public string GetPostBackEventReference(PostBackOptions options) { if (options == null) { throw new ArgumentNullException("options"); } string actionUrl = options.ActionUrl; if (actionUrl == null && options.ValidationGroup == null && !options.TrackFocus && !options.AutoPostBack && !options.PerformValidation) { if (!options.ClientSubmit) { return(null); } if (options.RequiresJavaScriptProtocol) { return(GetPostBackClientHyperlink(options.TargetControl, options.Argument)); } else { return(GetPostBackEventReference(options.TargetControl, options.Argument)); } } RegisterWebFormClientScript(); Page page = OwnerPage; HttpRequest req = page.RequestInternal; Uri pageUrl = req != null ? req.Url : null; if (pageUrl != null) { RegisterHiddenField(Page.PreviousPageID, pageUrl.AbsolutePath); } if (options.TrackFocus) { RegisterHiddenField(Page.LastFocusID, String.Empty); } string prefix = options.RequiresJavaScriptProtocol ? "javascript:" : String.Empty; if (page.IsMultiForm) { prefix += page.theForm + "."; } return(prefix + "WebForm_DoPostback(" + ClientScriptManager.GetScriptLiteral(options.TargetControl.UniqueID) + "," + ClientScriptManager.GetScriptLiteral(options.Argument) + "," + ClientScriptManager.GetScriptLiteral(actionUrl) + "," + ClientScriptManager.GetScriptLiteral(options.AutoPostBack) + "," + ClientScriptManager.GetScriptLiteral(options.PerformValidation) + "," + ClientScriptManager.GetScriptLiteral(options.TrackFocus) + "," + ClientScriptManager.GetScriptLiteral(options.ClientSubmit) + "," + ClientScriptManager.GetScriptLiteral(options.ValidationGroup) + ")"); }