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5 answers
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I have a BindingList of a business object that I want to bind with a ListView (in detail mode).

I can change which properties get displayed (and there respective column headers) using the ColumnCreating event, but I cannot change the order of the columns.

As I understand, the binding process of ListView will use the properties in the order that they appear in code, this should have been fine, except that in case of object inheritance, the parent's class properties come after the child's class properties. In my case, I want base class properties to appear first and followed by child class properties.

Is there a way to change or affect the order that columns get created?

This would also allow me to save and recreate the order in which the columns appear, if, in future, I allow the user to reorder the columns of the ListView.

I know that I could use a DataTable to manipulate the columns beforehand, and use this as my binding source, but I would like to avoid this "conversion" between business object and DataTable.

Mark
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 answered on 18 Oct 2017
3 answers
116 views

Hello all,

I'm looking for an option that allow to get the date of the current week with an input by the start of the nameday.

example : 

we are the 16 oct

I write on the keyboard 'f'

I wish an autocompletion with 'friday 20 october'

this is possible ?

with Tuesday and Thursday 2 keypress are required.(tu or th)

Thanks.

Hristo
Telerik team
 answered on 18 Oct 2017
1 answer
187 views

Good day,

the viewer (2017 R3) crash if you try to copy the selected text.

1. select text in viewer

2. open the context menu 

3. click on 'Copy'

You have the exception:

System.NullReferenceException occurred
  HResult=0x80004003
  Message=Riferimento a un oggetto non impostato su un'istanza di oggetto.
  Source=Telerik.Windows.Documents.Fixed
  StackTrace:
   at Telerik.Windows.Documents.Fixed.FormatProviders.Old.Pdf.Utils.Helper.get_Dispatcher()
   at Telerik.Windows.Documents.Fixed.Selection.TextSelection.GetSelectedText(Object param)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart(Object obj)

Thank you.

Dess | Tech Support Engineer, Principal
Telerik team
 answered on 17 Oct 2017
2 answers
231 views

Hello,

I've added a custom shape with an image to the toolbox and can put them into the diagram. With this thread: http://www.telerik.com/forums/create-custom-items I could implement it.

Now I would like to open the settingspane, resize und rotate the shape, but it does not work... this is my code:

private void radDiagramToolbox1_VisualItemFormatting(object sender, ListViewVisualItemEventArgs e)
{
    DiagramListViewDataItem dataItem = e.VisualItem.Data as DiagramListViewDataItem;
    if (dataItem != null)
    {
        DiagramListViewVisualItem el = e.VisualItem as DiagramListViewVisualItem;
 
        if (dataItem.Key.Equals("MyShape"))
        {
            // on toolbox
            el.Image = new System.Drawing.Bitmap(@"blabla.png");
            el.ImageLayout = ImageLayout.Zoom;
            el.ShapeElement.Opacity = 0;
            el.Text = "";
            el.TextElement.Text = "";
 
            // on diagram
            el.ShapeElement.BackColor = System.Drawing.Color.Transparent;
            el.ShapeElement.Image = new System.Drawing.Bitmap(@"blabla.png");
            el.ShapeElement.ImageLayout = ImageLayout.Stretch;
            el.ShapeElement.Text = "";
            el.ShapeElement.Size = new Size(80, 80);
            el.ShapeElement.BorderThickness = new Padding(0);
        }
    }
}
private void DragDropService_PreviewDragDrop(object sender, RadDropEventArgs e)
{
    DiagramListViewVisualItem dragItem = e.DragInstance as DiagramListViewVisualItem;
    RadDiagramElement dropTarget = e.HitTarget as RadDiagramElement;
    if (dragItem != null && dropTarget != null && dragItem.Data.Key.Equals("MyShape"))
    {
        e.Handled = true;
        RadDiagramShape shape = dropTarget.Shapes.Last() as RadDiagramShape;
        shape.DiagramShapeElement.Shape = null;
        shape.BackColor = System.Drawing.Color.Transparent;
        shape.DiagramShapeElement.Image = dragItem.Image;
        shape.DiagramShapeElement.ImageLayout = dragItem.ImageLayout;
 
    };
}

 

Thank you!

