protected override async Task <DbDataReader> ExecuteDbDataReaderAsync(System.Data.CommandBehavior behavior, System.Threading.CancellationToken cancellationToken)
{
return(await Task <DaxDataReader> .Factory.StartNew(() =>
{
return this.ExecuteDbDataReader(behavior) as DaxDataReader;
}));
}
/// <summary>
/// Overloaded. Sends the CommandText to the Connection and builds a VistaDBDataReader object, passing in CommandBehavior.
/// </summary>
public VistaDBDataReader ExecuteReader(System.Data.CommandBehavior behavior)
{
VistaDBSQLQuery query;
string s;
VistaDBConnection conn;
bool fillData;
s = commandText.TrimStart(' ');
s = (s.Substring(0, 6)).ToUpper();
if (s == "INSERT" || s == "UPDATE" || s == "DELETE")
{
int rowsAffected = ExecuteNonQuery();
return(new VistaDBDataReader(rowsAffected));
}
if (connection == null || connection.State != ConnectionState.Open)
{
throw new VistaDBException(VistaDBErrorCodes.ConnectionInvalid);
}
query = connection.VistaDBSQL.NewSQLQuery();
query.SQL = commandText;
AddSQLParameter(query);
query.Open();
conn = (int)(behavior & CommandBehavior.CloseConnection) != 0 ? this.connection: null;
fillData = ((int)(behavior & CommandBehavior.KeyInfo) == 0) && ((int)(behavior & CommandBehavior.SchemaOnly) == 0);
return(new VistaDBDataReader(query, fillData, conn));
}
public FileDirDataReader(System.Data.CommandBehavior behavior, FileDirConnection conn, FileDirCommand cmd)
{
_fdconn = conn;
_fdcmd = cmd;
_behavior = behavior;
_FilePattern = _fdcmd.FilePattern;
_DirectoryPattern = _fdcmd.DirectoryPattern;
_TrimEmpty = _fdcmd.TrimEmpty;
_Data = new object[_Names.Length]; // allocate enough room for data
if (behavior == CommandBehavior.SchemaOnly)
{
return;
}
string dir = _fdcmd.Directory;
if (dir == null)
{
throw new Exception("Directory parameter must be specified.");
}
// Populate the data array
_RowData = new ArrayList();
PopulateData(new DirectoryInfo(dir), -1);
_ie = _RowData.GetEnumerator();
}
public IDataReader ExecuteReader(System.Data.CommandBehavior behavior)
{
if (!(behavior == CommandBehavior.SingleResult ||
behavior == CommandBehavior.SchemaOnly))
{
throw new ArgumentException("ExecuteReader supports SingleResult and SchemaOnly only.");
}
foreach (DataParameter dp in _Parameters)
{
OracleParameter op = _cmd.CreateParameter();
op.ParameterName = dp.ParameterName;
if (_cmd.CommandType == CommandType.StoredProcedure &&
dp.ParameterName.ToLower().Contains("cursor"))
{
op.OracleDbType = OracleDbType.RefCursor;
op.Direction = ParameterDirection.Output;
}
else
{
op.Value = dp.Value;
}
_cmd.Parameters.Add(op);
}
return(_cmd.ExecuteReader(behavior));
}
/// <summary>
/// Executes a non-query.
