Questions on UI for WinForms Forum

2 answers

77 views

ShowLabels on Drill down line series giving object reference not set to an instance of an object

Hi team ,

I am using Telerik UI for winforms Chartview Drill down charts. I am using line series . I need to get the labels on top of every value( please refer attached screenshot of demo app) but getting object reference not set to an instance of an object .particularly in line series.ShowLabels = true; Can you please guide on this?

If I set

series.DataSource = DrillDownViewModel.ParseDataByDay(year, month);
series.ShowLabels = true;
series.DrawLinesToLabels = true;
series.SyncLinesToLabelsColor = false;

Thanks

Anup

ChartView

answered on 27 Dec 2023

1 answer

115 views

RadMessageBox auto close

Hi,

I'm wondering if it could be possible to add an auto close functionnality on RadMessageBox ?

- With a formattable string like this : "Popup will close in {0} seconds"

- We should be able to specify a duration in seconds

- It would only be useable if the MessageBox is not a YesNo(Cancel)

Using an internal timer, the MessageBox would update the formattable string at each tick.

I think it can easily be achieved.

Thanks.

MessageBox

answered on 22 Dec 2023

1 answer

80 views

windowsstorelauncher.exe

Trying to run UI for Winforms examples for a user and we have the store locked down. When I run it on the machine I get a popup stating it wants to run this

C:\Program Files\WindowsApps\Telerik.TelerikUIFormsExamples_202...\windowsstorelauncher.exe

Network location cannot be reached.

Does it require the store to be enabled? This is after install and just trying to run it. Yes, we can install it without issues.

General Discussions

answered on 22 Dec 2023

1 answer

143 views

customizing default filters in Radgridview windows forms

Hi I am working on Radgridview where on a particular column I have hidden few options like below.

Private Sub grd_ContextMenuOpening(sender As Object, e As ContextMenuOpeningEventArgs) Handles grd.ContextMenuOpening
        Dim i As Integer = 0
        Dim IgnoreOperator() As String = {"Ends with", "Equals", "not equal to", "no filter"}
        If DirectCast(e.ContextMenuProvider, Telerik.WinControls.UI.GridCellElement).ColumnInfo.FieldName = "AcctNbr" Then
            While i < e.ContextMenu.Items.Count
                If Not IgnoreOperator.Contains(e.ContextMenu.Items(i).Text, StringComparer.CurrentCultureIgnoreCase) Then
                    e.ContextMenu.Items(i).Visibility = Telerik.WinControls.ElementVisibility.Collapsed
                End If
                i = i + 1
            End While
        End If
    End Sub

My requirement is to search data from a different a column of Dataview which is binded to the grid however column header is different.

I wrote below code expecting that when `AcctNbr` is the header of column it will search the dataview(dv) based on the row filter and bind it the grid on UI but it's not working

Private Sub grd_FilterChanging(sender As Object, e As GridViewCollectionChangingEventArgs) Handles grd.FilterChanging
        dv.RowFilter =""
        If e.NewValue IsNot Nothing
        If DirectCast((DirectCast(e.NewItems, Object())(0)), Telerik.WinControls.Data.FilterDescriptor).[Operator] = Telerik.WinControls.Data.FilterOperator.IsEqualTo AndAlso DirectCast((DirectCast(e.NewItems, Object())(0)), Telerik.WinControls.Data.FilterDescriptor).PropertyName = "AcctNbr" Then
            Dim CurrentVal As String = CStr(e.NewValue)
            dv.RowFilter = "EnAcctNbr ='" & CurrentVal & "'"
        End If
        If DirectCast((DirectCast(e.NewItems, Object())(0)), Telerik.WinControls.Data.FilterDescriptor).[Operator] = Telerik.WinControls.Data.FilterOperator.IsNotEqualTo AndAlso DirectCast((DirectCast(e.NewItems, Object())(0)), Telerik.WinControls.Data.FilterDescriptor).PropertyName = "AcctNbr" Then
            Dim CurrentVal As String = CStr(e.NewValue)
            dv.RowFilter = "EnAcctNbr <>'" & CurrentVal & "'"
        End If
        End If

how can I achieve this behavior ? I tried to assign the updated dataview as datasource to the grid in `grd_CellEndEdit` event that too did not work. pls. help.

Regards,

Amit Rai

GridView

answered on 21 Dec 2023

1 answer

139 views

Right click but disable SelectionChanged

Dear Friends,
I am using telerik SelectionChanged event to select row value from grid, another thing I am opening context menu using ContextMenuOpening event, now the problem I am facing is that when I do right click I loss my current selected row.
I do not want to loss current selected row but same time I want to fire right click event using ContextMenuOpening , do we have any possible solutions for it so we will not loss our selected row when firing ContextMenuOpening of grid.

Thanks

GridView

answered on 21 Dec 2023

1 answer

140 views

example app winform login using sql server table with password encrypted?

Theres any sample app winform login using sql server table with password encrypted?

thank you

DataEntry

Form

answered on 20 Dec 2023

1 answer

72 views

RadSpellChecker: Problems with words more than 9 letters

Hi,

I use the RadSpellChecker for some Textbox Controls and it worked great.

But when I have words with more than 9 letters, I don't get the contextmenu die Add these Words to the dictonary.

Any Idead to solve this problem?

Attached a screenshot with the contextmenu on a word with max 9 letters and a screenshot with more than 9 letters.

Thank you

ContextMenu

TextBox

TextBoxControl

answered on 20 Dec 2023

2 answers

412 views

Setting the active MdiChild/DockWindow of a RadDock

I have a RadDock with several MdiChildren/DockWindows. When the user closes one of the tabs I want the focus to be set to the previously active tab.

