Insert the textbox value to database and retrive it to List Box

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hi evryone..
i want to get the text box value to list box .
And also i want this textbox value enter into the dabasex table called Area and @ th esame time insert this value to List box. here is the code wich i have use.

SqlConnection conn = new SqlConnection(ConnectionString);
                String S = "Insert into Area values ('" + textBox1.Text.ToString().Trim() + "')";
                SqlCommand command = new SqlCommand(S);
                SqlDataAdapter da = new SqlDataAdapter(S,ConnectionString);
              // DataSet dt = new DataSet();
                DataTable dt = new DataTable();
                da.Fill(dt);
                  
               textBox1.Clear();
                listBox1.Items.Add(dt.Rows[0].ItemArray[0].ToString());

but here DataTable is not filling. Can any1 tell me what is the problem here.
thank you everyone

Posted 10-Jan-10 18:03pm

buterfly

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Rod Kemp · Accepted Answer · 2010-01-10T18:38:00

The problems here are;

INSERT statements do not return data
Taking a value direct from a text box opens your code to injection attack, learn about parameters and how to use them.

You don't need a SqlDataAdapter or DataTable for this

SqlCommand command = new SqlCommand(sqlQuery, conn);
conn.Open();
command.ExecuteNonQuery();
conn.Close();

//After Inserting value into database add the value to the list box, THEN clear the text box
listBox1.Items.Add(textBox1.Text.Trim());
textBox1.Clear();