Questions on UI for WinForms Forum

0 answers

201 views

Scroll Bar get disappear when change the display setting

Hi Experts,

I am using Telerik.Windows.Controls.GridView , version - 2011.3.1220.40.

I am having problem with scroll bar when I change my machine's display setting from 100% to 125%.

Initially scroll bar appears on the screen, but when I scroll down to bottom and try to scroll more (as it has more rows), scroll bar gets disappear.
I have attached screenshot. Also I have attached Grid Control we have used.

here is the grid control I have used-

<telerik:RadGridView x:Name="xyzResultsGridView"

Controls:StyleManager.Theme="Office_Blue"

AutomationProperties.AutomationId="xyzResultsGridView"

AutoGenerateColumns="False"

AutoExpandGroups="True"

CanUserFreezeColumns="False"

AllowDrop="False"

CanUserDeleteRows="False"

ActionOnLostFocus="None"

AreRowDetailsFrozen="True"

CanUserInsertRows="False"

ClipToBounds="True"

IsScrolling="False"

UseLayoutRounding="True"

SelectionMode="Extended"

ClipboardPasteMode="Default"

IsReadOnly="True"

IsFilteringAllowed="False"

VirtualizingStackPanel.IsVirtualizing="True"

VirtualizingStackPanel.VirtualizationMode="Recycling"

MaxWidth="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Grid}}, Path=ActualWidth}"

Focusable="False"

>

<telerik:RadGridView.RowStyle>

<Style TargetType="GridView:GridViewRow">

<Setter Property="Foreground" Value="{Binding Converter={StaticResource RowToColorConverter},ConverterParameter=.}">

</Setter>

<Setter Property="FontWeight" Value="{Binding Converter={StaticResource RowToFontWeightConverter},ConverterParameter=.}">

</Setter>

</Style>

</telerik:RadGridView.RowStyle>

<Navigation:RadContextMenu.ContextMenu>

<Navigation:RadContextMenu x:Name="xyzResultsGridContextMenu" Opened="xyzResultsGridContextMenu_Opened"

ItemClick="xyzResultsGridViewContextMenuItemClick"

ItemContainerStyle="{StaticResource EnableStyle}"

ItemTemplate="{StaticResource MenuItemTemplate}">

</Navigation:RadContextMenu>

</Navigation:RadContextMenu.ContextMenu>

<telerik:RadGridView.GroupHeaderTemplate>

<DataTemplate>

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition/>

</Grid.ColumnDefinitions>

<TextBlock Text ="{Binding GroupDescriptor.Column.Header}" Margin="1,0,0,0" Grid.Column="0" />

<TextBlock Text=": " Margin="1,0,0,0" Grid.Column="1"/>

<TextBlock Text= "{Binding Header}" Margin="1,0,0,0" Grid.Column="2" />

</Grid>

</DataTemplate>

</telerik:RadGridView.GroupHeaderTemplate>

</telerik:RadGridView>

Can you please help me ?
Thanks,
Ritesh

GridView

asked on 17 Sep 2013

3 answers

644 views

Object reference not set to an instance of an object. at Telerik.WinControls.UI.GridViewEditManager.OnPositionChanging

Telerik.WinControls.GridView version 2012.3.1211.20

Hi Everyone,

I am using GridView's RowSourceNeeded to populate child table when [+] is clicked... it works fine when initial load, however when master table gets refreshed by assigning the DataSource to different collection, it throws following error when [+] is clicked to populate child table.
It seems the child table was populated OK, but it still throws the exception anyway.

Any help/suggestions/ideas are appreciated greatly. Thank you.

