Questions on UI for ASP.NET AJAX Forum

1 answer

169 views

Elmah shows NullReferenceException during RadAjaxControl.RenderPageInAjaxMode

Sometimes my Elmah logs shows(note there is no namespace of my application code),

System.Web.HttpUnhandledException (0x80004005): Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.NullReferenceException: Object reference not set to an instance of an object.

at System.Web.UI.AsyncPostBackTrigger.HasTriggered()

at System.Web.UI.UpdatePanelTriggerCollection.HasTriggered()

at System.Web.UI.PageRequestManager.ProcessUpdatePanels()

at System.Web.UI.PageRequestManager.RenderPageCallback(HtmlTextWriter writer, Control pageControl)

at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)

at System.Web.UI.Page.Render(HtmlTextWriter writer)

at Telerik.Web.UI.RadAjaxControl.RenderPageInAjaxMode(HtmlTextWriter writer, Control page)

at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)

at System.Web.UI.Page.Render(HtmlTextWriter writer)

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

at System.Web.UI.Page.HandleError(Exception e)

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

at System.Web.UI.Page.ProcessRequest()

at System.Web.UI.Page.ProcessRequest(HttpContext context)

at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()

at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

General Discussions

answered on 30 Oct 2014

0 answers

80 views

Grouping and Sum column based on conditions

Hi,

I have a grid, where i had done a grouping with InvoiceNumber, and also i need to sum a particular column. Everything was fine, but now i want sum the column based on some condition. (i.e) i have column called "Cancelled". need to sum the column where Cancelled > 5. How can i achieve this?

Grid

asked on 30 Oct 2014

1 answer

216 views

Show notification on CallBack update

Is it possible to trigger the notification show() on the call back update function? Especially when the notification was created dynamically.

RadNotification notification = new RadNotification();

notification.LoadContentOn = Telerik.Web.UI.NotificationLoad.TimeInterval;

notification.UpdateInterval = 20000;

notification.CallbackUpdate +=_notification_CallbackUpdateOnTime;

protected void _notification_CallbackUpdateOnTime(object sender, RadNotificationEventArgs e)

{

if( <some condition>)

{

((Telerik.Web.UI.RadNotification)(sender)).Show();

}

Notification

answered on 30 Oct 2014

5 answers

166 views

Dynamic resize of Gantt

Just curious if anyone has figured a way to dynamically resize the Gannt chart on the client side. I've tried resizing the entire div container but it looks like I'd have to do every container inside the main div. Is there an easier way?

Gantt

answered on 30 Oct 2014

3 answers

221 views

Hide RadGrid Header Label When Inserting

Hello,

I am hoping that someone can help with a requirement I'm trying to accomplish. What I am trying to accomplish is when a new record is added I am wanting to hide the label and entry textbox based on the value of a dropdown. I have been able to successfully hide the textbox but I can't find a way to hide the label. From browsing the net and reading other forums I used the EditFormHeaderTextFormat property to set to empty and it does hide the label, but the issue now is setting the value in the code behind in the selectedindexchanged event back to a value. I have included sample code for what I have below. If anyone knows an alternate solution that would work please let me know.

Aspx

<telerik:GridTemplateColumn EditFormHeaderTextFormat="" DataField="CHIPReasonOther" DataType="System.String" FilterControlAltText="Filter Reason column" HeaderText="Define Other" SortExpression="ReasonOther" UniqueName="CHIPReasonOther">

<EditItemTemplate>

<telerik:RadTextBox ID="txtCHIPReasonOther" runat="server" Width="275px" MaxLength="50" Visible="false"></telerik:RadTextBox>

<asp:RequiredFieldValidator ID="rqdReasonOther" ControlToValidate="txtCHIPReasonOther" runat="server" ErrorMessage="Required" CssClass="validation" Enabled="false" Display="Dynamic"></asp:RequiredFieldValidator>

</EditItemTemplate>

<ItemTemplate>

<asp:Label ID="lblCHIPReasonOther" runat="server" Text='<%# Bind("CHIPReasonOther") %>' Enabled="True" Visible="true" />

