SelectionRange 构造函数

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

初始化 SelectionRange 类的新实例。

重载

SelectionRange()	初始化 SelectionRange 类的新实例。
SelectionRange(SelectionRange)	使用指定的选择范围初始化 SelectionRange 类的新实例。
SelectionRange(DateTime, DateTime)	使用指定的起始和结束日期初始化 SelectionRange 类的新实例。

SelectionRange()

初始化 SelectionRange 类的新实例。

public:
 SelectionRange();

public SelectionRange ();

Public Sub New ()

示例

以下示例创建一个 SelectionRange 对象，设置其 Start 和 End 属性，并将 对象SelectionRangeSelectionRange分配给控件MonthCalendar的 属性。 DateChanged引发事件时，Start和 End 属性值将显示在文本框中。 此示例假定你有 一个具有两TextBox个FormButton控件的 ， 和 一个MonthCalendar控件。

private:
   void button1_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      // Create a SelectionRange object and set its Start and End properties.
      SelectionRange^ sr = gcnew SelectionRange;
      sr->Start = DateTime::Parse( this->textBox1->Text );
      sr->End = DateTime::Parse( this->textBox2->Text );
      
      /* Assign the SelectionRange object to the
            SelectionRange property of the MonthCalendar control. */
      this->monthCalendar1->SelectionRange = sr;
   }

   void monthCalendar1_DateChanged( Object^ /*sender*/, DateRangeEventArgs^ /*e*/ )
   {
      /* Display the Start and End property values of
            the SelectionRange object in the text boxes. */
      this->textBox1->Text = monthCalendar1->SelectionRange->Start.Date.ToShortDateString();
      this->textBox2->Text = monthCalendar1->SelectionRange->End.Date.ToShortDateString();
   }

private void button1_Click(object sender, System.EventArgs e)
{
   // Create a SelectionRange object and set its Start and End properties.
   SelectionRange sr = new SelectionRange();
   sr.Start = DateTime.Parse(this.textBox1.Text);
   sr.End = DateTime.Parse(this.textBox2.Text);
   /* Assign the SelectionRange object to the 
      SelectionRange property of the MonthCalendar control. */
   this.monthCalendar1.SelectionRange = sr;
}

private void monthCalendar1_DateChanged(object sender, DateRangeEventArgs e)
{
   /* Display the Start and End property values of 
      the SelectionRange object in the text boxes. */
   this.textBox1.Text = 
     monthCalendar1.SelectionRange.Start.Date.ToShortDateString();
   this.textBox2.Text = 
     monthCalendar1.SelectionRange.End.Date.ToShortDateString();
}

Private Sub button1_Click(sender As Object, _
  e As EventArgs) Handles button1.Click
   ' Create a SelectionRange object and set its Start and End properties.
   Dim sr As New SelectionRange()
   sr.Start = DateTime.Parse(Me.textBox1.Text)
   sr.End = DateTime.Parse(Me.textBox2.Text)
   ' Assign the SelectionRange object to the
   ' SelectionRange property of the MonthCalendar control. 
   Me.monthCalendar1.SelectionRange = sr
End Sub 


Private Sub monthCalendar1_DateChanged(sender As Object, _
  e As DateRangeEventArgs) Handles monthCalendar1.DateChanged
   ' Display the Start and End property values of
   ' the SelectionRange object in the text boxes. 
   Me.textBox1.Text = monthCalendar1.SelectionRange.Start.Date.ToShortDateString()
   Me.textBox2.Text = monthCalendar1.SelectionRange.End.Date.ToShortDateString()
End Sub

注解

使用此构造函数时， Start 和 End 值设置为 null 。

SelectionRange(SelectionRange)

使用指定的选择范围初始化 SelectionRange 类的新实例。

public:
 SelectionRange(System::Windows::Forms::SelectionRange ^ range);

public SelectionRange (System.Windows.Forms.SelectionRange range);

new System.Windows.Forms.SelectionRange : System.Windows.Forms.SelectionRange -> System.Windows.Forms.SelectionRange

Public Sub New (range As SelectionRange)

参数

range

SelectionRange

现有的 SelectionRange。

示例

以下示例创建一个 SelectionRange 对象，设置其 Start 和 End 属性，并将 对象SelectionRangeSelectionRange分配给控件MonthCalendar的 属性。 DateChanged引发事件时，Start和 End 属性值将显示在文本框中。 此示例假定你有 一个具有两TextBox个FormButton控件的 ， 和 一个MonthCalendar控件。

private:
   void button1_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      // Create a SelectionRange object and set its Start and End properties.
      SelectionRange^ sr = gcnew SelectionRange;
      sr->Start = DateTime::Parse( this->textBox1->Text );
      sr->End = DateTime::Parse( this->textBox2->Text );
      
