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339 lines
15 KiB
339 lines
15 KiB
#if MYSQL_6_10
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// Copyright © 2004, 2018, Oracle and/or its affiliates. All rights reserved.
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//
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// MySQL Connector/NET is licensed under the terms of the GPLv2
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// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
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// MySQL Connectors. There are special exceptions to the terms and
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// conditions of the GPLv2 as it is applied to this software, see the
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// FLOSS License Exception
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// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published
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// by the Free Software Foundation; version 2 of the License.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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using System;
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using System.Data;
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using System.Threading;
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using System.Threading.Tasks;
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namespace Externals.MySql.Data.MySqlClient
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{
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internal partial class MySqlHelper
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{
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#region DataRow
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/// <summary>
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/// Asynchronous version of ExecuteDataRow.
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/// </summary>
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/// <param name="connectionString">The settings to be used for the connection.</param>
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/// <param name="commandText">The command to execute.</param>
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/// <param name="parms">The parameters to use for the command.</param>
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/// <returns>The DataRow containing the first row of the resultset.</returns>
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public static Task<DataRow> ExecuteDataRowAsync(string connectionString, string commandText, params MySqlParameter[] parms)
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{
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return ExecuteDataRowAsync(connectionString, commandText, CancellationToken.None, parms);
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}
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/// <summary>
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/// Asynchronous version of ExecuteDataRow.
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/// </summary>
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/// <param name="connectionString">The settings to be used for the connection.</param>
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/// <param name="commandText">The command to execute.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <param name="parms">The parameters to use for the command.</param>
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/// <returns>The DataRow containing the first row of the resultset.</returns>
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public static Task<DataRow> ExecuteDataRowAsync(string connectionString, string commandText, CancellationToken cancellationToken, params MySqlParameter[] parms)
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{
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var result = new TaskCompletionSource<DataRow>();
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if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
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{
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try
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{
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var row = ExecuteDataRow(connectionString, commandText, parms);
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result.SetResult(row);
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}
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catch (Exception ex)
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{
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result.SetException(ex);
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}
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}
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else
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{
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result.SetCanceled();
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}
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return result.Task;
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}
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#endregion
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#region DataSet
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/// <summary>
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/// Executes a single SQL command and returns the first row of the resultset. A new MySqlConnection object
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/// is created, opened, and closed during this method.
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/// </summary>
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/// <param name="connectionString">Settings to be used for the connection</param>
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/// <param name="commandText">Command to execute</param>
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/// <param name="parms">Parameters to use for the command</param>
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/// <returns>DataRow containing the first row of the resultset</returns>
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public static DataRow ExecuteDataRow(string connectionString, string commandText, params MySqlParameter[] parms)
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{
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DataSet ds = ExecuteDataset(connectionString, commandText, parms);
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if (ds == null) return null;
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if (ds.Tables.Count == 0) return null;
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if (ds.Tables[0].Rows.Count == 0) return null;
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return ds.Tables[0].Rows[0];
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}
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/// <summary>
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/// Executes a single SQL command and returns the resultset in a <see cref="DataSet"/>.
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/// A new MySqlConnection object is created, opened, and closed during this method.
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/// </summary>
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/// <param name="connectionString">Settings to be used for the connection</param>
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/// <param name="commandText">Command to execute</param>
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/// <returns><see cref="DataSet"/> containing the resultset</returns>
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public static DataSet ExecuteDataset(string connectionString, string commandText)
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{
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//pass through the call providing null for the set of SqlParameters
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return ExecuteDataset(connectionString, commandText, (MySqlParameter[])null);
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}
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/// <summary>
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/// Executes a single SQL command and returns the resultset in a <see cref="DataSet"/>.
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/// A new MySqlConnection object is created, opened, and closed during this method.
