/// <summary>
/// Return a <see cref="System.Object"/>
/// based on the DBMS query.
/// </summary>
/// <param name="connection">The object implementing <see cref="System.Data.IDbConnection"/>.</param>
/// <param name="query">The SELECT SQL statement.</param>
/// <param name="parameterCollection">The parameters.</param>
public static object GetObject(IDbConnection connection, string query, IEnumerable parameterCollection)
{
if (connection == null)
{
throw new ArgumentNullException("connection", "The Common Connection object is null.");
}
if (string.IsNullOrEmpty(query))
{
throw new ArgumentException("The DBMS query was not specified.");
}
object o = null;
using (IDbCommand cmd = connection.CreateCommand())
{
if (parameterCollection != null)
{
IDataParameter[] paramArray = CommonParameterUtility.GetParameters(cmd, parameterCollection);
foreach (IDataParameter p in paramArray)
{
cmd.Parameters.Add(p);
}
}
cmd.CommandType = CommandType.Text;
cmd.CommandText = query;
o = cmd.ExecuteScalar();
}
return(o);
}
/// <summary>
/// Returns an instance of <see cref="System.Data.IDataReader"/>
/// based on the object implementing <see cref="System.Data.IDbConnection"/>.
/// </summary>
/// <param name="connection">The object implementing <see cref="System.Data.IDbConnection"/>.</param>
/// <param name="query">The SELECT SQL statement.</param>
/// <param name="parameterCollection">A list of parameters.</param>
/// <param name="timeout">Command timeout in seconds.</param>
/// <param name="ambientTransaction">The ambient <see cref="System.Data.IDbTransaction"/> implementation.</param>
public static IDataReader GetReader(IDbConnection cnn, string query, IEnumerable parameterCollection, int timeout, IDbTransaction ambientTransaction)
{
if (cnn == null)
{
throw new ArgumentNullException("connection", "The implementing Connection object is null.");
}
if (string.IsNullOrEmpty(query))
{
throw new ArgumentException("The DBMS query was not specified.");
}
IDataReader r = null;
using (IDbCommand selectCommand = cnn.CreateCommand())
{
var parameters = CommonParameterUtility.GetParameters(selectCommand, parameterCollection);
selectCommand.CommandType = (query.ToLower().Contains("select")) ? CommandType.Text : CommandType.StoredProcedure;
selectCommand.CommandText = query;
selectCommand.CommandTimeout = timeout;
if (parameters != null)
{
foreach (IDataParameter p in parameters)
{
selectCommand.Parameters.Add(p);
}
}
if (ambientTransaction != null)
{
selectCommand.Transaction = ambientTransaction;
}
r = selectCommand.ExecuteReader(CommandBehavior.Default);
}
return(r);
}
/// <summary>
/// Return a <see cref="System.String"/>
/// based on the DBMS query.
/// </summary>
/// <param name="connection">The object implementing <see cref="System.Data.IDbConnection"/>.</param>
/// <param name="query">The SQL statement.</param>
/// <param name="parameterCollection">The parameters.</param>
/// <param name="returnXmlForEmptySet">When <c>true</c> <see cref="Songhay.Xml.XmlUtility.GetInternalMessage(string,string[])"/> is used for empty sets.</param>
public static string GetString(IDbConnection connection, string query, IEnumerable parameterCollection, bool returnXmlForEmptySet)
{
if (connection == null)
{
throw new ArgumentNullException("connection", "The Common Connection object is null.");
}
if (string.IsNullOrEmpty(query))
{
throw new ArgumentException("The DBMS query was not specified.");
}
string s = null;
if (connection.State != ConnectionState.Open)
{
throw new DataException(string.Format("The Connection to the DBMS is not open."));
}
using (IDbCommand cmd = connection.CreateCommand())
{
cmd.CommandType = CommandType.Text;
cmd.CommandText = query;
if (parameterCollection != null)
{
IDataParameter[] parameters = CommonParameterUtility.GetParameters(cmd, parameterCollection);
foreach (IDataParameter p in parameters)
{
cmd.Parameters.Add(p);
}
}
object o = cmd.ExecuteScalar();
if (o is string)
{
s = o.ToString();
}
if (string.IsNullOrEmpty(s) && returnXmlForEmptySet)
{
string[] sa = new string[] { "The query executed against the DBMS connection returned an empty set." };
s = XmlUtility.GetInternalMessage("The query Returned No Data", sa);
}
}
return(s);
}
/// <summary>
/// Executes a SQL sqlStatement for the current instance of <see cref="IDbConnection"/>.
/// </summary>
/// <param name="connection">The object implementing <see cref="IDbConnection"/>.</param>
/// <param name="ambientTransaction">An instance of the explicit, server <see cref="IDbTransaction"/>.</param>
/// <param name="sqlStatement">The SQL statement.</param>
/// <param name="parameterCollection">The parameters.</param>
/// <returns>Returns the number of records affected.</returns>
public static int DoCommand(IDbConnection connection, IDbTransaction ambientTransaction, string sqlStatement, IEnumerable parameterCollection)
{
if (connection == null)
{
throw new ArgumentNullException("connection", "The implementing Connection object is null.");
}
if (string.IsNullOrEmpty(sqlStatement))
{
throw new ArgumentException("The DBMS SQL Statement was not specified.");
}
int i = 0;
using (IDbCommand cmd = connection.CreateCommand())
{
if (ambientTransaction != null)
{
cmd.Transaction = ambientTransaction;
}
cmd.CommandType = CommandType.Text;
cmd.CommandText = sqlStatement;
if (parameterCollection != null)
{
IDataParameter[] paramArray = CommonParameterUtility.GetParameters(cmd, parameterCollection);
foreach (IDataParameter p in paramArray)
{
cmd.Parameters.Add(p);
}
}
i = cmd.ExecuteNonQuery();
}
return(i);
}
