Questions on UI for WinForms Forum

9 answers

2.8K+ views

Hi,

Inthat scenario, when I try to edit the selected item, you'll see thelist.Selected Value is not changed.
But if you press button to get the Selected Value, you'll it's already = null.

It should keep the selected value, because it's needed to update data (text), using the id as value in a DB table..

public partial class RadForm2 : Telerik.WinControls.UI.RadForm

{

RadDropDownList list = new RadDropDownList();

TextBox tb = new TextBox();

Button b = new Button();

public RadForm2()

{

InitializeComponent();

this.Controls.AddRange(new Control[] { list, tb, b });

list.DropDownStyle = RadDropDownStyle.DropDown;

list.Location = new Point(30, 30);

list.Width = 100;

list.Height = 25;

list.DisplayMember = "name";

list.ValueMember = "id";

list.NullText = "not selected";

list.SelectedValueChanged += list_SelectedValueChanged;

tb.Location = new Point(30, 70);

tb.Width = 100;

tb.Height = 25;

DataTable dt = new DataTable();

dt.Columns.Add("id", typeof(int));

dt.Columns.Add("name", typeof(string));

dt.Rows.Add(1, "one");

dt.Rows.Add(2, "two");

dt.Rows.Add(3, "three");

dt.Rows.Add(4, "four");

dt.Rows.Add(5, "five");

list.DataSource = dt;

b.Location = new Point(30, 110);

b.Width = 100;

b.Height = 25;

b.Text = "Get Selected Value";

b.Click += b_Click;

}

void b_Click(object sender, EventArgs e)

{

tb.Text = list.SelectedValue + " <----> " + list.SelectedText;

}

void list_SelectedValueChanged(object sender, EventArgs e)

{

tb.Text = list.SelectedValue + " <----> " + list.SelectedText;

}

General Discussions

answered on 23 Nov 2016

1 answer

213 views

Using two versions of UI at the same time.

We are interested in upgrading to the latest version of UI. Can we use the version of UI alongside an older version?

We are currently using UI for Winforms version 2011.2.11.0712.

Can we gradually upgrade our programs by including controls from the new version without interfering with controls using the older version?

General Discussions

answered on 23 Nov 2016

4 answers

183 views

Attach Image with Coumn Text in MultiColumnComboBox

Is there any way to attach a picture before text of any any column ?

Regards

MSA

MultiColumn ComboBox

answered on 23 Nov 2016

1 answer

149 views

Programatically cancel an insert

Is there a way to fully cancel a user insert of a new row programatically?

I am looking to simulate the user hitting the esc key once initiating an insert of a new row.

Thanks,

GridView

answered on 22 Nov 2016

1 answer

196 views

RowFormatting and ElementVisibility.Collapsed Problem

Hello everybody,

I have a problem using the element visibilty property on ElementVisibility.Collapsed on the radgridview RowFormatting event.

When i try to put the row visibility to ElementVisibility.Collapsed, there is a strange behavior, the rows are not correctly displayed.

Here is a sample that reproduces the problem :

Imports Telerik.WinControls.UI

Public Class RadForm1

Private _Liste As New List(Of MyClass1)

Public Sub New()

' Cet appel est requis par le concepteur.

InitializeComponent()

' Ajoutez une initialisation quelconque après l'appel InitializeComponent().

_Liste.Add(New MyClass1 With {.Prop1 = 10, .Prop2 = "AAA" & .Prop1})

_Liste.Add(New MyClass1 With {.Prop1 = 10, .Prop2 = "BBB" & .Prop1})

_Liste.Add(New MyClass1 With {.Prop1 = 10, .Prop2 = "CCC" & .Prop1})

_Liste.Add(New MyClass1 With {.Prop1 = 100, .Prop2 = "DDD" & .Prop1})

_Liste.Add(New MyClass1 With {.Prop1 = 100, .Prop2 = "FFF" & .Prop1})

_Liste.Add(New MyClass1 With {.Prop1 = 1, .Prop2 = "QQQ" & .Prop1})