System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.WinControls.UI.GridViewEditManager.OnPositionChanging(PositionChangingEventArgs args)
   at Telerik.WinControls.UI.GridViewEditManager.Telerik.WinControls.UI.IGridViewEventListener.PreProcessEvent(GridViewEvent eventData)
   at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode)
   at Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent)
   at Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()
   at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewEvent gridEvent)
   at Telerik.WinControls.UI.GridViewSynchronizationService.RaiseCurrentChanged(GridViewTemplate template, GridViewRowInfo row, GridViewColumn column, Boolean user)
   at Telerik.WinControls.UI.GridViewRowInfo.OnIsCurrentPropertyChanging(PropertyChangingEventArgsEx args)
   at Telerik.WinControls.UI.GridViewRowInfo.OnPropertyChanging(PropertyChangingEventArgsEx args)
   at Telerik.WinControls.UI.GridViewHierarchyRowInfo.OnPropertyChanging(PropertyChangingEventArgsEx args)
   at Telerik.WinControls.UI.GridViewRowInfo.SetBooleanProperty(String propertyName, Int32 propertyKey, Boolean value)
   at Telerik.WinControls.UI.MasterGridViewTemplate.ChangeCurrentRow(GridViewRowInfo oldRow, GridViewRowInfo row, GridViewTemplate viewTemplate)
   at Telerik.WinControls.UI.MasterGridViewTemplate.SetPositionCore(GridViewRowInfo newRow, GridViewColumn newColumn, GridViewRowInfo oldRow, GridViewColumn oldColumn, Boolean validateRowChange)
   at Telerik.WinControls.UI.MasterGridViewTemplate.SetPosition(GridViewRowInfo row, GridViewColumn column, Boolean validateRowChange)
   at Telerik.WinControls.UI.MasterGridViewTemplate.ProcessCurrentChanged(GridViewEvent eventData)
   at Telerik.WinControls.UI.MasterGridViewTemplate.ProcessEventCore(GridViewEvent eventData)
   at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode)
   at Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent)
   at Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()
   at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewEvent gridEvent)
   at Telerik.WinControls.UI.GridViewSynchronizationService.RaiseCurrentChanged(GridViewTemplate template, GridViewRowInfo row, GridViewColumn column, Boolean user)
   at Telerik.WinControls.UI.BaseGridNavigator.SelectCore(GridViewRowInfo row, GridViewColumn column)
   at Telerik.WinControls.UI.GridRowBehavior.SelectPositionOnMouseDownLeft(MouseEventArgs e, GridRowElement rowElement, GridCellElement cellElement)
   at Telerik.WinControls.UI.GridRowBehavior.OnMouseDownLeft(MouseEventArgs e)
   at Telerik.WinControls.UI.GridRowBehavior.OnMouseDown(MouseEventArgs e)
   at Telerik.WinControls.UI.BaseGridBehavior.OnMouseDown(MouseEventArgs e)
   at Telerik.WinControls.UI.RadGridView.OnMouseDown(MouseEventArgs e)
   at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at Telerik.WinControls.RadControl.WndProc(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)

GridView

answered on 17 Sep 2013

4 answers

171 views

I' Can't create subGrid

Hello people:

I tried to create my first subird with winforms and I have not gotten.

I created the "radgrid1" and chose the datasource. Good.
Later i created the template and chose the DataSource.
Later i created the relation, parent = grid and select column id; child = template and selected column jwId.

Them, when the next line fire, i get a error "GridViewEventDataProvider can not be applied to bound GridViewTemplate"

this.radGridView1.Templates[0].HierarchyDataProvider = new GridViewEventDataProvider(this.radGridView1.Templates[0])

What it's the problem?

GridView

answered on 17 Sep 2013

2 answers

421 views

GridView CellValidating event fires more than once

Hi Everyone,

I have a problem with CellValidating event.

GridView CellValidating event fires more than once when NewRowEnterKeyMode property sets to RadGridViewNewRowEnterKeyMode.EnterMovesToNextCell.

I have messagebox in CellValidating event to check the value could not be empty.
when I try press enter key to leave cell, CellValidating event fires Twice. While there is a need a time validate. as a result messgebox shown Twice

please pay attention only when

1. NewRowEnterKeyMode sets to RadGridViewNewRowEnterKeyMode.EnterMovesToNextCell
2. Press Enter Key to move next cell ( Tab Key behavior is great)

I am very grateful everyone help me.
Thank You.

