Spread Windows Forms 10.0 Product Documentation
Expand Event
Example 


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
Cancel (Inherited from System.ComponentModel.CancelEventArgs)
ExpandGets whether the row is going to be expanded.  
RowGets the row to expand or collapse.  
ViewGets 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
Requirements

Target Platforms: Windows 2000 Professional (SP4), Windows 2000 Server, Windows 2003 Server (SP1), Windows Server 2012 R2, Windows 2008, Windows XP (SP2), Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10

See Also

Reference

FpSpread Class
FpSpread Members
ExpandEventArgs Class

 

 


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