Regards,

Larissa

 

Larissa
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Rank 1
 answered on 17 Oct 2017
3 answers
224 views

Hi,

I have a grid view having search filter button on and need to filter the date column with a custom filter. When I click on the 'Custom' option, the Filter Dialog will get popped up and I can give my search values and click on 'OK', If user gives the date as '31/12/2017' then my application is crashing after it raises a validation error message. I don't know where to catch this exception and act upon. Please help me providing solution for at least one of the below things or any other better way to handle this.

1. Validate the date value as per the format expecting by the application before closing the Filter dialog box.

2. Catch the exception raised by the wrong format/OK button click

3. Restrict the user to not enter the values except in the specified format

 

Thanks in advance.

Chandra

Dess | Tech Support Engineer, Principal
Telerik team
 answered on 16 Oct 2017
4 answers
592 views
Hello,
I need to add the background highlight for grid row(s), please help me to implement it!
Thanks
Paul
Top achievements
Rank 1
 answered on 16 Oct 2017
3 answers
150 views

Hello,

One of RadMenuItem constructors is new RadMenuItem("TEXT", object Tag)..
How do I retrieve that Tag value in code?

Thanks

Роберт
Top achievements
Rank 1
 answered on 14 Oct 2017
5 answers
4.0K+ views
I am new to Telerik Winforms/ASP toolkit.  I have been previously using infragistics.  I am trying to hide a column in a gridview after I send a datatable to the datasource of the grid.  I am trying to find a visible property of the column, but unable to do so.  All the posts I have seen show that you have to loop through the entire grid setting the cell's visible property to false. 

Is there an easy way to do the following or do I really have to loop through the entire grid?

RadGridView1.Columns("id").visible = false 
Dess | Tech Support Engineer, Principal
Telerik team
 answered on 13 Oct 2017
1 answer
296 views
I am using a RadLayoutControl and I would like show a RadStatusStrip with a progressbar at the bottom of the form while loading data into the forms RadGridView. I want the status strip to go away when loading has finished though and I expect the grid to resize properly when addingthe status strip and when removing it. How can I accomplish this?
Dess | Tech Support Engineer, Principal
Telerik team
 answered on 13 Oct 2017
1 answer
389 views

I have a grid that is populated from a BindingList (I am working with the EntityFramework)

The CellValueChanged event does apply the changes to the underlying database

But When I add a new row, the UserAddedRow (which is fired) does not add the row to the underlying database (and does not generate an error)

Despite long hours of research I have not found the solution to add a new row to my table by typing it's value in the "New Row" of the grid

Thanks in advance

The code snipet:

'Populate the Grid
 Dim mArena As New mArena(context)
        Dim allArenas As BindingList(Of Arena) = mArena.GetArenasByShowId(idShow)
        gvArena.AutoGenerateColumns = True
        gvArena.DataSource = allArenas

   Public Function GetArenasByShowId(ByVal idShow As Integer) As BindingList(Of Arena)
        Try
            Dim Query = (From aArena As Arena In context.Arenas
                         Where aArena.idShow = idShow
                         Order By aArena.Name)
            Return New BindingList(Of Arena)(Query.ToList())
        Catch ex As Exception
            RaiseEvent msg("F", ex.Message)
            Return Nothing
        End Try
    End Function

'Grid Events
    Private Sub gvArena_CellValueChanged(sender As Object, e As GridViewCellEventArgs) Handles gvArena.CellValueChanged
        Try
            context.SaveChanges()
        Catch ex As Exception
            RaiseEvent msg("F", "CellValueChanged: " & ex.Message)
        End Try
    End Sub

    Private Sub gvArena_UserAddedRow(sender As Object, e As GridViewRowEventArgs) Handles gvArena.UserAddedRow
        Try
            gvArena.EndEdit()
            context.SaveChanges()
        Catch ex As Exception
            RaiseEvent msg("F", "AddedRow: " & ex.Message)
        End Try
    End Sub

Dimitar
Telerik team
 answered on 13 Oct 2017
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