i have a chart..but i dont know how to bind data in chart from database....

 <asp:chart id="chtRepositoryLevel" runat="server" xmlns:asp="#unknown">
                        <series>
                            <asp:series name="seriesTotalDocument" xvaluemember="RepositoryName" yvaluemembers="TotalDocument">
                                IsValueShownAsLabel="true">
                            </asp:series>
                        </series>
                        <chartareas>
                            <asp:chartarea name="chartArea" area3dstyle-enable3d="true">
                            </asp:chartarea>
                        </chartareas>
                    </asp:chart>


 chtRepositoryLevel.DataSource = objDataTable;
 chtRepositoryLevel.DataBind();


web.config


			<assemblies>
<add assembly="System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /></assemblies>


<pages enablesessionstate="true">
			<controls>

				<add tagprefix="asp" namespace="System.Web.UI.DataVisualization.Charting" assembly="System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
			</controls>
		</pages>



	<system.webserver>
  <validation validateintegratedmodeconfiguration="false" />
  <handlers>
   <remove name="ChartImageHandler" />
   <add name="ChartImageHandler" precondition="integratedMode" verb="GET,HEAD,POST">
    path="ChartImg.axd" type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
  </add></handlers>
 </system.webserver>