add feture to datetimepicker

[ebrahim]

hi

i have tow problem

1-how to change backcolor all friday(days) on calendar(datetimepicker)

my code not work

private void radDateTimePickerStart_ElementRender(object sender, RenderElementEventArgs e)
        {
            if (e.Day.Date.DayOfWeek==DayOfWeek.Friday)
            {
               
                e.Element.BackColor = Color.Red;


            }
           
        }

2-in atache image

title calendar not change CultureInfo("fa-IR", true);

[Dinko | Tech Support Engineer]

Hi Ebrahim,

Thank you for the provided image.

I have tried the code snippet your post and it is working as expected. The Fridays in the current month have different colors. Keep in mind that the cells are reused so you will need to reset the color otherwise the color will be applied to different cells. Check the following code snippet and let me know if it works for you.

private void Calendar_ElementRender(object sender, RenderElementEventArgs e)
{
    if (e.Day.Date.DayOfWeek == DayOfWeek.Friday)
    {
        e.Element.BackColor = Color.Bisque;
    }
    else
    {
        e.Element.ResetValue(LightVisualElement.BackColorProperty, ValueResetFlags.Local);
    }
}

As for your second question, you are right that when PersianCalendar is used, zooming years will not show the correct year. We are already aware of this behavior and it is logged in our Feedback Portal where you can track its progress. At this moment of writing this reply, I can't suggest a suitable workaround for this behavior. However, I have increased the priority of the feedback item so that our development team could consider fixing this in one of our next releases.

Regards,
Dinko
Progress Telerik

[ebrahim]

hi mr dinko

by your code The headers of the week are also colored. It is clear in the attached photo

[Dinko | Tech Support Engineer]

You are right. When changing the months at some point the color is applied to the top row. What you can do is to extend the IF clause. You can check if the Row property of the e.Element is bigger than 0.

private void Calendar_ElementRender(object sender, RenderElementEventArgs e)
{
    var cell = e.Element as CalendarCellElement;
    if (e.Day.Date.DayOfWeek == DayOfWeek.Friday && (cell.Row > 0))
    {
        e.Element.BackColor = Color.Bisque;
    }
    else
    {
        e.Element.ResetValue(LightVisualElement.BackColorProperty, ValueResetFlags.Local);
    }
}

[ebrahim]

HI MR DINKO

TANKS

Yes it did