ApplicationFactory.HasVstoObject Method (ListObject)
Returns a value that indicates whether a Microsoft.Office.Tools.Excel.ListObject exists for the specified native list object.
Namespace: Microsoft.Office.Tools.Excel
Assembly: Microsoft.Office.Tools.Excel (in Microsoft.Office.Tools.Excel.dll)
Syntax
'Declaration
Function HasVstoObject ( _
listObject As ListObject _
) As Boolean
bool HasVstoObject(
ListObject listObject
)
Parameters
- listObject
Type: Microsoft.Office.Interop.Excel.ListObject
The native Excel list object to test.
Return Value
Type: System.Boolean
true if a Microsoft.Office.Tools.Excel.ListObject exists for the specified Microsoft.Office.Interop.Excel.ListObject object; otherwise, false.
Examples
The following code example checks each native list object in a worksheet to determine if the list object has an associated host item. To use this code, run it from the ThisAddIn class in an Excel add-in project that targets the .NET Framework 4.
Dim mySheet As Excel.Worksheet = Me.Application.ActiveSheet
If mySheet.ListObjects.Count > 0 Then
For Each list As Excel.ListObject In mySheet.ListObjects
If Globals.Factory.HasVstoObject(list) = True Then
System.Windows.Forms.MessageBox.Show( _
"The VSTO properties of list objects are not " _
+ "persisted when you save and close this workbook.", _
"VSTO ListObject", _
System.Windows.Forms.MessageBoxButtons.OK, _
System.Windows.Forms.MessageBoxIcon.Warning)
Exit For
End If
Next
End If
Excel.Worksheet mySheet = (Excel.Worksheet)
this.Application.Worksheets["Sheet1"];
if (mySheet.ListObjects.Count > 0)
{
foreach (Excel.ListObject list in mySheet.ListObjects)
{
if (Globals.Factory.HasVstoObject(list) == true)
{
System.Windows.Forms.MessageBox.Show(
"The VSTO properties of list objects are not "
+ "persisted when you save and close this workbook.",
"VSTO ListObject",
System.Windows.Forms.MessageBoxButtons.OK,
System.Windows.Forms.MessageBoxIcon.Warning);
break;
}
}
}
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.