【发布时间】：2010-07-06 12:51:27
【问题描述】：
WPF 中是否有任何时间输入/选择器控件可用，例如日期选择器？
谢谢
【问题讨论】：
【发布时间】：2010-07-06 12:51:27
【问题描述】：
我在网上找不到，所以我从头开始创建它。我并不完全理解依赖属性，所以我暂时省略了这些。该控件是一个 12 小时时间选择器控件。我是 WPF 的新手，所以我不完全理解所有新的语言语法，但是这个控件可以在我在家创建的项目中为我解决问题。
支持将时间设置为 DateTime 或 TimeSpan。
下面我将粘贴 XAML 和代码隐藏。 XAML
<UserControl x:Class="WorkDayManager3.WPF.UserControls.TimeControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="35" d:DesignWidth="100">
<Border BorderBrush="LightBlue" BorderThickness="1" Margin="1">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="5" />
<ColumnDefinition />
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<TextBox x:Name="txtHours" BorderThickness="0" MaxLength="2" TextAlignment="Center" HorizontalAlignment="Center" VerticalAlignment="Center" Text="1" KeyUp="txt_KeyUp" MouseWheel="txt_MouseWheel" PreviewKeyUp="txt_PreviewKeyUp" />
<TextBlock Text=":" Grid.Column="1" HorizontalAlignment="Center" VerticalAlignment="Center" />
<TextBox x:Name="txtMinutes" BorderThickness="0" MaxLength="2" TextAlignment="Center" Grid.Column="2" HorizontalAlignment="Center" VerticalAlignment="Center" Text="00" KeyUp="txt_KeyUp" MouseWheel="txt_MouseWheel" PreviewKeyUp="txt_PreviewKeyUp" />
<TextBox x:Name="txtAmPm" BorderThickness="0" MaxLength="2" TextAlignment="Center" Grid.Column="3" HorizontalAlignment="Left" VerticalAlignment="Center" PreviewTextInput="txtAmPm_PreviewTextInput" Text="AM" KeyUp="txt_KeyUp" MouseWheel="txt_MouseWheel" Padding="0, 0, 3, 0" />
<Grid Grid.Column="4">
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<Button x:Name="btnUp" Focusable="False" Click="btnUp_Click">
<TextBlock Text="p" FontFamily="Wingdings 3" HorizontalAlignment="Center" VerticalAlignment="Center" />
</Button>
<Button x:Name="btnDown" Grid.Row="1" Focusable="False" Click="btnDown_Click">
<TextBlock Text="q" FontFamily="Wingdings 3" HorizontalAlignment="Center" VerticalAlignment="Center" />
</Button>
</Grid>
</Grid>
</Border>
</UserControl>
代码隐藏
using System;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
namespace WorkDayManager3.WPF.UserControls
{
/// <summary>
/// Interaction logic for TimeControl.xaml
/// </summary>
public partial class TimeControl : UserControl
{
public TimeControl()
{
InitializeComponent();
}
#region Properties
/// <summary>
/// Gets or sets the date time value.
/// </summary>
/// <value>The date time value.</value>
public DateTime? DateTimeValue
{
get
{
string hours = this.txtHours.Text;
string minutes = this.txtMinutes.Text;
string amPm = this.txtAmPm.Text;
if (!string.IsNullOrWhiteSpace(hours)
&& !string.IsNullOrWhiteSpace(minutes)
&& !string.IsNullOrWhiteSpace(amPm))
{
string value = string.Format("{0}:{1} {2}", this.txtHours.Text, this.txtMinutes.Text, this.txtAmPm.Text);
DateTime time = DateTime.Parse(value);
return time;
}
else
{
return null;
}
}
set
{
DateTime? time = value;
if (time.HasValue)
{
string timeString = time.Value.ToShortTimeString();
//9:54 AM
string[] values = timeString.Split(':', ' ');
if (values.Length == 3)
{
this.txtHours.Text = values[0];
this.txtMinutes.Text = values[1];
this.txtAmPm.Text = values[2];
}
}
}
}
/// <summary>
/// Gets or sets the time span value.
