/// <summary>
/// RemoteConnection Quick Start client example.
/// Creates a Connection to a remote database and open it.
/// </summary>
/// <returns>The connection to the remote database</returns>
/// <exception cref="AceQLException">If any Exception occurs.</exception>
public static async Task <AceQLConnection> ConnectionBuilderAsync()
{
// Port number is the port number used to start the Web Server:
string server = "https://www.aceql.com:9443/aceql";
string database = "sampledb";
string connectionString = $"Server={server}; Database={database}";
// (username, password) for authentication on server side.
// No authentication will be done for our Quick Start:
string username = "******";
char[] password = { 'M', 'y', 'S', 'e', 'c', 'r', 'e', 't' };
AceQLConnection connection = new AceQLConnection(connectionString)
{
Credential = new AceQLCredential(username, password)
};
// Opens the connection with the remote database.
// On the server side, a JDBC connection is extracted from the connection
// pool created by the server at startup. The connection will remain ours
// during the session.
await connection.OpenAsync();
return(connection);
}
private async void buttonConnect_Click(object sender, EventArgs e)
{
if (connection != null)
{
PopMesssage.Show("You are already connected!", ACEQL_TEST);
return;
}
SetConnectionStatusColor(CONNECTION_COLOR_YELLOW);
Cursor.Current = Cursors.WaitCursor;
try
{
//AceQLConnection.SetTraceOn(true);
ConnectionBuilder connectionBuilder = new ConnectionBuilder(server, database, "username", "password".ToArray());
connection = connectionBuilder.GetConnection();
await connection.OpenAsync();
}
catch (Exception exeption)
{
Cursor.Current = Cursors.Default;
PopMesssage.Show("Could not connect: \n" + exeption.ToString(), ACEQL_TEST);
return;
}
SetConnectionStatusColor(CONNECTION_COLOR_GREEN);
Cursor.Current = Cursors.Default;
}
static async Task DoIt()
{
var netCoreVer = System.Environment.Version; // 3.0.0
AceQLConsole.WriteLine(netCoreVer + "");
string connectionString = ConnectionStringCurrent.Build();
using (AceQLConnection connection = new AceQLConnection(connectionString))
{
connection.RequestRetry = true;
connection.AddRequestHeader("aceqlHeader1", "myAceQLHeader1");
connection.AddRequestHeader("aceqlHeader2", "myAceQLHeader2");
await connection.OpenAsync();
if (DO_LOOP)
{
while (true)
{
await ExecuteExample(connection).ConfigureAwait(false);
Thread.Sleep(1000);
}
}
else
{
await ExecuteExample(connection).ConfigureAwait(false);
}
await connection.CloseAsync();
}
}
static async Task DoIt(string[] args)
{
string username = "******";
string password = "******";
//customer_id integer NOT NULL,
//customer_title character(4),
//fname character varying(32),
//lname character varying(32) NOT NULL,
//addressline character varying(64),
//town character varying(32),
//zipscode character(10) NOT NULL,
//phone character varying(32),
string connectionString = null;
bool useProxy = false;
if (useProxy)
{
string proxyUsername = "******";
string proxyPassword = "";
connectionString = $"Server={server}; Database={database}; ProxyUsername={proxyUsername}; ProxyPassword= {proxyPassword}";
}
else
{
connectionString = $"Server={server}; Database={database}";
}
AceQLCredential credential = new AceQLCredential(username, password.ToCharArray());
// Make sure connection is always closed to close and release server connection into the pool
using (AceQLConnection connection = new AceQLConnection(connectionString))
{
//connection.SetTraceOn(true);
connection.Credential = credential;
await ExecuteExample(connection).ConfigureAwait(false);
await connection.CloseAsync();
AceQLConnection connection2 = new AceQLConnection(connectionString)
{
Credential = credential
};
await connection2.OpenAsync();
AceQLConsole.WriteLine("connection2.GetServerVersion(): " + await connection2.GetServerVersionAsync());
await connection2.LogoutAsync().ConfigureAwait(false);
}
}
/// <summary>
/// RemoteConnection Quick Start client example.
/// Creates a Connection to a remote database and open it.