GridView

answered on 17 Sep 2013

1 answer

298 views

[Solved] Saving gridview with combobox columns giving null values

Hello Telerik Team,
i have some issues with the comobobox column of radgridview for winforms

here is the below code

                GridViewComboBoxColumn colLithography = new GridViewComboBoxColumn();
                colLithography.DataType = typeof(string);
                colLithography.DataSource = dt; // dt is having only one Column called Name
                colLithography.HeaderText = "Lithography";
                colLithography.ValueMember = "Name";
                colLithography.DisplayMember = "Name";
                colLithography.FieldName = "Name";
                //colLithography.DataType=
                this.rGVPP.Columns.Insert(2, colLithography); // rGVPP is Radgridview

Above code perfectly added the values to the combobox

but now i want to save the gridview data to database,

So in Btn_Save click i am reading sending the gridview values to a query like below, observe the debug at break point which is the code
and in the quick watch window the value is null, throwing exception here

but my grid having values in all the cell, when i try to read the value of a particular cell of combobox column, its giving null value.

Please help me.

GridView

answered on 17 Sep 2013

3 answers

121 views

MiniToolbar in Ribbon Application

Hi ,

We need the MiniToolbar for our application.
Where can we find information about RadRibbonBar and MiniToolbar ?

I hope you will be able to provide the information.

Stefano.

General Discussions

answered on 17 Sep 2013

1 answer

138 views

RadGridView - Custom sorting issue

Hi,

I am using Telerik RadGridView in our project.

This GridView will have dropdown columns.  While doing sorting it sorts based on dropdown list item's Id instead of Display text.

So i am doing custom sorting to sort based on display member. It works fine.

If the record count is huge say for example more than 10,000 application is not responding.

Is there any workaround for this issue ?

Thanks

Balaji

GridView

answered on 16 Sep 2013

3 answers

378 views

RadCalendar current month and year

Hi,

is there a way to know the current month and year in the RadCalendar ViewChanged event?

Thanks in advance.

Esteban Diaz
Software Analist

Calendar, DateTimePicker, TimePicker and Clock

answered on 16 Sep 2013

6 answers

315 views

Visibilty of text in RadStatusStrip Item (RadLabelElement)

Hi,

I am using RadStatusStrip on a form and it has three RadLabelElement on it, these labels are used to display text and images at run-time. All three have spring property set to true and there are two separators in between them. Now the problem is, when a text is added at run time to a label and this text has a size larger than the current width of the label, the text exceeds from the width of the label and overlaps on the next label area i.e. the exceeded part of text is displayed on the separator and on next label area. I tried to handle it with different values of RadLabelElement property TextWrap but of no use. Also the back color of the RadLabelElement is set to transparent. Can you please give me any solution for that. I need that the exceeded part of the text, whose length is greater than label's width, is not displayed instead only initial part of that text is displayed (as same behavior found in the vs.net's status strip control.

Thanks and regards,

Hassan

StatusStrip

answered on 16 Sep 2013

3 answers

69 views

Putting Office2020Silver theme in GAC

Hi,

I'm working on an add-in for Microsoft Office and use a lot of Telerik components for the custom UI.
To have all these Telerik controls look and feel like the rest of Office, I apply a theme at runtime, depending on which color scheme the user have set for Office. And on Development machines this works like a charm - change the color of Office and my add-in changes with it.
For distributing to end-users I want to put the theme assemblys in the GAC, as I have to be sure that these theme assemblies can be found run-time, as they are loaded when needed.
Putting the theme dll's in the GAC works fine for the Office2010Blue and the Office2010Black themes, but nothing happens when I try to deploy Office2010Silver to the GAC - and not even when using gacutil. I'm using Telerik 2013.1.220.40, VS2012 and .NET 4.5.

Hope you can help me out here, as the add-in doesn't if it can't find the theme assemblies at run-time.

Best regards
Thomas

General Discussions

answered on 16 Sep 2013