Questions on UI for WinForms Forum

5 answers

1.0K+ views

Hello,

In the old ListControl i was using the item.Visibility Collapsed to hide some items while some conditions are not met, in the new version with the DropDownList i've noticed that the visibility property no longer applies to the item, it applies to the visual item, and it no longer works as before, and even more than this the IsVisible property of the item is readOnly, can someone please tell me how should i hide an item and not leave a blank space in the list ?

Thank you very much,

Best Regards,
Emanuel Varga

DropDownList

answered on 11 Dec 2010

8 answers

149 views

A Jacked Out Wizard Control

I don't like having to use a Tab Control or Panels to make a Wizard. It's a Pain

New Product Suggestions

answered on 11 Dec 2010

6 answers

251 views

Using RadMenu in an MDI Parent & Child with button menu items leaks memory

Hello,

I've got this memory leak, could you guys give an explanation/workaround? I've made the simplest test case (see below), factors for the bug to occur (that I already discovered):

- it's an MDI form situation with parent & child
- the child is maximized (the menu items are added into one menubar)
- the menu item provided by the client is a menu button
- a textbox is on the child form

TestMdiParent.cs

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using Telerik.WinControls.UI;

namespace MenuMemoryLeak

{

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

{

public TestMdiParent()

{

InitializeComponent();

}

//NOTE this stuff with the backgroundworker is just to repeatedly close/open the form, I know it's not fully correct but the bug occurs nevertheless

BackgroundWorker myWorker = new BackgroundWorker() { WorkerReportsProgress = true, WorkerSupportsCancellation = false };

TestMdiChild myMdiChild;

private void TestMdiParent_Shown(object sender, EventArgs e)

{

myWorker.DoWork += delegate

{

int count = 0;

while(true)

{

++count;

myWorker.ReportProgress(count);

System.Threading.Thread.Sleep(1000);

}

};

myWorker.ProgressChanged += delegate

{

if(myMdiChild != null)

{

myMdiChild.Close();

System.GC.Collect();

}

myMdiChild = new TestMdiChild() { MdiParent = this };

myMdiChild.Show();

};

myWorker.RunWorkerAsync();

}



TestMdiParent

.Designer.cs

namespace MenuMemoryLeak

{

partial class TestMdiParent

{

/// <summary>

/// Required designer variable.

/// </summary>

private System.ComponentModel.IContainer components = null;

/// <summary>

/// Clean up any resources being used.

/// </summary>

/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

protected override void Dispose(bool disposing)

{

if (disposing && (components != null))

{

components.Dispose();

}

base.Dispose(disposing);

}

#region Windows Form Designer generated code

/// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

private void InitializeComponent()

{

this.testMenuItem = new Telerik.WinControls.UI.RadMenuItem();

this.testParentMenu = new Telerik.WinControls.UI.RadMenu();

((System.ComponentModel.ISupportInitialize)(this)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.testParentMenu)).BeginInit();

this.SuspendLayout();

//

// testMenuItem

//

this.testMenuItem.Name = "testMenuItem";

this.testMenuItem.Text = "Parent";

//

// TestMdiParent

//

this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);

this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

this.ClientSize = new System.Drawing.Size(902, 523);

//

// testParentMenu

//

this.testParentMenu.Items.AddRange(new Telerik.WinControls.RadItem[] {

this.testMenuItem});

this.testParentMenu.Location = new System.Drawing.Point(0, 0);

this.testParentMenu.Name = "testParentMenu";

this.testParentMenu.Size = new System.Drawing.Size(902, 24);

this.testParentMenu.TabIndex = 1;

this.testParentMenu.Text = "radMenu1";

this.Controls.Add(this.testParentMenu);

this.IsMdiContainer = true;

this.Name = "TestMdiParent";

//

this.RootElement.ApplyShapeToControl = true;

this.Text = "TestMdiParent";

this.ThemeName = "ControlDefault";

this.Shown += new System.EventHandler(this.TestMdiParent_Shown);

((System.ComponentModel.ISupportInitialize)(this.testParentMenu)).EndInit();

((System.ComponentModel.ISupportInitialize)(this)).EndInit();

this.ResumeLayout(false);

this.PerformLayout();

}

#endregion

private Telerik.WinControls.UI.RadMenuItem testMenuItem;

private Telerik.WinControls.UI.RadMenu testParentMenu;

}

TestMdiChild.cs

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using Telerik.WinControls;

namespace MenuMemoryLeak

{

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

{

public TestMdiChild()

{

InitializeComponent();

//NOTE required for bug to occur

this.WindowState = FormWindowState.Maximized;

}

TestMdiChild.Designer.cs

namespace MenuMemoryLeak

{

partial class TestMdiChild

{

/// <summary>

/// Required designer variable.

/// </summary>

private System.ComponentModel.IContainer components = null;

/// <summary>

/// Clean up any resources being used.