/// </summary>
/// <returns>The connection to the remote database</returns>
/// <exception cref="AceQLException">If any Exception occurs.</exception>
public static async Task <AceQLConnection> ConnectionBuilderAsync()
{
string connectionString = ConnectionStringCurrent.Build();
AceQLConnection theConnection = new AceQLConnection(connectionString);
// Opens the connection with the remote database.
// On the server side, a JDBC connection is extracted from the connection
// pool created by the server at startup. The connection will remain ours
// during the session.
await theConnection.OpenAsync();
return(theConnection);
}
public static async Task UseConnection()
{
string connectionString = null;
AceQLConnection connection = null;
try
{
connection = new AceQLConnection(connectionString);
await connection.OpenAsync();
// SQL stuff...
}
finally
{
await connection.CloseAsync();
}
}
static async Task DoIt()
{
string serverUrlLocalhost = "http://localhost:9090/aceql";
string server = serverUrlLocalhost;
string database = "sampledb";
string username = "******";
string sessionId = "4pdh8p2t14nd6j7dxt1owyjxef";
string connectionString = $"Server={server}; Database={database}";
Boolean doItWithCredential = true;
if (!doItWithCredential)
{
connectionString += $"; Username={username}; SessionId={sessionId}";
AceQLConsole.WriteLine("Using connectionString with SessionId: " + connectionString);
// Make sure connection is always closed to close and release server connection into the pool
using (AceQLConnection connection = new AceQLConnection(connectionString))
{
await connection.OpenAsync();
await AceQLTest.ExecuteExample(connection).ConfigureAwait(false);
await connection.CloseAsync();
}
}
else
{
AceQLConsole.WriteLine("Using AceQLCredential with SessionId: " + sessionId);
AceQLCredential credential = new AceQLCredential(username, sessionId);
// Make sure connection is always closed to close and release server connection into the pool
using (AceQLConnection connection = new AceQLConnection(connectionString))
{
connection.Credential = credential;
await connection.OpenAsync();
await AceQLTest.ExecuteExample(connection).ConfigureAwait(false);
await connection.CloseAsync();
}
}
}
/// <summary>
/// RemoteConnection Quick Start client example.
/// Creates a Connection to a remote database and open it.
/// </summary>
/// <returns>The connection to the remote database</returns>
/// <exception cref="AceQLException">If any Exception occurs.</exception>
public static async Task <AceQLConnection> ConnectionBuilderAsync()
{
// Port number is the port number used to start the Web Server:
string server = "http://localhost:9090/aceql";
string database = "sampledb";
string username = "******";
string password = "******";
string connectionString = $"Server={server}; Database={database}; "
+ $"Username={username}; Password={password}";
AceQLConnection connection = new AceQLConnection(connectionString);
// Opens the connection with the remote database
await connection.OpenAsync();
return(connection);
}
/// <summary>
/// Executes our example using an <see cref="AceQLConnection"/>
/// </summary>
/// <param name="connection"></param>
public static async Task ExecuteExample(AceQLConnection connection)
{
await connection.OpenAsync();
AceQLConsole.WriteLine("Host: " + connection.ConnectionInfo.ConnectionString);
AceQLConsole.WriteLine("aceQLConnection.GetClientVersion(): " + AceQLConnection.GetClientVersion());
AceQLConsole.WriteLine("aceQLConnection.GetServerVersion(): " + await connection.GetServerVersionAsync());
AceQLConsole.WriteLine("AceQL local folder: ");
AceQLConsole.WriteLine(AceQLConnection.GetAceQLLocalFolder());
int maxSelect = 1;
for (int j = 0; j < maxSelect; j++)
{
string sql = "select * from customer where customer_id > @parm1 and lname = @parm2";
AceQLCommand command = new AceQLCommand(sql, connection);
command.Parameters.AddWithValue("@parm2", "Name_5");
command.Parameters.AddWithValue("@parm1", 1);
// Our dataReader must be disposed to delete underlying downloaded files
using (AceQLDataReader dataReader = await command.ExecuteReaderAsync())
{
//await dataReader.ReadAsync(new CancellationTokenSource().Token)
while (dataReader.Read())
{
AceQLConsole.WriteLine();
AceQLConsole.WriteLine("" + DateTime.Now);
int i = 0;
AceQLConsole.WriteLine("GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i));
}
}
}
}
/// <summary>
/// RemoteConnection Quick Start client example.
