ansaurus

Question

Ms charts : Area chart is not loading sometimes when using div.Load ,method to render a chart

Answer 1

+2 A:

Couple of things:

You're rendering a whole page to ajax, you should just render your panel
You are doing a POST to your ChartHandler page, this should be a GET
You're requesting text/xml, yet you aren't doing anything with xml
You're requesting a webpage. Just use a generic handler (ashx) for stuff like this

Example code

HTML page

<form id="form1" runat="server">
<div>
    <p>Test page</p>
    <div id="renderPanel">
    </div>
</div>
</form>

<script type="text/javascript">
    $(document).ready(function() {
        $.get("chart.ashx?propertyA=1&propertyB=2", function(data, textStatus) {
            $("#renderPanel").html(data);
        });
    });
</script>

Create a generic handler (ashx) with the name 'Chart.ashx'

public class ChartHandler : IHttpHandler {

public void ProcessRequest (HttpContext context) {
    //process querystring, which is in 'context.Request.QueryString'

    context.Response.ContentType = "text/html";

    PlaceHolder wrapperPanel = new PlaceHolder();
    //add your chart here
    wrapperPanel.Controls.Add(
        new Image() { ImageUrl = "http://www.geenstijl.nl/archives/images/niekijkenw.png" });

    //render control to HTML
    StringBuilder stringBuilder = new StringBuilder();
    StringWriter stringWriter = new StringWriter(stringBuilder);
    HtmlTextWriter htmlWriter = new HtmlTextWriter(stringWriter);

    wrapperPanel.RenderControl(htmlWriter);

    context.Response.Write(wrapperPanel);
}

public bool IsReusable {
    get {
        return false;
    }
}
}

Add in web.config under httpHandlers:

<add verb="*" path="~/Chart.ashx" validate="false" type="ChartHandler"/>

Jan Jongboom 2009-11-04 09:44:28

ansaurus

tags:

views:

answers:

Ms charts : Area chart is not loading sometimes when using div.Load ,method to render a chart

related questions