Add MySqlCommand.IsPrepared.

Author: bgrainger

src/MySqlConnector/MySql.Data.MySqlClient/MySqlCommand.cs

@@ -154,10 +154,12 @@ public override string CommandText
 				if (m_connection?.HasActiveReader ?? false)
 					throw new InvalidOperationException("Cannot set MySqlCommand.CommandText when there is an open DataReader for this command; it must be closed first.");
 				m_commandText = value;
-				m_statements = null;
+				ClearPreparedStatements();
 			}
 		}
 
+		public bool IsPrepared => m_statements != null;
+
 		public new MySqlTransaction Transaction { get; set; }
 
 		public new MySqlConnection Connection
@@ -168,6 +170,7 @@ public override string CommandText
 				if (m_connection?.HasActiveReader ?? false)
 					throw new InvalidOperationException("Cannot set MySqlCommand.Connection when there is an open DataReader for this command; it must be closed first.");
 				m_connection = value;
+				ClearPreparedStatements();
 			}
 		}
 
@@ -185,6 +188,7 @@ public override CommandType CommandType
 				if (value != CommandType.Text && value != CommandType.StoredProcedure)
 					throw new ArgumentException("CommandType must be Text or StoredProcedure.", nameof(value));
 				m_commandType = value;
+				ClearPreparedStatements();
 			}
 		}
 
@@ -290,8 +294,7 @@ protected override void Dispose(bool disposing)
 				if (disposing)
 				{
 					m_parameterCollection = null;
-					m_parsedStatements?.Dispose();
-					m_parsedStatements = null;
+					ClearPreparedStatements();
 				}
 			}
 			finally
@@ -397,6 +400,13 @@ private bool IsValid(out Exception exception)
 			return exception == null;
 		}
 
+		private void ClearPreparedStatements()
+		{
+			m_parsedStatements?.Dispose();
+			m_parsedStatements = null;
+			m_statements = null;
+		}
+
 		internal void ReaderClosed() => (m_commandExecutor as StoredProcedureCommandExecutor)?.SetParams();
 
 		static int s_commandId = 1;

tests/SideBySide/QueryTests.cs

@@ -1012,13 +1012,15 @@ public void PreparedCommands(bool isPrepared, string dataType, object dataValue)
 					command.Parameters.AddWithValue("@data", dataValue);
 					if (isPrepared)
 						command.Prepare();
+					Assert.Equal(isPrepared, command.IsPrepared);
 					command.ExecuteNonQuery();
 				}
 
 				using (var command = new MySqlCommand("SELECT data FROM prepared_command_test ORDER BY rowid;", connection))
 				{
 					if (isPrepared)
 						command.Prepare();
+					Assert.Equal(isPrepared, command.IsPrepared);
 
 					using (var reader = command.ExecuteReader())
 					{