/// Creates a Connection to a remote database and open it.
/// </summary>
/// <returns>The connection to the remote database</returns>
/// <exception cref="AceQLException">If any Exception occurs.</exception>
public static async Task <AceQLConnection> ConnectionBuilderAsync()
{
// C# Example: connection to a remote database
string server = "https://www.acme.com:9443/aceql";
string database = "sampledb";
string username = "******";
string password = "******";
string connectionString = $"Server={server}; Database={database}; "
+ $"Username={username}; Password={password}";
AceQLConnection connection = new AceQLConnection(connectionString);
// Attempt to establish a connection to the remote SQL database:
await connection.OpenAsync();
AceQLConsole.WriteLine("Connected to database " + database + "!");
return(connection);
}
/// <summary>
/// RemoteConnection Quick Start client example.
/// Creates a Connection to a remote database and open it.
/// </summary>
/// <returns>The connection to the remote database</returns>
/// <exception cref="AceQLException">If any Exception occurs.</exception>
public static async Task <AceQLConnection> ConnectionBuilderAsyncWithCredential()
{
string server = "https://www.aceql.com:9443/aceql";
string database = "sampledb";
string connectionString = $"Server={server}; Database={database}";
string username = "******";
char[] password = { 'M', 'y', 'S', 'e', 'c', 'r', 'e', 't' };
AceQLConnection connection = new AceQLConnection(connectionString)
{
Credential = new AceQLCredential(username, password)
};
// Opens the connection with the remote database
await connection.OpenAsync();
AceQLConsole.WriteLine("Successfully connected to database " + database + "!");
return(connection);
}
/// <summary>
/// RemoteConnection Quick Start client example.
/// Creates a Connection to a remote database and open it.
/// </summary>
/// <returns>The connection to the remote database</returns>
/// <exception cref="AceQLException">If any Exception occurs.</exception>
public static async Task <AceQLConnection> ConnectionBuilderAsyncWithCredential()
{
// Port number is the port number used to start the Web Server:
string server = "http://localhost:9090/aceql";
string database = "sampledb";
string connectionString = $"Server={server}; Database={database}";
string username = "******";
char[] password = GetFromUserInput();
AceQLConnection connection = new AceQLConnection(connectionString)
{
Credential = new AceQLCredential(username, password)
};
// Opens the connection with the remote database
await connection.OpenAsync();
return(connection);
}
/// <summary>
/// Executes our example using an <see cref="AceQLConnection"/>
/// </summary>
/// <param name="connection"></param>
private static async Task ExecuteExample(AceQLConnection connection)
{
await connection.OpenAsync();
AceQLConsole.WriteLine("host: " + connection.ConnectionString);
AceQLConsole.WriteLine("aceQLConnection.GetClientVersion(): " + AceQLConnection.GetClientVersion());
AceQLConsole.WriteLine("aceQLConnection.GetServerVersion(): " + await connection.GetServerVersionAsync());
AceQLConsole.WriteLine("AceQL local folder: ");
AceQLConsole.WriteLine(await AceQLConnection.GetAceQLLocalFolderAsync());
RemoteDatabaseMetaData remoteDatabaseMetaData = connection.GetRemoteDatabaseMetaData();
string userPath = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
string schemaFilePath = userPath + "\\db_schema.out.html";
// Download Schema in HTML format:
