Questions on UI for WinForms Forum

1 answer

147 views

Docking RadCheckedDropDownList in TableLayoutPanel 2018.2.515.40

Hello,

If I try to add RadCheckedDropDownList and dock it in TableLayoutPanel in newest version of UI for WinControls it crashes with following error (see code below)

var form = new Form();

var table = new TableLayoutPanel();

var list = new RadCheckedDropDownList();

list.Dock = DockStyle.Fill;

// Set dock causes System.ArgumentOutOfRangeException: 'Value of '-2147483648' is not valid for 'LargeChange'. 'LargeChange' must be greater than or equal to 0.

table.Controls.Add(list, 1, 0);

form.Controls.Add(table);

form.ShowDialog();

The problem is, I have application which has like 40 RadCheckedDropDownList, so any help will be appreciated.

Regards,

Mateusz

CheckedDropDownList

answered on 24 May 2018

7 answers

414 views

MajorTickInterval and CategoricalAxis

I create a BarSeries where the category is the sequence of integers 1, 2, 3, ...

then I change

MajorTickInterval = 10;

tick labels are drawn as 12 22 32 ...

Why not 10, 20, 30 ...?

ChartView

answered on 23 May 2018

5 answers

168 views

[Solved] RadTreeNode.Treeview Does not Return the Treeview

If I handle a RadTreeNode in this way:

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

{

private RadTreeNode m_myNode1;

private RadTreeNode m_myNode2;

public RadForm2()

{

InitializeComponent();

m_myNode1 = new RadTreeNode();

m_myNode2 = new RadTreeNode();

m_myNode1.Nodes.Add(m_myNode2);

radTreeView1.Nodes.Add(m_myNode1);

}

protected override void OnLoad(EventArgs e)

{

base.OnLoad(e);

var treeview1 = m_myNode1.TreeView;

if (treeview1 == null)

throw new InvalidOperationException();

//var x = m_myNode2.TreeViewElement; this solves the problem, by calling FindTreeView internally

var treeview2 = m_myNode2.TreeView;

if (treeview2 == null)

throw new InvalidOperationException();

}

The second Exception is thrown.

The workaround is in the comment, if you call m_myNode2.TreeViewElement or m_myNode2.Nodes before, everything works fine,

anything that causes internally a call to "TreeViewElement" or "FindTreeView" (i digged a bit in the source code).

So this happens only on Nodes, without Childnodes and not for Rootnodes.

It's more a Bug-Report than a Question, but don't know where to Post ist.

If the TreeView Property is the first Property called, on a RadTreeNode, it always has the value null.

Treeview

answered on 23 May 2018

5 answers

253 views

Non-standard behavior RadChartView

I create chart as follows:

var barModel = new BarSeries
{
ValueMember = "Model",
CategoryMember = "N"
};
radChartViewGss.Series.Add(_barModel);
var barWellModel = new BarSeries
{
ValueMember = "WellModel",
CategoryMember = "N"
};
radChartViewGss.Series.Add(barWellModel);

...creating and filling a table (DataTable gssTable)

radChartViewGss.DataSource = gssTable;

... and show table
radGridViewGss.DataSource = gssTable;

Everything works great.

Then I want to change the data:
radChartViewGss.DataSource = null;

radGridViewGss.DataSource = null;

gssTable.BeginLoadData();
gssTable.Rows.Clear();

... filling a table (gssTable)

gssTable.EndLoadData();
gssTable.AcceptChanges();

During the data modification process, the radGridView is not updated, but radChartView constantly tries to update itself. As a result, everything works very slowly.

Why two similar component behave differently when data source disconnected?

I know how programmatically I can disable this behavior of the chart. But this should be done automatically!!! If there is no data source, the chart is not drawn

ChartView

answered on 23 May 2018

1 answer

565 views

Student Licence

Hello,

Will I be able to sell my app developed using my Telerik DevCraft Ultimate License

(Complimentary Developer License - Student Edition)?

*Commercial Use

General Discussions

answered on 22 May 2018

2 answers

205 views

Telerik RadWizard Example 1 not working

Hello,

I'm developing a new app using telerik radwizard, using the example found at

https://docs.telerik.com/devtools/wpf/controls/radwizard/features/pages

However, when i try to run my application, i get an empty window:

I don't know what I'm doing wrong, can someone help me?