</ItemTemplate>

</telerik:GridTemplateColumn>

Code behind

protected void rcbTempOOH_SelectedIndexChanged(object o, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)

{

RadComboBox rcbSender = (RadComboBox)o;

GridEditFormItem item = rcbSender.NamingContainer as GridEditFormItem;

RadTextBox txtCHIPReasonOther = item.FindControl("txtCHIPReasonOther") as RadTextBox;

RequiredFieldValidator rqdReasonOther = item.FindControl("rqdReasonOther") as RequiredFieldValidator;

var selectedItem = e.Text;

selectedItem = Regex.Replace(selectedItem, @"\s+", "");

txtCHIPReasonOther.Text = string.Empty;

if (selectedItem == "Other")

{

txtCHIPReasonOther.Visible = true;

rqdReasonOther.Enabled = true;

}

else

{

txtCHIPReasonOther.Visible = false;

rqdReasonOther.Enabled = false;

}

Grid

answered on 30 Oct 2014

18 answers

656 views

RadScheduler rebind problem

Hello Telerik team,
I tried to found a solution how update RadScheduler after appoinment update but without success. For create/update appoinment I use iframe. On OnClientAppointmentInserting or OnClientAppointmentEditing I use jQuery plugin PrettyPhoto to open iframe.

function onAppointmentInserting(sender, eventArgs) {

eventArgs.set_cancel(true);

var targetSlot = eventArgs.get_targetSlot();

var categoryId = targetSlot.get_resource().get_key();

var day = eventArgs.get_startTime();

var date = '' + (1 + day.getMonth()) + '/' + day.getDate() + '/' + day.getFullYear();

jQuery.prettyPhoto.open('../PopUpAppoinmentInsert.aspx?categoryId=' + categoryId + '&start=' + date + '&end=' + date + '&iframe=true&width=700&height=500', 'Calendar item..');

jQuery('a.pp_close').css("display", "none");

function OnAppointmentEditing(sender, eventArgs) {

eventArgs.set_cancel(true);

var eventId = eventArgs.get_appointment().get_id()

jQuery.prettyPhoto.open('../PopUpAppoinmentInsert.aspx?eventId=' + eventId + '&iframe=true&width=700&height=500', 'Calendar item..');

jQuery('a.pp_close').css("display", "none"

);

}

After user click Save

protected void bSave_Click(object sender, EventArgs e)

{

try

{

CalendarCategory category = null;

CalendarEvent calendarEvent = null;

CalendarEventGovernor governor = new CalendarEventGovernor();

CalendarCategoryGovernor categoryGov = new CalendarCategoryGovernor();

//create entity

// ...

// then save

governor.Save(calendarEvent);

// after I write a javascript to close iframe and run my rebind method

ClientScriptsHelper.RegisterScript("window.parent.jQuery.prettyPhoto.close();window.parent.rebind(1);", true);

}

catch

{

}

How I rebind data from javascript

<telerik:RadAjaxManager ID="RadAjaxManager2" runat="server" OnAjaxRequest="RadAjaxManager2_AjaxRequest" DefaultLoadingPanelID="RadAjaxLoadingPanel2" >

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="RadAjaxManager2">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="RadScheduler1" />

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

function rebind(schedule)

{

var ajax = $find('<%= RadAjaxManager2.ClientID%>');

ajax.ajaxRequest("ReBindRadScheduler" + schedule);

}

and server part

protected override void OnInit(EventArgs e)

{

base.OnInit(e);

if (!IsPostBack)

{

cboCategory.DataSource = GetCategories();

cboCategory.DataBind();

cboCategory.Items[0].Selected = true;

cboCategory.Visible = false;

FillSchedule(RadScheduler1, 1);

FillSchedule(RadScheduler2, 2);

FillSchedule(RadScheduler3, 3);

FillSchedule(RadScheduler4, 4);

FillSchedule(RadScheduler5, 5);

}

protected void RadAjaxManager2_AjaxRequest(object sender, AjaxRequestEventArgs e)

{

if (e.Argument == "ReBindRadScheduler1")

FillSchedule(RadScheduler1, 1);

//......

if (e.Argument == "ReBindRadScheduler5")

