I can't seem to add the records to my database inside Visual Studio

Question

Hi there im new to C# and SQL. But my problem is with SQL im trying to conect to a Database i created on visual studio 2010. it trhows me the exception of cannot convert vachar to float. Here is the code.

private void execute()
{
     ///Here we atempt to connect to the local DB
     System.Data.SqlClient.SqlConnection SqlConnection1 = new   
     System.Data.SqlClient.SqlConnection(@"Data 
     Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database1.mdf;Integrated 
     Security=True;User Instance=True");
     SqlConnection1.Open();
     System.Data.SqlClient.SqlTransaction tx = SqlConnection1.BeginTransaction();
     System.Data.SqlClient.SqlCommand cmd = SqlConnection1.CreateCommand();
     cmd.Transaction = tx;
     ///Here we try to operate on the Local DB
     try
     {                
          cmd.CommandText = "INSERT INTO EmployeeInfo(EmployeeSalary,EmployeePhone,EmployeeDeskPhone,EmployeeSSN,EmployeeEmergencyContactName,EmployeeEmergencyContactPhone,EmployeeFirstName,EmployeeLastName) VALUES  
            (@_employeeSalary,'@_employeePhone','@_employeeDeskPhone','@_employeeSSN','@_employeeEmergencyContactName','@_employeeEmergencyContactPhone','@_employeeFirstName','@_employeLastName')";
          cmd.Parameters.AddWithValue("@_employeeSalary", _employeeSalary);
          cmd.Parameters.AddWithValue("@_employeePhone", _employeePhone);
          cmd.Parameters.AddWithValue("@_employeeDeskPhone", _employeeDeskPhone);
          cmd.Parameters.AddWithValue("@_employeeSSN", _employeeSSN);
          cmd.Parameters.AddWithValue("@_employeeEmergencyContactName",  
            _employeeEmergencyContactName);
          cmd.Parameters.AddWithValue("@_employeeEmergencyContactPhone", 
            _employeeEmergencyContactPhone);
          cmd.Parameters.AddWithValue("@_employeeFirstName", _employeeFirstName);
          cmd.Parameters.AddWithValue("@_employeeLastName", _employeeLastName);
          cmd.ExecuteNonQuery();
          tx.Commit();
     }
     ///If unsuccesful we rollback changes 
     catch (System.Data.SqlClient.SqlException sqlException)
     {
          System.Windows.Forms.MessageBox.Show(sqlException.Message);
          tx.Rollback();
          Console.WriteLine("**** There was Trouble Houston, with the Insert****");
     }
     ///Thhis piee of code always executes
     finally
     {
          SqlConnection1.Close();
          Console.WriteLine("***** if theres no trouble before this,  then It succesfully added the record to the database*****");
     } 
}

the variable emplyeeSalary is set to float and is the only one so i don get whjy it trhows that message. Please any help would be deeply apreciated.

Answer 1

Your problem is quite simple, you've placed the command parameters inside single quotes for some reason. Change them to the following:

cmd.CommandText = @"INSERT INTO 
  EmployeeInfo( EmployeeSalary ,EmployeePhone, EmployeeDeskPhone, EmployeeSSN,
  EmployeeEmergencyContactName, EmployeeEmergencyContactPhone, EmployeeFirstName,
  EmployeeLastName) VALUES  
  (@_employeeSalary,@_employeePhone,@_employeeDeskPhone,@_employeeSSN,
   @_employeeEmergencyContactName,@_employeeEmergencyContactPhone,
   @_employeeFirstName, @_employeLastName)";