Questions on UI for WinForms Forum

1 answer

754 views

CommandColumn - Where can we set Button's Text

Please take a look at this example :

Change the appearance of the buttons in GridViewCommandColumn

I want to create buttons with `Delete` text of every buttons.

But when i create a CommandColumn in GridView text of every button is empty.

Where can we set Button's Text?

Thanks in advance

GridView

answered on 26 Mar 2019

0 answers

70 views

Raddropdownlist automatically clears text when it is entered with no correct options

After binding the data, what do I do when I automatically empty the text in the raddropdownlist control as soon as I type the wrong option?

I used the following code to customize the raddropdownlist control, but it didn't work

Public Class clsHYCombo
Inherits Telerik.WinControls.UI.RadDropDownList

Public Property RestrictContentToListItems As Boolean = True

Protected Overrides Sub OnValidating(e As System.ComponentModel.CancelEventArgs)
If RestrictContentToListItems AndAlso Me.Items.Count > 0 Then
Dim index As Integer = Me.FindString(Me.Text)
If index > -1 Then
Me.SelectedIndex = index
Else
e.Cancel = True
Me.Text = ""
'Beep()
End If
End If
MyBase.OnValidating(e)
End Sub

'Protected Overrides Sub OnKeyPress(ByVal e As KeyPressEventArgs)
' MyBase.OnKeyPress(e)
' If RestrictContentToListItems AndAlso Me.Items.Count > 0 Then
' Dim index As Integer = Me.FindString(Me.Text)
' If index > -1 Then
' Me.SelectedIndex = index
' Else
' Me.Text = ""
' 'Beep()
' End If
' End If
'End Sub

'Protected Overrides Sub OnTextChanged(ByVal e As EventArgs)
' MyBase.OnTextChanged(e)
' If RestrictContentToListItems AndAlso Me.Items.Count > 0 Then
' Dim index As Integer = Me.FindString(Me.Text)
' If index > -1 Then
' Me.SelectedIndex = index
' Else
' Me.Text = ""
' 'Beep()
' End If
' End If
'End Sub

End Class

DropDownList

asked on 26 Mar 2019

2 answers

78 views

How to make the column controlled by the control GridView display three decimal numbers

Hello everyone,

When I use the GridView control, if a column is decimal, it can only display two decimals, and the third one rounds; but this is not what I want, I want it to display

three or four decimals, and I don't know how to solve it.

GridView

answered on 25 Mar 2019

0 answers

64 views

RadMenu Interface Display Problem

Hello everyone,

When I use the RadMenu control Add New Item, after opening a Form1 through the menu item, the interface Form1 is displayed on the display every time

behind the main interface. This is not what I want; I want it to be displayed in front of the main interface.I hope everyone can help me, thank you.

Menu

asked on 25 Mar 2019

1 answer

65 views

Error when editing the properties of the type size

we have the following property:

private Size _picSize = new Size(1272, 787);

public Size PicSize
{
get => _picSize;
set => value;

}

if in the radpropertygrid for this property to remove the height and semicolon, press <enter>, an error occurs:

System.ArgumentException: Не удается разобрать текст "1000". Ожидаемый формат текста: "Width,Height".
в System.Drawing.SizeConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
в Telerik.WinControls.UI.PropertyGridItem.ConvertValue(Object value, Object& convertedValue)
в Telerik.WinControls.UI.PropertyGridItem.set_Value(Object value)
в Telerik.WinControls.UI.PropertyGridTableElement.EndEditCore(Boolean commitChanges)
в Telerik.WinControls.UI.PropertyGridTextBoxEditor.OnLostFocus()

PropertyGrid

answered on 22 Mar 2019

2 answers

230 views

Listview Icon View Problem

Hi,

I have been trying to make the icon view more of a tile view however when I try and do the back colour it does a gradient fill instead. See attachment

Form Code

this.radListView2.ViewType = ListViewType.IconsView;

this.radListView2.ItemSize = new Size(300, 120);

this.radListView2.ItemSpacing = 10;

this.radListView2.AllowEdit = false;

this.radListView2.EnableFiltering = true;

this.radListView2.HotTracking = false;

this.radListView2.RootElement.BackColor = Color.Transparent;

this.radListView2.BackColor = Color.Transparent;

this.radListView2.ListViewElement.DrawFill = false;

this.radListView2.ListViewElement.ViewElement.BackColor = Color.Transparent;

this.radListView2.RootElement.EnableElementShadow = false;