/// </summary>
/// <param name="command"></param>
/// <param name="commandBehaviour"></param>
/// <param name="manageConnection"></param>
/// <returns></returns>
public static int ExecuteStoredNonQuery(this DbCommand command, System.Data.CommandBehavior commandBehaviour = System.Data.CommandBehavior.Default, bool manageConnection = true)
{
int numberOfRecordsAffected = -1;
using (command)
{
if (command.Connection.State == System.Data.ConnectionState.Closed)
{
command.Connection.Open();
}
try
{
numberOfRecordsAffected = command.ExecuteNonQuery();
}
finally
{
if (manageConnection)
{
command.Connection.Close();
}
}
}
return(numberOfRecordsAffected);
}
const int BYTES_FIELD = 9; // the bytes field
public LogDataReader(System.Data.CommandBehavior behavior, LogConnection conn, LogCommand cmd)
{
_lconn = conn;
_lcmd = cmd;
_behavior = behavior;
_CompressStrings = new Hashtable(10000); // compress strings to save memory
string fname = _lcmd.Url;
_Domain = _lcmd.Domain;
if (_Domain == null)
{
_Domain = "";
}
_IndexFile = _lcmd.IndexFile;
if (_IndexFile == null)
{
_IndexFile = "";
}
if (behavior != CommandBehavior.SchemaOnly)
{
_sr = new MultipleStreamReader(_lcmd.Url); // get the main stream
}
_Data = new object[_Names.Length]; // allocate enough room for data
}
/// <summary>
/// Executes a DbDataReader asynchronously and passes the results to <paramref name="handleResults"/>
/// </summary>
/// <param name="command"></param>
/// <param name="handleResults"></param>
/// <param name="commandBehaviour"></param>
/// <param name="ct"></param>
/// <param name="manageConnection"></param>
/// <returns></returns>
public static async Task ExecuteStoredProcAsync(this DbCommand command,
DbContext context,
Action <SprocResults> handleResults,
System.Data.CommandBehavior commandBehaviour = System.Data.CommandBehavior.Default,
CancellationToken ct = default, bool manageConnection = true)
{
if (handleResults == null)
{
throw new ArgumentNullException(nameof(handleResults));
}
using (command)
{
if (manageConnection && command.Connection.State == System.Data.ConnectionState.Closed)
{
await command.Connection.OpenAsync(ct).ConfigureAwait(false);
}
try
{
using (var reader = await command.ExecuteReaderAsync(commandBehaviour, ct)
.ConfigureAwait(false))
{
var sprocResults = new SprocResults(reader, context);
handleResults(sprocResults);
}
}
finally
{
if (manageConnection)
{
command.Connection.Close();
}
}
}
}
public IDataReader ExecuteReader(System.Data.CommandBehavior behavior)
{
if (!(behavior == CommandBehavior.SingleResult ||
behavior == CommandBehavior.SchemaOnly))
{
throw new ArgumentException("ExecuteReader supports SingleResult and SchemaOnly only.");
}
return(new XmlDataReader(behavior, _xc, this));
}
public System.Data.IDataReader ExecuteReader(DataCommandDefinition command, System.Data.CommandBehavior commandBehavior)
{
return(Connection.ExecuteReader(
new CommandDefinition(command.CommandText,
command.Parameters,
command.Transaction,
command.CommandTimeout,
command.CommandType,
ToCommandFlags(command.Flags)), commandBehavior));
}
ArrayList _Types; // types of the columns
public XmlDataReader(System.Data.CommandBehavior behavior, XmlConnection conn, XmlCommand cmd)
{
_xconn = conn;
_xcmd = cmd;
_behavior = behavior;
// create an iterator to the selected rows
_xpd = new XPathDocument(_xcmd.Url);
_xpn = _xpd.CreateNavigator();
_xpni = _xpn.Select(_xcmd.RowsXPath); // select the rows
_NameSpaces = new ListDictionary();
_Names = new ArrayList();
_Types = new ArrayList();
// Now determine the actual structure of the row depending on the command
if (_xcmd.ColumnsXPath != null)
{
ColumnsSpecifiedInit(); // xpaths to all columns specified
}
else
{
_xcmd.ColumnsXPath = new ArrayList(); // xpath of all columns will simply be the name