_Liste.Add(New MyClass1 With {.Prop1 = 1, .Prop2 = "SSS" & .Prop1})

RadGridView1.DataSource = _Liste

End Sub

Private Sub RadGridView1_RowFormatting(sender As Object, e As RowFormattingEventArgs) Handles RadGridView1.RowFormatting

If DirectCast(e.RowElement.RowInfo.DataBoundItem, MyClass1).Prop1 = 10 Then

e.RowElement.Visibility = Telerik.WinControls.ElementVisibility.Collapsed

Else

e.RowElement.Visibility = Telerik.WinControls.ElementVisibility.Visible

End If

End Sub

Private Class MyClass1

Public Property Prop1 As Integer

Public Property Prop2 As String

End Class

Maybe i'm missing something, but when i replace Telerik.WinControls.ElementVisibility.Collapsed by Telerik.WinControls.ElementVisibility.Hidden, i have the expected behavior (except that the rows are not collapsed).

Thanks in advance for your answers, and sorry for my aweful english ... I'm french.

I'm using Windows 7 64 bits, with 2016.3.1024.40 version of radcontrols, and .Net Framework v4

GridView

answered on 22 Nov 2016

1 answer

267 views

Multiple styles for controls

Hi. I understand that we need to create new themes for each different appearance of a control (eg button) unless it's done in the designer etc.

It's of concern that each of the theme packets is pretty large eg 500k in size and seems an awful waste of disk space if a whole theme needs to be generated for the sake of a single control where, in my case, I'm using 4 - 5 different shaped/coloured buttons on a single form, this is the first one I'm changing to telerik out of several hundred forms in the application.

Am I understanding this correctly? Or is it possible to strip a theme packet down to cover a selection of controls with just what's needed by those controls?

If so then is it possible to add changing the functionality of the themes/visual designer to the 'wish list' for a future version please :)

Themes and Visual Style Builder

answered on 22 Nov 2016

5 answers

406 views

[Solved] An unhandled exception of type 'System.NullReferenceException' occurred in Telerik.WinControls.GridView.dll

Hello , I am Aung Ko .

I am getting the Null Reference exception in rad grid view , first i has been filled data in gridview after filling data may be one row or two row in which I has been clicked in Group Type Column in gridview at this time I has been seen Null Reference exception. I can't handled this exception. How can I do for this exception. Please , Suggest to me.

Thanks.

This is my sample project Link.

https://drive.google.com/file/d/0B0PjZMmehto4ZXl1dkRIa29qdG8/view?usp=sharing

GridView

answered on 21 Nov 2016

12 answers

307 views

Closing and reopening TabbedDocuments

I'm complete new to the Winforms. I use Progress/OpenEdge 11.6.

I build the "getting started" Example and tried to customize it.

My questions:

Is it possible to disable the context menu (Close, close all ...) for the last shown Tab, because I want one Tab always stay open?

Is it possible to float out a complete document container with all document windows in it?

When I autohide as Document, is it possible to put the information to the bottom of the form?

When I set the CloseAction to "Hide" is there a build in function to manage then hidden Documents?

Thank yout for answers

Jürgen

Dock

answered on 18 Nov 2016

1 answer

391 views

Add a header to RadGridView with Add, Edit, Delete buttons

I would like to add an Add, Edit and Delete buttons to the RadGridView, similar to what is seen in this ASP.NET Ajax control

http://demos.telerik.com/aspnet-ajax/grid/examples/data-editing/commanditem/defaultcs.aspx

Is this possible in WinForms without too much hassle? I am not a fan of the current appearance of just having RadButtons above.

GridView

answered on 18 Nov 2016

18 answers

425 views

Scroll to time

Hi,

Is there away to scroll to a particular time? I need to have a 24 hour day but scroll to a timeslot. Say 8 am and then if possible scroll to the next available time slot? Is this possible? I've seen some articles on the AJAX controls but hardly anything on winforms.

Thanks

Scheduler and Reminder

answered on 18 Nov 2016