Question

I am inserting into a table by using the newxt query, but I dont know what the syntax is for telling the query I need to insert where training_id = &dateSelected& , the query below works by using a static value to test (2) .

Please help.

private void InsertInfo()
    {
        var dateSelected = dpDate.SelectedItem.Value;
        SqlConnection conn = new SqlConnection(GetConnectionString());

    string sql =    "INSERT INTO personTraining (name,training_id, training,trainingDate,trainingHour, trainingSession)SELECT @Val1,training_id,training,trainingDate,trainingHour,trainingSession FROM tbl_training WHERE  training_id = 2";

Answer 1

Use parameters as follows:

private void InsertInfo()
{
  var dateSelected = dpDate.SelectedItem.Value;
  using(SqlConnection conn = new SqlConnection(GetConnectionString()))
  {
       conn.Open();
       SqlCommand command= conn.CreateCommand();
       command.CommandText=     "INSERT INTO personTraining (name,training_id, training,trainingDate,trainingHour, trainingSession)SELECT @Val1,training_id,training,trainingDate,trainingHour,trainingSession FROM tbl_training WHERE  training_id = @trainingID";

      command.Parameters.AddWithValue("@trainingID",dateSelected);
      command.ExecuteNonQuery();
}

However, you have another @Val1 parameter in your query; I don’t know where is that coming from.