如何使用随机日期启动DateEdit [英] How to initiate a DateEdit with a random date

问题描述

我有两个DateEdit控件和一个GridControl。

我想在第一个日期编辑中分配一个随机日期，第二个DateEdit应该分配一年的差异，从这个日期开始。

相同的日期应该分配给GridControl。

代码是：

  private void mTxtDateEditFchIni_EditValueChanged（object sender，EditValueChangedEventArgs e）
 {
 
 DateTime fecha = DateTime.Now.AddYears（1）; 
 mTxtDateEditFchFin.Text = fecha.ToString（）; 
 
} 
  

mTxtDateEditfchIni是第一个文本编辑与事件editvalue

我想要一个日期在第一个任何日期，并自动第二个日期（mTxtDateEditFchFin.Text）放置一年的第一个dateedit的差异

解决方案

这是在WPF（与DevExpress）中这样做的方式：

 < Window x：Class =MiscSamples.DateRangeGridSample
 xmlns =http://schemas.microsoft.com/winfx/2006/xaml/presentation
 xmlns：x = http://schemas.microsoft.com/winfx/2006/xaml
 xmlns：dxe =http://schemas.devexpress.com/winfx/2008/xaml/editors
 xmlns：dxg =http://schemas.devexpress.com/winfx/2008/xaml/grid
 Title =DateRangeGridSampleHeight =300Width =300> 
& DockPanel> 
< StackPanel DockPanel.Dock =Top> 
< Label Content =开始日期：/> 
< dxe：DateEdit EditValue ={Binding FocusedRow.StartDate，ElementName = Table}/> 
< Label Content =结束日期：/> 
< dxe：DateEdit EditValue ={Binding FocusedRow.EndDate，ElementName = Table}/> 
< Button Content =NewClick =NewRowMargin =10/> 
< / StackPanel> 
 
< dxg：GridControl ItemsSource ={Binding}> 
< dxg：GridControl.View> 
< dxg：TableView x：Name =TableShowGroupPanel =False/> 
< / dxg：GridControl.View> 
< dxg：GridControl.Columns> 
< dxg：GridColumn FieldName =StartDate/> 
< dxg：GridColumn FieldName =EndDate/> 
< / dxg：GridControl.Columns> 
< / dxg：GridControl> 
< / DockPanel> 
< / Window> 
  

代码背后：

  public partial class DateRangeGridSample：Window 
 {
 public ObservableCollection< DateRange>数据{get;组; } 
 
 public DateRangeGridSample（）
 {
 InitializeComponent（）; 
 
 DataContext = Data = new ObservableCollection< DateRange>（）; 
} 
 
 private void NewRow（object sender，RoutedEventArgs e）
 {
 Data.Add（new DateRange（）{StartDate = DateTime.Today，EndDate = DateTime .Today.AddYears（1）}）; 
} 
} 
  

数据项：

  public class DateRange：INotifyPropertyChanged 
 {
 private DateTime _startDate; 
 private DateTime _endDate; 
 
 public DateTime StartDate 
 {
 get {return _startDate; } 
 set 
 {
 _startDate = value; 
 OnPropertyChanged（StartDate）; 
} 
} 
 
 public DateTime EndDate 
 {
 get {return _endDate; } 
 set 
 {
 _endDate = value; 
 OnPropertyChanged（EndDate）; 
} 
} 
 
 public event PropertyChangedEventHandler PropertyChanged; 
 
 protected virtual void OnPropertyChanged（string propertyName）
 {
 PropertyChangedEventHandler handler = PropertyChanged; 
 if（handler！= null）handler（this，new PropertyChangedEventArgs（propertyName））; 
} 
} 
  

结果：

• 您不会（通常）处理WPF中的任何事件（Button Click除外，也可以由命令


• 一切都是通过 DataBinding 。你真的需要知道，如果你使用WPF。


• WPF Rocks只需复制并粘贴我的代码一个文件 - >新项目 - > WPF应用程序，并自己查看结果。

Im new in WPF and c# language, And I appreciate if you can help me.

I have two DateEdit controls and a GridControl.

I want to assign a random date in first Date edit, and the 2'nd DateEdit should be assigned with a year diferrence and from this date.

The same dates should be assigned to the GridControl.

The code is:

    private void mTxtDateEditFchIni_EditValueChanged(object sender, EditValueChangedEventArgs e)
    {

        DateTime fecha = DateTime.Now.AddYears(1);
        mTxtDateEditFchFin.Text = fecha.ToString();

    }

mTxtDateEditfchIni is the first text edit with the event editvalue

I want a to put a date in first any date and automatically the 2nd date ( mTxtDateEditFchFin.Text) put a year of diferrence of first dateedit

解决方案

This is how you do that in WPF (with DevExpress):

<Window x:Class="MiscSamples.DateRangeGridSample"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"
        xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
        Title="DateRangeGridSample" Height="300" Width="300">
    <DockPanel>
        <StackPanel DockPanel.Dock="Top">
            <Label Content="Start Date:"/>
            <dxe:DateEdit EditValue="{Binding FocusedRow.StartDate, ElementName=Table}"/>
            <Label Content="End Date:"/>
            <dxe:DateEdit EditValue="{Binding FocusedRow.EndDate, ElementName=Table}"/>
            <Button Content="New" Click="NewRow" Margin="10"/>
        </StackPanel>

        <dxg:GridControl ItemsSource="{Binding}">
            <dxg:GridControl.View>
                <dxg:TableView x:Name="Table" ShowGroupPanel="False"/>
            </dxg:GridControl.View>
            <dxg:GridControl.Columns>
                <dxg:GridColumn FieldName="StartDate"/>
                <dxg:GridColumn FieldName="EndDate"/>
            </dxg:GridControl.Columns>
        </dxg:GridControl>
    </DockPanel>
</Window>

Code Behind:

public partial class DateRangeGridSample : Window
{
    public ObservableCollection<DateRange> Data { get; set; }

    public DateRangeGridSample()
    {
        InitializeComponent();

        DataContext = Data = new ObservableCollection<DateRange>();
    }

    private void NewRow(object sender, RoutedEventArgs e)
    {
        Data.Add(new DateRange() {StartDate = DateTime.Today, EndDate = DateTime.Today.AddYears(1)});
    }
}

Data Item:

public class DateRange: INotifyPropertyChanged
{
    private DateTime _startDate;
    private DateTime _endDate;

    public DateTime StartDate
    {
        get { return _startDate; }
        set
        {
            _startDate = value;
            OnPropertyChanged("StartDate");
        }
    }

    public DateTime EndDate
    {
        get { return _endDate; }
        set
        {
            _endDate = value;
            OnPropertyChanged("EndDate");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
    }
}

Result:

• You don't (normally) handle any events in WPF (except for the Button Click, which could also be replaced by a Command
• Everything is done via DataBinding. You really need to learn that if you're using WPF.
• WPF Rocks. Just copy and paste my code in a File -> New Project -> WPF Application and see the results for yourself.

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