using (Stream stream = await remoteDatabaseMetaData.DbSchemaDownloadAsync())
{
using (var fileStream = File.Create(schemaFilePath))
{
stream.CopyTo(fileStream);
}
}
System.Diagnostics.Process.Start(schemaFilePath);
AceQLConsole.WriteLine("Creating schema done.");
JdbcDatabaseMetaData jdbcDatabaseMetaData = await remoteDatabaseMetaData.GetJdbcDatabaseMetaDataAsync();
AceQLConsole.WriteLine("Major Version: " + jdbcDatabaseMetaData.GetJDBCMajorVersion);
AceQLConsole.WriteLine("Minor Version: " + jdbcDatabaseMetaData.GetJDBCMinorVersion);
AceQLConsole.WriteLine("IsReadOnly : " + jdbcDatabaseMetaData.IsReadOnly);
AceQLConsole.WriteLine("JdbcDatabaseMetaData: " + jdbcDatabaseMetaData.ToString().Substring(1, 200));
AceQLConsole.WriteLine();
AceQLConsole.WriteLine("Get the table names:");
List <String> tableNames = await remoteDatabaseMetaData.GetTableNamesAsync();
AceQLConsole.WriteLine("Print the column details of each table:");
foreach (String tableName in tableNames)
{
Table table = await remoteDatabaseMetaData.GetTableAsync(tableName);
AceQLConsole.WriteLine("Columns:");
foreach (Column column in table.Columns)
{
AceQLConsole.WriteLine(column.ToString());
}
}
AceQLConsole.WriteLine();
String name = "orderlog";
Table tableOrderlog = await remoteDatabaseMetaData.GetTableAsync(name);
AceQLConsole.WriteLine("table name: " + tableOrderlog.TableName);
AceQLConsole.WriteLine("table keys: ");
List <PrimaryKey> primakeys = tableOrderlog.PrimaryKeys;
foreach (PrimaryKey primaryKey in primakeys)
{
AceQLConsole.WriteLine("==> primaryKey: " + primaryKey);
}
AceQLConsole.WriteLine();
AceQLConsole.WriteLine("Full table: " + tableOrderlog);
AceQLConsole.WriteLine();
AceQLConsole.WriteLine("Done.");
}
/// <summary>
/// Executes our example using an <see cref="AceQLConnection"/>
/// </summary>
/// <param name="connection"></param>
private static async Task ExecuteExample(AceQLConnection connection)
{
await connection.OpenAsync();
AceQLConsole.WriteLine("host: " + connection.ConnectionInfo.ConnectionString);
AceQLConsole.WriteLine("aceQLConnection.GetClientVersion(): " + AceQLConnection.GetClientVersion());
AceQLConsole.WriteLine("aceQLConnection.GetServerVersion(): " + await connection.GetServerVersionAsync());
AceQLConsole.WriteLine("AceQL local folder: ");
AceQLConsole.WriteLine(AceQLConnection.GetAceQLLocalFolder());
AceQLTransaction transaction = await connection.BeginTransactionAsync();
await transaction.CommitAsync();
transaction.Dispose();
string sql = "delete from customer_2";
AceQLCommand command = new AceQLCommand
{
CommandText = sql,
Connection = connection
};
command.Prepare();
await command.ExecuteNonQueryAsync();
for (int i = 0; i < 3; i++)
{
sql =
"insert into customer_2 values (@parm1, @parm2, @parm3, @parm4, @parm5, @parm6, @parm7, @parm8, @parm9, @parm_10)";
command = new AceQLCommand(sql, connection);
int customer_id = i;
command.Parameters.AddWithValue("@parm1", customer_id);
command.Parameters.AddWithValue("@parm2", "Sir");
command.Parameters.AddWithValue("@parm3", "André_" + customer_id);
command.Parameters.Add(new AceQLParameter("@parm4", "Name_" + customer_id));
command.Parameters.AddWithValue("@parm5", customer_id + ", road 66");
command.Parameters.AddWithValue("@parm6", "Town_" + customer_id);
command.Parameters.AddWithValue("@parm7", customer_id + "1111");
command.Parameters.Add(new AceQLParameter("@parm8", AceQLNullType.VARCHAR)); //null value for NULL SQL insert.
