Spread for ASP.NET 8.0 Product Documentation
CanUpdate Property
Example 


Gets whether the data source can update; this implementation always returns false.
Syntax
'Declaration
 
Public Overrides ReadOnly Property CanUpdate As Boolean
'Usage
 
Dim instance As SpreadDataSourceView
Dim value As Boolean
 
value = instance.CanUpdate
public override bool CanUpdate {get;}

Property Value

Boolean: true if can update; false otherwise; always returns false
Example

This example binds a cell range and uses many methods of the SpreadDataSource and SpreadDataSourceView classes.

FpSpread1.Sheets[0].ColumnHeader.Cells[0, 0].Value = "UserName";
FpSpread1.Sheets[0].Cells[0, 0].Value = "Test";
FpSpread1.Sheets[0].Cells[1, 0].Value = "Ann";
FpSpread1.Sheets[0].Cells[2, 0].Value = "Doug";
FarPoint.Web.Spread.SpreadDataSource spreadDS = new FarPoint.Web.Spread.SpreadDataSource();
spreadDS.SheetName = FpSpread1.ActiveSheetView.SheetName;
spreadDS.SpreadID = "FpSpread1";//FpSpread1.ID;
spreadDS.CellRange = new FarPoint.Web.Spread.Model.CellRange(0, 0, 3, 1);

//Add the Spread data source to the page
this.Controls.Add(spreadDS);

// GetData() method
System.Collections.IEnumerable enmrable;
System.Collections.IEnumerator enmr;
enmrable = spreadDS.GetData();                       
enmr = enmrable.GetEnumerator();
ListBox1.DataTextField = "UserName";
while (enmr.MoveNext()) 
   { 
    ListBox1.Items.Add(Convert.ToString(enmr.Current)); 
    }
       
// GetViewNames() method
System.Collections.ICollection c;
c = spreadDS.GetViewNames();        
string[] arr= new string[2];
c.CopyTo(arr, 0);
ListBox1.Items.Add(c.Count.ToString());
if (arr[0] == "") 
   {
    ListBox1.Items.Add("return correct value");
   }
       
// GetView() method
System.Web.UI.DataSourceView DSView;              
DSView = spreadDS.GetView(arr[0]);        
ListBox1.Items.Add(DSView.CanDelete.ToString());
ListBox1.Items.Add(DSView.CanInsert.ToString());
ListBox1.Items.Add(DSView.CanUpdate.ToString());
ListBox1.Items.Add(DSView.CanSort.ToString());
FpSpread1.Sheets(0).ColumnHeader.Cells(0, 0).value = "UserName"
FpSpread1.Sheets(0).Cells(0, 0).Value = "Test"
FpSpread1.Sheets(0).Cells(1, 0).Value = "Ann"
FpSpread1.Sheets(0).Cells(2, 0).Value = "Doug"

Dim spreadDS As New FarPoint.Web.Spread.SpreadDataSource()
spreadDS.SheetName = FpSpread1.ActiveSheetView.SheetName
spreadDS.SpreadID = "FpSpread1"
spreadDS.CellRange = New FarPoint.Web.Spread.Model.CellRange(0, 0, 3, 1)

'Add the Spread Data Source to the page
Controls.Add(spreadDS)

Dim spreadDSV = New FarPoint.Web.Spread.SpreadDataSourceView(spreadDS)
ListBox1.Items.Add(spreadDSV.CanDelete.ToString())
ListBox1.Items.Add(spreadDSV.CanInsert.ToString())
ListBox1.Items.Add(spreadDSV.CanUpdate.ToString())
ListBox1.Items.Add(spreadDSV.CanSort.ToString())

' for GetData() method
Dim enmrable As System.Collections.IEnumerable
Dim enmr As System.Collections.IEnumerator
enmrable = spreadDS.GetData()
enmr = enmrable.GetEnumerator()
ListBox1.DataTextField = "UserName"
While enmr.MoveNext()
   ListBox1.Items.Add(Convert.ToString(enmr.Current))
End While

' for GetViewNames() method
Dim c As System.Collections.ICollection
c = spreadDS.GetViewNames()
 Dim arr(2) As String
c.CopyTo(arr, 0)
ListBox1.Items.Add(c.Count.ToString())
If arr(0) = "" Then
   ListBox1.Items.Add("return correct value")
End If

' for GetView() method
Dim DSView As System.Web.UI.DataSourceView
DSView = spreadDS.GetView(arr(0))
ListBox1.Items.Add(DSView.CanDelete.ToString())
ListBox1.Items.Add(DSView.CanInsert.ToString())
ListBox1.Items.Add(DSView.CanUpdate.ToString())
ListBox1.Items.Add(DSView.CanSort.ToString())
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

See Also

Reference

SpreadDataSourceView Class
SpreadDataSourceView Members

 

 


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