sqlcommand

I saw that in most samples SqlCommand was used like this using (SqlConnection con = new SqlConnection(CNN_STRING)) { using (SqlCommand cmd = new SqlCommand("Select ID,Name From Person", con)) { SqlDataAdapter da = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); da.Fill(ds); return ds; } } I know why we are using "using" statement. But SqlCommand doesn't inlcude Close() method, so should we really use it within using statement Because it also implements IDisposable . The purpose of Using statement is that when control will reach end of using it will dispose that object of using block and

I am creating a project in which I need to run 2-3 sql commands in a single sql connection. Here is the code I have written: SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\project.mdf;Integrated Security=True"); con.Open(); SqlCommand cmd = new SqlCommand("select * from " + mytags.Text + " ", con); SqlDataReader rd = cmd.ExecuteReader(); if (rd.Read()) { con.Close(); con.Open(); SqlCommand cmd1 = new SqlCommand("insert into " + mytags.Text + " values ('fname.lname@gmail.com','" + TextBox3.Text + "','" + TextBox4.Text + "','" + TextBox5.Text

What's the best way to INSERT data into a database? This is what I have but it's wrong.. cmd.CommandText = "INSERT INTO klant(klant_id,naam,voornaam) VALUES(@param1,@param2,@param3)"; cmd.Parameters.Add(new SqlParameter("@param1", klantId)); cmd.Parameters.Add(new SqlParameter("@param2", klantNaam)); cmd.Parameters.Add(new SqlParameter("@param3", klantVoornaam)); The function add data into the listBox http://www.pictourl.com/viewer/37e4edcf (link is dead) but not into the database.. http://www.pictourl.com/viewer/4d5721fc (link is dead) The full function: private void Form1_Load(object sender,

Is there any difference between SqlCommand.CommandTimeout and SqlConnection.ConnectionTimeout in .NET? Yes. CommandTimeout is how long a single command can take to complete. ConnectionTimeout is how long it can take to establish a connection to the server to start with. For instance, you may be executing relatively long-running queries - it's perfectly okay for them to take 10 minutes to complete, but if it took 10 minutes to make the connection to start with, you'd know that something was badly wrong. SqlCommand.CommandTimeout = timeout limit for your SQL query. Means, how much time a (eg:

I usually use code like this: using (var connection = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConn"].ConnectionString)) { var command = connection.CreateCommand(); command.CommandText = "..."; connection.Open(); command.ExecuteNonQuery(); } Will my command automatically disposed? Or not and I have to wrap it into using block? Is it required to dispose SqlCommand ? Just do this: using(var connection = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConn"].ConnectionString)) using(var command = connection.CreateCommand()) { command.CommandText = "..."; connection

I'm making an C# windows Form Application in visual studio 2010. That application is connecting to an mysql database, and I want to insert data in it. Now do I have this part of code: MySqlConnection connection; string cs = @"server=server ip;userid=username;password=userpass;database=databse"; connection = new MySqlConnection(cs); connection.Open(); MySqlCommand command = new MySqlCommand(); string SQL = "INSERT INTO `twMCUserDB` (`mc_userName`, `mc_userPass`, `tw_userName`, `tw_userPass`) VALUES ('@mcUserName', '@mcUserPass', '@twUserName', '@twUserPass')"; command.CommandText = SQL; command