command.Parameters.AddWithValue("@parm9", customer_id + "_row_2");
command.Parameters.AddWithValue("@parm_10", customer_id + "_row_count");
CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
await command.ExecuteNonQueryAsync(cancellationTokenSource.Token);
}
command.Dispose();
sql = "select * from customer_2";
command = new AceQLCommand(sql, connection);
// Our dataReader must be disposed to delete underlying downloaded files
using (AceQLDataReader dataReader = await command.ExecuteReaderAsync())
{
while (dataReader.Read())
{
AceQLConsole.WriteLine();
int i = 0;
AceQLConsole.WriteLine("GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i));
}
}
AceQLConsole.WriteLine("Done.");
}
/// <summary>
/// Executes our example using an <see cref="AceQLConnection"/>
/// </summary>
/// <param name="connection"></param>
private static async Task ExecuteExample(AceQLConnection connection)
{
//Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
string IN_DIRECTORY = "c:\\test\\";
string OUT_DIRECTORY = "c:\\test\\out\\";
await connection.OpenAsync();
AceQLConsole.WriteLine("AceQLConnection.GetClientVersion(): " + AceQLConnection.GetClientVersion());
AceQLConsole.WriteLine("AceQLConnection.GetServerVersion(): " + await connection.GetServerVersionAsync());
AceQLConsole.WriteLine("AceQL local folder: ");
AceQLConsole.WriteLine(await AceQLConnection.GetAceQLLocalFolderAsync());
AceQLTransaction transaction = await connection.BeginTransactionAsync();
await transaction.CommitAsync();
transaction.Dispose();
AceQLConsole.WriteLine("Before delete from orderlog");
// Do next delete in a transaction because of BLOB
transaction = await connection.BeginTransactionAsync();
string sql = "delete from orderlog";
AceQLCommand command = new AceQLCommand(sql, connection);
await command.ExecuteNonQueryAsync();
command.Dispose();
await transaction.CommitAsync();
// Do next inserts in a transaction because of BLOB
transaction = await connection.BeginTransactionAsync();
AceQLConsole.WriteLine("Before insert into orderlog");
try
{
sql =
"insert into orderlog values (@parm1, @parm2, @parm3, @parm4, @parm5, @parm6, @parm7, @parm8, @parm9)";
command = new AceQLCommand(sql, connection);
int customer_id = 1;
string blobPath = IN_DIRECTORY + "username_koala.jpg";
Stream stream = new FileStream(blobPath, FileMode.Open, System.IO.FileAccess.Read);
//customer_id integer NOT NULL,
//item_id integer NOT NULL,
//description character varying(64) NOT NULL,
//cost_price numeric,
//date_placed date NOT NULL,
//date_shipped timestamp without time zone,
//jpeg_image oid,
//is_delivered numeric,
//quantity integer NOT NULL,
command.Parameters.AddWithValue("@parm1", customer_id);
command.Parameters.AddWithValue("@parm2", customer_id);
command.Parameters.AddWithValue("@parm3", "Description_" + customer_id);
command.Parameters.Add(new AceQLParameter("@parm4", new AceQLNullValue(AceQLNullType.DECIMAL))); //null value for NULL SQL insert.
command.Parameters.AddWithValue("@parm5", DateTime.Now);
command.Parameters.AddWithValue("@parm6", DateTime.Now);
// Adds the Blob. (Stream will be closed by AceQLCommand)
command.Parameters.AddWithValue("@parm7", stream);
command.Parameters.AddWithValue("@parm8", 1);
command.Parameters.AddWithValue("@parm9", 1 * 2000);
await command.ExecuteNonQueryAsync();
await transaction.CommitAsync();
}
catch (Exception exception)
{
await transaction.RollbackAsync();
throw exception;
}
AceQLConsole.WriteLine("Before select * from orderlog");
// Do next selects in a transaction because of BLOB
transaction = await connection.BeginTransactionAsync();
sql = "select * from orderlog where cutomer_id = 1 and order_id = 1";
command = new AceQLCommand(sql, connection);
using (AceQLDataReader dataReader = await command.ExecuteReaderAsync())
{
int k = 0;
while (dataReader.Read())
{
AceQLConsole.WriteLine();
int i = 0;
AceQLConsole.WriteLine("GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++));
// Download Blobs
string blobPath = OUT_DIRECTORY + "username_koala_" + k + ".jpg";
k++;
using (Stream stream = await dataReader.GetStreamAsync(6))
{
using (var fileStream = File.Create(blobPath))
{
//stream.CopyTo(fileStream);
CopyStream(stream, fileStream);
}
}
}
}
await transaction.CommitAsync();
}
/// <summary>
/// Executes our example using an <see cref="AceQLConnection"/>
/// </summary>
/// <param name="connection"></param>
private static async Task ExecuteExample(AceQLConnection connection)
{
string IN_DIRECTORY = AceQLConnection.GetAceQLLocalFolder() + "\\";
string OUT_DIRECTORY = IN_DIRECTORY + "out\\";
