protected override void OnInit(EventArgs e)
{
_clientScriptManagerWrapper = ClientScriptManagerWrapper.Initialize(Page.ClientScript);
// TraceContext requires unique identifiers.
// "Multiple controls with the same ID 'aspnetForm' were found.
// Trace requires that controls have unique IDs."
// Source: TraceContext.AddNewControl(String, String, String, Int32, Int32)
Int32 index;
Int32.TryParse(PerRequestCache.Get("CustomHtmlForm.Index") as String, out index);
ID = "aspnetForm_" + index;
PerRequestCache.Set("CustomHtmlForm.Index", (++index).ToInvariantString());
if (!NewPostBackScriptAdded && Page.Header != null) {
var alreadyAddedNewScript = Page.Header.Controls.OfType<NewPostBackScript>().Any();
if (!alreadyAddedNewScript) {
Page.Header.Controls.Add(new NewPostBackScript());
NewPostBackScriptAdded = true;
}
}
base.OnInit(e);
}
internal static ClientScriptManagerWrapper Initialize(ClientScriptManager mgr)
{
var instance = PerRequestCache.Get("CustomHtmlForm.ClientScriptManagerWrapper") as ClientScriptManagerWrapper;
if (instance != null)
return instance;
instance = new ClientScriptManagerWrapper(mgr);
PerRequestCache.Set("CustomHtmlForm.ClientScriptManagerWrapper", instance);
return instance;
}