'Declaration
 
Public Overrides Sub OnWebControlRender( _
   ByVal output As System.Web.UI.HtmlTextWriter _
) 

'Usage
 
Dim instance As NChartAjaxTechnology
Dim output As System.Web.UI.HtmlTextWriter
 
instance.OnWebControlRender(output)

public override void OnWebControlRender( 
   System.Web.UI.HtmlTextWriter output
)

Parameters

output

The System.Web.UI.HtmlTextWriter object that receives the control content.

If there are errors renders an HTML div with detailed error report.

Else this method creates a div element with an id similar to "MyChartWebControl_Div" (<the id of the web control> + "_Div") and inside the div ceates an image element with an id similar to "MyChartWebControl_chartImage" (<the id of the web control> + "_chartImage"). The image element is followed by a <br /> tag in order to avoid the extra spacing, rendered by default by the browsers below an image, located as a child in a box HTML element. In addition this method renders a JavaScript block that registers the client-side AJAX callback service, associated with the web control. The client-side AJAX callback service is an instance of the NChartCallbackService client-side JavaScript class and can be obtained at client-side with the following JavaScript call: if(typeof(NChartCallbackService) != "undefined") { var cs = NChartCallbackService.GetCallbackService("MyChartWebControl"); //... } The callback service registration script is rendered outside the div element.

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

NChartAjaxTechnology Class
NChartAjaxTechnology Members