}

private void radListView2_VisualItemCreating(object sender, ListViewVisualItemCreatingEventArgs e)

{

if (e.VisualItem is IconListViewVisualItem)

{

e.VisualItem = new PeopleListIcon();

}

PeopleListIcon Code

using System;

using HRSystem.HRDataCentre;

using System.Collections.Generic;

using System.Drawing;

using System.Reflection;

using System.Text;

using Telerik.WinControls;

using Telerik.WinControls.UI;

using System.Linq;

using Telerik.WinControls.Layouts;

namespace HRSystem.New_Element

{

public class PeopleListIcon : IconListViewVisualItem

{

protected override Type ThemeEffectiveType

{

get

{

return typeof(IconListViewVisualItem);

}

LightVisualElement RoleName = new LightVisualElement();

LightVisualElement RoleType = new LightVisualElement();

LightVisualElement PersonName = new LightVisualElement();

LightVisualElement Duration = new LightVisualElement();

LightVisualElement Active = new LightVisualElement();

private StackLayoutElement verticalContainer = new StackLayoutElement();

private StackLayoutElement roomHeaderContainer = new StackLayoutElement();

private StackLayoutElement roomFooterContainer = new StackLayoutElement();

protected override void CreateChildElements()

{

base.CreateChildElements();

verticalContainer.Orientation = System.Windows.Forms.Orientation.Vertical;

verticalContainer.NotifyParentOnMouseInput = true;

verticalContainer.ShouldHandleMouseInput = false;

verticalContainer.StretchHorizontally = true;

verticalContainer.StretchVertically = true;

roomHeaderContainer.Orientation = System.Windows.Forms.Orientation.Horizontal;

roomHeaderContainer.NotifyParentOnMouseInput = true;

roomHeaderContainer.ShouldHandleMouseInput = false;

roomHeaderContainer.Children.Add(RoleName);

roomHeaderContainer.Children.Add(RoleType);

roomHeaderContainer.StretchHorizontally = true;

RoleName.NotifyParentOnMouseInput = true;

RoleName.ShouldHandleMouseInput = false;

RoleName.StretchHorizontally = true;

RoleName.CustomFont = "Roboto";

RoleName.CustomFontSize = 9;

RoleName.CustomFontStyle = FontStyle.Bold;

RoleName.Margin = new System.Windows.Forms.Padding(5, 10, 0, 0);

RoleName.TextAlignment = System.Drawing.ContentAlignment.MiddleLeft;

RoleType.NotifyParentOnMouseInput = true;

RoleType.ShouldHandleMouseInput = false;

RoleType.StretchHorizontally = false;

RoleType.CustomFont = "Roboto";

RoleType.CustomFontSize = 9;

RoleType.CustomFontStyle = FontStyle.Regular;

RoleType.Margin = new System.Windows.Forms.Padding(0, 5, 5, 0);

roomFooterContainer.Orientation = System.Windows.Forms.Orientation.Horizontal;

roomFooterContainer.NotifyParentOnMouseInput = true;

roomFooterContainer.ShouldHandleMouseInput = false;

roomFooterContainer.StretchHorizontally = true;

roomFooterContainer.DrawFill = true;

roomFooterContainer.BackColor = Color.White;

roomFooterContainer.GradientStyle = GradientStyles.Solid;

roomFooterContainer.MinSize = new System.Drawing.Size(0, 30);

PersonName.TextImageRelation = System.Windows.Forms.TextImageRelation.ImageBeforeText;

PersonName.StretchHorizontally = false;

PersonName.Layout.LeftPart.Padding = new System.Windows.Forms.Padding(24, 0, 8, 0);

PersonName.Alignment = System.Drawing.ContentAlignment.MiddleCenter;

PersonName.NotifyParentOnMouseInput = true;

PersonName.ShouldHandleMouseInput = false;

PersonName.CustomFont = "Roboto";

PersonName.CustomFontSize = 12;

PersonName.CustomFontStyle = FontStyle.Regular;

Duration.NotifyParentOnMouseInput = true;

Duration.ShouldHandleMouseInput = false;

Duration.StretchVertically = true;

Active.StretchVertically = true;

roomFooterContainer.Children.Add(Duration);

roomFooterContainer.Children.Add(Active);

Active.NotifyParentOnMouseInput = true;

Active.ShouldHandleMouseInput = false;

Active.StretchHorizontally = false;

