UseRowIndex Property (DefaultSheetDataModel)

In This Topic

Gets whether the GetKey method generates a key for a row.

Syntax

Visual Basic
C#

'Declaration
 
Public ReadOnly Property UseRowIndex As Boolean

'Usage
 
Dim instance As DefaultSheetDataModel
Dim value As Boolean
 
value = instance.UseRowIndex

public bool UseRowIndex {get;}

Property Value

Boolean: true if the GetKey method takes the row index as the parameter; false if the GetKey method takes the column index as parameter

Remarks

This property is true if the GetKey method generates a key for the specified row and false if the GetKey method generates a key for the specified column.

Example

This example displays a list of products in the spread. The GetKey method returns the name of the product.

Visual Basic

<Serializable()>_
PublicClassOrderItem
Dim id As Integer
Dim qty As Integer
Dim oname As String
Dim oprice As Double

Public Sub New(ByVal productID As Integer,ByVal name As String,ByVal price As Double,ByVal quantity As Integer)
Me.id=productID
Me.qty=quantity
Me.oname=name
Me.oprice=price
EndSub

Public ReadOnly Property ProductID() As Integer
Get
Return id
End Get
End Property

Public Property Quantity() As Integer
Get
Return qty
End Get
Set(ByVal Value As Integer)
qty=Value
End Set
End Property

Public ReadOnly Property Name() As String
Get
Return oname
End Get
End Property

Public ReadOnly Property Price() As Double
Get
Return oprice
End Get
End Property
End Class

<Serializable()>_
PublicClassOrderList
Inherits FarPoint.Web.Spread.Model.BaseSheetDataModel
Implements FarPoint.Web.Spread.Model.IDataSourceSupport

Private orders As ArrayList = New ArrayList()

Public ReadOnly Property UseRowIndex() As Boolean Implements FarPoint.Web.Spread.Model.IDataSourceSupport.UseRowIndex
Get
Return False
End Get
End Property

Public Function GetKey(ByVal index As Integer) As Object Implements FarPoint.Web.Spread.Model.IDataSourceSupport.GetKey
Dim oi As OrderItem=orders(index)
Return oi.Name
End Function

Public Overrides Property RowCount() As Integer
Get
Return 3
End Get
Set(ByVal Value As Integer)

End Set
End Property

Public Overrides Property ColumnCount() As Integer
Get
Return orders.Count
End Get
Set(ByVal Value As Integer)

End Set
End Property

Public Overrides Function GetValue(ByVal r As Integer,ByVal c As Integer)As Object
If(r=0)Then
Dim oi As OrderItem=orders(c)
Return oi.Quantity
ElseIf(r=1)Then
Dim oi As OrderItem=orders(c)
Return oi.name
ElseIf(r=2)Then
Dim oi As OrderItem=orders(c)
Return oi.price
End If
Return""
End Function

Public Function GetColumnName(ByVal col As Integer)As String
Return Nothing
End Function

Public ReadOnly Property Item(ByVal name As String)
Get

Dim elems As IEnumerator=orders.GetEnumerator()
While(elems.MoveNext())
Dim e As OrderItem=elems.Current
If(e.Name=name)Then
Return Item
End If
End While
Return Nothing
End Get
End Property

Public Sub Add(ByVal value As OrderItem)
If(Me.Item(value.Name)=Nothing)Then
orders.Add(value)
Else
Dim oI As OrderItem=Me.Item(value.Name)
oI.Quantity=oI.Quantity+1
End If
End Sub

Public Sub ClearCart()
orders.Clear()
End Sub

Public Property DataSource() As Object Implements FarPoint.Web.Spread.Model.IDataSourceSupport.DataSource
Get
Return Nothing
End Get
Set(ByVal Value As Object)
End Set
End Property

Public Property DataMember() As String Implements FarPoint.Web.Spread.Model.IDataSourceSupport.DataMember
Get
Return Nothing
End Get
Set(ByVal Value As String)

