public AdomdDataReader ExecuteReader()
{
if (_command != null)
{
_command.Parameters.Clear();
foreach (AdomdParameter param in Parameters)
{
_command.Parameters.Add(new Microsoft.AnalysisServices.AdomdClient.AdomdParameter(param.Name, param.Value));
}
return(new AdomdDataReader(_command.ExecuteReader( )));
}
else
{
AdomdDataReader f()
{
_objExcel.Parameters.Clear();
foreach (AdomdParameter param in Parameters)
{
_objExcel.Parameters.Add(new ExcelAdomdClientReference::Microsoft.AnalysisServices.AdomdClient.AdomdParameter(param.Name, param.Value));
}
return(new AdomdDataReader(_objExcel.ExecuteReader()));
}
return(f());
}
}
public AdomdDataReader ExecuteReader()
{
if (_obj != null)
{
_obj.Parameters.Clear();
foreach (AdomdParameter param in _parameters)
{
_obj.Parameters.Add(new Microsoft.AnalysisServices.AdomdClient.AdomdParameter(param.Name, param.Value));
}
return(new AdomdDataReader(_obj.ExecuteReader( )));
}
else
{
ExcelAdoMdConnections.ReturnDelegate <AdomdDataReader> f = delegate
{
_objExcel.Parameters.Clear();
foreach (AdomdParameter param in _parameters)
{
_objExcel.Parameters.Add(new ExcelAdomdClientReference::Microsoft.AnalysisServices.AdomdClient.AdomdParameter(param.Name, param.Value));
}
return(new AdomdDataReader(_objExcel.ExecuteReader()));
};
return(f());
}
}
public void SimplePredictionQuery()
{
Microsoft.AnalysisServices.AdomdClient.AdomdConnection connection = new Microsoft.AnalysisServices.AdomdClient.AdomdConnection();
connection.ConnectionString =
"Data Source=localhost; Initial Catalog=Chapter 16";
connection.Open();
Microsoft.AnalysisServices.AdomdClient.AdomdCommand cmd = connection.CreateCommand();
cmd.CommandText =
"SELECT Predict(Generation) FROM [Generation Trees] " +
"NATURAL PREDICTION JOIN " +
"( SELECT " +
" (SELECT ’Cinemax’ AS Channel UNION " +
" SELECT ’Showtime’ AS Channel) AS PayChannels " +
") AS T ";
// execute the command and display the prediction result
Microsoft.AnalysisServices.AdomdClient.AdomdDataReader reader = cmd.ExecuteReader();
if (reader.Read())
{
string predictedGeneration = reader.GetValue(0).ToString();
Console.WriteLine(predictedGeneration);
}
reader.Close();
connection.Close();
}
/*
* Return mining results from query
*/
public Microsoft.AnalysisServices.AdomdClient.AdomdDataReader GetMiningResults(string sQuery)
{
try
{
string sConnString = "Data Source=" + sServer + "; Initial Catalog=" + sCatalog;
Microsoft.AnalysisServices.AdomdClient.AdomdConnection objConn = new Microsoft.AnalysisServices.AdomdClient.AdomdConnection(sConnString);
objConn.Open();
Microsoft.AnalysisServices.AdomdClient.AdomdCommand objCmd = objConn.CreateCommand();
objCmd.CommandText = sQuery;
/*
* "SELECT FLATTENED PredictHistogram(Generation) " +
* "FROM [Generation Trees] " +
* "NATURAL PREDICTION JOIN " +
* "( SELECT " +
* " (SELECT ’Cinemax’ AS Channel UNION " +
* " SELECT ’Showtime’ AS Channel) AS PayChannels " +
* ") AS T ";*/
//Microsoft.AnalysisServices.AdomdClient.AdomdDataReader objReader = objCmd.ExecuteReader();
//Microsoft.AnalysisServices.AdomdClient.AdomdDataAdapter objDataAdaptor = new Microsoft.AnalysisServices.AdomdClient.AdomdDataAdapter(objCmd);
Microsoft.AnalysisServices.AdomdClient.AdomdDataReader objDataReader = objCmd.ExecuteReader(CommandBehavior.CloseConnection);
/*
* try
* {
* for (int i = 0; i < objDataReader.FieldCount; i++)
* {
* Console.Write(objDataReader.GetName(i) + "\t");
* }
* Console.WriteLine();
* while (objDataReader.Read())
* {
* for (int i = 0; i < objDataReader.FieldCount; i++)
* {
* object value = objDataReader.GetValue(i);
* string strValue = (value == null) ?
