从SQL Server中检索varbinary(MAX)到C#中的byte []

Question

我试图varbinary(MAX)从SQL Server到byte[]C#中的变量.

我怎样才能做到这一点？

谢谢

Answer 1

private static byte[] getDocument(int documentId)
{
    using (SqlConnection cn = new SqlConnection("..."))
    using (SqlCommand cm = cn.CreateCommand())
    {
        cm.CommandText = @"
            SELECT DocumentData
            FROM   Document
            WHERE  DocumentId = @Id";
        cm.Parameters.AddWithValue("@Id", documentId);
        cn.Open();
        return cm.ExecuteScalar() as byte[];
    }
}