answering my own question... i did this ans i am getting a simple decent looking chart at least for the beginning :
This is the .aspx design part :
<asp:Chart ID="Chart1" runat="server" Width="920px" Height="130px" >
<Series>
<asp:Series Name="Series1" ChartType="Bar">
</asp:Series>
</Series>
<ChartAreas>
<asp:ChartArea Name="ChartArea1" BackColor="Yellow">
<AxisY Title="Duration" Interval="Auto">
</AxisY>
<AxisX Title="PO Number">
</AxisX>
<%--<Area3DStyle Enable3D="true" />--%>
</asp:ChartArea>
</ChartAreas>
and this is the code part in .cs file :
public void fill()
{
con.Open();
SqlCommand cmd = new SqlCommand("select PONumber,CompletionTimeDays,CreatedOn from PurchaseOrder");
cmd.Connection = con;
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
Chart1.DataSource = dt;
Chart1.Series["Series1"].XValueMember = "PONumber";
Chart1.Series["Series1"].YValueMembers = "CompletionTimeDays";
//Chart1.Series["Series1"]["DrawingStyle"] = "Emboss";
Chart1.DataBind();
con.Close();
}
hope this will help who is starting doing this as me