AllowLoadOnDemand Property (FpSpread)

Gets or sets whether to allow incremental loads to the client on demand when the user is scrolling.

Syntax

Visual Basic
C#

'Declaration
 
Public Property AllowLoadOnDemand As Boolean

'Usage
 
Dim instance As FpSpread
Dim value As Boolean
 
instance.AllowLoadOnDemand = value
 
value = instance.AllowLoadOnDemand

public bool AllowLoadOnDemand {get; set;}

Property Value

Boolean: true to allow load-on-demand paging; false otherwise

Example

This example allows the loading of a specified number of rows.

protected void PageLoad(object sender, EventArgs e)
{
    string conStr = "Provider=Microsoft.JET.OLEDB.4.0;data source= c:\\nwind.mdb";
    string sqlStr = "SELECT * FROM Orders";
    System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection(conStr);
    System.Data.DataSet ds = new System.Data.DataSet();
    System.Data.OleDb.OleDbDataAdapter daCust = new System.Data.OleDb.OleDbDataAdapter(sqlStr, conn);
    daCust.Fill(ds);
    FpSpread1.ActiveSheetView.DataSource = ds;
    
    FpSpread1.ActiveSheetView.PageSize = 200; 
    FpSpread1.AllowLoadOnDemand = true; 
    FpSpread1.LoadInitRowCount = 15; 
    FpSpread1.LoadRowIncrement = 5;
    FpSpread1.ActiveSheetView.AllowPage = false; 
}

 protected void FpSpread1SaveOrLoadSheetState(object sender, FarPoint.Web.Spread.SheetViewStateEventArgs e)
 {
    if (e.IsSave) 
    { 
            Session["sheet1"] = e.SheetView.SaveViewState(); 
    } 
    else 
    { 
            e.SheetView.LoadViewState(Session["sheet1"]); 
    } 
    e.Handled = true;
}

Visual Basic

Protected Sub PageLoad(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim conStr As String = "Provider=Microsoft.JET.OLEDB.4.0;data source= c:\nwind.mdb"
Dim sqlStr As String = "SELECT * FROM Customers"
Dim conn As System.Data.OleDb.OleDbConnection = New System.Data.OleDb.OleDbConnection(conStr)
Dim ds As Data.DataSet = New Data.DataSet
Dim daCust As System.Data.OleDb.OleDbDataAdapter = New System.Data.OleDb.OleDbDataAdapter(sqlStr, conn)
daCust.Fill(ds)
FpSpread1.ActiveSheetView.DataSource = ds

FpSpread1.ActiveSheetView.PageSize = 15
FpSpread1.AllowLoadOnDemand = True
FpSpread1.LoadInitRowCount = 15
FpSpread1.LoadRowIncrement = 5
FpSpread1.ActiveSheetView.AllowPage = False

End Sub

Protected Sub FpSpread1SaveOrLoadSheetState(ByVal sender As Object, ByVal e As FarPoint.Web.Spread.SheetViewStateEventArgs)
Handles FpSpread1.SaveOrLoadSheetState
If e.IsSave Then

Session("sheet1") = e.SheetView.SaveViewState()

    Else

        e.SheetView.LoadViewState(Session("sheet1"))

    End If

    e.Handled = True


End Sub

Requirements

Target Platforms: Windows 7, Windows 8, Windows Vista, Windows Server 2000, Windows 2000 Professional, Windows XP Professional, Windows NT 4.0 Workstation, SP6, Windows NT 4.0 Server, SP6

Reference

FpSpread Class
FpSpread Members

User-Task Documentation

Allowing Load on Demand