private void btnStart_Click(object sender, EventArgs e) { NewKmeans kmeans = new NewKmeans(); StringBuilder sb = NewKmeans.kmeanstoo(); this.txtData.Text = sb.ToString(); List <NewKmeans.XY> dsList = new List <NewKmeans.XY>(); dsList = NewKmeans.CreateDataSet(); String listds = String.Empty; foreach (NewKmeans.XY XY in dsList) { listds += "(" + XY.XToString + " " + XY.YToString + ") , "; }//end foreach //this.txtData.Text = listds; this.dataGridView1.DataSource = dsList; }