SQL c# insert Command doesn't work

Question

I'm having a problem insertin data into my database. I can read from the database by using the select query, so I know my connection string is correct, but for some reason the insert doesn't work. Here's my code:

private string ConnectionString()
{
    return @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\App_Data\dbBusiness.mdf;Integrated Security=True;User Instance=True";
}
private void Insert()
{
   try{
        string sqlStrInsert = "INSERT INTO myTable ([param1],[param2])VALUES(@param1,@param2)";
        SqlConnection connection = new SqlConnection(ConnectionString());
        SqlCommand command = new SqlCommand(sqlStrInsert, connection);
        command.Parameters.Add("@param1", SqlDbType.SmallInt);
        command.Parameters.Add("@param2", SqlDbType.NVarChar,50);
        command.Parameters["@param1"].Value = numOf_company;
        command.Parameters["@param2"].Value = txt_name.Text;
        connection.Open();
        command.ExecuteNonQuery();
        connection.Close();
      }
   catch(Exception ex)
      {
        throw new Exception(ex.ToString(), ex);
      }
}

It doesn't show any exeption, and when I check my table through the Visual studio explorer nothing is added to the table. Im having trouble figuring this out so i'd appreciate anyone who helps

Answer 1

Who is TABLE!?!? The name of your table? If yes, please change this name because if a reserved keyword

INSERT INTO table (param1,param2)VALUES(@param1,@param2)

becomes (for example)

INSERT INTO myTable (param1,param2)VALUES(@param1,@param2)

Answer 2

I believe you forgot your Initial Catalog in your connection. Because without it your code will try to run in master (the default database). Here is a snippet that should help you, you will need to modify the code obviously for your benefit.

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Working
{
class Program
{
    static void Main(string[] args)
    {
        string DsQuery = "INSERT INTO table (param1,param2)VALUES(@param1,@param2)"; 
        string TgtServer = @".\SQLEXPRESS";
        DataSet dsServers = new DataSet();
        dsServers = ExecQuery(DsQuery, TgtServer, "InitialCatalog");
    }

    private static DataSet ExecQuery(string strQuery, string strServer, string strIC)
    {

        string connectionString = @"Data Source=" + strServer + ";Initial Catalog=" + strIC + ";Integrated Security=SSPI";
        string commandString = strQuery;

        DataSet ds = new DataSet();
        try
        {
            SqlDataAdapter da = new SqlDataAdapter(commandString, connectionString);
            da.Fill(ds, "Table");
        }
        catch (SqlException e)
        {
            Console.WriteLine("An SQL Exception Occured: " + e.Message);

        }
        catch (Exception e)
        {
            Console.WriteLine("An General Exception Occured: " + e.Message);

        }

        return ds;

    }
}

}

Sorry I can't give you anything more but that is something I noticed was missing and based on the no error given I can't provide.

Here is further reading: http://technet.microsoft.com/en-us/library/aa905872(v=sql.80).aspx