End Set
End Property

Public Property DataKeyField() As Object Implements FarPoint.Web.Spread.Model.IDataSourceSupport.DataKeyField
Get
Return Nothing
End Get
Set(ByVal Value As Object)

End Set
End Property

Public Function GetDataColumnName(ByVal column As Integer)As String Implements FarPoint.Web.Spread.Model.IDataSourceSupport.GetDataColumnName
Return String.Empty
End Function
Public Property ParentRowIndex() As Integer Implements FarPoint.Web.Spread.Model.IDataSourceSupport.ParentRowIndex
Get
Return 0
End Get
Set(ByVal Value As Integer)

End Set
End Property

Public Property ParentRelationName() As String Implements FarPoint.Web.Spread.Model.IDataSourceSupport.ParentRelationName
Get
Return Nothing
End Get
Set(ByVal Value As String)

End Set
End Property

Public ReadOnly Property ChildRelationCount() As Integer Implements FarPoint.Web.Spread.Model.IDataSourceSupport.ChildRelationCount
Get
Return 0
End Get
End Property

Public Property Parent() As FarPoint.Web.Spread.Model.IDataSourceSupport Implements FarPoint.Web.Spread.Model.IDataSourceSupport.Parent
Get
Return Nothing
End Get
Set(ByVal Value As FarPoint.Web.Spread.Model.IDataSourceSupport)

End Set
End Property

Public Function GetChildRelation(ByVal index As Integer)As String Implements FarPoint.Web.Spread.Model.IDataSourceSupport.GetChildRelation
Return Nothing
End Function

Public Function GetDataView(ByVal create As Boolean)As DataView Implements FarPoint.Web.Spread.Model.IDataSourceSupport.GetDataView
Return Nothing
End Function

Public Sub SetModelDataColumn(ByVal column As Integer,ByVal name As String)Implements FarPoint.Web.Spread.Model.IDataSourceSupport.SetModelDataColumn
End Sub

Public Function GetDataRowFromModelRow(ByVal row As Integer)As Integer Implements FarPoint.Web.Spread.Model.IDataSourceSupport.GetDataRowFromModelRow
Return 0
End Function

Public Function GetModelRowFromDataRow(ByVal row As Integer)As Integer Implements FarPoint.Web.Spread.Model.IDataSourceSupport.GetModelRowFromDataRow
Return 0
End Function

Public Function GetDataColumnFromModelColumn(ByVal column As Integer)As Integer Implements FarPoint.Web.Spread.Model.IDataSourceSupport.GetDataColumnFromModelColumn
Return 0
End Function

Public Function GetModelColumnFromDataColumn(ByVal column As Integer)As Integer Implements FarPoint.Web.Spread.Model.IDataSourceSupport.GetModelColumnFromDataColumn
Return 0
End Function

Public Function IsColumnBound(ByVal column As Integer)As Boolean Implements FarPoint.Web.Spread.Model.IDataSourceSupport.IsColumnBound
Return False
End Function

Public Property AutoGenerateColumns()As Boolean Implements FarPoint.Web.Spread.Model.IDataSourceSupport.AutoGenerateColumns
Get
Return False
End Get
Set(ByVal Value As Boolean)

End Set
End Property

Public Function IsColumnBound(ByVal row As Integer,ByVal relation As String)As Boolean
Return Nothing
End Function

Public Function GetChildDataModel(ByVal row As Integer,ByVal relation As String)As FarPoint.Web.Spread.Model.ISheetDataModel Implements FarPoint.Web.Spread.Model.IDataSourceSupport.GetChildDataModel
Return Nothing
End Function

End Class

Private Sub Page_Load(ByVal sender As System.Object,ByVal e As System.EventArgs)Handles MyBase.Load

If(Me.IsPostBack)Then Return

Dim Data As OrderList = New OrderList()
Data.Add(New OrderItem(1,"P1",10.0,10))
Data.Add(New OrderItem(2,"P2",20.0,5))
Data.Add(New OrderItem(3,"P3",30.0,1))

