Hi!

I have a RadGridView (v2022.1.222.40) with a high amount of elements (~90000) and when trying to copy a column I see that the Copying is taking too long. Even if I do a dummy code processing the data.

I cancel all the formats except DataFormats.Text, and it still takes too much time.

I have thought about canceling all the formats and saving the data in a variable instead of the clipboard but if I cancel everything, the Pasting event won't be triggered later... Any suggestion?

Here is my code:

private void gridView_Copying(object sender, GridViewClipboardEventArgs e)
{
    if (e.Format != DataFormats.Text)
    {
        e.Cancel = true;
        return;
    }

    // Do some dummy code

    // Save it in the Clipboard
    e.DataObject.SetData(nameof(MyCustomModel), items);
}

I'm opening a Word (docX) document in the rich text editor, and it seems to open with none of the Styles from the original document in it.

So the document formatting looks strange: the default  font seems be called '"NSimSum", and heading are in 'Sitka Banner'.

This MAY be linked to a strage thing in the document.StyleDictionary. It doesn't like iterating through the StyleDefintions:

For example

for each Styles.StyleDefintion in document.StylesRepository

...does not work

dim firstStyle as Styles.StyleDefintion in document.StylesRepository.first

...is ok

so I am using:

            dim styleDef As Styles.StyleDefinition = document.StyleRepository.ElementAt(i)

...which is OK, but strange

Are these two things connected? Am I missing something ?

Thanks

I have a callout that opens a control.  I would like the control to stay open even if the user clicks elsewhere -- to close it he'll click on the same button used for opening it.

To prevent the control from closing when the user clicks elsewhere I have set AutoClose to false, but now the control stays open even if I switch to another window, or even another program!  The disembodied control still remains in the foreground.

using System.Windows.Forms;

namespace testGridViewKeyPress
{
    public partial class RadForm2 : Telerik.WinControls.UI.RadForm
    {
        private int count_;
        public RadForm2()
        {
            InitializeComponent();

            count_ = 0;
        }

        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            count_++;
            radLabel1.Text = count_.ToString();

            radGridView2.BeginUpdate();
            radGridView2.Rows.Clear();
            //I Want to Process Row Clear And Add
            radGridView2.EndUpdate();

            return true;
        }
    }
}

When I hold down the key, I want to clear the row of the GridView and add a new row.

However, when the number of columns increases, even if rows work is performed between BeingUpdate() and EndUpdate(),

All UI is not highlighted or updated.

If the control needs processing when in the press state like this, shouldn't I use gridview?

Or, if there is another solution, please let me know.

+What I want is for all UI to update and operate when a key is pressed.

+My telerik version 2021.3.914.40(Dev)

Is there a way to give each ContextMenu Item its own backcolor?

I like to display data like above . Each row's data type could be decimal, integer, or string. Thanks!

How can I tell if a CHECKBOX contains focus.  We have a specific set of keyboard requirements that if the user clicks the "ENTER" key, the next control should bet set focused, but not change the state of the checkbox.  Clicking the "ENTER" key does change the state.   When you are on a CheckBox, ContainsFocus doesn't seem to work.   So, what we would like to do, is if the CHECKBOX has focus, when the use clicks the "ENTER" key, it just moves to the next control in a tab order and not check the checkbox.  (We are trying to get the DateTimePicker to do the same thing)...

protected virtual void HandleKeyDownForForm(object sender, KeyEventArgs e)
{
   if (e.KeyData == Keys.Enter)
   {
      if (ntsRadDateTimePickerDob.ContainsFocus)
      {
         _dobHasNullValue = !ntsRadDateTimePickerDob.NullableValue.HasValue;
      }

      if (radCheckBoxActiveAbsentee.ContainsFocus)
      {
         _activeAbsenteeValue = radCheckBoxActiveAbsentee.IsChecked;
      }

      Control ctl = (Control)sender;
      ctl.SelectNextControl(ActiveControl, true, true, true, true);
   }
}

Any help would be greatly appreciated.

Thank You.

I would have thought that after selecting some rows in a RadListControl and hitting Ctrl-C it would copy the text from those rows, but no - it doesn't copy anything.  I also would have thought that there'd be a standard context menu if I were to right-click on it, but not that either.

Am I missing something, or is this the standard behavior of this control?  If it is, do you have some other listbox control that behaves the way I would expect?

Hello,

I've created a custom cell in a radgridview so that I can in one column either display a RadDropDownListElement or a RadTextBoxControlElement depending on if the tag of the row has a datatable or not. If it has a datatable it will show the dropdown, otherwise it shows the textbox.

This I've done pretty much according to this tutorial.

https://docs.telerik.com/devtools/winforms/controls/gridview/cells/creating-custom-cells#custom-group-cell-example

However, my problem is that the selected index changed event on the dropdown is triggered too early, i.e. before all data has been loaded. Is there a way to get around this? I would like that the selected index changed event only kicked in if all the data of the form has been loaded. This I usually achieve by checking if a flag, e.g. 'IsInitiated', is true in the  beginning of the Sub. But cannot seem to reach such a flag from the custom cell class.