Spread Windows Forms 13.0 Product Documentation
FarPoint.Win.Spread Assembly / FarPoint.Win.Spread Namespace / FpSpread Class / Expand Event
Example


In This Topic
    Expand Event
    In This Topic
    Occurs when a row is expanded or collapsed.
    Syntax
    'Declaration
     
    Public Event Expand As ExpandEventHandler
    'Usage
     
    Dim instance As FpSpread
    Dim handler As ExpandEventHandler
     
    AddHandler instance.Expand, handler
    public event ExpandEventHandler Expand
    Event Data

    The event handler receives an argument of type ExpandEventArgs containing data related to this event. The following ExpandEventArgs properties provide information specific to this event.

    PropertyDescription
    (Inherited from System.ComponentModel.CancelEventArgs)
    Gets whether the row is going to be expanded.  
    Gets the row to expand or collapse.  
    Gets the view that contains the row to be expanded or collapsed.  
    Remarks

    This event is raised by the OnExpand method when a row is expanded or collapsed.

    For more details on the individual event arguments, refer to ExpandEventArgs members.

    Example
    This example raises the Expand event when a row is expanded or collapsed.
    System.Data.DataSet ds = new System.Data.DataSet();
    DataTable name; 
    DataTable city; 
    name = ds.Tables.Add("Customers"); 
    name.Columns.AddRange(new DataColumn[] {new DataColumn("LastName", typeof(string)), new DataColumn("FirstName", typeof(string)),
    new DataColumn("ID", typeof(Int32))}); 
    name.Rows.Add(new object[] {"Fielding", "William", 0}); 
    name.Rows.Add(new object[] {"Williams", "Arthur", 1}); 
    name.Rows.Add(new object[] {"Zuchini", "Theodore", 2}); 
    city = ds.Tables.Add("City/State"); 
    city.Columns.AddRange(new DataColumn[] {new DataColumn("City", typeof(string)), new DataColumn("Owner", typeof(Int32)), new
    DataColumn("State", typeof(string))}); 
    city.Rows.Add(new object[] {"Atlanta", 0, "Georgia"}); 
    city.Rows.Add(new object[] {"Boston", 1, "Mass."}); 
    city.Rows.Add(new object[] {"Tampa", 2, "Fla."}); 
    ds.Relations.Add("City/State", name.Columns["ID"], city.Columns["Owner"]); 
    fpSpread1.DataSource = ds;
    fpSpread1.DataMember = "Customers";
    Label1.Text = "Click on one of the + next to a row to fire the event";
    
    private void fpSpread1_Expand(object sender, FarPoint.Win.Spread.ExpandEventArgs e)
    {
         ListBox1.Items.Add("Expand event fired!");
    }
    Dim ds As New System.Data.DataSet()
    Dim name As DataTable
    Dim city As DataTable
    name = ds.Tables.Add("Customers")
    name.Columns.AddRange(New DataColumn() {New DataColumn("LastName", Type.GetType("System.String")), New DataColumn("FirstName",
    Type.GetType("System.String")), New DataColumn("ID", Type.GetType("System.Int32"))})
    name.Rows.Add(New Object() {"Fielding", "William", 0})
    name.Rows.Add(New Object() {"Williams", "Arthur", 1})
    name.Rows.Add(New Object() {"Zuchini", "Theodore", 2})
    city = ds.Tables.Add("City/State")
    city.Columns.AddRange(New DataColumn() {New DataColumn("City", Type.GetType("System.String")), New DataColumn("Owner", Type.GetType("System.Int32")),
    New DataColumn("State", Type.GetType("System.String"))})
    city.Rows.Add(New Object() {"Atlanta", 0, "Georgia"})
    city.Rows.Add(New Object() {"Boston", 1, "Mass."})
    city.Rows.Add(New Object() {"Tampa", 2, "Fla."})
    ds.Relations.Add("City/State", name.Columns("ID"), city.Columns("Owner"))
    FpSpread1.DataSource = ds
    FpSpread1.DataMember = "Customers"
    Label1.Text = "Click on one of the + next to a row to fire the event"
    
    Private Sub FpSpread1_Expand(ByVal sender As Object, ByVal e As FarPoint.Win.Spread.ExpandEventArgs) Handles FpSpread1.Expand
         ListBox1.Items.Add("Expand event fired!")
    End Sub
    
    See Also