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/// </summary>
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/// <param name="connectionString">Settings to be used for the connection</param>
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/// <param name="commandText">Command to execute</param>
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/// <param name="commandParameters">Parameters to use for the command</param>
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/// <returns><see cref="DataSet"/> containing the resultset</returns>
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public static DataSet ExecuteDataset(string connectionString, string commandText, params MySqlParameter[] commandParameters)
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{
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//create & open a SqlConnection, and dispose of it after we are done.
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using (MySqlConnection cn = new MySqlConnection(connectionString))
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{
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cn.Open();
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//call the overload that takes a connection in place of the connection string
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return ExecuteDataset(cn, commandText, commandParameters);
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}
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}
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/// <summary>
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/// Executes a single SQL command and returns the resultset in a <see cref="DataSet"/>.
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/// The state of the <see cref="MySqlConnection"/> object remains unchanged after execution
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/// of this method.
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/// </summary>
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/// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
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/// <param name="commandText">Command to execute</param>
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/// <returns><see cref="DataSet"/> containing the resultset</returns>
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public static DataSet ExecuteDataset(MySqlConnection connection, string commandText)
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{
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//pass through the call providing null for the set of SqlParameters
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return ExecuteDataset(connection, commandText, (MySqlParameter[])null);
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}
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/// <summary>
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/// Executes a single SQL command and returns the resultset in a <see cref="DataSet"/>.
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/// The state of the <see cref="MySqlConnection"/> object remains unchanged after execution
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/// of this method.
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/// </summary>
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/// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
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/// <param name="commandText">Command to execute</param>
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/// <param name="commandParameters">Parameters to use for the command</param>
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/// <returns><see cref="DataSet"/> containing the resultset</returns>
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public static DataSet ExecuteDataset(MySqlConnection connection, string commandText, params MySqlParameter[] commandParameters)
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{
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//create a command and prepare it for execution
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MySqlCommand cmd = new MySqlCommand();
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cmd.Connection = connection;
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cmd.CommandText = commandText;
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cmd.CommandType = CommandType.Text;
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if (commandParameters != null)
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foreach (MySqlParameter p in commandParameters)
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cmd.Parameters.Add(p);
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//create the DataAdapter & DataSet
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MySqlDataAdapter da = new MySqlDataAdapter(cmd);
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DataSet ds = new DataSet();
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//fill the DataSet using default values for DataTable names, etc.
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da.Fill(ds);
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// detach the MySqlParameters from the command object, so they can be used again.
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cmd.Parameters.Clear();
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//return the dataset
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return ds;
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}
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/// <summary>
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/// Updates the given table with data from the given <see cref="DataSet"/>
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/// </summary>
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/// <param name="connectionString">Settings to use for the update</param>
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/// <param name="commandText">Command text to use for the update</param>
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/// <param name="ds"><see cref="DataSet"/> containing the new data to use in the update</param>
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/// <param name="tablename">Tablename in the dataset to update</param>
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public static void UpdateDataSet(string connectionString, string commandText, DataSet ds, string tablename)
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{
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MySqlConnection cn = new MySqlConnection(connectionString);
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cn.Open();
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MySqlDataAdapter da = new MySqlDataAdapter(commandText, cn);
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MySqlCommandBuilder cb = new MySqlCommandBuilder(da);
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cb.ToString();
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da.Update(ds, tablename);
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cn.Close();
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}
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/// <summary>
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/// Async version of ExecuteDataset
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/// </summary>
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/// <param name="connectionString">Settings to be used for the connection</param>
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/// <param name="commandText">Command to execute</param>
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/// <returns><see cref="DataSet"/> containing the resultset</returns>
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public static Task<DataSet> ExecuteDatasetAsync(string connectionString, string commandText)
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{
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return ExecuteDatasetAsync(connectionString, commandText, CancellationToken.None, (MySqlParameter[])null);
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}
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public static Task<DataSet> ExecuteDatasetAsync(string connectionString, string commandText, CancellationToken cancellationToken)
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{
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return ExecuteDatasetAsync(connectionString, commandText, cancellationToken, (MySqlParameter[])null);
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}
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/// <summary>
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/// Async version of ExecuteDataset
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/// </summary>
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/// <param name="connectionString">Settings to be used for the connection</param>
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/// <param name="commandText">Command to execute</param>
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/// <param name="commandParameters">Parameters to use for the command</param>