/// </summary>

/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

protected override void Dispose(bool disposing)

{

if (disposing && (components != null))

{

components.Dispose();

}

base.Dispose(disposing);

}

#region Windows Form Designer generated code

/// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

private void InitializeComponent()

{

this.testMenuButtonItem = new Telerik.WinControls.UI.RadMenuButtonItem();

this.testChildMenu = new Telerik.WinControls.UI.RadMenu();

this.testTextBox = new Telerik.WinControls.UI.RadTextBox();

((System.ComponentModel.ISupportInitialize)(this.testChildMenu)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.testTextBox)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this)).BeginInit();

this.SuspendLayout();

//

// testMenuButtonItem

//

this.testMenuButtonItem.Name = "testMenuButtonItem";

this.testMenuButtonItem.Text = "Child";

//

// testChildMenu

//

this.testChildMenu.AllowMerge = false;

this.testChildMenu.IsMainMenu = false;

this.testChildMenu.Items.AddRange(new Telerik.WinControls.RadItem[] {

this.testMenuButtonItem});

this.testChildMenu.Location = new System.Drawing.Point(0, 0);

this.testChildMenu.Name = "testChildMenu";

this.testChildMenu.Size = new System.Drawing.Size(467, 24);

this.testChildMenu.TabIndex = 2;

this.testChildMenu.Text = "radMenu1";

//

// testTextBox

//

this.testTextBox.Location = new System.Drawing.Point(22, 23);

this.testTextBox.Name = "testTextBox";

this.testTextBox.Size = new System.Drawing.Size(100, 20);

this.testTextBox.TabIndex = 1;

this.testTextBox.TabStop = false;

this.testTextBox.Text = "test";

//

// TestMdiChild

//

this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);

this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

this.ClientSize = new System.Drawing.Size(467, 268);

this.Controls.Add(this.testChildMenu);

this.Controls.Add(this.testTextBox);

this.Name = "TestMdiChild";

//

this.RootElement.ApplyShapeToControl = true;

this.Text = "TestMdiChild";

this.ThemeName = "ControlDefault";

((System.ComponentModel.ISupportInitialize)(this.testChildMenu)).EndInit();

((System.ComponentModel.ISupportInitialize)(this.testTextBox)).EndInit();

((System.ComponentModel.ISupportInitialize)(this)).EndInit();

this.ResumeLayout(false);

this.PerformLayout();

}

#endregion

private Telerik.WinControls.UI.RadMenuButtonItem testMenuButtonItem;

private Telerik.WinControls.UI.RadMenu testChildMenu;

private Telerik.WinControls.UI.RadTextBox testTextBox;

}

If you call the parent MDI form and let it run a bit you should see the GDI objects increase by one each second and never get released.

If you know a solution/workaround, thanks a lot

Frederik

Menu

answered on 11 Dec 2010

3 answers

156 views

GridViewColumnGroup show/hide

Hi all,
i need a simple feature - to hide/show a ColumnGroup (including all columns and ColumnGroups within).
something exactly like hide column method (via the column chooser).
thanks,
Gal.

GridView

answered on 11 Dec 2010

4 answers

140 views

Navigator localization

Hi Telerik,

I am searching for an option to localize the schedule navigator, but haven't found any solution.

What is the best practise to localize the schedule navigator?

best regards

Ulrik

Scheduler and Reminder

answered on 11 Dec 2010

11 answers

559 views

RadGridView scrolls to end

My grid has grouping enabled. when i expand the group, and if the grid has a horizontal scrollbar, the grid automatically scrolls to the rightmost column.
Any clues as to why it could be doing this? Is there a property I can enable/disable to prevent this from happening.
Or workarounds?

Thanks
Anisha

GridView

answered on 11 Dec 2010

6 answers

190 views

radgridview export

Hello to all friends..I am making asp.net desktop application..
In that I have Telerik radgridview.

I want to export that grid in excel or in word..

Please help me as i have searched a lot but the solution i am not getting ..In telerik forums there is given export but only for silverlight grid
not for radgridview.

I am seraching for telerik radgridview export in desktop windows application..

General Discussions

answered on 11 Dec 2010

4 answers

110 views

Excel Like Filtering Crashes App When duplicate decimals exist

Hello,

We noticed the following problem with the RadGridView:

When you have Excel like filtering enabled, and you click on the filtering icon for a column that has duplicate decimal numbers, the app crashes with a message like this:

"Item has already been added. Key in dictionary: '26.7' Key being added: '26.7'"

Please find attached screenshots with grid of data and error message.

Configuration used:

Rad Controls for Win Forms 2010 Q3; WinXP, .NET 2.0, VB.NET

Here is the code that populates a test grid with data:

Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

Dim rand As Random = New Random()

Dim dt As DataTable = New DataTable()

dt.Columns.Add("Pecentage", GetType(Double))

dt.Columns.Add("Price", GetType(Double))

For i As Integer = 1 To 10000

dt.Rows.Add(rand.Next(0, 100) + rand.Next(0, 100) * 0.1, rand.Next(0, 1000000))

Next

grdData.DataSource = dt

grdData.BestFitColumns()

End Sub

Thanks.

GridView

answered on 11 Dec 2010

1 answer

218 views

Real Time Chart

Hi Team,

I m trying to develop the real time chart (Y value as Double, X as Time), The Chart will draw like running at some interval.
Please help me in that. Kindly provide some code also.

Thanks and Regards,
Saurabh Dubey

Chart (obsolete as of Q1 2013)

answered on 10 Dec 2010

9 answers

428 views

Embedding Webbrowser control in RadGridview

We are trying to implement a grid with HTML content being displayed in a column. Using Disablehtmlrendering=false does not work as we are having a lot of HTML markup that needs a control similar to the webbrowser control to display.

We are trying to use the CellFormatting Event to populate the cell with the web browser control but it seems like it only accepts RadElement controls. Are there any examples of embedding the Webbrowser control or Windows form controls or something similar in a Rad Gridview?

GridView

answered on 10 Dec 2010