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Time format Issue

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TimePicker

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3 Answers, 1 is accepted

answered on 24 Mar 2012, 03:16 AM

I have found a way to fix the RadTimePicker using WPF styling and event setters. First off, add a ResourceDictionary (ControlStyles.xaml):

<ResourceDictionary x:Class="EventSetterWPF.ControlStyles"
                    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:tc="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Input">
    
    
    <Style TargetType="{x:Type tc:RadTimePicker}">
        <EventSetter Event="ParseDateTimeValue" Handler="RadTimePicker_ParseDateTimeValue" />
    </Style>
    
</ResourceDictionary>

Next off, add a codebehind for the ResourceDictionary (ControlStyles.xaml.cs)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using Telerik.Windows.Controls;

namespace EventSetterWPF
{
    
    
    public partial class ControlStyles : ResourceDictionary
    {

        public ControlStyles()
        {
            InitializeComponent();
        }

        public void RadTimePicker_ParseDateTimeValue(object sender, ParseDateTimeEventArgs e)
        {
            if (e.IsParsingSuccessful)
            {
                string originalString = e.TextToParse.Replace(":", "");
                if (!string.IsNullOrEmpty(originalString) && originalString.Length == 4 && originalString.StartsWith("0"))
                {
                    int enteredHour = -1;
                    int enteredMinutes = -1;
                    if (int.TryParse(originalString.Substring(0, 2), out enteredHour) &&
                        (int.TryParse(originalString.Substring(2, 2), out enteredMinutes)) &&
                        e.Result.HasValue)
                    {
                        DateTime originalValue = e.Result.Value;
                        DateTime? newValue = new DateTime(originalValue.Year, originalValue.Month, originalValue.Day,
                            enteredHour, enteredMinutes, 0);
                        e.Result = newValue;
                    }
                }
            }
        }

    }

}

Add the resource dictionary to App.xaml:

<Application x:Class="EventSetterWPF.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             StartupUri="TestRadTimePicker.xaml">
    <Application.Resources>
        <ResourceDictionary Source="ControlStyles.xaml" /> 
    </Application.Resources>
</Application>

Now, all your RadTimePicker will have this custom datetime parsing. Similar strategy can be used for RadDatePicker and RadDateTimePicker. I had to fix these issues at work today for multiple Telerik Controls.

For example, typing "0130" did not parse to 01:30 AM, rather it resulted in 13:00 (PM) being set. Using the strategy above made the parsing of the RadTimePicker work again.

I included a blog article for the interested reader here:

http://toreaurstad.blogspot.com/2012/03/styling-user-controls-in-wpf-with.html