Questions on UI for WinForms Forum

12 answers

316 views

2017 version is very slow when ticking a column header checkbox

We’re having a serious performance issues with RadGridView in Telerik v.2017.1.221.40 for Winforms. It is very easy to reproduce.
The code below opens up a Form with the only control, RadGridView and then adds 5,000 rows to it. The control has a single column containing Boolean values. Since the EnableHeaderCheckBox property of the column is set to true, it is possible to manually tick the check box in the column header.
With v.2017.1.221.40, after the checkbox ticked, it takes 10 seconds to the program to actually tick the boxes in all 5,000 rows and then 7 seconds to untick them. During this time the control (and the form too of course) remains unresponsive.

In another code example, which is virtually identical to the one below (it’s part of a large application), it takes more than 30 seconds to perform the operation.

However with v.2015.1.331.40, this operation is executed instantaneously.

Environment: i7-4770 CPU @ 3.40Gz, 24GB RAM, Windows 10 Pro, .Net 4.6.

public partial class Form1 : Form
{
private Telerik.WinControls.UI.RadGridView rgvSites;
private readonly BindingList<Site1> siteList = new BindingList<Site1>();

public Form1()
{
InitializeComponent();

for (int i = 1; i <= 5000; i++)
{
this.siteList.Add(new Site1() { Id = i, Number = i, Name = "site" + i });
}
this.rgvSites.DataSource = this.siteList;
}
private void InitializeComponent()
{
Telerik.WinControls.UI.GridViewCheckBoxColumn gridViewCheckBoxColumn1 = new Telerik.WinControls.UI.GridViewCheckBoxColumn();
Telerik.WinControls.UI.TableViewDefinition tableViewDefinition1 = new Telerik.WinControls.UI.TableViewDefinition();
this.rgvSites = new Telerik.WinControls.UI.RadGridView();
((System.ComponentModel.ISupportInitialize)(this.rgvSites)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.rgvSites.MasterTemplate)).BeginInit();
this.SuspendLayout();
//
// rgvSites
//
this.rgvSites.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.rgvSites.CausesValidation = false;
this.rgvSites.EnableAnalytics = false;
this.rgvSites.EnableGestures = false;
this.rgvSites.EnableHotTracking = false;
this.rgvSites.EnableTheming = false;
this.rgvSites.Location = new System.Drawing.Point(31, 31);
//
//
//
this.rgvSites.MasterTemplate.AllowAddNewRow = false;
this.rgvSites.MasterTemplate.AllowCellContextMenu = false;
this.rgvSites.MasterTemplate.AllowColumnChooser = false;
this.rgvSites.MasterTemplate.AllowColumnHeaderContextMenu = false;
this.rgvSites.MasterTemplate.AllowColumnReorder = false;
this.rgvSites.MasterTemplate.AllowColumnResize = false;
this.rgvSites.MasterTemplate.AllowDeleteRow = false;
this.rgvSites.MasterTemplate.AllowDragToGroup = false;
this.rgvSites.MasterTemplate.AllowRowResize = false;
this.rgvSites.MasterTemplate.AutoGenerateColumns = false;
gridViewCheckBoxColumn1.AllowFiltering = false;
gridViewCheckBoxColumn1.AllowGroup = false;
gridViewCheckBoxColumn1.AllowHide = false;
gridViewCheckBoxColumn1.AllowReorder = false;
gridViewCheckBoxColumn1.AllowResize = false;
gridViewCheckBoxColumn1.AllowSort = false;
gridViewCheckBoxColumn1.EnableHeaderCheckBox = true;
gridViewCheckBoxColumn1.FieldName = "Selected";
gridViewCheckBoxColumn1.HeaderText = "Selected";
gridViewCheckBoxColumn1.Name = "Selected";
gridViewCheckBoxColumn1.VisibleInColumnChooser = false;
gridViewCheckBoxColumn1.Width = 23;
this.rgvSites.MasterTemplate.Columns.AddRange(new Telerik.WinControls.UI.GridViewDataColumn[] {
gridViewCheckBoxColumn1});
this.rgvSites.MasterTemplate.EnableGrouping = false;
this.rgvSites.MasterTemplate.EnableSorting = false;
this.rgvSites.MasterTemplate.ShowRowHeaderColumn = false;
this.rgvSites.MasterTemplate.VerticalScrollState = Telerik.WinControls.UI.ScrollState.AlwaysShow;
this.rgvSites.MasterTemplate.ViewDefinition = tableViewDefinition1;
this.rgvSites.Name = "rgvSites";
this.rgvSites.ShowCellErrors = false;
this.rgvSites.ShowItemToolTips = false;
this.rgvSites.ShowRowErrors = false;
this.rgvSites.Size = new System.Drawing.Size(240, 218);
this.rgvSites.TabIndex = 0;
this.rgvSites.Text = "Sites";
//
// Form1
//
this.ClientSize = new System.Drawing.Size(284, 261);
this.Controls.Add(this.rgvSites);
this.Name = "Form1";
this.Text = "Form1";
((System.ComponentModel.ISupportInitialize)(this.rgvSites.MasterTemplate)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.rgvSites)).EndInit();
this.ResumeLayout(false);
}
}
class Site1
{
public long Id { get; set; }

