In this sample a
Null value is assigned to a MySqlBlob instance, then some properties are checked. If unchanged, this code produces the following output:
It is empty.
It is Null.
public void MySqlBlobNullTest()
{
MySqlBlob myBlob = new MySqlBlob();
myBlob = MySqlBlob.Null;
if (myBlob.CanRead)
{
Console.WriteLine("It can read.");
}
if (myBlob.CanWrite)
{
Console.WriteLine("It can write.");
}
if (myBlob.CanSeek)
{
Console.WriteLine("It can seek.");
}
if (myBlob.IsEmpty)
{
Console.WriteLine("It is empty.");
}
if (myBlob.IsNull)
{
Console.WriteLine("It is Null.");
}
}
Public Sub MySqlBlobNullTest()
Dim myBlob As MySqlBlob = New MySqlBlob
myBlob = MySqlBlob.Null
If myBlob.CanRead Then
Console.WriteLine("It can read.")
End If
If myBlob.CanWrite Then
Console.WriteLine("It can write.")
End If
If (myBlob.CanSeek) Then
Console.WriteLine("It can seek.")
End If
If myBlob.IsEmpty Then
Console.WriteLine("It is empty.")
End If
If myBlob.IsNull Then
Console.WriteLine("It is Null.")
End If
End Sub
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2