C# update

that's is right carl thank you very much and also I just figured that I forgot to add the Reader in my code now all work fine:

Carl , it seems that any time I'm trying to update I got some issue I think that I'm not really understand the concept updating database columns can you give my some explanation also I would like to now what is the difference between these two update methods

1.

string Query = "update RMSCRM.dbo.sales set Status=@Status, note=@note where ID=@id";
            
           

            SqlConnection Myconn = new SqlConnection(conn);
            SqlCommand cmd = new SqlCommand(Query, Myconn);

            int SalesID = int.Parse(this.txtid.Text);

            cmd.Parameters.AddWithValue("@id", SalesID);
            cmd.Parameters.AddWithValue("@status", this.txtStatus.Text);
            cmd.Parameters.AddWithValue("@note", this.txtNote.Text);

Select allOpen in new window

2.
string Query = "update rmsmasterdbtest.dbo.serial set serialnumber='" + this.txtsn.Text + "' ,serialnumber3='" + this.txtstatus.Text + "' where serialnumber='" + this.txtsn.Text + "' ;";

           
            SqlConnection Myconn = new SqlConnection(conn);
            SqlCommand cmd = new SqlCommand(Query, Myconn);
            SqlDataReader Reader;
           

            try
            {
                Myconn.Open();
                Reader = cmd.ExecuteReader();
                MessageBox.Show("Updated Status");
                while (Reader.Read())
                {

                }

Thank you soo much

I read some material but still get complicated when I'm trying to write update code.

I've requested that this question be closed as follows:

Accepted answer: 0 points for motimash's comment #a39994534
Assisted answer: 500 points for carl_tawn's comment #a39994409

for the following reason:

Thanks

Excellent as usual