Questions on UI for WinForms Forum

1 answer

177 views

[Solved] RadDropDownList disable arrow when readonly

Hello,

I am new to WinForms.

Is there a possibility to disable the Arrow for the RadDropDownList ?

When I set the component to readonly, I can still choose a new value via the arrow.

But then the value is never saved because it is read-only.

And wich property do I have to set for this?

DropDownList

answered on 18 Sep 2024

2 answers

124 views

[Solved] RadGridView get new value

I have a question about the RadGridView

I want to retrieve the new value of a cell that I have changed.

When I change a cell from value "AB" to "CD", how can I then get "CD" ?

Should I use the RowsChanged or CellValueChanged event?

In the RowsChanged, you have a property e:NewItems, but I don't know how you then can get value "CD" from e:NewItems.

GanttView

answered on 16 Sep 2024

1 answer

94 views

Winforms CloseReason=WindowsShutDown in MdiChild Form

Hi!

I have MdiParent Form which hosts multiple MdiChids. I would like to determine why the MidParent is being closed withing the MdiChild-ClosingEvent. The CloseReason in the MdiChild-ClosingEvent only says "MdiFormClosing". But I dont know if the MdiParent is closed due to user operation (eg. pressing X in upper right corner) or Windows is being shutdown.

How can I solve that?

background:

The MdiChild_FormClosing-Event either asks if this or all childs shall be closed. If all are confirmed, the static variable of "bool _ForceClosing" prevents the next child from asking again. So good so far. I would like to skip this confirmation stuff in case, windows is being shutdown. But this CloseReason in MdiChild only has UserClosing or MdiFormClosing.

System::Void 
Form_Client::Form_Client_FormClosing(System::Object^  sender, System::Windows::Forms::FormClosingEventArgs^  e)
  {
    //-----------------------------------------------------------------------------------------------------------------------------
    try
    {
      //-- mdi closing already confirmed --------------------------------------------------------------------
      if (this->_ForceClosing == true)
      {
        e->Cancel = false;
        return;
      }
      //-- windows shutdown ---------------------------------------------------------------------------------
      else if (e->CloseReason == System::Windows::Forms::CloseReason::WindowsShutDown)  // not working
      {
        this->_ForceClosing = true;
      }
      //-- user single closing (ask if connected) -----------------------------------------------------------
      else if (e->CloseReason == System::Windows::Forms::CloseReason::UserClosing)
      {
        // ask if this child shall be closed
        if (Result != System::Windows::Forms::DialogResult::OK)
        {
          e->Cancel = true;
          return;
        }
      }
      //-- mdi parent closing initiated ---------------------------------------------------------------------
      else if (e->CloseReason == System::Windows::Forms::CloseReason::MdiFormClosing)
      {
        // ask if all childs shall be closed
        if (Result != System::Windows::Forms::DialogResult::Yes)
        {
          e->Cancel = true;
          return;
        }
        //-------------------------------------------------------------------------------
        this->_ForceClosing = true;
      }
      //-- unknown reason -> just close all -----------------------------------------------------------------
      else
      {
        this->_ForceClosing = true;
      }
    }
    //----------------------------------------------------------------------------------------------------------------------------
    catch (System::Exception^ ex)
    {
      System::Windows::Forms::MessageBox::Show( ex->ToString() ); 
    }
  }

Thanks in advance

Form

answered on 16 Sep 2024

1 answer

141 views

Localizing treeview node elements text

Hello, can you please tell me how to properly localize radtreeview nodes text? The localization is working properly for other controls like rad menu items: In case of them, I only had to change the language property in parent RadForm, and set text property in particular language for that control and it worked fine. However, it cannot be done for tree nodes. For tree nodes I tried changing the language property in the parent form then opening the property builder where I set Text property. It turns out that the text set in this property is the text that is shown in all languages, not just in the one selected in the main form. So, how to do this?

Treeview

answered on 16 Sep 2024

1 answer

127 views

RowsChanged is fired after CellEditorInitialized without any change

How to fix the issue below where a cell is marked with modified just because the cell was clicked?

Before the datasource is set.

After the datasource is set.

The value was not changed, but it is firing he RowsChanged.

How can avoid it to happen?

DropDownList

GridView

answered on 16 Sep 2024

1 answer

131 views

[Solved] Gridview enum wrapper in ComboBoxColumn

Hi Telerik support team,

I’ve a question about the GridView for Winforms. In my grid I’ve a combobox column which is based on a enum. Before, in net framework 4.7.2 I had a nice wrapper around it in order to translate the values. Works like a charm.

Now we’ve updated our application to net8 and that part does not work anymore. I’ve isolated the code in a simple example program. The attached solution contains 2 projects, one is net framework and the other is net8. Code is the same. In the net8 I get an exception when I try to set a filter on the column.

Are you aware of this? Did I miss something? How can I get this working in net8?

Any help is welcome.

Regards,

Daniel Kaya

GridView

answered on 12 Sep 2024

1 answer

81 views

Group by ID but sort by Date RadGridView

as per the title I group records by groupID, but the records also contain dates, I in turn would like to order the groups by "creation date" without creating other subgroups, leaving the grouping by groupID unchanged.

