead of default vertical

I would like to have same layout as my attached capture that includes a 3 tabs pages (main,diag,doc)

please help

PageView

answered on 13 Jun 2013

3 answers

269 views

[Solved] Help with waiting bar in radgridview

Hi, im trying to use waiting bars inside radgridview, I sucessfully add the waitingbars to the gridview in the CellFormatting event.
The problems comes when i try to dinamically change the state of the waitingbars individually (startwaiting - stopwaiting) when certain event happend eg. when i click a button i want determined cell to starwaiting or stopwaiting, here is the button code:

private void NewPjButton_Click(object sender, EventArgs e)

{

radGridView1.EndEdit();

radGridView1.Rows[2].Cells[5].IsSelected = true;

radGridView1.Rows[2].Cells[5].BeginEdit();

RadwaitingBarEditor editor = radGridView1.ActiveEditor as RadwaitingBarEditor;

if (editor != null) //this is always null

{

RadwaitingBarEditorElement element = editor.EditorElement as RadwaitingBarEditorElement;

element.StartWaiting();

}

and here the editor and element editor:

public class RadwaitingBarEditor : BaseGridEditor

{

public override void BeginEdit()

{

base.BeginEdit();

this.EditorElement.Focus();

((RadwaitingBarEditorElement)this.EditorElement).WaitingStarted += new EventHandler(RadwaitingBarEditor_WaitingStarted);

}

public override bool EndEdit()

{

((RadwaitingBarEditorElement)this.EditorElement).WaitingStarted -= new EventHandler(RadwaitingBarEditor_WaitingStarted);

return base.EndEdit();

}

void RadwaitingBarEditor_WaitingStarted(object sender, EventArgs e)

{

OnValueChanged();

}

protected override RadElement CreateEditorElement()

{

return new RadwaitingBarEditorElement();

}

public class RadwaitingBarEditorElement : RadWaitingBarElement

{

public RadwaitingBarEditorElement()

{

this.CanFocus = true;

}

public event EventHandler WaitingStarted;

protected override Type ThemeEffectiveType

{

get

{

return typeof(RadWaitingBarElement);

}

protected override void OnPropertyChanged(RadPropertyChangedEventArgs e)

{

base.OnPropertyChanged(e);

if (e.Property == RadTrackBarItem.ValueProperty

&& this.Parent != null

&& this.WaitingStarted != null)

{

this.WaitingStarted(this, EventArgs.Empty);

}

this code just dosent work, the editor is always null. Please if someone can guide me how to do it correctly I will apreciate it so much!!.

Thank you,

GridView

answered on 12 Jun 2013

2 answers

129 views

AllowRemove some and not others

Hello,

I need to find a way to intercept an event, key press, or something. I need to be able delete some nodes in a RadTreeView, but not others. Some nodes are parent "static" nodes (i.e. node analogs to a List<Object>), whereas other nodes are non-static, the Object values themselves.

I'd like to delete the non-static children, and not delete the static ones, during normal "casual" operation. That is, the user is navigating and casually pressed Delete to delete a node.

The poor man's way of doing it will probably work: hook up some context menus, that sort of thing.

Is there a BeforeRemove type event, or otherwise an event that allows me to check and flag a Cancel?

Thank you...

Treeview

answered on 12 Jun 2013

8 answers

261 views

updating problem

Hi,
i wanted to update DataTable and show the data in a grid
i update DataTable in a timer with the interval of 1 second

it updates successfully but when i drag the column header and the update timer ticks the following error occurs

System.NullReferenceException was unhandled

Message=Object reference not set to an instance of an object.

Source=Telerik.WinControls.GridView

StackTrace:

at Telerik.WinControls.UI.RadGridViewDragDropService.GetDragImageHint(ContentAlignment textAlignment, Bitmap hintImage, RectangleF textRectangle, Int32 hintImageWidth)

at Telerik.WinControls.UI.GridHeaderCellElement.GetDragHintCore()

at Telerik.WinControls.RadItem.Telerik.WinControls.ISupportDrag.GetDragHint()

at Telerik.WinControls.RadDragDropService.PrepareContext()

at Telerik.WinControls.RadDragDropService.HandleMouseMove(Point mousePos)

at Telerik.WinControls.UI.RadGridViewDragDropService.HandleMouseMove(Point mousePosition)

at Telerik.WinControls.RadDragDropService.Telerik.WinControls.IMessageListener.PreviewMessage(Message& msg)

at Telerik.WinControls.RadMessageFilter.NotifyGetMessageEvent(Message& msg)

at Telerik.WinControls.RadMessageFilter.GetMessageHookProc(Int32 code, IntPtr wParam, IntPtr lParam)

at System.Windows.Forms.UnsafeNativeMethods.GetMessageW(MSG& msg, HandleRef hWnd, Int32 uMsgFilterMin, Int32 uMsgFilterMax)

at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)

at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)

at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)

at System.Windows.Forms.Application.Run(Form mainForm)

at RadControlsWinFormsApp1.Program.Main() in Program.cs:line 18

at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)

at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)

at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()

at System.Threading.ThreadHelper.ThreadStart_Context(Object state)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Threading.ThreadHelper.ThreadStart()

