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Devart.Data.MySql Namespace / MySqlBlob Class / IsEmpty Property
Example

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    IsEmpty Property (MySqlBlob)
    In This Topic
    Gets a value indicating whether the MySqlBlob is empty or not.
    Syntax
    'Declaration
     
    Public ReadOnly Property IsEmpty As Boolean
    public bool IsEmpty {get;}

    Property Value

    true if the MySqlBlob is empty; otherwise, false.
    Remarks
    IsEmpty is true also if MySqlBlob has Null value.
    Example
    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
    Requirements

    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

    See Also