PerformClick method of RadButtonElement is sending next error:

System.InvalidCastException: 'Unable to cast object of type 'System.EventArgs' to type 'System.Windows.Forms.MouseEventArgs'.

Find my code below:

private void btnAddField_Click(object sender, EventArgs e)
{
    RadDiagramShape sourceShape = new RadDiagramShape()
    {
        Text = "source",
        Shape = new RoundRectShape(5),
        BackColor = Color.Red
    };

    sourceShape.Position = new Telerik.Windows.Diagrams.Core.Point(150, 100);
    radDiagram.AddShape(sourceShape);

    sourceShape.IsSelected = true;
    RadButtonElement additionalContent = Telerik.WinControls.UI.Diagrams.Primitives.ItemInformationAdorner.GetAdditionalContent(
                                            this.radDiagram.DiagramElement.ItemInformationAdorner) as RadButtonElement;

    additionalContent.PerformClick();
}

What I want is to display the SettingsPane automatically when adding a RadDiagramShape item in a RadDiagram

Regards

Hi- When I add a Rad context menu to a RadToolbarForm, the toolbar vanishes from the designer after a build.  This is new behavior because I have other context menus that I had previously added to the form.  If I drag a RadContextMenu from the toolkit, or I copy/paste an existing context menu, the toolbar disappears after a build.  I am running the latest release (2024.1.130) and toolkit config (although this also happens when running the previous Telerik release)

I tried closing the designer before the build and the toolbar still disappears.  Doing a Clean before build has no effect.  This form is inherited from a simple RadToolbar form (no controls except the toolbar).  The toolbar is still listed in the list of controls for the form

Ha!  Just found out what's happening.  It's deleting the toolbar configuration code from the designer code.  Everything below is gone.  If I add it back in, then do anything with the new context menu, like rename it, it gets removed again

Here's my dev environment:

I can't provide a project or even code snippets that would make sense out of context because the code base is too complex for an easy replication to be setup.

We are trying various things like calling Refresh, Update.

Hoping this is something you've encountered before and have some suggestions.

C#. net core 6, winforms application, TekerikNuGet3 package source, UI.for.WinForms.AllControls.NetCore package 2022.2.622

I am trying to export selected cells from a RadGridView as a csv file.

When using "var exporter = new ExportToCSV(Dgv)" then "exporter.RunExport(fileName);" writes the csv file correctly. It exports every cell.

It doesn't support exporting selections so I wrote a function to do this . The one below is what I used in my project to test what I was doing. It initially writes the csv to a worksheet and wrote that using formatprovider to file, then I just created a stringbuilder adding quotes and appended that to the file afterwards.

Writing the worksheet, the csv values haven't been quoted, plus number fields have had leading zeros removed which proves to be a problem when telephone numbers are stored in a field.

So I googled and found the Settings property which is there to set csv options. But they are private, not public therefore I can't set up the csv propertly.

private void radButton1_Click(object sender, EventArgs e)
  {

    var workbook = new Workbook();
    var worksheet = workbook.Worksheets.Add();

    var rowIndex = 0;
    var columnIndex = -1;
    var sb = new StringBuilder();
    var prevColumnIndex = -1;

    // ForEach cell are accessed vertically then horizontally.
    foreach (var cell in Dgv.SelectedCells)
    {
      // Cell is included in selection even if it's invisible
      // so check visibility and ignore if it isnt
      if (!cell.ColumnInfo.IsVisible) continue;

      // At bottom of column, rownum will change. Watch for this
      // and reset x and y values
      var rowNum = cell.RowInfo.Index;
      if (rowNum != prevColumnIndex)
      {
        prevColumnIndex = rowNum;
        rowIndex = 0;
        columnIndex++;
        sb.AppendLine("");
      }
      else if (!string.IsNullOrEmpty(sb.ToString()))
        sb.Append(",");

      var value = cell.Value;
      worksheet.Cells[columnIndex, rowIndex++ ].SetValue(value.ToString());
      sb.Append($"\"{value.ToString()}\"");
    }

    var fileName = @"C:\temp\SampleFile.csv";

    IWorkbookFormatProvider formatProvider = new CsvFormatProvider();
    using var output = new FileStream(fileName, FileMode.Create);
    formatProvider.Export(workbook, output);
    output.Close();

    // Write contents of sb to the file for comparison sake
    File.AppendAllText(fileName, sb.ToString());

  }

I just upgraded to the latest version of Telerik products and facing the issues described below.

When dragging and drop Telerik UI objects from the toolbar on a form, the dialog box below is displayed with question but there is no button to click to answer the question and I don't where to stop it.