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/// <returns><see cref="DataSet"/> containing the resultset</returns>
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public static Task<DataSet> ExecuteDatasetAsync(string connectionString, string commandText, params MySqlParameter[] commandParameters)
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{
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return ExecuteDatasetAsync(connectionString, commandText, CancellationToken.None, commandParameters);
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}
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public static Task<DataSet> ExecuteDatasetAsync(string connectionString, string commandText, CancellationToken cancellationToken, params MySqlParameter[] commandParameters)
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{
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var result = new TaskCompletionSource<DataSet>();
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if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
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{
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try
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{
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var dataset = ExecuteDataset(connectionString, commandText, commandParameters);
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result.SetResult(dataset);
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}
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catch (Exception ex)
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{
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result.SetException(ex);
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}
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}
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else
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{
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result.SetCanceled();
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}
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return result.Task;
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}
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/// <summary>
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/// Async version of ExecuteDataset
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/// </summary>
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/// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
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/// <param name="commandText">Command to execute</param>
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/// <returns><see cref="DataSet"/> containing the resultset</returns>
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public static Task<DataSet> ExecuteDatasetAsync(MySqlConnection connection, string commandText)
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{
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return ExecuteDatasetAsync(connection, commandText, CancellationToken.None, (MySqlParameter[])null);
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}
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public static Task<DataSet> ExecuteDatasetAsync(MySqlConnection connection, string commandText, CancellationToken cancellationToken)
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{
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return ExecuteDatasetAsync(connection, commandText, cancellationToken, (MySqlParameter[])null);
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}
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/// <summary>
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/// Async version of ExecuteDataset
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/// </summary>
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/// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
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/// <param name="commandText">Command to execute</param>
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/// <param name="commandParameters">Parameters to use for the command</param>
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/// <returns><see cref="DataSet"/> containing the resultset</returns>
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public static Task<DataSet> ExecuteDatasetAsync(MySqlConnection connection, string commandText, params MySqlParameter[] commandParameters)
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{
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return ExecuteDatasetAsync(connection, commandText, CancellationToken.None, commandParameters);
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}
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public static Task<DataSet> ExecuteDatasetAsync(MySqlConnection connection, string commandText, CancellationToken cancellationToken, params MySqlParameter[] commandParameters)
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{
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var result = new TaskCompletionSource<DataSet>();
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if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
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{
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try
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{
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var dataset = ExecuteDataset(connection, commandText, commandParameters);
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result.SetResult(dataset);
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}
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catch (Exception ex)
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{
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result.SetException(ex);
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}
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}
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else
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{
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result.SetCanceled();
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}
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return result.Task;
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}
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/// <summary>
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/// Async version of UpdateDataset
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/// </summary>
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/// <param name="connectionString">Settings to use for the update</param>
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/// <param name="commandText">Command text to use for the update</param>
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/// <param name="ds"><see cref="DataSet"/> containing the new data to use in the update</param>
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/// <param name="tablename">Tablename in the dataset to update</param>
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public static Task UpdateDataSetAsync(string connectionString, string commandText, DataSet ds, string tablename)
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{
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return UpdateDataSetAsync(connectionString, commandText, ds, tablename, CancellationToken.None);
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}
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public static Task UpdateDataSetAsync(string connectionString, string commandText, DataSet ds, string tablename, CancellationToken cancellationToken)
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{
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var result = new TaskCompletionSource<bool>();
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if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
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{
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try
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{
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UpdateDataSet(connectionString, commandText, ds, tablename);
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result.SetResult(true);
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}
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catch (Exception ex)
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{
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result.SetException(ex);
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}
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}
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else
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{
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result.SetCanceled();
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}
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return result.Task;
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}
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#endregion
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}
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}
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#endif
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