switch (_xcmd.Type)
{
case "both":
ColumnsAttributes();
ColumnsElements();
break;
case "attributes":
ColumnsAttributes();
break;
case "elements":
ColumnsElements();
break;
}
}
_Data = new object[_Names.Count]; // allocate enough room for data
if (_NameSpaces.Count > 0)
{
_nsmgr = new XmlNamespaceManager(new NameTable());
foreach (string nsprefix in _NameSpaces.Keys)
{
_nsmgr.AddNamespace(nsprefix, _NameSpaces[nsprefix] as string); // setup namespaces
}
}
else
{
_nsmgr = null;
}
}
/// <summary>
/// Executes a Transact-SQL statement against the connection and generate SQLExecutionEvent Event
/// </summary>
/// <param name="ExecuteString">Executes the Transact-SQL statement or stored procedure against the connection.</param>
/// <param name="behavior">One of the CommandBehavior values.</param>
public void ExecuteforEvent(string ExecuteString, System.Data.CommandBehavior behavior)
{
PrepareExecution(ExecuteString);
if (SQLExecutionEvent != null)
{
using (System.Data.SqlClient.SqlDataReader SqlRea = SqlCmd.ExecuteReader(behavior))
{
SQLExecutionEvent(SqlRea);
}
}
}
/// <summary>
///
/// </summary>
/// <param name="commandBehavior"></param>
/// <returns></returns>
public bool ExecuteReader(System.Data.CommandBehavior commandBehavior)
{
dataReader = command.ExecuteReader(commandBehavior);
result = new SqlCommand();
if (System.Data.CommandBehavior.SingleRow == commandBehavior)
{
return(dataReader.Read());
}
return(null != dataReader);
}
public void OpenReader(System.Data.CommandBehavior br)
{
if (cmd.Connection.State == ConnectionState.Closed)
{
cmd.Connection.Open();
}
else
{
}
_dr = cmd.ExecuteReader(br);
}
protected override DbDataReader ExecuteDbDataReader(System.Data.CommandBehavior behavior)
{
CheckCancel();
if (Fail)
{
throw new InvalidOperationException("Failure requested");
}
LastCommand = "ExecuteReader";
return(new MockDataReader()
{
Results = Results.GetEnumerator()
});
}
const int BYTES_FIELD=9; // the bytes field
public GedcomDataReader(System.Data.CommandBehavior behavior, GedcomConnection conn, GedcomCommand cmd)
{
_lconn = conn;
_lcmd = cmd;
_behavior = behavior;
string fname = _lcmd.Url;
if (behavior != CommandBehavior.SchemaOnly)
_sr = new MultipleStreamReader(_lcmd.Url); // get the main stream
_Data = new object[_Names.Length]; // allocate enough room for data
}
const int BYTES_FIELD = 9; // the bytes field
public GedcomDataReader(System.Data.CommandBehavior behavior, GedcomConnection conn, GedcomCommand cmd)
{
_lconn = conn;
_lcmd = cmd;
_behavior = behavior;
string fname = _lcmd.Url;
if (behavior != CommandBehavior.SchemaOnly)
{
_sr = new MultipleStreamReader(_lcmd.Url); // get the main stream
}
_Data = new object[_Names.Length]; // allocate enough room for data
}
public DbDataReader ExecReader(string sql, List <ParamInfo> paramInfos, System.Data.CommandBehavior cmdBehavior)
{
SQLiteDataReader reader = null;
if (string.IsNullOrEmpty(sql))
{
return(reader);
}
using (SQLiteCommand cmd = new SQLiteCommand())
{
cmd.CommandType = System.Data.CommandType.Text;
cmd.CommandText = sql;
if (paramInfos != null)
{
foreach (ParamInfo paramInfo in paramInfos)
{
SQLiteParameter param = new SQLiteParameter();
param.ParameterName = ParamPreffix + paramInfo.Name;
param.Value = paramInfo.Value;
if (paramInfo.DBType.HasValue)
{
param.DbType = paramInfo.DBType.Value;
}
cmd.Parameters.Add(param);
}
}
cmd.Connection = m_Conn;
if (m_Conn.State != ConnectionState.Open)
{
m_Conn.Open();
}
try
{
reader = cmd.ExecuteReader(cmdBehavior);
}
catch (Exception ex)
{
Logger.WriteEx2LogFile(ex);
if (reader != null && !reader.IsClosed)
{
reader.Close();
reader = null;
}
}
return(reader);
}
}
public static SQLiteDataReader DoQuery_Read(string sql, System.Data.CommandBehavior behaviour = System.Data.CommandBehavior.Default)