See screenshot attached.

Hello 

I am have a problem with pdf wiewer when the PDF file contains an images , it is slow in movement and it is difficult to navigate between pages. Is it possible to fix this problem 

Hi All,

Note:- I am using Bound RadTreeview. Bound with DataSource.

1 Take RadTreeview

2 Add Few nodes Like:

    ......Node A

    ......Node B

    ......Node C

    ............Node D

    ............Node E

3 Now Drag Node B and Drop it in Node C (As Node C's Child)

4 It throw Exception Error Msg  "Collection was modified; enumeration operation may not execute."

5  Now Try to Drag Node E and Drop it in Node B, again same error occurs

6 Full error screen i attached here.

Please reply as soon as possible.

Hello Guys,

Good Evening , As per your suggestions i make my custom treeview node with LiteVisualElements .

In That Node i have taken one StackLayoutElement and RoundRectShape assigned to it but still panel shows corners instead of round edges,

i tried with different properties and styles but not get succeed , so please help me out.

here i have attached image of my node and "stackLayoutElement" code too.

Zooming in will throw an Exception that crashes the program.

The ZoomLevel needed to cause the exception is dependent on the area of the RadMap selected.

Provider: BingRestMapProvider

ImagerySet AerialWithLabelsOnDemand

Zooming in over Antarctica, Exception thrown zooming in at MapElement.ZoomLevel 14.

Zooming in over Australia, Exception thrown zooming in at MapElement.ZoomLevel 21.

Hi there,

We have recently found a bug on both the RadDocument and Rad Rich Text Editor. Created a RTF document via the RadRichText Editor. The RTF document contains a table. When the document is saved and loaded from the same form, it is displaying correctly, however when loaded from a different form, it seems to have shrunk and lost the column width, thus having long and skinny columns.

We have set the fixed column width on the table, however this did not seem to solve the issue.

I have attached two screenshots for reference. One with the correct looking table, and one with the long and skinny columns.

Is there a workaround, or is this a known bug?

Correct table:

Long and skinny columns:

Currently on Telerik Winforms version 2018.3.1016.40

Kind regards,

Paul

I have a form which contains TreeView control. I need to convert it to RadTreeView. So I replaced TreeView control with RadTreeView and TreeNode with RadTreeNode in the code. I found that the events in both are different, so tried to replace the events with similar events in RadTree.

Following are the events that I have replaced in my code :

1.  

        Private Sub TreeView1_AfterExpand(ByVal sender As Object, ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles tvMain.AfterExpand

Replaced by -

        Private Sub TreeView1_AfterExpand(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.RadTreeViewEventArgs) Handles tvMain.NodeExpandedChanged   

2.

            Private Sub TreeView1_AfterCollapse(ByVal sender As Object, ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles tvMain.AfterCollapse

  Replaced by -  

            Private Sub TreeView1_AfterCollapse(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.RadTreeViewEventArgs) Handles tvMain.NodeExpandedChanged

and included Expanded flag to check if it is expand or collapse.

Here, I noticed unwanted firing of this replaced event when compared to the old event, but I handled it using the Expanded flag.

3.

        Private Sub tvMain_AfterSelect(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles tvMain.AfterSelect

Replaced by -

        Private Sub tvMain_AfterSelect(ByVal sender As System.Object, ByVal e As Telerik.WinControls.UI.RadTreeViewEventArgs) Handles tvMain.SelectedNodesChanged

This event gets fired twice while clicking on a node.

My main issues are,

• During the initial load of the form, the tree gets populated and at that time the select event (mentioned in point 3) fires automatically in my old project in which TreeView is used. But in the new project, during the load of the form the replaced event is not fired.
• Similarly, when I clicks a node , the replaced select event fires twice. After that I have a button in the same form which works like, when we click on a node and then click on the add button it will add a new node to the tree under the selected node. Now the functionality of the button doesnt work because, within the click function of add button, treeView1.selectedNode is 'Nothing'. Eventhough the select event is fired on clicking the node, the selectednode is 'Nothing' inside the click function of add button.

i am getting a null reference exception with the following call stack:

Description: The process was terminated due to an unhandled exception.