In the ActiveWindowChanged event I remeber the previous active tab.

I've tried both the radDock.ActivateMdiChild(Form) and radDock.ActivateWindow(DockWindow) methods

What am I missing?

bool exists = (Array.IndexOf(radDock.MdiChildren, _currentMdi) != -1);

if (!exists && _prevMdi != null)

{

_currentMdi = null;

_currentDockWindow = null;

//radDock.ActivateMdiChild(_prevMdi);

radDock.ActivateWindow(_prevDockWindow);

}

_prevMdi = _currentMdi;

_currentMdi = (Form) ((HostWindow) e.DockWindow).Content;

_prevDockWindow = _currentDockWindow;
_currentDockWindow = e.DockWindow;

Dock

answered on 20 Dec 2023

2 answers

76 views

Limiting ResourcesPerView for grouped TimelineView

Hello,

I am using RadScheduler with a grouped TimelineView. The number of resources can be selected with a TrackBar, but if the selected value is to high, the view looks squezed and I got overlappings in my customized resource header elements. So my Idea is a minimum ResourceHeaderHeigth. I want to achieve this by calculating the maximum suitable ResourcesPerView value when the Trackbar is changed or the Form / Scheduler is resized. E.g. if my Scheduler has 250 px size, max 5 resources should be visible and if the size is resized to 200 px, only 4 should be shown, so that every resource has at least 50px height.

But to achieve this I need to get the size of the area, where the resources are paintet or SchedulerSize minus Header and Footer.

        private void tbVisibleResourceCount_ValueChanged(object sender, EventArgs e)
        {
            if (DesignMode)
                return;

            try
            {
                int val = (int) tbVisibleResourceCount.Value;

                if (val <= 0)
                {
                    tbVisibleResourceCount.Value = 1;
                }
                else
                {
                    var newValue = Math.Min(val, AppointmentsVm?.AktiveRessourcen?.Count ?? 0 /*rsTermine.Resources.Count*/);

                    /* todo
                    switch (rsTermine.SchedulerElement.ViewElement)
                    {
                        case SchedulerTimelineViewElement timelineElement:                           
                            break;
                    
                        case SchedulerDayViewElement dayViewElement:
                            break;

                        case SchedulerMonthViewElement monthViewElement:
                            break;

                        case TimelineGroupingByResourcesElement timelineGrouped:
                            IList<SchedulerTimelineViewElement> childTimelineElements = timelineGrouped.GetChildViewElements();
                            break;

                        case SchedulerDayViewGroupedByResourceElement dayViewGrouped:
                            break;

                        case SchedulerMonthViewGroupedByResourceElement monthViewGrouped:
                            break; 
                    }*/

                    rsTermine.ActiveView.ResourcesPerView = newValue;
                }

                SetAppointmentsMargin();
                _adjustBackgroundsTimer?.Reset();
            }
            catch (Exception ex)
            {
                LogHelper.HandleError<CalendarView>(this, $"Fehler in {nameof(tbVisibleResourceCount_ValueChanged)}", ex);
            }
        }

Hope you can help me with this problem.

Regards,

Stephan

Scheduler and Reminder

answered on 19 Dec 2023

1 answer

105 views

RadVirtualGrid when using Hierarchy not resizing child view when showing scrollbar

I'm trying RadVirtualGrid with Hierarchy but when columns are resized, and needs to show scrollbar, height of child table element is not updated.

Example

Is this a bug? Can I update it manualy?

Other issue I have noticed is: when child column header is wider than parent row, it is not longer resizable:

Example 2

This is the code used in this examples:

public partial class Form1 : Form
    {

        private int parentRows = 4;
        private int parentColumns = 4;

        private int childRows = 2;
        private int childColumns = 6;

        public Form1()
        {
            InitializeComponent();

            this.grid.CellValueNeeded += (s, e) =>
            {
                if (e.ViewInfo == this.grid.MasterViewInfo)
                {
                    if (e.ColumnIndex < 0) return;
                    else if (e.RowIndex == RadVirtualGrid.HeaderRowIndex)
                    {
                        e.Value = "HEADER_" + e.ColumnIndex;
                    }

                    else if (e.RowIndex < 0)
                    {
                        e.Value = "FIELD_" + e.ColumnIndex;
                    }

                    else if (e.RowIndex >= 0 && e.RowIndex < parentRows)
                    {
                        e.Value = "Value (" + e.RowIndex + ";" + e.ColumnIndex + ")";
                    }
                }
                else
                {

                    if (e.ColumnIndex < 0) return;
                    else if (e.RowIndex == RadVirtualGrid.HeaderRowIndex)
                    {
                        e.Value = "CHILD_HEADER_" + e.ColumnIndex;
                    }

                    else if (e.RowIndex < 0)
                    {
                        e.Value = "CHILD_FILED_ " + e.ColumnIndex;
                    }

                    else if (e.RowIndex >= 0 && e.RowIndex < childRows)
                    {
                        e.Value = "Child_Value (" + e.RowIndex + ";" + e.ColumnIndex + ")";
                    }

                }
            };

            this.grid.QueryHasChildRows += (s, e) =>
            {
                e.HasChildRows = e.ViewInfo == this.grid.MasterViewInfo && e.RowIndex >= 0 && e.RowIndex < parentRows;
            };

            this.grid.RowExpanding += (s, e) =>
            {
                e.ChildViewInfo.ColumnCount = childColumns;
                e.ChildViewInfo.RowCount = childRows;
            };


            this.grid.RowCount = parentRows;
            this.grid.ColumnCount = parentColumns;
        }
    }

VirtualGrid

answered on 19 Dec 2023