/// <summary>
/// Site number.
/// </summary>
public long Number { get; set; }

/// <summary>
/// Site name.
/// </summary>
public string Name { get; set; }

public bool Selected
{
get;
set;
}
}

GridView

answered on 17 Nov 2017

29 answers

1.2K+ views

[Solved] Rad Grid CellDoubleClick event

I am trying to write some code for the cellDoubleClick event, but it seems that it only fires if the cells column is readonly. Is there a way around this? It looks like the first click will open the cell up for editing and the second click is ignored. I want to have different code run for a single click or a double click event.

GridView

answered on 17 Nov 2017

2 answers

178 views

Document window is resizable

I have RadForm-derived class that I'm adding as RadDock document windows. How do I make them stay the same size as the container? Please see attachment.

The code I'm using is something like this:

var view = new MyView(rule)

{

Dock = DockStyle.Fill,

TopLevel = false,

FormBorderStyle = FormBorderStyle.None,

MdiParent = this,

Text = "blah",

};

view.Show();

var wnd = new DocumentWindow {Text = "blah"};

wnd.Controls.Add(view);

radDock1.AddDocument(wnd);

I'm using an older version of Telerik at the moment. The version of RadDock.dll is 2017.3.912.40 and Runtime version is v4.0.30319.

Dock

answered on 17 Nov 2017

5 answers

262 views

Modification of MetroTheme

Hi,

I am currently using Rad Control for Winforms Q2 and Q3 2013.

I am developing a winform application and trying to use MetroTheme.

MetroTheme has a feel of light green in almost everywhere such as top border of winform border.

I'd like to change this color scheme slightly and create my own style theme. All the style elements should stay the same as MetroTheme except that this light green color should be replaced with my own color like light gray.

I tried to use Visual Style Builder and watched some video tutorials but couldn't find the solution.

Can you help me please?

Thanks,

Patrick

Themes and Visual Style Builder

answered on 16 Nov 2017

3 answers

218 views

RadStatusStrip's RadLabelElement & Backgroundworker Question.

I was under the assumption that any UI element you wanted to update from the Backgroundworker had to be in the ProgessChanged event. However, I have noticed, only by accident, that I have been able to update the RadLabelElement's Text property w/ in the BackGroundWorker DoWork event. Is this by design? I have not been able to find any documentation on this related to the RadLabelElement.

TIA

General Discussions

answered on 16 Nov 2017

11 answers

496 views

How to disable ToolWindow floating after double click header

Hi,

If I double click the header of Toolwindow, it will become floating. May this function be closed? Thanks.

Dock

answered on 15 Nov 2017

8 answers

207 views

Excel like filtering - hide filtering symbol in column header

Hello,

is it possible to hide the filter symbol in a specific column header while excel-like filtering remains enabled?

I have to filter a specific column via some radio buttons only.

This works for me:

Private Sub rbAktiv_CheckedChanged(sender As Object, e As EventArgs) Handles rbAktivAuftraege.CheckedChanged

Dim filter As New FilterDescriptor()

Dim filtervalue As String = String.Empty

filter.PropertyName = "oa_status"

filter.[Operator] = FilterOperator.Contains

filter.IsFilterEditor = True

Select Case True

Case sender Is rbAktivAuftraege

Me.RGV_auftraege.FilterDescriptors.Clear()

filtervalue = CStr("aktiv")

filter.Value = filtervalue

Me.RGV_auftraege.FilterDescriptors.Add(filter)

End Select

Best Regards,

V. Adler

GridView

answered on 14 Nov 2017

4 answers

152 views

Determine active summary row

I want to apply formatting to a cell in a summary row (or the entire row in some cases) but I have several summary rows in my grid. How can I tell in the viewrowformatting or other event which summary row is active?

GridView

answered on 14 Nov 2017

4 answers

237 views

Macros and Dropdown

Hi,

I use a spreadsheet to display a xlsm file which contains buttons and data validation from a list.

The attached file "Excel" shows how this file looks in Excel.

The attached file "SpreadSheet" shows how this file looks in the spreadsheet :

- buttons are not displayed

- the data validation in the cell works correctly according to the list but drop down arrow is not shown in the cell even if the options "In-cell dropdown" is checked

Thanks for your help

Regards

Spreadsheet