* string.Empty : value.ToString();
* Console.Write(strValue + "\t");
* }
* Console.WriteLine();
* }
* }
* finally
* {
* objDataReader.Close();
* }
*/
return(objDataReader);
}
catch (Exception e)
{
Console.WriteLine(e.StackTrace);
}
return(null);
}
public void MultipleRowQuery(Microsoft.AnalysisServices.AdomdClient.AdomdConnection objConn)
{
Microsoft.AnalysisServices.AdomdClient.AdomdCommand cmd = objConn.CreateCommand();
cmd.CommandText =
"SELECT FLATTENED PredictHistogram(Generation) " +
"FROM [Generation Trees] " +
"NATURAL PREDICTION JOIN " +
"( SELECT " +
" (SELECT ’Cinemax’ AS Channel UNION " +
" SELECT ’Showtime’ AS Channel) AS PayChannels " +
") AS T ";
Microsoft.AnalysisServices.AdomdClient.AdomdDataReader reader = cmd.ExecuteReader();
try
{
for (int i = 0; i < reader.FieldCount; i++)
{
Console.Write(reader.GetName(i) + "\t");
}
Console.WriteLine();
while (reader.Read())
{
for (int i = 0; i < reader.FieldCount; i++)
{
object value = reader.GetValue(i);
string strValue = (value == null) ?
string.Empty : value.ToString();
Console.Write(strValue + "\t");
}
Console.WriteLine();
}
}
finally
{
reader.Close();
}
// Demo code
while (reader.Read())
{
for (int i = 0; i < reader.FieldCount; i++)
{
// Check for nested table columns
if (reader.GetFieldType(i) == typeof(Microsoft.AnalysisServices.AdomdClient.AdomdDataReader))
{
// fetch the nested data reader
Microsoft.AnalysisServices.AdomdClient.AdomdDataReader nestedReader = reader.GetDataReader(i);
while (nestedReader.Read())
{
for (int j = 0; j < nestedReader.FieldCount; j++)
{
object value = nestedReader.GetValue(j);
string strValue = (value == null) ?
string.Empty : value.ToString();
Console.Write(strValue);
}
Console.WriteLine();
}
// close the nested reader
nestedReader.Close();
}
}
}
cmd.CommandText =
"SELECT Predict(Generation) FROM [Generation Trees] " +
"NATURAL PREDICTION JOIN " +
"( SELECT " +
" (SELECT @Channel1 AS Channel UNION " +
" SELECT @Channel2 AS Channel) AS PayChannels " +
") AS T ";
Microsoft.AnalysisServices.AdomdClient.AdomdParameter p1 = new Microsoft.AnalysisServices.AdomdClient.AdomdParameter();
p1.ParameterName = "Channel1";
p1.Value = "Cinemax";
cmd.Parameters.Add(p1);
Microsoft.AnalysisServices.AdomdClient.AdomdParameter p2 = new Microsoft.AnalysisServices.AdomdClient.AdomdParameter();
p2.ParameterName = "Channel2";
p2.Value = "Showtime";
cmd.Parameters.Add(p2);
Microsoft.AnalysisServices.AdomdClient.AdomdCommand cmd2 = objConn.CreateCommand();
cmd2.CommandText =
"SELECT Predict(Generation) FROM [Generation Trees] " +
"NATURAL PREDICTION JOIN " +
"SHAPE { @CaseTable } " +
" APPEND( { @NestedTable } RELATE CustID TO CustID) " +
" AS PayChannels " +
"AS T ";
DataTable caseTable = new DataTable();
caseTable.Columns.Add("CustID", typeof(int));
caseTable.Rows.Add(0);
DataTable nestedTable = new DataTable();
nestedTable.Columns.Add("CustID", typeof(int));
nestedTable.Columns.Add("Channel", typeof(string));
nestedTable.Rows.Add(0, "Cinemax");
nestedTable.Rows.Add(0, "Showtime");
Microsoft.AnalysisServices.AdomdClient.AdomdParameter p3 = new Microsoft.AnalysisServices.AdomdClient.AdomdParameter();
p3.ParameterName = "CaseTable";
p3.Value = caseTable;
cmd.Parameters.Add(p3);
Microsoft.AnalysisServices.AdomdClient.AdomdParameter p4 = new Microsoft.AnalysisServices.AdomdClient.AdomdParameter();
p4.ParameterName = "NestedTable";
p4.Value = nestedTable;
cmd.Parameters.Add(p4);
// execute the command and display the prediction result
Microsoft.AnalysisServices.AdomdClient.AdomdDataReader reader2 = cmd.ExecuteReader();
if (reader2.Read())
{
string predictedGeneration = reader2.GetValue(0).ToString();
Console.WriteLine(predictedGeneration);
}
reader2.Close();
}