{
SQLiteDataReader dataReader = null;
//try
//{
SQLiteCommand command = new SQLiteCommand(sql, databaseConection);
dataReader = command.ExecuteReader(behaviour);
//}
//catch (Exception e)
//{
// throw e;
//}
return(dataReader);
}
XPathNodeIterator _xpni; // the main iterator
#endregion Fields
#region Constructors
public XmlDataReader(System.Data.CommandBehavior behavior, XmlConnection conn, XmlCommand cmd)
{
_xconn = conn;
_xcmd = cmd;
_behavior = behavior;
// create an iterator to the selected rows
_xpd = new XPathDocument (_xcmd.Url);
_xpn = _xpd.CreateNavigator();
_xpni = _xpn.Select(_xcmd.RowsXPath); // select the rows
_NameSpaces = new ListDictionary();
_Names = new ArrayList();
_Types = new ArrayList();
// Now determine the actual structure of the row depending on the command
if (_xcmd.ColumnsXPath != null)
ColumnsSpecifiedInit(); // xpaths to all columns specified
else
{
_xcmd.ColumnsXPath = new ArrayList(); // xpath of all columns will simply be the name
switch (_xcmd.Type)
{
case "both":
ColumnsAttributes();
ColumnsElements();
break;
case "attributes":
ColumnsAttributes();
break;
case "elements":
ColumnsElements();
break;
}
}
_Data = new object[_Names.Count]; // allocate enough room for data
if (_NameSpaces.Count > 0)
{
_nsmgr = new XmlNamespaceManager(new NameTable());
foreach (string nsprefix in _NameSpaces.Keys)
{
_nsmgr.AddNamespace(nsprefix, _NameSpaces[nsprefix] as string); // setup namespaces
}
}
else
_nsmgr = null;
}
protected virtual CommandBehavior SQLCommandBehaviorToCommandBehavior(SQLCommandBehavior commandBehavior)
{
System.Data.CommandBehavior behavior = System.Data.CommandBehavior.Default | System.Data.CommandBehavior.SingleResult;
if ((commandBehavior & SQLCommandBehavior.KeyInfo) != 0)
{
behavior |= System.Data.CommandBehavior.KeyInfo;
}
if ((commandBehavior & SQLCommandBehavior.SchemaOnly) != 0)
{
behavior |= System.Data.CommandBehavior.SchemaOnly;
}
return(behavior);
}
protected override DbDataReader ExecuteDbDataReader(System.Data.CommandBehavior behavior)
{
List <DbCommand> statements = splitStatements();
if (statements.Count == 0)
{
throw new NuoDbSqlException("No statement specified");
}
for (int i = 0; i < statements.Count - 1; i++)
{
statements[i].ExecuteNonQuery();
}
if (ExpectedColumnTypes != null)
{
return(new TypedDbReader(statements[statements.Count - 1].ExecuteReader(), ExpectedColumnTypes));
}
return(statements[statements.Count - 1].ExecuteReader());
}
public WebServiceDataReader(System.Data.CommandBehavior behavior, WebServiceConnection conn, WebServiceCommand cmd)
{
_wsconn = conn;
_wscmd = cmd;
_behavior = behavior;
WebServiceWsdl wsw = WebServiceWsdl.GetWebServiceWsdl(_wscmd.Url);
// build the structure of the result
BuildMetaData(wsw);
if (_behavior == CommandBehavior.SchemaOnly)
return;
// build the array that will hold the data
BuildData(wsw);
return;
}
const int BYTES_FIELD=9; // the bytes field
public LogDataReader(System.Data.CommandBehavior behavior, LogConnection conn, LogCommand cmd)
{
_lconn = conn;
_lcmd = cmd;
_behavior = behavior;
_CompressStrings = new Hashtable(10000); // compress strings to save memory
string fname = _lcmd.Url;
_Domain = _lcmd.Domain;
if (_Domain == null)
_Domain = "";
_IndexFile = _lcmd.IndexFile;
if (_IndexFile == null)
_IndexFile = "";
if (behavior != CommandBehavior.SchemaOnly)
_sr = new MultipleStreamReader(_lcmd.Url); // get the main stream
_Data = new object[_Names.Length]; // allocate enough room for data
}
protected override DbDataReader ExecuteDbDataReader(System.Data.CommandBehavior behavior)
{
try
{
if (this.Connection.State == ConnectionState.Open)
{
Prepare();
return(_exec.ExecuteDataReader(this));
}
else
{
throw new InvalidOperationException(MockDBErrors.ConnectionStateNotOpen);
}
}