Active.TextImageRelation = System.Windows.Forms.TextImageRelation.ImageBeforeText;

Active.CustomFont = "Roboto";

Active.CustomFontSize = 9;

Active.CustomFontStyle = FontStyle.Regular;

Duration.TextImageRelation = System.Windows.Forms.TextImageRelation.ImageBeforeText;

Duration.CustomFont = "Roboto";

Duration.CustomFontSize = 9;

Duration.CustomFontStyle = FontStyle.Regular;

Duration.Margin = new System.Windows.Forms.Padding(5, 0, 0, 0);

Duration.StretchHorizontally = false;

verticalContainer.Children.Add(roomHeaderContainer);

verticalContainer.Children.Add(PersonName);

verticalContainer.Children.Add(roomFooterContainer);

this.Children.Add(this.verticalContainer);

}

protected override void SynchronizeProperties()

{

base.SynchronizeProperties();

this.DrawText = false;

this.BackColor = Color.White;

this.DrawFill = true;

this.DrawBorder = false;

RoleName.Margin = new System.Windows.Forms.Padding(8, 8, 0, 0);

RoleType.ImageLayout = System.Windows.Forms.ImageLayout.None;

PersonName.Margin = new System.Windows.Forms.Padding(24, 0, 0, 0);

PersonName.Layout.LeftPart.Margin = new System.Windows.Forms.Padding(0, 0, 5, 0);

PersonName.StretchHorizontally = true;

PersonName.ImageAlignment = ContentAlignment.MiddleLeft;

PersonName.TextAlignment = ContentAlignment.MiddleLeft;

Duration.Layout.LeftPart.Margin = new System.Windows.Forms.Padding(0, -3, 0, 0);

Duration.ForeColor = Color.FromArgb(200, 0, 0, 0);

Active.ForeColor = Color.FromArgb(200, 0, 0, 0);

Active.Layout.LeftPart.Margin = new System.Windows.Forms.Padding(0, -3, 0, 0);

People Person = this.Data.DataBoundItem as People;

if (Person != null)

{

RoleName.Text = Person.Roles.Any() ? Person.Roles.FirstOrDefault().RoleTitle : "No Role";

RoleType.Text = Person.Roles.Any() ? Person.Roles.FirstOrDefault().Type.Description : "";

PersonName.Text = Person.Forename + " " + Person.Surname;

int age = Person.Roles.Any() ? Function.GetAge(Person.Roles.FirstOrDefault().StartDate) : 0;

Duration.Text = age + " years";

RoleName.ForeColor = Color.FromArgb(190, 0, 0, 0);

RoleType.ForeColor = Color.Black;

PersonName.ForeColor = Color.Black;

if (RoleType.Text == "Staff" || RoleType.Text == "Volunteer")

{

this.BackColor = Color.FromArgb(247, 247, 247);

}

else

{

this.BackColor = Color.FromArgb(170, 13, 13);

}

else

{

PersonName.Text = "Free Room";

Duration.Text = "0 days";

this.BackColor = Color.DarkRed;

RoleName.ForeColor = Color.White;

RoleType.ForeColor = Color.White;

PersonName.ForeColor = Color.White;

}

ListView

answered on 22 Mar 2019

1 answer

97 views

Restore selected/expanded row under column grouping

Hello,

I've posted a thread about save/restore row 2 months ago. It worked great until I grouped a column.

When a column is grouping, the row index that I save/restore is the index in the grouping zone where the row located. When I load this row index to the gridview, every grouping zone will take over this row index. For example if I save a selected row, when I reload its index, all rows which has this index in every grouping zone will be selected.

If you would like to test, check out the demo in my old post (Hristo's answer):

https://www.telerik.com/forums/restore-selected-tab-in-hierarchy-child-page-view-after-data-refresh

Thank you by advance for your help.

Regards,

GridView

answered on 22 Mar 2019

1 answer

102 views

Drag Drop from Toolbox

Hi.

What is the best way to react to a shape being drag-dropped onto the diagram from the toolbox?

The toolbox is in an additional form.

Regards

Bernhard

Diagram, DiagramRibbonBar, DiagramToolBox

answered on 21 Mar 2019

1 answer

914 views

For sidebar menu which control of telerik should i use

Please take a look at attached image...

For the left side bar menu on that image which control of telerik should i use?

Would you please lead me to examples of that?

Thanks in advance

Menu

answered on 20 Mar 2019

3 answers

193 views

Errors after controls updated

Hi

I've recently released a version of our software that had version 2019.1.117.40 of Telerik.

