This topic demonstrates how to use the GroupIntervalEnum.DateSpan member in C1TrueDBGrid.

Complete the following steps:

1. Start a new .NET project.
2. Open the Toolbox and add a C1TrueDBGrid control to the form.
3. Open the C1TrueDBGrid Tasks menu, click the drop-down arrow in the Choose Data Source box, and click Add Project Data Source.
4. In the adapter's Data Source Configuration Wizard, either select a connection to C1NWind.mdb or create a new connection to this database.
5. On the Choose your database objects page of the wizard, select all fields in the Employees table and type "Employees" into the DataSet name box, and then finish out the wizard.
6. Visual Studio adds the following code to the Form_Load event:

   To write code in Visual Basic

   Visual Basic	Copy Code
   Me.EmployeesTableAdapter.Fill(Me.Employees._Employees)

   To write code in C#

   C#	Copy Code
   this.employeesTableAdapter.Fill(this.Employees._Employees);

7. Set the DataView property to DataViewEnum.GroupBy.

   In the Designer

   In the C1TrueDBGrid Tasks menu, select GroupBy from the Data Layout drop-down list:

   
   

   In Code

   Add the following code to the Form_Load event:

   To write code in Visual Basic

   Visual Basic	Copy Code
   Me.C1TrueDBGrid1.DataView = C1.Win.C1TrueDBGrid.DataViewEnum.GroupBy

   To write code in C#

   C#	Copy Code
   this.c1TrueDBGrid1.DataView = C1.Win.C1TrueDBGrid.DataViewEnum.GroupBy;

8. Open the C1TrueDBGrid Designer by selecting Designer from the C1TrueDBGrid Tasks menu.
9. Select the NextMeeting column by clicking on it in the right pane.
   

   The column can also be selected by choosing NextMeeting from the drop-down list in the toolbar.

   
   
10. Set the Interval property to GroupIntervalEnum.DateSpan.

    In the Designer

    Locate the Interval property in the left pane of the C1TrueDBGrid Designer and set it to DateSpan.

    
    

    In Code

    Add the following code to the Form_Load event:

    To write code in Visual Basic

    Visual Basic	Copy Code
    ' Set the GroupInfo.Interval of the grid to DateSpan. Me.C1TrueDBGrid1.Columns("NextMeeting").GroupInfo.Interval = C1.Win.C1TrueDBGrid.GroupIntervalEnum.DateSpan

    To write code in C#

    C#	Copy Code
    // Set the GroupInfo.Interval of the grid to DateSpan. this.c1TrueDBGrid1.Columns["NextMeeting"].GroupInfo.Interval = C1.Win.C1TrueDBGrid.GroupIntervalEnum.DateSpan;

11. Finally, to keep the NextMeeting column visible after grouping by it, set the ColumnVisible property to True.

    In the Designer

    Locate the ColumnVisible property in the left pane of the C1TrueDBGrid Designer and set it to True.

    
    

    In Code

    Add the following code to the Form_Load event:

    To write code in Visual Basic

    Visual Basic	Copy Code
    ' Keep the NextMeeting column visible while grouping. Me.C1TrueDBGrid1.Columns("NextMeeting").GroupInfo.ColumnVisible = True

    To write code in C#

    C#	Copy Code
    // Keep the NextMeeting column visible while grouping. this.c1TrueDBGrid1.Columns["NextMeeting"].GroupInfo.ColumnVisible = true;

In this example, the NextMeeting column is sorted by date values.