DevOps, CI/CD and Automation

dear all;

I have the following syntax below

 protected void Button1_Click(object sender, EventArgs e)
    {

 string oradb = "User Id=finance;Password=finace1;Data Source=XE";
        string sql = "select ID, Create_date from t_mobile";
        OracleDataAdapter adapter = new OracleDataAdapter(oradb, sql);
        OracleCommandBuilder builder = new OracleCommandBuilder(adapter);

        DataSet dataset = new DataSet();

        adapter.Fill(dataset, "t_mobile");

        DataTable mytable = dataset.Tables["t_mobile"];

        GridView1.DataSource = mytable;
        GridView1.DataBind();
    }

but I keep getting the error message connection not well formatted, how I do connect to my sql*plus using visual web developer 2010 express for practicing purposes. thank you. a simple code example will also help