Hello,

I created a custom column and cell in my grid following the progress-bar example

https://docs.telerik.com/devtools/winforms/controls/gridview/cells/creating-custom-cells

But I have modified it so that I can view either a textBoxElement or a dropDownListElement depending on what data is in the cell. It all seems to work just fine until I scroll the grid. Scrolling visualy shuffles the data in the custom column. I've tried to take the cell-formatting route but without success. Is it possible to achieve this result somehow?

 Public Class GridParameterValueElement
        Inherits GridDataCellElement

        Public Sub New(ByVal column As GridViewColumn, ByVal row As GridRowElement)
            MyBase.New(column, row)
        End Sub

        Private isInitialized As Boolean
        Private firstTimeIndexChanged As Boolean = True
        Private dropDown As RadDropDownListElement
        Private textBox As RadTextBoxElement
        Protected Overrides Sub CreateChildElements()
            MyBase.CreateChildElements()
            dropDown = New RadDropDownListElement() With { 
                .DropDownStyle = Telerik.WinControls.RadDropDownStyle.DropDownList
            }
            textBox = New RadTextBoxElement() With {
                .Enabled = True,
                .ClickMode = Telerik.WinControls.ClickMode.Press,
                .ZIndex = -1
            }
            If Me.Children.Contains(dropDown) Then Me.Children.Remove(dropDown)
            If Me.Children.Contains(textBox) Then Me.Children.Remove(textBox)
            Me.Children.Add(dropDown)
            Me.Children.Add(textBox)
            AddHandler dropDown.SelectedIndexChanged, AddressOf SelectedIndexChanged
            AddHandler textBox.TextChanged, AddressOf TextInBoxChanged
            'AddHandler textBox.Click, AddressOf TextBox_Click

        End Sub

        Protected Overrides Sub DisposeManagedResources()
            RemoveHandler dropDown.SelectedIndexChanged, AddressOf SelectedIndexChanged
            RemoveHandler textBox.TextChanged, AddressOf TextInBoxChanged
            MyBase.DisposeManagedResources()
        End Sub
            
        'Private Sub TextBox_Click(sender As Object, e As EventArgs)
        '    Dim test  = sender
        'End Sub


        Public Overrides Sub SetContent()
            MyBase.SetContent()

            If Me.RowInfo.Cells("DisplayValue").Tag IsNot Nothing Then

                If Not Me.isInitialized Then 
                    If Me.Children.Contains(textBox) Then Me.Children.Remove(textBox)

                    With Me.dropDown
                        .DataSource = Me.RowInfo.Cells("DisplayValue").Tag
                        .ValueMember = ("DevelopmentTypeParameterValueId")
                        .DisplayMember = ("ParameterValue")
                    End With 
                End If

                If Me.RowInfo.Tag IsNot Nothing Then
                    RemoveHandler dropDown.SelectedIndexChanged, AddressOf SelectedIndexChanged
                    dropDown.SelectedIndex = DirectCast(Me.RowInfo.Tag, Integer)
                    AddHandler dropDown.SelectedIndexChanged, AddressOf SelectedIndexChanged
                Else
                    RemoveHandler dropDown.SelectedIndexChanged, AddressOf SelectedIndexChanged
                    dropDown.SelectedIndex = -1
                    AddHandler dropDown.SelectedIndexChanged, AddressOf SelectedIndexChanged
                End If

            ElseIf Me.Value IsNot Nothing AndAlso Me.Value IsNot DBNull.Value Then

                If Not Me.isInitialized Then 
                    If Me.Children.Contains(dropDown) Then Me.Children.Remove(dropDown)
                    Me.textBox.Text = CStr(Me.Value)
                End If
       
            End If

            Me.isInitialized = True
        
        End Sub


        Protected Overrides ReadOnly Property ThemeEffectiveType() As Type
            Get
                Return GetType(GridDataCellElement)
            End Get
        End Property

        Public Overrides Function IsCompatible(ByVal data As GridViewColumn, ByVal context As Object) As Boolean
            Return TypeOf data Is GridViewParameterValueColumn AndAlso TypeOf context Is GridDataRowElement
        End Function

    End Class
    
    Public Class GridViewParameterValueColumn
        Inherits GridViewDataColumn
        Public Sub New(ByVal fieldName As String)
            MyBase.New(fieldName)
        End Sub
        Public Overrides Function GetCellType(ByVal row As GridViewRowInfo) As Type
            If TypeOf row Is GridViewDataRowInfo Then
                Return GetType(GridParameterValueElement)
            End If
            Return MyBase.GetCellType(row)
        End Function
    End Class

Hi everyone,

is possible with the Zip Library of Telerik UI for WinForms to get the status of compression progress?

