WPF 自定义DateTimePicker控件，实现时间设置与选择

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想做一个定时器功能，需要用到DateTimePicker控件。可是发现WPF只有一个设置日期的DatePicker控件，没有设置时间的DateTimePicker控件。这样很不方便，所以就自己做了一个，代码相对简洁，功能可以再做优化。另外考虑到扩展和UI体验，这里创建的是usercontrol。

先看看效果：

前台代码：

    <Grid>        <Border BorderThickness="1" BorderBrush="Black">            <Grid >                <Grid.ColumnDefinitions>                    <ColumnDefinition></ColumnDefinition>                    <ColumnDefinition Width="3"></ColumnDefinition>                    <ColumnDefinition></ColumnDefinition>                    <ColumnDefinition Width="3"></ColumnDefinition>                    <ColumnDefinition></ColumnDefinition>                    <ColumnDefinition></ColumnDefinition>                </Grid.ColumnDefinitions>                <TextBox Name="textbox_hour" BorderThickness="0" TextChanged="numtextboxchanged" SelectionChanged="textbox_hour_SelectionChanged" VerticalContentAlignment="Center" HorizontalContentAlignment="Center" Grid.Column="0"></TextBox>                <TextBlock Grid.Column="1" VerticalAlignment="Center" HorizontalAlignment="Center">:</TextBlock>                <TextBox Name="textbox_minute"  BorderThickness="0" TextChanged="numtextboxchanged" SelectionChanged="textbox_hour_SelectionChanged" VerticalContentAlignment="Center" HorizontalContentAlignment="Center"  Grid.Column="2"></TextBox>                <TextBlock Grid.Column="3" VerticalAlignment="Center" HorizontalAlignment="Center">:</TextBlock>                <TextBox Name="textbox_second"  BorderThickness="0" TextChanged="numtextboxchanged" SelectionChanged="textbox_hour_SelectionChanged" VerticalContentAlignment="Center" HorizontalContentAlignment="Center"  Grid.Column="4"></TextBox>                <Grid Grid.Column="5">                    <Grid.RowDefinitions>                        <RowDefinition></RowDefinition>                        <RowDefinition></RowDefinition>                    </Grid.RowDefinitions>                    <Button Name="button_up" Click="button_up_Click" Grid.Row="0" FontSize="5">▲</Button>                    <Button Name="button_down" Click="button_down_Click" Grid.Row="1" FontSize="5">▼</Button>                </Grid>            </Grid>        </Border>    </Grid>

后台代码：

    public partial class DateTimePicker : UserControl    {        #region 重要变量        #endregion        #region 构造函数        /// <summary>        /// 构造函数        /// </summary>        public DateTimePicker()        {            InitializeComponent();            this.initParameters();            this.textbox_minute.Background = Brushes.White;            this.textbox_second.Background = Brushes.White;            this.textbox_hour.Background = Brushes.White;        }        #endregion        #region 业务处理函数        /// <summary>        /// 更改选中状态        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void textbox_hour_SelectionChanged(object sender, RoutedEventArgs e)        {            TextBox tb = sender as TextBox;            if (tb != null)            {                switch (tb.Name)                {                    case "textbox_hour":                        tb.Background = Brushes.Gray;                        this.textbox_minute.Background = Brushes.White;                        this.textbox_second.Background = Brushes.White;                        break;                    case "textbox_minute":                        tb.Background = Brushes.Gray;                        this.textbox_hour.Background = Brushes.White;                        this.textbox_second.Background = Brushes.White;                        break;                    case "textbox_second":                        tb.Background = Brushes.Gray;                        this.textbox_hour.Background = Brushes.White;                        this.textbox_minute.Background = Brushes.White;                        break;                }            }        }        /// <summary>        /// 向上加时        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void button_up_Click(object sender, RoutedEventArgs e)        {            if (this.textbox_hour.Background == Brushes.Gray)            {                int temp = System.Int32.Parse(this.textbox_hour.Text);                temp++;                if (temp > 24)                {                    temp = 0;                }                this.textbox_hour.Text = temp.ToString();            }            else if (this.textbox_minute.Background == Brushes.Gray)            {                int temp = System.Int32.Parse(this.textbox_minute.Text);                temp++;                if (temp > 60)                {                    temp = 0;                }                this.textbox_minute.Text = temp.ToString();            }            else if (this.textbox_second.Background == Brushes.Gray)            {                int temp = System.Int32.Parse(this.textbox_second.Text);                temp++;                if (temp > 60)                {                    temp = 0;                }                this.textbox_second.Text = temp.ToString();            }        }        /// <summary>        /// 向下减时        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void button_down_Click(object sender, RoutedEventArgs e)        {            if (this.textbox_hour.Background == Brushes.Gray)            {                int temp = System.Int32.Parse(this.textbox_hour.Text);                temp--;                if (temp < 0)                {                    temp = 24;                }                this.textbox_hour.Text = temp.ToString();            }            else if (this.textbox_minute.Background == Brushes.Gray)            {                int temp = System.Int32.Parse(this.textbox_minute.Text);                temp--;                if (temp < 0)                {                    temp = 60;                }                this.textbox_minute.Text = temp.ToString();            }            else if (this.textbox_second.Background == Brushes.Gray)            {                int temp = System.Int32.Parse(this.textbox_second.Text);                temp--;                if (temp < 0)                {                    temp = 60;                }                this.textbox_second.Text = temp.ToString();            }        }        /// <summary>        /// 初始化参数设置        /// </summary>        private void initParameters()        {            string strt = System.DateTime.Now.ToString("HH:mm:ss");            this.textbox_hour.Text = strt.Split(':')[0];            this.textbox_minute.Text = strt.Split(':')[1];            this.textbox_second.Text = strt.Split(':')[2];        }        /// <summary>        /// 数字标准化处理        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void numtextboxchanged(object sender, TextChangedEventArgs e)        {            TextBox tb = sender as TextBox;            if (tb != null)            {                if ((this.isNum(tb.Text) == false) || (tb.Text.Length > 2))                {                    tb.Text = "0";                    MessageBox.Show("请输入正确的时间！", "警告！");                    return;                }            }        }        /// <summary>        /// 判断是否为数字，是--->true，否--->false        /// </summary>        /// <param name="str"></param>        /// <returns></returns>        private bool isNum(string str)        {            bool ret = true;            foreach (char c in str)            {                if ((c < 48) || (c > 57))                {                    return false;                }            }            return ret;        }        #endregion    }

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