Exception Info: System.NullReferenceException

   at Telerik.WinControls.UI.TableViewRowLayoutBase.GetRowHeight(Telerik.WinControls.UI.GridViewRowInfo)

   at Telerik.WinControls.UI.RowElementProvider.GetElementSize(Telerik.WinControls.UI.GridViewRowInfo)

   at Telerik.WinControls.UI.ItemScroller`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].GetScrollHeight(System.__Canon)

   at Telerik.WinControls.UI.ItemScroller`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].ScrollDown(Int32)

   at Telerik.WinControls.UI.ItemScroller`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].ScrollTo(Int32)

   at Telerik.WinControls.UI.ItemScroller`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].scrollbar_ValueChanged(System.Object, System.EventArgs)

   at Telerik.WinControls.UI.RadScrollBarElement.OnValueChanged(Int32, Int32)

   at Telerik.WinControls.UI.RadScrollBarElement.set_Value(Int32)

   at Telerik.WinControls.UI.ItemScroller`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].UpdateScrollValue()

   at Telerik.WinControls.UI.ItemScroller`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].UpdateScrollRange()

   at Telerik.WinControls.UI.RowScroller.UpdateScrollRange()

   at Telerik.WinControls.UI.GridTableElement.UpdateNoDataText()

   at Telerik.WinControls.UI.GridTableElement.UpdateAll()

   at Telerik.WinControls.UI.GridTableElement.UpdateViewCore(System.Object, Telerik.WinControls.UI.DataViewChangedEventArgs)

   at Telerik.WinControls.UI.GridTableElement.UpdateView(System.Object, Telerik.WinControls.UI.DataViewChangedEventArgs)

   at Telerik.WinControls.UI.GridTableElement.ProcessTemplateEvent(Telerik.WinControls.UI.GridViewEvent)

   at Telerik.WinControls.UI.GridTableElement.Telerik.WinControls.UI.IGridViewEventListener.ProcessEvent(Telerik.WinControls.UI.GridViewEvent)

   at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(Telerik.WinControls.UI.GridViewEvent, Telerik.WinControls.UI.PriorityWeakReferenceList, Telerik.WinControls.UI.GridEventProcessMode)

   at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessEvent(Telerik.WinControls.UI.GridViewEvent)

   at Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(Telerik.WinControls.UI.GridViewEvent)

   at Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()

   at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(Telerik.WinControls.UI.GridViewEvent)

   at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(Telerik.WinControls.UI.GridViewTemplate, Telerik.WinControls.UI.GridViewEvent, Boolean)

   at Telerik.WinControls.UI.GridViewTemplate.DispatchEvent(Telerik.WinControls.UI.GridViewEvent, Boolean)

   at Telerik.WinControls.UI.GridViewTemplate.DispatchDataViewChangedEvent(System.Object, Telerik.WinControls.UI.DataViewChangedEventArgs)

   at Telerik.WinControls.UI.GridViewTemplate.OnViewChanged(System.Object, Telerik.WinControls.UI.DataViewChangedEventArgs)

   at Telerik.WinControls.UI.MasterGridViewTemplate.OnViewChanged(System.Object, Telerik.WinControls.UI.DataViewChangedEventArgs)

   at Telerik.WinControls.UI.GridViewTemplate.EndUpdate(Boolean, Telerik.WinControls.UI.DataViewChangedEventArgs)

   at Telerik.WinControls.UI.MasterGridViewTemplate.EndUpdate(Boolean, Telerik.WinControls.UI.DataViewChangedEventArgs)

   at Telerik.WinControls.UI.GridViewTemplate.set_RowCount(Int32)

   at Telerik.WinControls.UI.RadGridView.set_RowCount(Int32)

   at Communication_Logger.frmCommunicationLogger.RadRibbonForm1_OnDataReceived(Communication_Logger.Data)

   at Communication_Logger.ChannelClass.Serial_DataReceived(System.Object, System.IO.Ports.SerialDataReceivedEventArgs)

   at System.IO.Ports.SerialPort.CatchReceivedEvents(System.Object, System.IO.Ports.SerialDataReceivedEventArgs)

   at System.IO.Ports.SerialStream+EventLoopRunner.CallReceiveEvents(System.Object)

   at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(System.Object)

   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)

   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)

   at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()

   at System.Threading.ThreadPoolWorkQueue.Dispatch()

   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()

the setup is a dotNet 4.5.2 winforms application with RadGridView in virtual mode.

The exception occur when the application is left working for days (2 in this case) without any user interaction.

The application normally updates a list that is used by the gridview, the list records are added and removed continuously, the grid view RowCount is updated via a timer.

i suspect that the RowCount reported at one point in time doesn't match the list size as it is trimmed, and therfore the GetRowHeight fails as the data doesn't exist - can this be handled in the gridview - to avoid a termination of the process due to the exception ?

regards,

guy.

Hi All,

I have made User control for custom node, in this user control i have used following controls

1 RadLabel (no of control - 3)

2 RadPanel (no of control -1)

3 PictureBox (no of Control - 4 )

4 TableLayoutPanel (no of control -3)

Means i have used total 11 controls within my user control.