FpSpread1.ActiveSheetView.DataModel=Data
ListBox1.Items.Add(Data.GetKey(1).ToString())

EndSub

[Serializable()]
public class OrderItem
{
public int productID;
public int quantity;
public String name;
public double price;

public OrderItem(int productID,String names,double price,int quantity)
{
this.productID=productID;
this.quantity=quantity;
this.name=name;
this.price=price;
}

public int ProductID
{
get{return productID;}
}

public int Quantity
{
get{return quantity;}
set{quantity=value;}
}

public String Name
{
get{return name;}
}

public double Price
{
get{return price;}
}
}

[Serializable()]
public class OrderList:FarPoint.Web.Spread.Model.BaseSheetDataModel,FarPoint.Web.Spread.Model.IDataSourceSupport
{
private ArrayList orders=new ArrayList();

public bool UseRowIndex
{
get{return false;}
}

public object GetKey(int index)
{
OrderItem oi=(OrderItem)orders[index];
return oi.Name;
}

public override int RowCount
{
get{return 3;}
}

public override int ColumnCount
{
get{return orders.Count;}
}

public override object GetValue(int r,int c)
{
switch(r)
{
case0:
//Qty
OrderItem oi=(OrderItem)orders[c];
return oi.Quantity;
case1:
//Name
oi=(OrderItem)orders[c];
return oi.Name;
case2:
//Price
oi=(OrderItem)orders[c];
return oi.Price;
}

return"";
}

public string GetColumnName(int col)
{
return null;
}

public OrderItem this[String name]
{
get
{
IEnumerator items=orders.GetEnumerator();
while(items.MoveNext())
{
OrderItem item=(OrderItem)items.Current;
if(item.Name==name)return item;
}

return null;
}
}

public void Add(OrderItem value)
{
if(this[value.Name]==null)
{
orders.Add(value);
}
else
{
OrderItem oI=(OrderItem)this[value.Name];
oI.Quantity=oI.Quantity+1;
}
}

public void ClearCart()
{
orders.Clear();
}

public object DataSource
{
get
{
return null;
}
set{}
}
public string DataMember
{
get
{
return null;
}
set{}
}
public object DataKeyField
{
get
{
return null;
}
set{}
}
public string GetDataColumnName(int column){return null;}
public int ParentRowIndex
{
get
{
return 0;
}
set{}
}
public string ParentRelationName
{
get
{
return null;
}
set{}
}
public int ChildRelationCount{get{return 0;}}
public FarPoint.Web.Spread.Model.IDataSourceSupportParent
{
get
{
return null;
}
set{}
}
public stringGetChildRelation(int index){return null;}
public DataViewGetDataView(bool create){return null;}
public void SetModelDataColumn(int column,string columnName){}
public int GetDataRowFromModelRow(int row){return-1;}
public int GetModelRowFromDataRow(int row){return-1;}
public int GetDataColumnFromModelColumn(int column){return-1;}
public int GetModelColumnFromDataColumn(int column){return-1;}
public bool IsColumnBound(int column){return false;}
public bool AutoGenerateColumns{get{return false;}set{}}
public FarPoint.Web.Spread.Model.ISheetDataModelGetChildDataModel(int row,string relation){return null;}
}

private void Page_Load(object sender, System.EventArgs e)
{
if(this.IsPostBack)return;

OrderListdata=new OrderList();
data.Add(new OrderItem(1,"P1",10.0,10));
data.Add(new OrderItem(2,"P2",20.0,5));
data.Add(new OrderItem(3,"P3",30.0,1));

FpSpread1.ActiveSheetView.DataModel=data;
ListBox1.Items.Add(data.GetKey(1).ToString());
}

Reference

DefaultSheetDataModel Class
DefaultSheetDataModel Members
GetKey Method

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