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Introduction to Creating Dynamic Types with Reflection.Emit: Part 2

, 1 May 2006
Part 2 of an introduction to creating dynamic types. This article shows how to actually generate the methods in a dynamic type and how to call them.
using System;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using DotNetPerformance;
using DotNetPerformance.ResultOutput;

namespace Johns_Perf_Testing
{
	/// <summary>
	/// Summary description for DataSetTest.
	/// </summary>
	public class DataSetTest
	{
		[Benchmark("Test different ways to initialize a class")]
		public TestResultGrp RunTest() 
		{
			const int iterations = 20000;
			const int runs = 5;

			TestRunner tr = new TestRunner(iterations, runs);
			
			TestRunner.TestCase testCases = null;

			testCases += new TestRunner.TestCase(this.DataSetToString);
			testCases += new TestRunner.TestCase(this.DataSetCast);

			return tr.RunTests(testCases);
		}

		public TestResultGrp DataSet_VS_DataReader_Test()
		{
			const int iterations = 1000;
			const int runs = 5;

			TestRunner tr = new TestRunner(iterations, runs);
			
			TestRunner.TestCase testCases = null;

			testCases += new TestRunner.TestCase(this.GetDataSet);
			testCases += new TestRunner.TestCase(this.GetDataReader);

			return tr.RunTests(testCases);
		}

		public TestResultGrp DBNullTest()
		{
			const int iterations = 10000;
			const int runs = 5;

			TestRunner tr = new TestRunner(iterations, runs);
			
			TestRunner.TestCase testCases = null;

			testCases += new TestRunner.TestCase(this.GetDataWithDBNull);
			testCases += new TestRunner.TestCase(this.GetDataWithOutDBNull);

			return tr.RunTests(testCases);
		}

		public TestResultGrp OrdinalTest()
		{
			const int iterations = 10000;
			const int runs = 5;

			TestRunner tr = new TestRunner(iterations, runs);
			
			TestRunner.TestCase testCases = null;

			testCases += new TestRunner.TestCase(this.IntOrdinal);
			testCases += new TestRunner.TestCase(this.StringOrdinal);

			return tr.RunTests(testCases);
		}

		private DataSet data;

		public DataSetTest()
		{
			try
			{
				SqlConnection con = new SqlConnection("Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=PerfTesting;Data Source=Rainer");			
				con.Open();
				SqlDataAdapter adp = new SqlDataAdapter("select * from TestTable", con);
				data = new DataSet();
				adp.Fill(data);
				con.Close();
			}
			catch (SqlException ex)
			{
				MessageBox.Show(ex.Message + Environment.NewLine + ex.StackTrace);
				throw;
			}
		}		

		#region Test Cases
		private void DataSetToString(int iterations)
		{
			string one, two;
			int three, four;
			decimal five, six;

			for (int i = 0; i < iterations; i++)
			{
				foreach (DataRow row in data.Tables[0].Rows)
				{
					one = (string)row["string1"];
					two = (string)row["string2"];
					three = (int)row["int1"];
					four = (int)row["int2"];
					five = (decimal)row["decimal1"];
					six = (decimal)row["decimal2"];
				}
			}			
		}

		private void DataSetCast(int iterations)
		{			
			string one, two;
			int three, four;
			decimal five, six;

			for (int i = 0; i < iterations; i++)
			{
				foreach (DataRow row in data.Tables[0].Rows)
				{
					one = row["string1"].ToString();
					two = row["string2"].ToString();
					three = int.Parse(row["int1"].ToString());
					four = int.Parse(row["int2"].ToString());
					five = decimal.Parse(row["decimal1"].ToString());
					six = decimal.Parse(row["decimal2"].ToString());
				}
			}					
		}
		#endregion

		#region Test Case Dataset vs DataReader
		private void GetDataSet(int iterations)
		{
			for (int i = 0; i < iterations; i++)
			{
				SqlConnection con = new SqlConnection("Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=PerfTesting;Data Source=Rainer");							
				SqlDataAdapter adp = new SqlDataAdapter("select * from TestTable", con);
				con.Open();
				data = new DataSet();
				adp.Fill(data);
				con.Close();

				foreach (DataRow row in data.Tables[0].Rows)
				{
					string temp;
				
					temp = row[0].ToString();
					temp = row[1].ToString();
					temp = row[2].ToString();
					temp = row[3].ToString();
					temp = row[4].ToString();
					temp = row[5].ToString();
					temp = row[6].ToString();
					temp = row[7].ToString();
					temp = row[8].ToString();
					temp = row[9].ToString();
					temp = row[10].ToString();
					temp = row[11].ToString();
					temp = row[12].ToString();
					temp = row[13].ToString();
					temp = row[14].ToString();
					temp = row[15].ToString();
					temp = row[16].ToString();
					temp = row[17].ToString();
					temp = row[18].ToString();
					temp = row[19].ToString();
					temp = row[20].ToString();
					temp = row[21].ToString();
					temp = row[22].ToString();
					temp = row[23].ToString();
					temp = row[24].ToString();
					temp = row[25].ToString();					
				}
			}	
		}

