Questions on UI for WinForms Forum

3 answers

373 views

I am deriving a custom control from the RadDateTimePicker (version: 2011.1.11.419 or Q1 2011) trying to get it to work with null values. We need it to display an empty string when bound to a null value. For the most part this is working with the code below.

public new DateTime? Value

{

get

{

if (_value.HasValue)

return _value.Value;

return _value;

}

set

{

if (_value != value)

{

_value = value;

OnValueChanged(new EventArgs());

}

public new DateTime? NullDate

{

get { return _nullDate; }

set { _nullDate = null; }

}

void AmDateTextBox_ValueChanged(object sender, System.EventArgs e)

{

if (this.Value == null)

{

this.SetToNullValue();

}

else

{

this.DateTimePickerElement.TextBoxElement.TextBoxItem.Text = this.Value.Value.ToShortDateString();

}

If I am viewing a record with a date value and change to another record with a date value all is well. If I then change to a record with a null date it displays fine. But when I change back to a record with a date value nothing is displayed. I would also like to remove the hard coded format in the Value Changed event handler. I am binding RadDateTimePicker.Value to a DateTime? field on Csla objects not a data table.

Thanks,

grj

Calendar, DateTimePicker, TimePicker and Clock

answered on 01 May 2013

1 answer

111 views

Track event when used 'insert' from contextmenu

Hi,

I try to hook an event that signals the value changing, when I am using the 'Insert' (or 'Einfügen' in german) function from the standard context menu. Neither 'CellValueChanged' is fired nor 'ValueChange' . I need to track cause of the database update. Can you help?

Greets Robert

GridView

answered on 01 May 2013

1 answer

272 views

RadListView adding new event handler

I am using Q1 2011 Reporting on VS 2012. I want to add new event to RadListView but I am getting an error. Here is the part of my code. Error line is in bold.

private Telerik.WinControls.UI.RadListView lvRules;

private void lvRules_SelectedItemChanged(object sender, ListViewItemEventArgs e)
{
ListViewDataItem item = e.Item;
if (item == null)
return;
DbSpamRule rule = (DbSpamRule)item.Tag;
Rule2FormObjects(rule);
}

this.lvRules.SelectedItemChanged += new Telerik.WinControls.UI.ListViewItemEventHandler(this.lvRules_SelectedItemChanged);

How can I fix this error?: Cannot implicitly convert type 'Telerik.WinControls.UI.ListViewItemEventHandler' to 'System.EventHandler'

Any suggestions?

ListView

answered on 30 Apr 2013

1 answer

157 views

ListView and DragDropService

I have a ListView in IconMode which supports drag & drop for reordering the items by using the ListViewDragDropService:
dim myDDService as new ListViewDragDropService = ListView.ListViewElement.DragDropService
It works fine. Now I try the same with a databound ListView but I doesn't react on dragging. When I remove the databinding and fill the listview manually with the items, drag and drop works.

ListView

answered on 30 Apr 2013

3 answers

79 views

RadScheduler appointments not re sized in database binded mode

Hi,

Launch your demo application and select -->scheduler -->DataBinding
Select Bind to dataset
Try to re-size any appointment by mouse and hit save button it will revert to previous state
eg:select Mr. Blue 12.00PM to 5.00PM and i had re sized it using mouse to 12.00PM to 6.00PM
then clicked save button and you see the error.

Scheduler and Reminder

answered on 30 Apr 2013

1 answer

169 views

PageView Control Data Binding

I am developing a WinForms application using a RadPageView control with eight tabs. On each tab I have a mix of RadTextBox and RadDropDownList controls all bound to a object using a BindingSource control. When I bind an object to this datasource the SelectedValue on certain drop downs don't always bind on pages after the first one. As soon as I click on the page the SelectedValue updates and it displays the correct value. There doesn't seem to be any pattern to which drop downs have this problem and the ones that have the problem seem to periodically change.

Does anyone know why this happens or if there is a way around it? The problem it is causing me is that when I call ValidateChildren on the form the validation is happening without the values being correct, but when I switch to the page with the error the field is correct but still shows the validation error.

PageView

answered on 30 Apr 2013

4 answers

152 views

Add Button to Choose Image

Hi,
I want to add a button or another control, which could give users an option to choose an image from the harddrive in RadGridView

GridView

answered on 30 Apr 2013

1 answer

90 views

Upgrading from 2009

Hi,

I'm an older user (2009) and I have purchased an actual license (3013.1).
I want to use Upgrade Tool but I can't do what it says in the links...

http://www.telerik.com/help/winforms/pageview-upgrading-to-radpageview.html

"This article is valid for RadControls for WinForms versions prior to Q2 2011 SP1 inclusive. The Upgrade Tool can be used only if started from the SmartTag of the obsolete controls. Since these controls have been removed in Q3 2011, their respective Upgrade Tools are not available as well. In case you want to use the tools, please upgrade/downgrade to Q2 2011 SP1 (v2011.2.11.831)"

The question is, how could I upgrade first to Q2 2011 SP1, and then to 2013.1?

Thank,
Francisco

General Discussions

answered on 30 Apr 2013

2 answers

135 views

Change color to custom descriptions

Hello
I'm trying to create custom backgrounds for appointments.
The code is used to add:

Me.RadScheduler1.Backgrounds.Add((New AppointmentBackgroundInfo(23, "Orange"

, Color.Orange, Color.Orange)))

Me.RadScheduler1.Backgrounds.Add((New AppointmentBackgroundInfo(24, "Yellow"

, Color.Gold, Color.Gold)))

Me.RadScheduler1.Backgrounds.Add((New AppointmentBackgroundInfo(25, "Green", Color.YellowGreen, Color.YellowGreen)))

The problem is that the text of the description and the location is the same color. Deputy image to view
http://img211.imageshack.us/img211/2582/examplerz.png

Is there a way to customize the text of the description and the location?
Deputy image to show how I want.
http://img825.imageshack.us/img825/1968/app1z.png

I visited the references page but I do not go out of doubt ( http://www.telerik.com/help/winforms/scheduler-appointments-and-dialogs-working-with-appointments.html )

I'm using Visual Basic.net 2012 Framworks 4.5 whith telerik Q1 2013
thanks

Scheduler and Reminder

answered on 30 Apr 2013

3 answers

116 views

How to display complex object

Hello,

We've got a complex domain model and I want to display different series in the chart view. Nothing extremely fancy, something like this:

class Data {

public float Y1 {get;set;}

public float Y2 {get;set;}

public float Y3 {get;set

;}

public TimeSpan When {get;set;}

public float Sum {get{return Y1+Y2+Y3;}}

public byte Address {get;set;}

}

And so on, along these lines. We'll want to take an IEnumerable<Data> and GroupBy(x => x.Address) then display each of those groups in a series of their own.

It's actually a little more complex than that, there will be calculators running, and lambdas, but should be transparent to the chart view. SHOULD BE. Oh, and I want to display these ordered in the time domain: When (TimeSpan, time into test) is my X axis. Some function of the Y's are my Y axis.

Thus far I can get the series to at least appear and title themselves in the legend, so I have some visual feedback that that much is working. However, I get no data displaying in the LineSeries at all. It's all flat lines so far, but I do get some series there, so I know it's trying.

How do I instruct the chart to find our data?

Thank you...

ChartView

answered on 29 Apr 2013