I have a user control on an aspx page that contains filter fields and return a WhereClause. The user conrol will raise an event called FilterApplied when Search is clicked.
On my main form, I add the control with:
<uc1:Filter runat="server" ID="Filter" /> <br />
In my code behind I have:
protected void Page_Load(object sender, EventArgs e)
{
//Register event when filter is changed.
this.Filter.FilterApplied += new EventHandler(this.FilterApplied);
if (Page.IsPostBack)
{ //Do some things that take long
}
}
protected void FilterApplied(object sender, EventArgs e)
{
//Reload the page to refresh the graphs.
Page_Load(sender, e);
}
Problem is: When I click Search on my user control, the Form_Load runs twice. Once because it is reloaded and then another time because I call it from FilterApplied. If I don't call it from FilterApplied, then the whereclause is still empty.
How can I ensure the Page_Load only run once when Search is clicked?