Height of usercontrol = 146

Width of Usercontrol = 595

I have taken RadTreeView and above UserControl added as Node,following properties of treeview is set

this.radTreeView1.DataSource = Staff.GetStaff();
            this.radTreeView1.ParentMember = "ParentID";
            this.radTreeView1.ChildMember = "ID";
            this.radTreeView1.DisplayMember = "Department";
            this.radTreeView1.CreateNodeElement += this.OnCreateNodeElement;

this.radTreeView1.TreeViewElement.AutoSizeItems = true;
            this.radTreeView1.ShowRootLines = false;
            this.radTreeView1.FullRowSelect = false;
            this.radTreeView1.ShowLines = true;
            this.radTreeView1.LineStyle = TreeLineStyle.Solid;
            this.radTreeView1.LineColor = Color.FromArgb(110, 153, 210);
            this.radTreeView1.TreeIndent = 50;

this.radTreeView1.ExpandAll();

But when i run the code it shows like this means my control is not displaying and the property "AutoSizeItems" is not working.

hope for quick reply

Dear Ladies and Gentlemen

Currently I am trying in vain to upgrade to the latest version Telerik UI for WinForms 2022.1.118.
However, the update fails with the error given below.

I have already uninstalled and reinstalled VS2019. Unfortunately this did not help.

Can you help?

Best Timo

Hi there.

Selecting a time from the TimePicker sets the time.  However, if the bound parameter is null, the Date part of the DateTime values are still invalid and will throw errors when saving data to databases.

The TimePicker should at least by default insert a default valid Date even if it is 01/01/1900 or DateTime.Today.

Regards Kieran.

1. Select the ColorBox's ellipses to open the Color Dialog

2. Select the Web tab

3. Select Any colour in this Page

4. Select Transparent

Colour will update

5. Select the Professional tab

6. Select any colour

Colour won't update

7. Select any colour

Colour won't update

8. Select OK on Dialog

Colour will be transparent

Values will be same as selected in step 7

Hi Dinko and Team,

As I mentioned in the previous forum, We need fix for Raddropdownlist.SelectedIndex.

When we set SelectedIndex=5 or some value in selectedIndexchangedEvent then the recursive call is happening for SelectedIndex. So we need to restrict the recursive call for both Raddropdownlist.DataSource as well as Raddropdownlist.SelectedIdex.

  private void radDropDownList1_SelectedIndexChanged(object sender, Telerik.WinControls.UI.Data.PositionChangedEventArgs e)
        {
           fillIndustryProcess1(); // radDropDownList1.DataSource = dt; when we set Datasource the recursive call is occurring
            radDropDownList1.SelectedIdex = 5; // radDropDownList1.SelectedIdex= 5; when we set Datasource the recursive call is occurring

}

Old Forums in which , Telerik team fixed the RadDropDownList .SelectedValue.

Telerick version 2023.1.314 RadDropDownList controls throwing StackoverflowException when migrating visual studio 2010 to 2022 in UI for WinForms | Telerik Forums 

Previous forums in which , Telerik team yet to fix for RadDropDownList.Datasource.

Telerick version 2024.1.130.48, RadDropDownList controls throwing StackoverflowException when migrating visual studio 2010 to 2022 in UI for WinForms | Telerik Forums

Thanks,

Maheswari

Hello support,

here is what happend:

I created a RadFrom with controlls on it.

Then i add it to my RadDock like this:

private void Add_RadForm_asDocument_ToRadDock(RadDock rd, HostWindow hw, object radform, string title)
{
    bool found = false;

    foreach (var item in radDock_main_notr.DockWindows)
    {
        if (item.GetType() == typeof(HostWindow))
        {
            if (((HostWindow)item).Name == radform.GetType().Name + "1")
            {
                found = true;
                hw = (HostWindow)item;
            }
        }
    }

    if (found == false && radform != null)
    {
        if (hw == null || hw.Text == "")
        {
            hw = rd.DockControl((System.Windows.Forms.Control)radform, DockPosition.Fill, DockType.Document);
        }
    }

    hw.Text = title;
    hw.CloseAction = DockWindowCloseAction.Close;
    hw.ToolCaptionButtons = ToolStripCaptionButtons.None;
    hw.Select();
}

The RadFrom is added to the RadDock:

Settings is the new RadFrom thats now docked.
But when i try to use the RadDropDownList then its "stucks" (also the other GUI controls):

The  changed selection of the RadDropDownList will not change.
When i close the RadForm via the "x" and eropen it again it works.