Csharp/C Sharp/Database ADO.net/Create table

Create table through SqlConnection

using System;
using System.Data;
using System.Data.SqlClient;
   class CommandExampleCreateDb
   {
      static void Main() 
      {
         SqlConnection thisConnection = new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI");
         SqlCommand nonqueryCommand = thisConnection.CreateCommand();
         try 
         {
            thisConnection.Open();
            nonqueryCommand.rumandText = "CREATE DATABASE MyDb";
            Console.WriteLine(nonqueryCommand.rumandText);
            nonqueryCommand.ExecuteNonQuery();
            Console.WriteLine("Database created, now switching");
            thisConnection.ChangeDatabase("MyDb");
            nonqueryCommand.rumandText = "CREATE TABLE MynfexTable (COL1 integer)";
            Console.WriteLine(nonqueryCommand.rumandText);
            Console.WriteLine("Number of Rows Affected is: {0}", nonqueryCommand.ExecuteNonQuery());
            nonqueryCommand.rumandText = "INSERT INTO MynfexTable VALUES (99)";
            Console.WriteLine(nonqueryCommand.rumandText);
            Console.WriteLine("Number of Rows Affected is: {0}", nonqueryCommand.ExecuteNonQuery());
         
         } catch (SqlException ex) {
         
            Console.WriteLine(ex.ToString());
         
         } finally {  
         
            thisConnection.Close();
            Console.WriteLine("Connection Closed.");
         
         }
      }
   }

Use ExecuteNonQuery() to run DDL statements: create table

 
using System;
using System.Data;
using System.Data.SqlClient;
class ExecuteDDL {
    public static void Main() {
        SqlConnection mySqlConnection = new SqlConnection("server=localhost;database=Northwind;uid=sa;pwd=sa");
        SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
        mySqlCommand.rumandText =
          "CREATE TABLE MyPersons (" +
          "  PersonID int CONSTRAINT PK_Persons PRIMARY KEY," +
          "  FirstName nvarchar(15) NOT NULL," +
          "  LastName nvarchar(15) NOT NULL," +
          "  DateOfBirth datetime" +
          ")";
        mySqlConnection.Open();
        Console.WriteLine("Creating MyPersons table");
        int result = mySqlCommand.ExecuteNonQuery();
        Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);
        mySqlCommand.rumandText =
          "ALTER TABLE MyPersons " +
          "ADD EmployerID nchar(5) CONSTRAINT FK_Persons_Customers " +
          "REFERENCES Customers(CustomerID)";
        result = mySqlCommand.ExecuteNonQuery();
        Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);
        mySqlCommand.rumandText = "DROP TABLE MyPersons";
        result = mySqlCommand.ExecuteNonQuery();
        Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);
        mySqlConnection.Close();
    }
}

use the ExecuteNonQuery() method to run DDL statements

using System;
using System.Data;
using System.Data.SqlClient;
class ExecuteDDL
{
  public static void Main()
  {
    SqlConnection mySqlConnection =new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");
    SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
    mySqlCommand.rumandText =
      "CREATE TABLE MyEmployee (" +
      "  ID int CONSTRAINT PK_Persons PRIMARY KEY," +
      "  FirstName nvarchar(15) NOT NULL," +
      "  LastName nvarchar(15) NOT NULL," +
      "  DateOfBirth datetime" +
      ")";
    mySqlConnection.Open();
    Console.WriteLine("Creating MyEmployee table");
    int result = mySqlCommand.ExecuteNonQuery();
    Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);
    mySqlCommand.rumandText =
      "ALTER TABLE MyEmployee " +
      "ADD EmployerID nchar(5) CONSTRAINT FK_Persons_Customers " +
      "REFERENCES Employee(ID)";
    Console.WriteLine("Altering MyEmployee table");
    result = mySqlCommand.ExecuteNonQuery();
    Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);
    mySqlCommand.rumandText = "DROP TABLE MyEmployee";
    Console.WriteLine("Dropping MyEmployee table");
    result = mySqlCommand.ExecuteNonQuery();
    Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);
    mySqlConnection.Close();
  }
}