DBProviderInfo.SupportsNullColumns Propiedad
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Devuelve un valor booleano que indica si la tabla admite columnas NULL. Este campo es de solo lectura.
public:
property bool SupportsNullColumns { bool get(); };public bool SupportsNullColumns { get; }member this.SupportsNullColumns : boolPublic ReadOnly Property SupportsNullColumns As BooleanValor de propiedad
Valor booleano que indica si la tabla admite columnas null. Un valor true indica que se admiten columnas null.
Ejemplos
En el ejemplo siguiente se enumeran las propiedades de los proveedores de base de datos disponibles en el equipo.
namespace dbproviderinfo
{
class Program
{
static void Main(string[] args)
{
Application app = new Application();
DBProviderInfos dbis = app.DBProviderInfos;
foreach (DBProviderInfo dbi in dbis)
{
Console.WriteLine("Description = {0}, Name = {1}, ParseName = {2}", dbi.Description, dbi.Name, dbi.ParseName);
Console.WriteLine("ProviderSubType ={0}, ProviderType = {1}", dbi.ProviderSubType, dbi.ProviderType);
Console.WriteLine("SupportsNullColumns = {0}, UseFullTableName = {1}", dbi.SupportsNullColumns, dbi.UseFullTableName);
}
}
}
}
Namespace dbproviderinfo
Class Program
Shared Sub Main(ByVal args() As String)
Dim app As Application = New Application()
Dim dbis As DBProviderInfos = app.DBProviderInfos
Dim dbi As DBProviderInfo
For Each dbi In dbis
Console.WriteLine("Description = {0}, Name = {1}, ParseName = {2}", dbi.Description, dbi.Name, dbi.ParseName)
Console.WriteLine("ProviderSubType ={0}, ProviderType = {1}", dbi.ProviderSubType, dbi.ProviderType)
Console.WriteLine("SupportsNullColumns = {0}, UseFullTableName = {1}", dbi.SupportsNullColumns, dbi.UseFullTableName)
Next
End Sub
End Class
End Namespace
Salida de ejemplo:
Description = MediaCatalogDB OLE DB Provider, Name = MediaCatalogDB OLE DB Provider, ParseName = {09E767A6-4481-4791-86A5-A739E5290E4C}
ProviderSubType =None, ProviderType = OleDb
SupportsNullColumns = True, UseFullTableName = True
Descripción = Proveedor OLE DB de Microsoft para SQL Server, Nombre = SQLOLEDB, ParseName = {0C7FF16C-38E3-11d0-97AB-00C04FC2AD98}
ProviderSubType =SqlServer, ProviderType = OleDb
SupportsNullColumns = True, UseFullTableName = True