DBProviderInfo.SupportsNullColumns Proprietà

public:
 property bool SupportsNullColumns { bool get(); };

public bool SupportsNullColumns { get; }

member this.SupportsNullColumns : bool

Public ReadOnly Property SupportsNullColumns As Boolean

Valore della proprietà

Un booleano che indica se la tabella supporta colonne nulle. Un valore di vero indica che sono supportate colonne nulle.

Esempio

Il seguente esempio elenca le proprietà dei fornitori di database disponibili sul computer.

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  

Output di esempio:

Descrizione = MediaCatalogDB OLE DB Provider, Nome = MediaCatalogDB OLE DB Provider, ParseName = {09E767A6-4481-4791-86A5-A739E5290E4C}

ProviderSubType =None, ProviderType = OleDb

SupportsNullColumns = True, UseFullTableName = True

Description = Microsoft OLE DB Provider for SQL Server, Name = SQLOLEDB, ParseName = {0C7FF16C-38E3-11d0-97AB-00C04FC2AD98}

ProviderSubType =SqlServer, ProviderType = OleDb

SupportsNullColumns = True, UseFullTableName = True