Soon afterwards I needed to reformat and rebuild my working environment, reinstall visual studio and telerik and received a telerik version error after loading up my solution. So I ran an upgrade which installed 2019.1.219.40.

After this I started experiencing errors in the Virtual Grid. Last week I added a thread to the forum about access violations when calling bestfit on a column, it was suggested that my code should wait until the form is loaded/shown before doing this.In version 2019.1.117.40 I hadn't experienced this problem despite all the hours I'd spent developing and testing.

The form in question contains a panel which is parented onto a host form, so it never receives a formshown event, I use the hostform shown event to call the code on the child. But, the child panel contains a pageview with 4 pages, each of which contains a virtual grid. Even though the form is visible, I'm experiencing that same access violation on the first page of data.

Now, I'm seeing another problem which I didn't experience in 2019.1.117.40, when I attempt to change the sort order.

"Collection was modified; enumeration operation may not execute"

   at System.Collections.ArrayList.ArrayListEnumeratorSimple.MoveNext()
   at Telerik.WinControls.UI.VirtualGridRowElement.<GetCellElements>d__0.MoveNext()
   at Telerik.WinControls.UI.VirtualGridRowElement.SynchronizeCells(Boolean updateContent)
   at Telerik.WinControls.UI.VirtualGridRowElement.Synchronize(Boolean updateContent)
   at Telerik.WinControls.UI.VirtualGridTableElement.SynchronizeRows(Boolean recursive, Boolean updateContent)
   at Telerik.WinControls.UI.VirtualGridTableElement.OnViewInfoPropertyChanged(Object sender, PropertyChangedEventArgs e)
   at Telerik.WinControls.RadObject.OnNotifyPropertyChanged(PropertyChangedEventArgs e)
   at Telerik.WinControls.UI.VirtualGridViewInfo.OnNotifyPropertyChanged(PropertyChangedEventArgs e)
   at Telerik.WinControls.RadObject.OnNotifyPropertyChanged(String propertyName)
   at Telerik.WinControls.UI.VirtualGridViewInfo.set_IsWaiting(Boolean value)
   at pulse.move.views.Helpers.MemberSelection.VirtualGridHandlerClassBase.WaitCursor(Boolean showWaiting) in W:\Projects\pulse.smartcentre.root\pulse.smartcentre\pulse.move.views\Helpers\MemberSelection\VirtualGridHandlerClass.Base.cs:line 1059
   at pulse.move.views.Helpers.MemberSelection.VirtualGridHandlerClassBase.AskForData(Int32 pageIndex) in W:\Projects\pulse.smartcentre.root\pulse.smartcentre\pulse.move.views\Helpers\MemberSelection\VirtualGridHandlerClass.Base.cs:line 1009
   at pulse.move.views.UserCentre.Tabs.GridHandlers.UserCentreVirtualGridHandler.AskForData(Int32 pageIndex) in W:\Projects\pulse.smartcentre.root\pulse.smartcentre\pulse.move.views\UserCentre\Tabs\GridHandlers\UserCentreVirtualGridHandler.cs:line 94
   at pulse.move.views.Helpers.MemberSelection.VirtualGridHandlerClassBase.OnMasterViewSortChanged() in W:\Projects\pulse.smartcentre.root\pulse.smartcentre\pulse.move.views\Helpers\MemberSelection\VirtualGridHandlerClass.Base.cs:line 847
   at pulse.move.views.Helpers.MemberSelection.VirtualGridHandlerClassBase.OnSortChanged(Object sender, VirtualGridEventArgs e) in W:\Projects\pulse.smartcentre.root\pulse.smartcentre\pulse.move.views\Helpers\MemberSelection\VirtualGridHandlerClass.Base.cs:line 865
   at Telerik.WinControls.UI.RadVirtualGridElement.OnSortDescriptorsChanged(VirtualGridViewInfo viewInfo)
   at Telerik.WinControls.UI.VirtualGridViewInfo.sortDescriptors_CollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
   at Telerik.Collections.Generic.NotifyCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
   at Telerik.Collections.Generic.NotifyCollection`1.EndUpdate(Boolean notify)
   at Telerik.WinControls.UI.VirtualGridInputBehavior.HandleMouseUp(MouseEventArgs args)
   at Telerik.WinControls.UI.RadVirtualGrid.OnMouseUp(MouseEventArgs e)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at Telerik.WinControls.RadControl.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)