      /* Assign the SelectionRange object to the
            SelectionRange property of the MonthCalendar control. */
      this->monthCalendar1->SelectionRange = sr;
   }

   void monthCalendar1_DateChanged( Object^ /*sender*/, DateRangeEventArgs^ /*e*/ )
   {
      /* Display the Start and End property values of
            the SelectionRange object in the text boxes. */
      this->textBox1->Text = monthCalendar1->SelectionRange->Start.Date.ToShortDateString();
      this->textBox2->Text = monthCalendar1->SelectionRange->End.Date.ToShortDateString();
   }

private void button1_Click(object sender, System.EventArgs e)
{
   // Create a SelectionRange object and set its Start and End properties.
   SelectionRange sr = new SelectionRange();
   sr.Start = DateTime.Parse(this.textBox1.Text);
   sr.End = DateTime.Parse(this.textBox2.Text);
   /* Assign the SelectionRange object to the 
      SelectionRange property of the MonthCalendar control. */
   this.monthCalendar1.SelectionRange = sr;
}

private void monthCalendar1_DateChanged(object sender, DateRangeEventArgs e)
{
   /* Display the Start and End property values of 
      the SelectionRange object in the text boxes. */
   this.textBox1.Text = 
     monthCalendar1.SelectionRange.Start.Date.ToShortDateString();
   this.textBox2.Text = 
     monthCalendar1.SelectionRange.End.Date.ToShortDateString();
}

Private Sub button1_Click(sender As Object, _
  e As EventArgs) Handles button1.Click
   ' Create a SelectionRange object and set its Start and End properties.
   Dim sr As New SelectionRange()
   sr.Start = DateTime.Parse(Me.textBox1.Text)
   sr.End = DateTime.Parse(Me.textBox2.Text)
   ' Assign the SelectionRange object to the
   ' SelectionRange property of the MonthCalendar control. 
   Me.monthCalendar1.SelectionRange = sr
End Sub 


Private Sub monthCalendar1_DateChanged(sender As Object, _
  e As DateRangeEventArgs) Handles monthCalendar1.DateChanged
   ' Display the Start and End property values of
   ' the SelectionRange object in the text boxes. 
   Me.textBox1.Text = monthCalendar1.SelectionRange.Start.Date.ToShortDateString()
   Me.textBox2.Text = monthCalendar1.SelectionRange.End.Date.ToShortDateString()
End Sub

注解

为 Start 和 End 属性值分配了Start所SelectionRange分配对象的 和 End 属性值。

另请参阅

• Start
• End

SelectionRange(DateTime, DateTime)

使用指定的起始和结束日期初始化 SelectionRange 类的新实例。

public:
 SelectionRange(DateTime lower, DateTime upper);

public SelectionRange (DateTime lower, DateTime upper);

new System.Windows.Forms.SelectionRange : DateTime * DateTime -> System.Windows.Forms.SelectionRange

Public Sub New (lower As DateTime, upper As DateTime)

参数

lower

DateTime

SelectionRange 中的起始日期。

upper

DateTime

SelectionRange 中的结束日期。

示例

以下示例基于单击 时输入到两个MonthCalendar控件中的两个Button日期设置SelectionRange控件TextBox的 属性。 此代码假定已在 上创建了一个MonthCalendar控件的新实例、两TextBox个Button控件和 。Form 可以考虑添加代码来验证 Text 分配给文本框的 ，以验证它们是否包含有效日期。

private:
   void button1_Click( Object^ sender, EventArgs^ e )
   {
      // Set the SelectionRange with start and end dates from text boxes.
      try
      {
         monthCalendar1->SelectionRange = gcnew SelectionRange(
            DateTime::Parse( textBox1->Text ),
            DateTime::Parse( textBox2->Text ) );
      }
      catch ( Exception^ ex ) 
      {
         MessageBox::Show( ex->Message );
      }
   }

private void button1_Click(object sender,
                           EventArgs e)
{
   // Set the SelectionRange with start and end dates from text boxes.
   try
   {
      monthCalendar1.SelectionRange = new SelectionRange(
        DateTime.Parse(textBox1.Text),
        DateTime.Parse(textBox2.Text));
   }
   catch(Exception ex)
   {
      MessageBox.Show(ex.Message);
   }
}

Private Sub button1_Click(sender As Object, e As EventArgs)
   ' Set the SelectionRange with start and end dates from text boxes.
   Try
      monthCalendar1.SelectionRange = New SelectionRange( _
        DateTime.Parse(textBox1.Text), _
        DateTime.Parse(textBox2.Text))
   Catch ex As Exception
      MessageBox.Show(ex.Message)
   End Try
End Sub

注解

注意

lowerDateTime如果值大于DateTimeupper值，则lower该值将分配给 End 属性，而不是 Start 属性。

另请参阅

• Start
• End