catch (Exception ex)
{
throw new MockDBException(ex.Message, ex);
}
}
ArrayList _Types; // types of the columns
public WebServiceDataReader(System.Data.CommandBehavior behavior, WebServiceConnection conn, WebServiceCommand cmd)
{
_wsconn = conn;
_wscmd = cmd;
_behavior = behavior;
WebServiceWsdl wsw = WebServiceWsdl.GetWebServiceWsdl(_wscmd.Url);
// build the structure of the result
BuildMetaData(wsw);
if (_behavior == CommandBehavior.SchemaOnly)
{
return;
}
// build the array that will hold the data
BuildData(wsw);
return;
}
public iTunesDataReader(System.Data.CommandBehavior behavior, iTunesConnection conn, iTunesCommand cmd)
{
_xconn = conn;
_xcmd = cmd;
_behavior = behavior;
_Data = new object[_Names.Length]; // allocate enough room for data
if (behavior == CommandBehavior.SchemaOnly)
{
return;
}
// create an iterator to the selected rows
_xpd = new XPathDocument(_xconn.File);
_xpn = _xpd.CreateNavigator();
_xpni = _xpn.Select("/plist/dict"); // select the rows
_NameSpaces = new ListDictionary();
// Now determine the actual structure of the row depending on the command
switch (_xcmd.Table)
{
case "Tracks":
default:
_xpni = GetTracksColumns();
break;
}
if (_NameSpaces.Count > 0)
{
_nsmgr = new XmlNamespaceManager(new NameTable());
foreach (string nsprefix in _NameSpaces.Keys)
{
_nsmgr.AddNamespace(nsprefix, _NameSpaces[nsprefix] as string); // setup namespaces
}
}
else
{
_nsmgr = null;
}
}
/*
* Because the user should not be able to directly create a
* DataReader object, the constructors are
* marked as internal.
*/
internal VirtuosoDataReader(
VirtuosoConnection connection,
IInnerCommand innerCommand,
VirtuosoCommand command,
CommandBehavior commandBehavior,
bool schemaOnly)
{
Debug.WriteLineIf(CLI.FnTrace.Enabled, "VirtuosoDataReader.ctor()");
Debug.Assert(connection != null);
Debug.Assert(innerCommand != null);
this.connection = connection;
this.command = command;
this.innerCommand = innerCommand;
this.commandBehavior = commandBehavior;
InitializeResultInfo(schemaOnly);
if (schemaOnly)
{
over = true;
last = true;
}
}
public FileDirDataReader(System.Data.CommandBehavior behavior, FileDirConnection conn, FileDirCommand cmd)
{
_fdconn = conn;
_fdcmd = cmd;
_behavior = behavior;
_FilePattern = _fdcmd.FilePattern;
_DirectoryPattern = _fdcmd.DirectoryPattern;
_TrimEmpty = _fdcmd.TrimEmpty;
_Data = new object[_Names.Length]; // allocate enough room for data
if (behavior == CommandBehavior.SchemaOnly)
return;
string dir = _fdcmd.Directory;
if (dir == null)
throw new Exception("Directory parameter must be specified.");
// Populate the data array
_RowData = new ArrayList();
PopulateData(new DirectoryInfo(dir), -1);
_ie = _RowData.GetEnumerator();
}
/// <summary>
/// Executes a Transact-SQL statement against the connection and returns a stream of (reading & forward-only) rows from a SQL Server database.
/// </summary>
/// <param name="ExecuteString">Executes the Transact-SQL statement or stored procedure against the connection.</param>
/// <param name="behavior">One of the CommandBehavior values.</param>
/// <returns>A SqlDataReader object.</returns>
public System.Data.SqlClient.SqlDataReader ExecuteReader(string ExecuteString, System.Data.CommandBehavior behavior)
{
try
{
PrepareExecution(ExecuteString);
return(SqlCmd.ExecuteReader(behavior));
}
catch (Exception ex)
{
//StreamWriter sw = new StreamWriter(HttpContext.Current.Server.MapPath("") + @"/Log/Log.txt", true);
//sw.WriteLine(DateTime.Now.ToString() + "/" + SqlCmd.CommandText + "/" + SqlCmd.Connection.ConnectionString + "/" + ex + " => Error Occured");
//sw.Flush();
//sw.Close();
return(null);
}
}
/// <summary>
/// Executes a Transact-SQL statement against the connection and returns a stream of (reading & forward-only) rows from a SQL Server database.