_ = Directory.CreateDirectory(OUT_DIRECTORY);
await connection.OpenAsync();
AceQLConsole.WriteLine("ConnectionString: " + connection.ConnectionInfo.ConnectionString);
AceQLConsole.WriteLine();
AceQLConsole.WriteLine("AceQLConnection.GetClientVersion(): " + AceQLConnection.GetClientVersion());
AceQLConsole.WriteLine("AceQLConnection.GetServerVersion(): " + await connection.GetServerVersionAsync());
AceQLConsole.WriteLine("AceQL local folder: ");
AceQLConsole.WriteLine(AceQLConnection.GetAceQLLocalFolder());
if (!CONSOLE_INPUT_DONE)
{
AceQLConsole.WriteLine();
AceQLConsole.WriteLine("Press enter to close....");
Console.ReadLine();
CONSOLE_INPUT_DONE = true;
}
AceQLTransaction transaction = await connection.BeginTransactionAsync();
await transaction.CommitAsync();
transaction.Dispose();
string sql = "delete from customer";
AceQLCommand command = null;
command = new AceQLCommand()
{
CommandText = sql,
Connection = connection
};
command.Prepare();
await command.ExecuteNonQueryAsync();
sql = "delete from dustomer";
command = new AceQLCommand()
{
CommandText = sql,
Connection = connection
};
command.Prepare();
try
{
await command.ExecuteNonQueryAsync();
}
catch (Exception exception)
{
AceQLConsole.WriteLine(exception.ToString());
}
sql = "delete from dustomer where customer_id = @parm1 or fname = @parm2 ";
command = new AceQLCommand()
{
CommandText = sql,
Connection = connection
};
command.Parameters.AddWithValue("@parm1", 1);
command.Parameters.AddWithValue("@parm2", "Doe");
try
{
await command.ExecuteNonQueryAsync();
}
catch (Exception exception)
{
AceQLConsole.WriteLine(exception.ToString());
}
for (int i = 0; i < 3; i++)
{
sql =
"insert into customer values (@parm1, @parm2, @parm3, @parm4, @parm5, @parm6, @parm7, @parm8)";
command = new AceQLCommand(sql, connection);
int customer_id = i;
command.Parameters.AddWithValue("@parm1", customer_id);
command.Parameters.AddWithValue("@parm2", "Sir");
command.Parameters.AddWithValue("@parm3", "André_" + customer_id);
command.Parameters.Add(new AceQLParameter("@parm4", "Name_" + customer_id));
command.Parameters.AddWithValue("@parm5", customer_id + ", road 66");
command.Parameters.AddWithValue("@parm6", "Town_" + customer_id);
command.Parameters.AddWithValue("@parm7", customer_id + "1111");
command.Parameters.Add(new AceQLParameter("@parm8", new AceQLNullValue(AceQLNullType.VARCHAR))); //null value for NULL SQL insert.
CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
await command.ExecuteNonQueryAsync(cancellationTokenSource.Token);
}
command.Dispose();
sql = "select * from customer";
command = new AceQLCommand(sql, connection);
// Our dataReader must be disposed to delete underlying downloaded files
using (AceQLDataReader dataReader = await command.ExecuteReaderAsync())
{
//await dataReader.ReadAsync(new CancellationTokenSource().Token)
while (dataReader.Read())
{
AceQLConsole.WriteLine();
int i = 0;
AceQLConsole.WriteLine("GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++));
}
}
AceQLConsole.WriteLine("Before delete from orderlog 2");
// Do next delete in a transaction because of BLOB
transaction = await connection.BeginTransactionAsync();
sql = "delete from orderlog";
command = new AceQLCommand(sql, connection);
await command.ExecuteNonQueryAsync();
command.Dispose();
AceQLConsole.WriteLine("After delete from orderlog 2");
await transaction.CommitAsync();
Boolean doBlob = true;
if (!doBlob)
{
return;
}
// Do next inserts in a transaction because of BLOB
transaction = await connection.BeginTransactionAsync();
try
{
for (int j = 1; j < 4; j++)
{
sql =
"insert into orderlog values (@parm1, @parm2, @parm3, @parm4, @parm5, @parm6, @parm7, @parm8, @parm9)";
command = new AceQLCommand(sql, connection);
int customer_id = j;
string blobPath = null;
int index = getIndexFromDatabase();
blobPath = IN_DIRECTORY + "username_koala_" + index + ".jpg";
Stream stream = new FileStream(blobPath, FileMode.Open, System.IO.FileAccess.Read);
//customer_id integer NOT NULL,
//item_id integer NOT NULL,
//description character varying(64) NOT NULL,
//cost_price numeric,
//date_placed date NOT NULL,
//date_shipped timestamp without time zone,
//jpeg_image oid,
//is_delivered numeric,
//quantity integer NOT NULL,
command.Parameters.AddWithValue("@parm1", customer_id);
command.Parameters.AddWithValue("@parm2", customer_id);
command.Parameters.AddWithValue("@parm3", "Description_" + customer_id);
command.Parameters.Add(new AceQLParameter("@parm4", new AceQLNullValue(AceQLNullType.DECIMAL))); //null value for NULL SQL insert.