Currently I use this code for grouping:

GroupDescriptor descriptor = new();
descriptor.GroupNames.Add("GroupID", ListSortDirection.Descending);
this.DGNotes.GroupDescriptors.Add(descriptor);

I tried using examples in the documentation but to no avail. Thanks for your help.

GridView

answered on 11 Sep 2024

1 answer

97 views

Dynamic theme change

Bonjour,

je cherche la commande pour changer dynamiquement le thème des écrans.
J'ai une combo-box avec differents thèmes: Fluent, Telerik metro blue,....
Des que l'on sélectionne un thème, je veux que tous les écrans changent de thème.
Ex: Fluent par defaut. L'utilisateur choisit 'telerik metro blue' alors les écrans utilisents ce thème.
Merci de vos retours.

Form

answered on 05 Sep 2024

1 answer

95 views

unable to get listviewitem to form properly

Below is the code i am using for visualitemcreating, however the layout is not coming out proper, can anyone please help me with this.

When i run the code, i am getting the listview as which does not include the role and email details that should com in the second row.

Please help, i am unable to find what i am missing here.

Public Class CustomUserVisualItem
    Inherits SimpleListViewVisualItem
    Private Row1Element As LightVisualElement
    Private Row2RoleElement As LightVisualElement
    Private Row2EMailElement As LightVisualElement
    Private stackLayoutMain As StackLayoutPanel
    Private stackLayoutRow2 As StackLayoutPanel
    Protected Overrides Sub CreateChildElements()
        MyBase.CreateChildElements()
        Me.stackLayoutMain = New StackLayoutPanel()
        Me.stackLayoutMain.Orientation = Orientation.Vertical
        Me.stackLayoutMain.EqualChildrenWidth = True
        Me.stackLayoutMain.ShouldHandleMouseInput = False
        Me.stackLayoutMain.NotifyParentOnMouseInput = True
        Me.Children.Add(Me.stackLayoutMain)

        Me.Row1Element = New LightVisualElement()
        Me.Row1Element.StretchHorizontally = True
        Me.Row1Element.MinSize = New Size(120, 0)
        Me.Row1Element.ShouldHandleMouseInput = False
        Me.Row1Element.NotifyParentOnMouseInput = True
        Me.stackLayoutMain.Children.Add(Me.Row1Element)


        Me.stackLayoutRow2 = New StackLayoutPanel()
        Me.stackLayoutRow2.Orientation = Orientation.Horizontal
        Me.stackLayoutRow2.EqualChildrenWidth = True
        Me.stackLayoutRow2.ShouldHandleMouseInput = False
        Me.stackLayoutRow2.NotifyParentOnMouseInput = True
        Me.stackLayoutMain.Children.Add(Me.stackLayoutRow2)

        Me.Row2EMailElement = New LightVisualElement()
        Me.Row2EMailElement.Text = "Email"
        Me.Row2EMailElement.MinSize = New Size(60, 0)
        Me.Row2EMailElement.TextAlignment = ContentAlignment.MiddleLeft
        Me.Row2EMailElement.NotifyParentOnMouseInput = True
        Me.Row2EMailElement.ShouldHandleMouseInput = False
        Me.stackLayoutRow2.Children.Add(Me.Row2EMailElement)

        Me.Row2RoleElement = New LightVisualElement()
        Me.Row2RoleElement.Text = "Role"
        Me.Row2RoleElement.MinSize = New Size(60, 0)
        Me.Row2RoleElement.TextAlignment = ContentAlignment.MiddleRight
        Me.Row2RoleElement.NotifyParentOnMouseInput = True
        Me.Row2RoleElement.ShouldHandleMouseInput = False
        Me.stackLayoutRow2.Children.Add(Me.Row2RoleElement)


    End Sub
    Protected Overrides Sub SynchronizeProperties()
        MyBase.SynchronizeProperties()

        Dim product As UsersList = TryCast(Me.Data.Tag, UsersList)
        Dim color As String = ""

        If product.userstatus = "Active" Then
            color = "Green"
        Else
            color = "Red"
        End If

        Me.Text = ""
        Me.Row1Element.Text = "<html><span style=""color: " & color & "; font-size: 12pt;"">• </span> <span style=""font-size:12pt;"">" & product.firstName & " " & product.lastName & "</span>"
        Me.Row2RoleElement.Text = "<html><span style=""font-size:9pt;"">" & product.role & "</span>"
        Me.Row2EMailElement.Text = "<html><span style=""font-size:9pt;"">" & product.email & "</span>"
    End Sub
    Protected Overrides ReadOnly Property ThemeEffectiveType() As Type
        Get
            Return GetType(SimpleListViewVisualItem)
        End Get
    End Property
End Class

ListView

answered on 04 Sep 2024

1 answer

170 views

[Solved] PDF Markup/Annotation Settings?

We have incomming PDF documents that have been annotated/marked up/stamped (we beleive using Adobe). When you view or print from Telerik the "annotations" are missing or wrongly formated.

Chrome and Edge both display the PDF correctly.

Are there any properties or techniques I can use to get Telerik PDF to include the annotations ?

Attached are the original PDF "PDFMarkUp.pdf" and the PDF as printed by Telerik "PDFMarkUpOUT.pdf" (Replicates the Telerik View )

PdfViewer and PdfViewerNavigator