/// </summary>
/// <param name="ExecuteString">Executes the Transact-SQL statement or stored procedure against the connection.</param>
/// <param name="behavior">One of the CommandBehavior values.</param>
/// <returns>A SqlDataReader object.</returns>
public System.Data.SqlClient.SqlDataReader ExecuteReader(string ExecuteString, System.Data.CommandBehavior behavior)
{
PrepareExecution(ExecuteString);
return(SqlCmd.ExecuteReader(behavior));
}
/*
* Because the user should not be able to directly create a
* DataReader object, the constructors are
* marked as internal.
*/
internal VirtuosoDataReader (
VirtuosoConnection connection,
IInnerCommand innerCommand,
VirtuosoCommand command,
CommandBehavior commandBehavior,
bool schemaOnly)
{
Debug.WriteLineIf (CLI.FnTrace.Enabled, "VirtuosoDataReader.ctor()");
Debug.Assert (connection != null);
Debug.Assert (innerCommand != null);
this.connection = connection;
this.command = command;
this.innerCommand = innerCommand;
this.commandBehavior = commandBehavior;
InitializeResultInfo (schemaOnly);
if (schemaOnly)
{
over = true;
last = true;
}
}
Type[] _Types; // types of the columns
public TxtDataReader(System.Data.CommandBehavior behavior, TxtConnection conn, TxtCommand cmd)
{
bFirstRow = false;
_tconn = conn;
_tcmd = cmd;
_behavior = behavior;
string fname = _tcmd.Url;
bool header = _tcmd.Header;
char separator = _tcmd.Separator;
_sr = GetStream(); // get the main stream
Type tstring = "".GetType();
LexTokenList ll = GetLine();
int colcount = ll == null? 0: ll.Count - 1; // don't count the end of line
_Names = _tcmd.Columns;
if (colcount == 0)
{
_sr.Close();
_sr = null;
if (_Names == null)
{
return;
}
_Types = new Type[_Names.Length];
for (int ci = 0; ci < _Types.Length; ci++)
{
_Types[ci] = tstring;
}
return;
}
if (_Names != null && _Names.Length != colcount)
{
throw new Exception(string.Format("{0} column names specified but {1} columns found.", _Names.Length, colcount));
}
if (header)
{
if (_Names == null)
{ // uses the first row as the names of the columns
_Names = new string[colcount];
int ci = 0;
foreach (LexToken lt in ll)
{
if (lt.Type == LexTokenTypes.EOF)
{
break;
}
_Names[ci++] = lt.Value;
}
}
ll = GetLine();
}
else if (_Names == null)
{ // just name the columns 'column1', 'column2', ...
_Names = new string[colcount];
for (int ci = 0; ci < _Names.Length; ci++)
{
_Names[ci] = "column" + (ci + 1).ToString();
}
}
_Data = new object[_Names.Length]; // allocate enough room for data
_Types = new Type[_Names.Length];
if (ll != null) // we have a datarow
{
bFirstRow = true;
// loop thru determining the types of all data
int ci = 0;
foreach (LexToken lt in ll)
{
if (ci >= _Types.Length || lt.Type == LexTokenTypes.EOF)
{
break;
}
_Types[ci++] = GetTypeOfString(lt.Value);
}
FillData(ll);
}
else
{ // no first row! assume all the column types are string
for (int ci = 0; ci < _Types.Length; ci++)
{
_Types[ci] = tstring;
}
}
if (behavior == CommandBehavior.SchemaOnly)
{
_sr.Close();
_sr = null;
}
}
/// <summary>
/// Executes a DbDataReader and returns a list of mapped column values to the properties of <typeparamref name="T"/>
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="command"></param>
/// <returns></returns>
public static void ExecuteStoredProc(this DbCommand command, Action <SprocResults> handleResults, System.Data.CommandBehavior commandBehaviour = System.Data.CommandBehavior.Default)
{
if (handleResults == null)
{
throw new ArgumentNullException(nameof(handleResults));
}
