programatically pass the connection string to the ssrs reports

Question

hi... to all

i've created ssrs reports local following is my code..

 public void source(string tbname,string Rptname)

        {

            ReportViewer1.Visible = true;

            string myQuery = "select * from " + tbname;

            SqlConnection myConnection = new SqlConnection(ConnectionString);

            SqlCommand myCommand = new SqlCommand(myQuery, myConnection);

            myCommand.Connection.Open();

            SqlDataAdapter da = new SqlDataAdapter(myCommand);

            DataSet dt = new DataSet();

            da.Fill(dt);

            //ReportParameter[] p = new ReportParameter[1];

            //p[1] = new ReportParameter("@p_dno", "5");

            //this.ReportViewer1.LocalReport.SetParameters(p);

            //DataSet dt = new DataSet();

            //dt = p;

            ReportViewer1.LocalReport.ReportPath = Rptname + ".rdlc" ;

            ReportViewer1.ProcessingMode = Microsoft.Reporting.WebForms.ProcessingMode.Local;

           ReportDataSource datasource = new ReportDataSource("employeeDataSet_" + tbname , dt.Tables[0]);

            ReportViewer1.LocalReport.DataSources.Clear();

            ReportViewer1.LocalReport.DataSources.Add(datasource);

       

        }

now it works good..

as i expected...

but i want to pass the datasource connection string from here is there any 

way to pass the datasource programatically....