I am using DateTimePicker on WPF and I would like to know if there is a way to modify the bacjgroud color of the DateTimePicker for a couple of dates.

Thank you in advance.

Hi!  I am seeking assistance with this column in WPF, in a RadGridView:

<telerik:GridViewDataColumn DataMemberBinding="{Binding TargetDateET, StringFormat={}{0:MM/dd HH:mm}}" Header="Target Date" />

It displays DateTime values in the grid in the following format: "MM/dd HH:mm"

The issue is that the FilterDescriptor is in this format: "MM/dd/yyyy HH:mm:ss tt"

And when the filters are saved and presented to the user, they are different.



What I can do to manage this data in the same format? (Without having to generate a new variable that is a string and that returns the correct format) Help! Thanks in advance! Juan

Hello,

How can I change the header button text color and the week number text color (see attachment)?

Kind regards

Hi

I use the RadDateTimePicker and have a button ("Next"):

When now the user changes the date/time value to an invalid date/time an error is shown:

When the user clicks on the "Next" button the DateTimeText disapears and is empty and an error is schown:

My Question:
Is it possible to set the DateTimeText to the previous wrong formatted date/time (120000000000.07.23 08:49) like this ? 

I have tried to overload the method  OnParseDateTime and set the CurrentDateTimeText but it's not working.

Hi. 

I've tried to use RadDateTimePicker inside RadGridView, but datepicket is not showing (examle from: WPF DateTimePicker - How to use RadDateTimePicker in a Grid - Telerik UI for WPF).  Tried to add control outside grid but without any effect. 

Project is referenced to Telerik.Windows.Data.dll, Telerik.Windows.Controls, Telerik.Windows.Controls.Input, Telerik.Windows.Controls.GridView...

<Window x:Class="Test"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"         
        Title="Test" Height="450" Width="800">
    <Grid>
    
        <telerik:RadDateTimePicker                                 
                                InputMode="DatePicker"
                                telerik:DropDownButtonExtensions.FocusContentOnOpen="True"                              
                                SelectedValue="{Binding Established, Mode=TwoWay}"/>
        
        <telerik:RadGridView Name="radGridView" 
                     AutoGenerateColumns="False">
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn Header="Name" 
                                    DataMemberBinding="{Binding Name}" />
                <telerik:GridViewDataColumn Header="Established" 
                                    DataMemberBinding="{Binding Established}">
                    <telerik:GridViewDataColumn.CellEditTemplate>
                        <DataTemplate>
                            <telerik:RadDateTimePicker                                 
                                InputMode="DatePicker"
                                telerik:DropDownButtonExtensions.FocusContentOnOpen="True"
                              
                                SelectedValue="{Binding Established, Mode=TwoWay}"/>
                        </DataTemplate>
                    </telerik:GridViewDataColumn.CellEditTemplate>
                </telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn Header="Stadium" 
                                    DataMemberBinding="{Binding StadiumCapacity}" 
                                    DataFormatString="{}{0:N0}" />
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>
    </Grid>
</Window>

Hello, 

I created a new template for the RadDateTimePicker because I overrided the Clock Part.

As part of the changes I added a Tooltip which shows the date time if not null. In the Watermark control part of the template I show the SelectedValue property that is bound to the ViewModel - TwoWayBinding. The string format of the DateTime is full date: dd/MM/yyyy with full time: HH:mm:ss. So I see the parsed Text on the control. 

I can't find an easy way to show the tooltip in the same format as the display date. I can't set the Tooltio content to RelativeSource Path=SelectedValue because it shows the DateTime in orginal format.

I also can't show in the Tooltio the DisplatText because even if binding OneWay, the date is flickering in every change like binding is wrong.

In the Style of the RadDateTimePicker I have access to SelectedValue, SelectedDateTime,SelectedTime properties but it seems that you convert the Date Time to a text inside the control code because it doesn't work on the Tooltip.

Do you have any solution for that?

Hello：

About the RadDateTimePicker,

when I set the telerik:ValidationErrorTemplateHelper.ShowWhenFocused = "True"

It only doesn't work on Theme="Expression_Dark".

The others themes seems no problem.

Hello,

I am insterested on change the RadDateTimePicker.

1. When set the control to change the minutes/seconds, the default control template shows all the possible options in buttons, a little bit annoying for the user.

The request: like Android, the user wants three numbers (hour, minute, seconds) that he can move up/down. Instead of scrolling we can use up/down arrows.

2. Add a button in the control to change 12/24 format and visibilty property for this button.

Questions:

1. Which approach do you suggest?

Override all the TimeControl template? or update tue default style ?

2. Which properties should I bind in case that I override the TimePicker to create a new template with three up down controls where each control will handle hours/minutes/seconds ?

3. Do you have any control that can set the number value with up down like Android (see attached picture)

4. For point 2, how can I add a control that will be set the date time format off the original RadTimePicker? 

I am not sure that creating a new custom control which contains the new control and telerik control will be the best approach. I want to add the control to the original one in the style.

5. Which property should be set to show 24 format. In the example you are showing a property that doesn't update the time correctly.

6. Do you have advanced examples with many styles and changes on Control Template ?

All the examples on the site are quiet simple, maybe did you get from users new examples.

Thanks,

This forum is so helpful.

I have used DateTimePicker with selectable date start and end, when binding the selected date with two way mode and entering the earlier date manually I am getting below error. Any idea?

<telerik:RadDateTimePicker x:Name="cmbDatePicker"
                            InputMode="DatePicker"
                            VerticalAlignment="Center"
                            HorizontalAlignment="Center"
                            Width="250" 
                            Height="30"
                            IsInputRestrictedToSelectableDates="True"
                            SelectableDateStart="{Binding SelectableDateStart}"
                            SelectableDateEnd="{Binding SelectableDateEnd}"
                            SelectedDate="{Binding ScheduledDate, Mode=TwoWay}"
                            />

I updated our telerik to the latest NoXaml version of the libraries.

I get the following binding error:

Cannot find source for binding with reference 'ElementName=TodayButtonBorder'. BindingExpression:Path=CornerRadius; DataItem=null; target element is 'RadButton' (Name='TodayButton'); target property is 'CornerRadius' (type 'CornerRadius')

I think this is a problem within the DateTimePicker control. I don't have any controls by the name 'TodayButton'.

Can someone from telerik flag this as a problem?