/// <summary>
/// Processes a SqlDataReader calling the processRow delegate for each row.
/// </summary>
/// <param name="cmd"></param>
/// <param name="processRow">void ProcessDataRow(SqlDataReader dr)</param>
public void ExecuteDataReader(SqlCommand cmd, ProcessRowDelegate processRow)
{
ExecuteCommand(cmd, () =>
{
var dr = cmd.ExecuteReader();
while (dr.Read())
{
processRow(dr);
}
});
}
/// <summary>
/// Executes a command and returns the first row as the given object. The class must have a default constructor.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="cmd"></param>
/// <param name="process">If not set, sets properties based on the field name returned from the command.</param>
/// <returns></returns>
public T GetObject <T>(SqlCommand cmd, ProcessRowDelegate <T> process = null) where T : class
{
if (process == null)
{
process = new ProcessRowDelegate <T>(ProcessRow <T>);
}
T obj = null;
ExecuteDataReader(cmd, (row) => { obj = process(row); return(false); });
return(obj);
}
/** Reads the table's rows. */
public void Read(ProcessRowDelegate processRowDelegate)
{
while (true)
{
string[] columns = ReadNextRow();
if (columns != null)
{
processRowDelegate(columns);
}
else
{
break;
}
}
;
}
/// <summary>
/// Executes a command and returns the rows as an array of objects. The class must have a default constructor.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="cmd"></param>
/// <param name="process">If not set, sets properties based on the field name returned from the command.</param>
/// <returns></returns>
public T[] GetObjects <T>(SqlCommand cmd, ProcessRowDelegate <T> process = null) where T : class
{
if (process == null)
{
process = new ProcessRowDelegate <T>(ProcessRow <T>);
}
var objs = new List <T>();
ExecuteDataReader(cmd, (row) =>
{
var obj = process(row);
if (obj != null)
{
objs.Add(obj);
}
return(true);
});
return(objs.ToArray());
}
