IsValid Method (IEditor)

Determines whether the specified value is valid.

Syntax

Visual Basic
C#

'Declaration
 
Function IsValid( _
   ByVal value As Object _
) As Boolean

'Usage
 
Dim instance As IEditor
Dim value As Object
Dim value As Boolean
 
value = instance.IsValid(value)

bool IsValid( 
   object value
)

Parameters

value: Specified value of the editor control

Return Value

Boolean: true if value in entry is valid; false otherwise

Example

This example subclasses the IEditor class and uses a check box as the cell editor to illustrate the use of the methods and events.

public static CheckBox ck = new CheckBox();

class myEditor : FarPoint.Win.Spread.CellType.IEditor
{
     public event EventHandler EditingCanceled;
     public event EventHandler EditingStopped;
     public bool StopEditing()
     {
          if (EditingStopped != null)
          {
               EditingStopped(ck, EventArgs.Empty);
               base.FireEditingStopped();
               return true;
          }
          else
          {
               return false;
          }
     }

     public void CancelEditing()
     {
          EditingCanceled(ck, EventArgs.Empty);
          base.FireEditingCanceled();
     }
     
     public bool IsReservedKey(KeyEventArgs e)
     {
          return false;
     }
          
     public bool IsValid(Object value)
     {
          return true;
     }
     
     public Size GetPreferredSize(System.Windows.Forms.Control editor)
     {
          return editor.Size;
     }

     public Cursor GetReservedCursor(object o)
     {
          return null;
     }

     public Control GetEditorControl(FarPoint.Win.Spread.Appearance appr, float zoom)
     {
          return ck;
     }

     public object GetEditorValue()
     {
          return ck.CheckState;
     }

     public void SetEditorValue(object value)
     {
     }

     public object IsReservedLocation(Graphics g, int x, int y, Rectangle r, FarPoint.Win.Spread.Appearance appr, object value,
float zoom)
     {
          return null;
     }

     public void StartEditing(EventArgs e, bool selectAll)
     {
          selectAll = true;
     }

     public void ShowSubEditor()
     {
     this.ShowSubEditor();
     }
}

private void Form1_Load(object sender, System.EventArgs e)
{
     fpSpread1.ActiveSheet.Cells[0, 0].Editor = new myEditor();
}

Visual Basic

Shared ck As New CheckBox()

Public Class myEditor
Implements FarPoint.Win.Spread.CellType.IEditor

     Public Event EditingStopped(ByVal sender As Object, ByVal e As EventArgs) Implements FarPoint.Win.Spread.CellType.IEditor.EditingStopped

     Public Event EditingCancelled(ByVal sender As Object, ByVal e As EventArgs) Implements FarPoint.Win.Spread.CellType.IEditor.EditingCanceled

     Public Function StopEditing() As Boolean Implements FarPoint.Win.Spread.CellType.IEditor.StopEditing
          RaiseEvent EditingStopped(ck, EventArgs.Empty)
          MyBase.FireEditingStopped()
          Return True
     End Function

     Public Sub CancelEditing() Implements FarPoint.Win.Spread.CellType.IEditor.CancelEditing
          RaiseEvent EditingCancelled(ck, EventArgs.Empty)
          MyBase.FireEditingCanceled()
     End Sub

     Public Function IsReservedKey(ByVal e As KeyEventArgs) As Boolean Implements FarPoint.Win.Spread.CellType.IEditor.IsReservedKey
          Return False
     End Function

     Public Function IsValid(ByVal value As Object) As Boolean Implements FarPoint.Win.Spread.CellType.IEditor.IsValid
          Return True
     End Function

     Public Function GetReservedCursor(ByVal o As Object) As Cursor Implements FarPoint.Win.Spread.CellType.IEditor.GetReservedCursor
          Return Nothing
     End Function

     Public Function GetEditorControl(ByVal appr As FarPoint.Win.Spread.Appearance, ByVal zoom As Single) As Control Implements
FarPoint.Win.Spread.CellType.IEditor.GetEditorControl
          Return ck
     End Function

     Public Function GetEditorValue() As Object Implements FarPoint.Win.Spread.CellType.IEditor.GetEditorValue
          Return ck.CheckState
     End Function

     Public Function GetPreferredSize(ByVal editor As System.Windows.Forms.Control) As Size Implements FarPoint.Win.Spread.CellType.IEditor.GetPreferredSize
          Return editor.Size
     End Function

     Public Sub SetEditorValue(ByVal value As Object) Implements FarPoint.Win.Spread.CellType.IEditor.SetEditorValue
          ck.CheckState = CheckState.Checked
     End Sub

     Public Function IsReservedLocation(ByVal g As Graphics, ByVal x As Integer, ByVal y As Integer, ByVal r As Rectangle,
ByVal appr As FarPoint.Win.Spread.Appearance, ByVal value As Object, ByVal zoom As Single) As Object Implements FarPoint.Win.Spread.CellType.IEditor.IsReservedLocation
          Return Nothing
     End Function

     Public Sub StartEditing(ByVal e As EventArgs, ByVal selectAll As Boolean) Implements FarPoint.Win.Spread.CellType.IEditor.StartEditing
               selectAll = True
     End Sub

     Public Sub ShowSubEditor() Implements FarPoint.Win.Spread.CellType.IEditor.ShowSubEditor
               Me.ShowSubEditor()
     End Sub
End Class

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
     FpSpread1.ActiveSheet.Cells(0, 0).Editor = New myEditor()
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

Reference

IEditor Interface
IEditor Members