/// </summary>
/// <value>The time span value.</value>
public TimeSpan? TimeSpanValue
{
get
{
DateTime? time = this.DateTimeValue;
if (time.HasValue)
{
return new TimeSpan(time.Value.Ticks);
}
else
{
return null;
}
}
set
{
TimeSpan? timeSpan = value;
if (timeSpan.HasValue)
{
this.DateTimeValue = new DateTime(timeSpan.Value.Ticks);
}
}
}
#endregion
#region Event Subscriptions
/// <summary>
/// Handles the Click event of the btnDown control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.RoutedEventArgs"/> instance containing the event data.</param>
private void btnDown_Click(object sender, RoutedEventArgs e)
{
string controlId = this.GetControlWithFocus().Name;
if ("txtHours".Equals(controlId))
{
this.ChangeHours(false);
}
else if ("txtMinutes".Equals(controlId))
{
this.ChangeMinutes(false);
}
else if ("txtAmPm".Equals(controlId))
{
this.ToggleAmPm();
}
}
/// <summary>
/// Handles the Click event of the btnUp control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.RoutedEventArgs"/> instance containing the event data.</param>
private void btnUp_Click(object sender, RoutedEventArgs e)
{
string controlId = this.GetControlWithFocus().Name;
if ("txtHours".Equals(controlId))
{
this.ChangeHours(true);
}
else if ("txtMinutes".Equals(controlId))
{
this.ChangeMinutes(true);
}
else if ("txtAmPm".Equals(controlId))
{
this.ToggleAmPm();
}
}
/// <summary>
/// Handles the PreviewTextInput event of the txtAmPm control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.Input.TextCompositionEventArgs"/> instance containing the event data.</param>
private void txtAmPm_PreviewTextInput(object sender, TextCompositionEventArgs e)
{
// prevent users to type text
e.Handled = true;
}
/// <summary>
/// Handles the KeyUp event of the txt control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.Input.KeyEventArgs"/> instance containing the event data.</param>
private void txt_KeyUp(object sender, KeyEventArgs e)
{
// check for up and down keyboard presses
if (Key.Up.Equals(e.Key))
{
btnUp_Click(this, null);
}
else if (Key.Down.Equals(e.Key))
{
btnDown_Click(this, null);
}
}
/// <summary>
/// Handles the MouseWheel event of the txt control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.Input.MouseWheelEventArgs"/> instance containing the event data.</param>
private void txt_MouseWheel(object sender, MouseWheelEventArgs e)
{
if (e.Delta > 0)
{
btnUp_Click(this, null);
}
else
{
btnDown_Click(this, null);
}
}
/// <summary>
/// Handles the PreviewKeyUp event of the txt control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.Input.KeyEventArgs"/> instance containing the event data.</param>
private void txt_PreviewKeyUp(object sender, KeyEventArgs e)
{
TextBox textBox = (TextBox)sender;
// make sure all characters are number
bool allNumbers = textBox.Text.All(Char.IsNumber);
if (!allNumbers)
{
e.Handled = true;
return;
}
// make sure user did not enter values out of range
int value;
int.TryParse(textBox.Text, out value);
if ("txtHours".Equals(textBox.Name) && value > 12)
{
EnforceLimits(e, textBox);
}
else if ("txtMinutes".Equals(textBox.Name) && value > 59)
{
EnforceLimits(e, textBox);
}
}
#endregion
#region Methods
/// <summary>
/// Changes the hours.
/// </summary>
/// <param name="isUp">if set to <c>true</c> [is up].</param>
private void ChangeHours(bool isUp)
{
int value = Convert.ToInt32(this.txtHours.Text);
if (isUp)
{
value += 1;
if (value == 13)
{
value = 1;
}
}
else
{
value -= 1;
if (value == 0)
{
value = 12;
}
}
this.txtHours.Text = Convert.ToString(value);
}
/// <summary>
/// Changes the minutes.
/// </summary>
/// <param name="isUp">if set to <c>true</c> [is up].</param>
private void ChangeMinutes(bool isUp)
{
int value = Convert.ToInt32(this.txtMinutes.Text);
if (isUp)
{
value += 1;
if (value == 60)
{
value = 0;
}
}
else
{
value -= 1;
if (value == -1)
{
value = 59;
}
}
string textValue = Convert.ToString(value);
if (value < 10)
{
textValue = "0" + Convert.ToString(value);
}
this.txtMinutes.Text = textValue;
}
/// <summary>
/// Enforces the limits.
/// </summary>
/// <param name="e">The <see cref="System.Windows.Input.KeyEventArgs"/> instance containing the event data.</param>
/// <param name="textBox">The text box.</param>
/// <param name="enteredValue">The entered value.</param>
private static void EnforceLimits(KeyEventArgs e, TextBox textBox)
{
string enteredValue = GetEnteredValue(e.Key);
string text = textBox.Text.Replace(enteredValue, "");
if (string.IsNullOrEmpty(text))
{
text = enteredValue;
}
textBox.Text = text;
e.Handled = true;
}
/// <summary>
/// Gets the control with focus.
/// </summary>
/// <returns></returns>
private TextBox GetControlWithFocus()
{
TextBox txt = new TextBox();
if (this.txtHours.IsFocused)
{
txt = this.txtHours;
}
else if (this.txtMinutes.IsFocused)
{
txt = this.txtMinutes;
}
else if (this.txtAmPm.IsFocused)
{
txt = this.txtAmPm;
}
return txt;
}
/// <summary>
/// Gets the entered value.
/// </summary>
/// <param name="key">The key.</param>
/// <returns></returns>
private static string GetEnteredValue(Key key)
{
string value = string.Empty;
switch (key)
{
case Key.D0:
case Key.NumPad0:
value = "0";
break;
case Key.D1:
case Key.NumPad1:
value = "1";
break;
case Key.D2:
case Key.NumPad2:
value = "2";
break;
case Key.D3:
case Key.NumPad3:
value = "3";
break;
case Key.D4:
case Key.NumPad4:
value = "4";
break;
case Key.D5:
case Key.NumPad5:
value = "5";
break;
case Key.D6:
case Key.NumPad6:
value = "6";
break;
case Key.D7:
case Key.NumPad7:
value = "7";
break;
case Key.D8:
case Key.NumPad8:
value = "8";
break;
case Key.D9:
case Key.NumPad9:
value = "9";
break;
}
return value;
}
/// <summary>
/// Toggles the am pm.
/// </summary>
private void ToggleAmPm()
{
if ("AM".Equals(this.txtAmPm.Text))
{
this.txtAmPm.Text = "PM";
}
else
{
this.txtAmPm.Text = "AM";
}
}
#endregion
}
}
这就是控件，您可以根据需要随意进行修改。它并不完美，但比我发现的其他控件要好
【讨论】：