Hey guys, I've inherited RadDateTimePicker to do a better handling of null value with databinding and the problem is when it got focused by Tab key it borders don't change as it should be. Ive tried setting focus to DateTimePickerElement when my picker got focus, but it didn't solve as well. 

 public partial class NossoRadDateTimePicker : RadDateTimePicker
    {
        public NossoRadDateTimePicker()
        {
            InitializeComponent();
            TabStop = true;
            this.ValueChanged += NossoRadDateTimePicker_ValueChanged;
            this.GotFocus += NossoRadDateTimePicker_GotFocus;
        }

        private void NossoRadDateTimePicker_GotFocus(object sender, EventArgs e)
        {
            base.DateTimePickerElement.Focus();
        }

        private void NossoRadDateTimePicker_ValueChanged(object sender, EventArgs e)
        {
            if (ShowCheckBox && checking == false)
                this.Checked = true;

        }

        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public new DateTime? NullableValue
        {
            get
            {
                throw new Exception("Use Value");
            }
            set
            {
                throw new Exception("Use Value");
            }
        }

        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        /// <summary>
        /// Poderá retornar null caso use o checkbox e ele não esteja checkado
        /// </summary>
        public new DateTime? Value
        {
            get
            {
                DateTime? valor = base.Value;

                if (ShowCheckBox && Checked == false)
                    valor = null;

                return valor;
            }
            set
            {
                //garantir que essa bosta n sete valor fora do range de datas
                if (value != null)
                {
                    value = value > MaxDate ? MaxDate : value;
                    value = value < MinDate ? MinDate : value;
                    Checked = true;
                }
                else if (ShowCheckBox)
                    Checked = false;

                checking = true;
                base.Value = value ?? DateTime.Now;
                checking = false;

            }
        }

        protected override void OnKeyDown(KeyEventArgs e)
        {
            if (e.KeyData == Keys.Space)
            {
                this.Checked = !this.Checked;
            }
            else
            {
                base.OnKeyDown(e);

            }
        }

        bool checking;
    }

Hello!

I need to deselect only one cell once selected.
I have tried the following code in the SelectionChanged and SelectionChanging events. But it does not work.

Any suggestions?

Thanks.

I am trying to set the color of the bar , when a value goes below a certain amount. I have tried the below, but none of them change the color of the bar from Green to red. :

      barBat.BackColor = Color.Yellow
                        barBat.GaugeElement.BackColor = Color.Yellow
                        barBat.GaugeElement.BackColor2 = Color.Yellow
                        barBat.GaugeElement.BackColor3 = Color.Yellow
                        barBat.GaugeElement.BackColor4 = Color.Yellow

Hi, 

I'm struggling for something that perhaps is very easy...

I have assigned a DataTable as Datasource for my GridView.

The data is correcly shown and the boolean values are mapped on checkboxes.

I save back the values to the database getting the new values from the DataTable.

However sometimes the user open the form, click on checkboxed value, and then click on the Save button.

It seems that if you don't deselect the modified Row, the new value of the checkbox is not stored into the DataTable, so I save the old value, while in the GridView you see the new value.

Is there a way to force the sync right after the click on the checkbox?

I've tried with something like this, but without success.

 Hi there, I've searched internet for info for a long time but I couldn't get much answers, this why I'm asking here.

I have a simple UserControl with 2 radtextbox inside, one with dock left and other with dock fill.

What I wanna do is the same u do with Textbox height. Example: if u change the Textbox Font or ThemeName it's height will be resized.

This is exactly what I want to do, change my UserControl height to be exactly the same TextBox height when I change Font or ThemeName.

I've already tried:  

-> override void SetBoundsCore();

-> inherit ControlDesigner to override SelectionRules.

-> overriding Size property do half work, because the UC keeps reseting location to 0,0 when used, every build 

And, of course I'm setting those TextBox Font and Theme when change it on UserControl.

And it should work the same way on the designer.

Sorry for bad english. And hope u could understand what I'm trying to achieve.

Good morning.
I have a DataGrid with cells whose wallpaper is red, green or orange.
I must allow the selection of certain cells that have the same color background.
I am testing with the "SelectionChanging" and "SelectionChanged" events, as well as with "ViewCellFormatting", but I can not avoid selecting any cell.
Any suggestions?

Thanks!

Add a button in RichTextEditor demo project, and this code in its event handler:

Why this last line asserts? I would like to set a DocumentPosition to the end of newly added "A" text (or just select it), but don't know how.