RadAjaxManager and the aspx page not called...

[Marco Miccini]

I've a DIV control with an HtmlImage control inside dinamically generated by setting the src to a  an aspx page producing a Bitmap as

Response.OutputStream

.
Each time I press the btnVisualizza_MG button the image must be updated. The button is enclosed in a RadAjaxManager as triggering control of the div. This is a brief extract of the code.

 

<

 

telerik:RadAjaxManagerProxy ID="RadAjaxManagerProxy1" runat="server">

 

 

 

 

 

    <AjaxSettings>
        <telerik:AjaxSetting AjaxControlID="btnVisualizza_MG">

 

 

 

 

            <

 

UpdatedControls>

 

 

 

 

 

                <telerik:AjaxUpdatedControl ControlID="divDisegnoModificaDisegno" LoadingPanelID="lp1" />  

 

 

            </UpdatedControls>

 

 

 

 

 

        </telerik:AjaxSetting>

 

 

 

    <AjaxSettings>
</telerik:RadAjaxManagerProxy >

protected

 

void btnVisualizza_MG_Click(object sender, EventArgs e)

 

{

    divDisegnoModificaDisegno.Controls.Clear();

    System.Web.UI.HtmlControls.

HtmlImage image = new System.Web.UI.HtmlControls.HtmlImage();

 

    image.Src =

"DrawGeometriaSistema.aspx?dim_x=640&dim_y=609";

 

    divDisegnoModificaDisegno.Controls.Add(image);

}

THE PROBLEM: the first time I press the btnVisualizza_MG button, the DrawGeometriaSistema.aspx page is called and the image is generated but the following times the image remains unchanged since the code, when reaching "image.Scr=..." instruction, does not call the DrawGeometriaSistema.aspx page.

Why and how to solve this problem? 

[Iana Tsolova]

Hi Marco,

Could you please confirm that the problematic page works as expected with ajax disable or if you ajaxify it with ASP:UpdatePanel instead of RadAjax?
Additionally, it would be greate if you can send us a sample project illustrating the described issue for further debugging and investigation.

Check it out and let me know how it goes.
Greetings,
Iana
the Telerik team

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[Marco Miccini]

Dear Iana,
I've resolved creating a different image.scr each time the page is called by using in the url a fictious parameter containing a randon number.
i.e. image.Src="DrawGeometriaSistema.aspx?dim_x=640&dim_y=609&unused_par="+rnd.Next();
In this way the scr string is different each time is called and ... it works!