		private void GetDataReader(int iterations)
		{
			for (int i = 0; i < iterations; i++)
			{
				SqlConnection con = new SqlConnection("Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=PerfTesting;Data Source=Rainer");
				SqlCommand cmd = new SqlCommand("select * from TestTable", con);
				con.Open();
				SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);								

				while (reader.Read())
				{
					string temp;
				
					temp = reader[0].ToString();
					temp = reader[1].ToString();
					temp = reader[2].ToString();
					temp = reader[3].ToString();
					temp = reader[4].ToString();
					temp = reader[5].ToString();
					temp = reader[6].ToString();
					temp = reader[7].ToString();
					temp = reader[8].ToString();
					temp = reader[9].ToString();
					temp = reader[10].ToString();
					temp = reader[11].ToString();
					temp = reader[12].ToString();
					temp = reader[13].ToString();
					temp = reader[14].ToString();
					temp = reader[15].ToString();
					temp = reader[16].ToString();
					temp = reader[17].ToString();
					temp = reader[18].ToString();
					temp = reader[19].ToString();
					temp = reader[20].ToString();
					temp = reader[21].ToString();
					temp = reader[22].ToString();
					temp = reader[23].ToString();
					temp = reader[24].ToString();
					temp = reader[25].ToString();					
				}

				reader.Close();				
			}	
		}
		#endregion Test Case DataSet vs DataReader

		#region Test Case DataReader vs DataReader with db null check
		private void GetDataWithDBNull(int iterations)
		{
			for (int i = 0; i < iterations; i++)
			{
				SqlConnection con = new SqlConnection("Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=PerfTestDB;Data Source=w2sis-eco928");
				SqlCommand cmd = new SqlCommand("select * from TestTable", con);
				con.Open();
				SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);								

				while (reader.Read())
				{
					string tempS;
					int tempI;
					decimal tempD;

					tempS = reader["string1"] == DBNull.Value ? "" :  reader["string1"].ToString();
					tempS = reader["string2"] == DBNull.Value ? "" :  reader["string2"].ToString();
					tempI = reader["int1"] == DBNull.Value ? 0 : (int)reader["int1"];
					tempI = reader["int2"] == DBNull.Value ? 0 : (int)reader["int2"];
					tempD = reader["decimal1"] == DBNull.Value ? 0 : (decimal)reader["decimal1"];
					tempD = reader["decimal2"] == DBNull.Value ? 0 : (decimal)reader["decimal2"];
				}

				reader.Close();				
			}	
		}

		private void GetDataWithOutDBNull(int iterations)
		{
			for (int i = 0; i < iterations; i++)
			{
				SqlConnection con = new SqlConnection("Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=PerfTestDB;Data Source=w2sis-eco928");
				SqlCommand cmd = new SqlCommand("select * from TestTable", con);
				con.Open();
				SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);								

				while (reader.Read())
				{
					string tempS;
					int tempI;
					decimal tempD;

					tempS = reader["string1"].ToString();
					tempS = reader["string2"].ToString();
					tempI = (int)reader["int1"];
					tempI = (int)reader["int2"];
					tempD = (decimal)reader["decimal1"];
					tempD = (decimal)reader["decimal2"];
				}

				reader.Close();				
			}	
		}
		#endregion Test Case DataSet vs DataReader

		
		#region Test Case String Ordinal vs Int Ordinal with db null check
		private void StringOrdinal(int iterations)
		{
			for (int i = 0; i < iterations; i++)
			{
				SqlConnection con = new SqlConnection("Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=PerfTestDB;Data Source=w2sis-eco928");
				SqlCommand cmd = new SqlCommand("select * from TestTable", con);
				con.Open();
				SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);								

				while (reader.Read())
				{
					string tempS;
					int tempI;
					decimal tempD;

					tempS = reader["string1"].ToString();
					tempS = reader["string2"].ToString();
					tempI = (int)reader["int1"];
					tempI = (int)reader["int2"];
					tempD = (decimal)reader["decimal1"];
					tempD = (decimal)reader["decimal2"];
				}

				reader.Close();				
			}	
		}

		private void IntOrdinal(int iterations)
		{
			for (int i = 0; i < iterations; i++)
			{
				SqlConnection con = new SqlConnection("Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=PerfTestDB;Data Source=w2sis-eco928");
				SqlCommand cmd = new SqlCommand("select * from TestTable", con);
				con.Open();
				SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);								

				while (reader.Read())
				{
					string tempS;
					int tempI;
					decimal tempD;

					tempS = (string)reader[0];
					tempS = (string)reader[1];
					tempI = (int)reader[2];
					tempI = (int)reader[3];
					tempD = (decimal)reader[4];
					tempD = (decimal)reader[5];
				}

				reader.Close();				
			}	
		}
		#endregion Test Case DataSet vs DataReader

	}
}

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jconwell

United States United States
I have been a professional developer since 1996. My experience comes from many different industries; Data Mining Software, Consulting, E-Commerce, Wholesale Operations, Clinical Software, Insurance, Energy.
 
I started programming in the military, trying to find better ways to analyze database data, eventually automating my entire job. Later, in college, I automated my way out of another job. This gave me the great idea to switch majors to the only thing that seemed natural…Programming!
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