command.Parameters.AddWithValue("@parm5", DateTime.Now);
command.Parameters.AddWithValue("@parm6", DateTime.Now);
// Adds the Blob. (Stream will be closed by AceQLCommand)
command.Parameters.AddWithValue("@parm7", stream);
command.Parameters.AddWithValue("@parm8", 1);
command.Parameters.AddWithValue("@parm9", j * 2000);
AceQLConsole.WriteLine("Before await command.ExecuteNonQueryAsync()");
await command.ExecuteNonQueryAsync();
AceQLConsole.WriteLine("After await command.ExecuteNonQueryAsync()");
}
AceQLConsole.WriteLine("transaction.CommitAsync()");
await transaction.CommitAsync();
}
catch (Exception)
{
await transaction.RollbackAsync();
throw;
}
AceQLConsole.WriteLine("Before select * from orderlog");
// Do next selects in a transaction because of BLOB
transaction = await connection.BeginTransactionAsync();
sql = "select * from orderlog";
command = new AceQLCommand(sql, connection);
using (AceQLDataReader dataReader = await command.ExecuteReaderAsync())
{
int k = 0;
while (dataReader.Read())
{
AceQLConsole.WriteLine();
int i = 0;
AceQLConsole.WriteLine("Get values using ordinal values:");
AceQLConsole.WriteLine("GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++) + "\n"
+ "GetValue: " + dataReader.GetValue(i++));
//customer_id
//item_id
//description
//item_cost
//date_placed
//date_shipped
//jpeg_image
//is_delivered
//quantity
AceQLConsole.WriteLine();
AceQLConsole.WriteLine("Get values using column name values:");
AceQLConsole.WriteLine("GetValue: " + dataReader.GetValue(dataReader.GetOrdinal("customer_id"))
+ "\n"
+ "GetValue: " + dataReader.GetValue(dataReader.GetOrdinal("item_id")) + "\n"
+ "GetValue: " + dataReader.GetValue(dataReader.GetOrdinal("description")) + "\n"
+ "GetValue: " + dataReader.GetValue(dataReader.GetOrdinal("item_cost")) + "\n"
+ "GetValue: " + dataReader.GetValue(dataReader.GetOrdinal("date_placed")) + "\n"
+ "GetValue: " + dataReader.GetValue(dataReader.GetOrdinal("date_shipped")) + "\n"
+ "GetValue: " + dataReader.GetValue(dataReader.GetOrdinal("jpeg_image")) + "\n"
+ "GetValue: " + dataReader.GetValue(dataReader.GetOrdinal("is_delivered")) + "\n"
+ "GetValue: " + dataReader.GetValue(dataReader.GetOrdinal("quantity")));
AceQLConsole.WriteLine("==> dataReader.IsDBNull(3): " + dataReader.IsDBNull(3));
AceQLConsole.WriteLine("==> dataReader.IsDBNull(4): " + dataReader.IsDBNull(4));
// Download Blobs
int index = getIndexFromDatabase();
string blobPath = OUT_DIRECTORY + "username_koala_" + index + "_" + k + ".jpg";
k++;
using (Stream stream = await dataReader.GetStreamAsync(6))
{
using (var fileStream = File.Create(blobPath))
{
stream.CopyTo(fileStream);
}
}
}
}
await transaction.CommitAsync();
}