------解决方案--------------------
你用的是哪个图表控件
SqlCommand com = new SqlCommand(strSql, conn);
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = com;
DataSet ds = new DataSet();
da.Fill(ds, "table");
DataView dv = new DataView(ds.Tables[0]);
Chart1.Series[0].Points.DataBindXY(dv, "列", dv, "data");