using (command)
{
if (command.Connection.State == ConnectionState.Closed)
{
command.Connection.Open();
}
try
{
using (var reader = command.ExecuteReader(commandBehaviour))
{
var sprocResults = new SprocResults(reader);
// return new SprocResults();
handleResults(sprocResults);
}
}
finally
{
command.Connection.Close();
}
}
}
protected override DbDataReader ExecuteDbDataReader(System.Data.CommandBehavior behavior)
{
return(new OracleDataReader(cmd.ExecuteReader(behavior)));
}
Type[] _Types; // types of the columns
public TxtDataReader(System.Data.CommandBehavior behavior, TxtConnection conn, TxtCommand cmd)
{
bFirstRow=false;
_tconn = conn;
_tcmd = cmd;
_behavior = behavior;
string fname = _tcmd.Url;
bool header = _tcmd.Header;
char separator = _tcmd.Separator;
_sr = GetStream(); // get the main stream
Type tstring = "".GetType();
LexTokenList ll = GetLine();
int colcount = ll==null? 0: ll.Count - 1; // don't count the end of line
_Names = _tcmd.Columns;
if (colcount == 0)
{
_sr.Close();
_sr = null;
if (_Names == null)
return;
_Types = new Type[_Names.Length];
for (int ci=0; ci < _Types.Length; ci++)
_Types[ci] = tstring;
return;
}
if (_Names != null && _Names.Length != colcount)
throw new Exception(string.Format("{0} column names specified but {1} columns found.", _Names.Length, colcount));
if (header)
{
if (_Names == null)
{ // uses the first row as the names of the columns
_Names = new string[colcount];
int ci=0;
foreach (LexToken lt in ll)
{
if (lt.Type == LexTokenTypes.EOF)
break;
_Names[ci++] = lt.Value;
}
}
ll = GetLine();
}
else if (_Names == null)
{ // just name the columns 'column1', 'column2', ...
_Names = new string[colcount];
for (int ci =0; ci < _Names.Length; ci++)
_Names[ci] = "column" + (ci+1).ToString();
}
_Data = new object[_Names.Length]; // allocate enough room for data
_Types = new Type[_Names.Length];
if (ll != null) // we have a datarow
{
bFirstRow = true;
// loop thru determining the types of all data
int ci=0;
foreach (LexToken lt in ll)
{
if (ci >= _Types.Length || lt.Type == LexTokenTypes.EOF)
break;
_Types[ci++] = GetTypeOfString(lt.Value);
}
FillData(ll);
}
else
{ // no first row! assume all the column types are string
for (int ci =0; ci < _Types.Length; ci++)
_Types[ci] = tstring;
}
if (behavior == CommandBehavior.SchemaOnly)
{
_sr.Close();
_sr = null;
}
}
protected override DbDataReader ExecuteDbDataReader(System.Data.CommandBehavior behavior)
{
return(new DaxDataReader(this._command.ExecuteReader(behavior)));
}
public iTunesDataReader(System.Data.CommandBehavior behavior, iTunesConnection conn, iTunesCommand cmd)
{
_xconn = conn;
_xcmd = cmd;
_behavior = behavior;
_Data = new object[_Names.Length]; // allocate enough room for data
if (behavior == CommandBehavior.SchemaOnly)
return;
// create an iterator to the selected rows
_xpd = new XPathDocument(_xconn.File);
_xpn = _xpd.CreateNavigator();
_xpni = _xpn.Select("/plist/dict"); // select the rows
_NameSpaces = new ListDictionary();
// Now determine the actual structure of the row depending on the command
switch (_xcmd.Table)
{
case "Tracks":
default:
_xpni = GetTracksColumns();
break;
}
if (_NameSpaces.Count > 0)
{
_nsmgr = new XmlNamespaceManager(new NameTable());
foreach (string nsprefix in _NameSpaces.Keys)
{
_nsmgr.AddNamespace(nsprefix, _NameSpaces[nsprefix] as string); // setup namespaces
}
}
else
_nsmgr = null;
}
protected override DbDataReader ExecuteDbDataReader(System.Data.CommandBehavior behavior)
{
throw new NotImplementedException();
}