InnerException:

here is my code:

private void RadRibbonForm1_Load(object sender, EventArgs e)

{

DataTable Data = new DataTable();

Data.Columns.Add("field1");

Data.Columns.Add("field2");

Data.Columns.Add("field3");

Data.Columns.Add("field4");

Data.Columns.Add("field5");

Data.Columns.Add("field6");

Data.Columns.Add("field7");

Data.Columns.Add("field8");

Data.Columns.Add("field9");

radGridView1.DataSource = Data;

}

void fillData()

{

lock (Data)

{

Data.BeginLoadData();

if (adapter.SelectCommand.Connection.State == ConnectionState.Closed)

adapter.SelectCommand.Connection.Open();

SqlDataReader reader = adapter.SelectCommand.ExecuteReader();

try

{

while (reader.Read())

{

var v1 = reader.GetInt64(0);

var v2 = reader.GetInt32(1);

var v3 = reader.GetDouble(2);

var v4 = reader.GetDouble(3);

var v5 = reader.GetString(4);

var v6 = reader.GetString(5);

var v7 = reader.GetFloat(6);

var v8 = reader.GetFloat(7);

var v9 = reader.GetInt32(8);

Data.LoadDataRow(new object[] { v1, v2, v3, v4, v5, v6, v7, v8, v9 }, false);

}

Data.EndLoadData();

reader.Close();

DataRow[] deletedrows = Data.Select(string.Empty, string.Empty, DataViewRowState.Unchanged);

foreach (DataRow item in deletedrows)

item.Delete();

Data.AcceptChanges();

}

catch (Exception)

{

Data.EndLoadData();

reader.Close();

}

private void timer1_Tick(object sender, EventArgs e)

{

fillData();

this.radGridView1.MasterTemplate.Refresh(null);

}

GridView

answered on 12 Jun 2013

7 answers

229 views

ExplorerBar - Change item attributes

I'm using the PageView in ExplorerBar ViewMode. I would like to change all of my PageViewPages so that:

1. The item height is smaller (shorter).

2. Mouseover doesn't change the item color.

3. Select/Deselect doesn't change the item color.

4. I'm going to set up two images to use to indicate whether the user can expand or collapse a page. I think I can manage that much. But if you have any suggestions, especially for pushing the image over to the right side, I would be happy to read them.

Thank you.

PageView

answered on 12 Jun 2013

1 answer

89 views

Disable Drag and Drop Tile between Groups on Panaroma

Hi,

I'd like know if is possible disable Drag and Drop of Tile? I don't wanna enable Drag and Drop between groups.
If is possible, how to do it?

Thanks,

Flávio Da Maia Jr

General Discussions

answered on 12 Jun 2013

4 answers

303 views

[Solved] Series draw order

Hello,

Is there a way to control the order of series when they draw?

For example, we have at least two subsets of series that I would like to discern between. One should overlay the other for easier perception what is going on in the scatter line curves.

Currently things paint and it's somewhat of a muddy mess to discern much of anything, especially for series of any magnitude, say a dozen tree nodes selected with 9x-series per node, some background, some foreground.

Thank you!

Regards,

Michael Powell

ChartView

answered on 12 Jun 2013

1 answer

220 views

Custom RadTreeNode

I have custom TreeNodes that inherit from RadTreeNode. When I try to select a node via code the custom treenode will not highlight. I've tried all the examples I could find. I saw the post about overriding the ThemeClassName for a treeview, but there is no such property for the radtreenode. help please

Treeview

answered on 12 Jun 2013

4 answers

1.0K+ views

Setting Row Height

Private

Sub RadGridView_SessionData_RowFormatting(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.RowFormattingEventArgs) Handles RadGridView_SessionData.RowFormatting

e.RowElement.RowInfo.Height = 200

End

Sub

This is not working i want to just set the row height for the grid! what am i doing wrong?

GridView

answered on 12 Jun 2013