FillSchedule(RadScheduler5, 5);

}

private void FillSchedule(RadScheduler MainScheduler, int categoryId)

{

var defualtMinTime = TimeSpan.FromHours(6);

var defualtMaxTime = TimeSpan.FromHours(23);

MainScheduler.DayStartTime = defualtMinTime;

MainScheduler.WorkDayStartTime = MainScheduler.DayStartTime;

MainScheduler.DayEndTime = defualtMaxTime;

MainScheduler.WorkDayEndTime = MainScheduler.DayEndTime;

MainScheduler.Appointments.Clear();

MainScheduler.DataSource = null;

MainScheduler.DataBind();

var categories=GetCategoriesResources(categoryId);

MainScheduler.ResourceTypes.First().DataSource = categories;

//SchedulerToolTipManager.TargetControls.Clear();

CalendarEventGovernor governor = new CalendarEventGovernor();

MainScheduler.DataSource = governor.GetAllBy(categories.Select(x => x.Id).ToArray(), MainScheduler.SelectedDate, MainScheduler.SelectedDate.AddDays(MainScheduler.TimelineView.NumberOfSlots));

MainScheduler.DataBind();

MainScheduler.OnClientAppointmentInserting = "onAppointmentInserting";

MainScheduler.OnClientAppointmentEditing = "OnAppointmentEditing";

MainScheduler.OnClientAppointmentMoveEnd = "OnClientAppointmentMoveEnd";

MainScheduler.OnClientAppointmentMoveStart = "OnClientAppointmentMoveStart";

}

RadScheduler populated on Init but not rebind after insert/update. If I refresh page changes appear

Scheduler

answered on 30 Oct 2014

1 answer

101 views

How to check RadComboBox for entered value

I need to execute some code if the user enters value rather than selecting it from the list, on a RadComboBox with AllowCustomText=true. I am new to this tool so any suggestions will be appreciated.
Thanks!

ComboBox

answered on 30 Oct 2014

11 answers

328 views

Unable to get property '_events' of undefined or null reference

Hello Again,

I am facing another issue. Again, there is a mix of controls. The problem is that c is null and an exception is thrown. I am using IE 10 to test by the way. Let me know if you require any additional information and I will post it.

Thanks,
John.

,_removeHandler:function(c,d,e){var a=null;
var b=c._events[d]||[];
for(var f=0,g=b.length;
f<g;
f++){if(b[f].handler===e){a=b[f].browserHandler;
break;
}}if($telerik.useDetachEvent(c)){c.detachEvent("on"+d,a);
}else{if(c.removeEventListener){c.removeEventListener(d,a,false);
}}b.splice(f,1);

General Discussions

answered on 30 Oct 2014

3 answers

113 views

Rad Grid - Group By - DropDownColumn text instead of value

GridGroupByExpression exp = GridGroupByExpression.Parse("group by " + name);

GridGroupByField field = new GridGroupByField();

field.FieldAlias = "Group";

field.FieldName = name;

exp.SelectFields.Add(field);

rg.MasterTableView.GroupByExpressions.Add(exp);

I have a rad grid that I am creating dynamicaly.
The grid has a drop down box control in it along with other fields such as text.

GridDropDownColumn gdc = new GridDropDownColumn();

gdc.Visible = visible;

gdc.DataField = uniqueName;

gdc.HeaderText = headerText;

gdc.ListTextField = "Value";

gdc.ListValueField = "ListValueId";

gdc.UniqueName = uniqueName;

gdc.DropDownControlType = GridDropDownColumnControlType.DropDownList;

When I group by the drop down column, I get it grouped by the value instead of the text.

Is there a way to specify which one?

I need value and text to be different so making them the same is not a solution.

Grid

answered on 30 Oct 2014

1 answer

57 views

Filter is not working when GridHyperLinkColumn is placed in DetailTables

Filter is not working when GridHyperLinkColumn is placed inside the DetailTables...............

I am using the telerik latest Version.
Tried in all these browsers. No luck
IE 9 and plus
Chrome
Firefox

Please help to resolve it.

Grid

answered on 30 Oct 2014