Source code bellow:

<Window x:Class="MainWindow.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

xmlns:wizard="clr-namespace:Telerik.Windows.Controls.Wizard assembly=Telerik.Windows.Controls.Navigation"

Title="MainWindow"

WindowState="Normal"

WindowStartupLocation="CenterScreen"

WindowStyle="None"

Background="#dee3e9">

<telerik:RadWizard x:Name="radWizard" >

<telerik:RadWizard.WizardPages>

<telerik:WizardPage Content="My Wizard Page Content" SideHeaderWidth="100" HeaderHeight="100">

<telerik:WizardPage.HeaderTemplate>

<DataTemplate>

<Image Source="Images/BrandMark_Telerik_Black.png" Width="200" Height="100" />

</DataTemplate>

</telerik:WizardPage.HeaderTemplate>

<telerik:WizardPage.SideHeaderTemplate>

<DataTemplate>

<TextBlock Text="My Side Header" />

</DataTemplate>

</telerik:WizardPage.SideHeaderTemplate>

<telerik:WizardPage.FooterTemplate>

<DataTemplate>

<StackPanel Orientation="Horizontal">

<telerik:RadButton Content="Back"

Width="70" Height="25"

Command="wizard:RadWizardCommands.MoveCurrentToPrevious"

CommandParameter="{Binding}" />

<telerik:RadButton Content="Next" Width="70" Height="25"

Command="wizard:RadWizardCommands.MoveCurrentToNext"

CommandParameter="{Binding}" />

</StackPanel>

</DataTemplate>

</telerik:WizardPage.FooterTemplate>

</telerik:WizardPage>

</telerik:RadWizard.WizardPages>

</telerik:RadWizard>

</Window>

Wizard

answered on 22 May 2018

4 answers

177 views

Properties order

Hello

I`ve the following class properties. But they are not orderd using Display-Order. Is it possible to order properties by another way?

[Display(Name = "Field2", Order = 2)]

public string Field2

{

get; set;

}

[Display(Name = "Field3", Order = 3)]

public string Field3

{

get; set;

}

[Display(Name = "Field1", Order = 1)]

public int Field1

{

get; set;

}

DataEntry

answered on 22 May 2018

13 answers

2.0K+ views

Set background and forecolor of a checked item row of checkedbox list control

Hi,

I am looking for a sample code to set the background and fore color of a checkedlistbox control. I want to set fore color as green and background as red if the item is checked . The font style also needs to be changed to bold if the item is checked. Whenever any user the checked any row it has to be highlighted and formatted to according to my need. The same checkedlistbox can have more than one checked rows so all these rows can be in the desired format. I am programatically binding the sql datasource.

Thanks in advance

Sarin

CheckedListBox

answered on 22 May 2018

6 answers

304 views

[Solved] ToolTip on RadForm TitleBar elements

I need to show tooltips on the elements of a RadForm TitleBar, like in the attached image.

things I've tried that didn't work:

setting the ToolTipText

this.FormElement.TitleBar.SystemButtons.Children[0].ToolTipText = "this is a tooltip";

using the ToolTipTextNeeded form event

class TestTooltipForm : RadForm

{

public TestTooltipForm()

{

InitializeComponent();

this.ToolTipTextNeeded += (sender, args) =>

{

args.ToolTipText = "a tooltip";

};

}

The only thing that seems to be working is instantiating a RadToolTip and showing it inside del ToolTipTextNeeded (ignoring the args parameter)

The problem with this method is that the tooltip stays visible forever, so I need to hide it on some event like 'form_mouseHover' which is kind of convoluted.

Is there a better way?

General Discussions

answered on 21 May 2018

1 answer

193 views

Themed RadButton click visual appearance on TouchScreen

Hello,

I am using a RadButton with a touch theme and when I tap it on a touchscreen, the visual appearance of the button (to show a click occured) doesn't show. It shows if I use a mouse and click the button. When using a touchscreen the button remains flat with no visual that I tap on it.

I use Telerik WinForms 2013 Q3 1328

Is there a solution for that?

Thanks,

Buttons, RadioButton, CheckBox, etc

answered on 21 May 2018