How to use callback in DevExpress

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C#

DevExpress

Hi, I'm new in using DevExpress, thank you first of all for checking my question.

Here is my problem:


I created a ASPxButton​ to hide/show a panelgraph, here are codes that I wrote:

<dx:ASPxButton ID="btHideShowChart"  runat="server" Text="Hide the chart" 
                                                                             önclick="btHideShowChart_Click" >
                                                                           <ClientSideEvents Click="function(s, e) {
                                                                                if(s.GetText().toString()== 'Hide the chart'){
	                                                                            callbackPanelGraph.SetVisible(false);
	                                                                            }
	                                                                            else{
	                                                                            callbackPanelGraph.SetVisible(true);
	                                                                            }
                                                                            }" />

at the same time, I wrote :

protected void btHideShowChart_Click(object sender, EventArgs e)
        {
            if (btHideShowChart.Text.ToString() == "Hide the chart")
            {
                btHideShowChart.Text = "Show the chart";
                return;
            }
            if (btHideShowChart.Text.ToString() == "Show the chart")
            {
                btHideShowChart.Text = "Hide the chart";
                return;
            }
        }

it does work well. But now, I'd like that once the chart is hidden, the width of another Panel beside​ could be bigger than before. ( There are two panels which are aligned: panelChart which I'd like to show/hide and panelDetail which I'd like to make it bigger when the panelChart is hidden. )

I'd tried callback..but it doesn't work....


thank you so much for helping!!​