What I want is to fill a radprogressbar, so the user can see how much work was already done.

Tank you.

Alessandro

Hi,

I would like to have a grid with no cell selected by default. So every time it is loaded no CurrentCell is selected. Same when there is no selection and the grid is sorted by a column.

Right now, the grid marks the first cell as CurrentCell when it is loaded. I could solve it using the .ClearSelection() method but then I have the same problem when sorting: the first cell is marked as selected.

How can avoid this behavior and only set the CurrentCell when the user marks it?

Hi,

It seems after upgrading to the latest Nuget version of UI.for.WinForms.AllControls.Net70" (Version="2023.3.1114") I ran into the following issue when opening the designer :

System.IO.FileNotFoundException: Could not load file or assembly 'System.Runtime.Serialization.Schema, Version=0.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. Le fichier spécifié est introuvable.
                        File name: 'System.Runtime.Serialization.Schema, Version=0.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
                           at System.Reflection.RuntimeAssembly.InternalLoad(AssemblyName assemblyName, StackCrawlMark& stackMark, AssemblyLoadContext assemblyLoadContext, RuntimeAssembly requestingAssembly, Boolean throwOnFileNotFound)
                           at System.Reflection.Assembly.Load(AssemblyName assemblyRef)
                           at Microsoft.DotNet.DesignTools.Server.DesignToolsServer.LoadReferencedAssemblies(AssemblyName[] referencedAssemblyNames, HashSet`1 serverDependenciesNames, CancellationToken cancellationToken)

After the designer shows up, every custom user control I'm using on it (based on Telerik controls) completely disappear.

If I make a single change and save the file, I can confirm that all of them are gone, looking at the diff with Git.

I'm wondering if it's a Telerik or a Visual Studio issue, but either way, the result is that I can't work anymore on this project.

Hi, I found out that for some languages like Hungarian <html> tag used in radLabel.text white spaces are escaped.

See an example below:

Is there a way to not remove these white spaces?

Br

Pawel

Hi all,

I want to set the initial state of a radCollapsiblePanel to expanded or collapsed. Then, I want to associate an event handler to handle user interaction that can expand or collapse the panel. I perform some operations to set the initial state. When I attach the event handler for the collapsed state, the event is triggered even if the user has not interacted with the panel.

I don't understand why.

Suggestions

Regards

Alessandro

My form have some RadCommandBar, when I click on OverflowButton then a dropdownMenu to show with default two item:

1. Add or Remove Buttons

2. Customize...

And then,  my mouse click on another control on my form, but I see that  RadCommandBar's DropdownMenu do not close.

I also try to some again, but do not anything change.

You can see my image I attached below. I use Telerik version: R3 2022 window form from Nuget package for Application .Net Core

Thank you so much.

Good evening, community,

After trying on my own and not being able to find a solution, I am in need of help.

Problem:

I have a radGridView control in a form called radGridView1. I have added columns to it, but I want the focus() and cursor to blink in the first cell of the first column when the form loads. This would allow me to start typing directly in the cell. I have tried everything I can think of, but I have not been able to achieve this.

What I have tried:

The closest I have come is with the following code:

I have commented out all of the code to show you what I have been doing, but I have not been able to get it to work. Please help me find a solution to my problem.

Thank you,

Community

I have a grid that has 2 image columns - one for an edit icon and one for Delete.  I need separate icons to so they show properly when the row is highlighted and when it is not. I'm adding the icons as shown below. Each row will get these icons. However, if the value in the Relation column is set to Maker then there should be no Delete icon and the Delete event should not fire.

When I set e.Row.Cells["Delete"].Value = null;, nothing happens. The Delete icon remains. What am I missing here?

    if (e.CellElement is GridDataCellElement)
    {
        if (e.Column.Name == "Propertys") // Edit
            e.CellElement.Image = e.Row.IsSelected ? Properties.Resources.EditPenWhite16 : Properties.Resources.EditPen16;

        if (e.Column.Name == "Delete") // Delete
            e.CellElement.Image = e.Row.IsSelected ? Properties.Resources.TrashcanWhite16 : Properties.Resources.Trashcan16;

        if (e.Column.Name == "Relation")
        {
            if (e.CellElement.Value != "Maker")
                e.Row.Cells["Delete"].Value = null;
        }

    }
}

Thanks

Carl

I have a vb.net code in which I am programmatically processing a telerik radspreadsheet control.

I can do many formatting but I am unable to insert a page break.

What property or methods do I use to insert a page break

Thanks

Boniface