Questions on UI for WinForms Forum

1 answer

209 views

GridViewComboBoxColumn contents not appearing on first time click only

I have a GridView with a GridViewComboBox column. I create a datasource in the Load handler of the form but do not assign it to the GridViewComboBox yet. The datasource is an IQueryable object and is located in the class accessible to all methods of the class.

private IQueryable<BUILDING> dataBuildings;

The GridViewComboBox datasource gets assigned in the CellEditorInitialized event handler of the gridView.

When the app runs and I click in the cell with the combobox, the contents of the dropdown are empty but the size of the dropdown is as if it were filled. If I click on another cell, same row or another row, and then click back into the combobox cell, the contents are filled as expected.

Why would this be?

GridView

answered on 23 Jan 2012

4 answers

326 views

How to removed dotted vertical line in CommandBar?

Hi!

How can I remove the dotted vertical line positioned on the left side of a CommandBar?

Thanks!

CommandBar

answered on 23 Jan 2012

15 answers

3.1K+ views

You can right click to click button

Hi Telerik

I face this case: we can you click a button by using right click of the mouse. How to disable it?
Thanks

Buttons, RadioButton, CheckBox, etc

answered on 21 Jan 2012

3 answers

541 views

Creating RAD MDI parent and child form

Hi Telerik Support Team:

How to create a Rad MDI form to the application ?
Because I see there is no option to add the MDI form from the add windows forms dialog.
I like to have a RadRibbonForm as my MDI parent form -- How to do this?
and how to add RadForm as MDI child form for the above RadRibbonForm (MDI parent form)

Expecting your valuable reply please.
Regards,
Thiru.

Form

answered on 21 Jan 2012

2 answers

512 views

Editable GridViewComboBoxColumn

I need to have a column in the grid where a user can either select a value from a list or type in a value. For example, if the user is enter a face amount for a life insurance policy the user can either select one of these three options: Minimum, Maximum, Target or enter a number from 100,000 to 10,000,000.

I tried using the GridViewComboBoxColumn and setting the DropDownStyle to DropDown. This allowed me to edit the value in the cell, but when I leave the cell, the cell's display value flips back to what it was previously.

In the example attached, click on the first row where it says 'Minimum' and type in 100000, then hit the tab key to move to a new cell. The cell flips from 100000 back to 'Minimum'.

Is there a way to use the GridViewComboBoxColumn to allow the user to either select a value from the drop down list or type in a value?

Here is the Form1.Designer.cs file:

namespace GridComboBoxColumn

{

partial class Form1

{

/// <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._grid = new Telerik.WinControls.UI.RadGridView();

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

this.SuspendLayout();

//

// _grid

//

this._grid.Location = new System.Drawing.Point(13, 13);

this._grid.Name = "_grid";

this._grid.Size = new System.Drawing.Size(259, 237);

this._grid.TabIndex = 0;

this._grid.Text = "radGridView1";

//

// Form1

//

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

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

this.ClientSize = new System.Drawing.Size(284, 262);

this.Controls.Add(this._grid);

this.Name = "Form1";

this.Text = "Form1";

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

this.ResumeLayout(false);

}

#endregion

private Telerik.WinControls.UI.RadGridView _grid;

}

Here is the sample Form1.cs file:

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using Telerik.WinControls.Primitives;

using Telerik.WinControls.UI;

namespace GridComboBoxColumn

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

SetupGrid();

}

private void SetupGrid()

{

// Add Column

{

GridViewComboBoxColumn column = new GridViewComboBoxColumn();

column.Name = "Policy.FaceAmount";

column.HeaderText = "Total Face Amount";

column.ValueMember = "Value";

column.DisplayMember = "Name";

column.DropDownStyle = Telerik.WinControls.RadDropDownStyle.DropDown;

column.ReadOnly = false;

BindingList<QuestionSelectionItem> list = new BindingList<QuestionSelectionItem>();

list.Add(new QuestionSelectionItem("Minimum", "MIN"));

list.Add(new QuestionSelectionItem("Maxmimum", "MAX"));

list.Add(new QuestionSelectionItem("Target", "TGT"));

column.DataSource = list;

_grid.Columns.Add(column);

}

// Add Row

{

// First Row

{

GridViewRowInfo row = _grid.Rows.AddNew();

row.Cells["Policy.FaceAmount"].Value = "MIN";

}

// Second Row

{

GridViewRowInfo row = _grid.Rows.AddNew();

row.Cells["Policy.FaceAmount"].Value = "100000";

}

// Third Row

{

GridViewRowInfo row = _grid.Rows.AddNew();

row.Cells["Policy.FaceAmount"].Value = "MAX";

}

protected class QuestionSelectionItem

{

private string _name = null;

private string _value = null;

public QuestionSelectionItem(string aName, string aValue)

{

_name = aName;

_value = aValue;

}

public string Name

{

get { return _name; }

set { _name = value; }

}

public string Value

{

get { return _value; }

set { _value = value; }

}

GridView

answered on 20 Jan 2012

4 answers

357 views

Add a DateTimePicker to a CommandBar

Hi,
I would like to add a DateTimePicker to a CommandBar. Is this Possible? How can it be done?
Thanks

CommandBar

answered on 20 Jan 2012

4 answers

196 views

Memory leak when repeatedly auto-hiding then docking ToolWindow in RadDock with data-binding

Hey Telerik,

I've discovered a memory leak issue when repeatedly auto-hiding then docking a ToolWindow in a RadDock.

I'm designing an application using the MVVM design pattern with a basic View and View-Model. The View is a form that contains a RadDock with a ToolWindow, and data-binding setup to the ToolWindow's property "DockState." The View-Model contains the bound property "ToolWindow1DockState" that uses INotifyPropertyChanged to update the ToolWindow's property "DockState". Below is my code, attached is my View's designer.

View

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using RadDockMemoryTest.ViewModel;

namespace RadDockMemoryTest.View

{

public partial class Form1 : Form

{

private MainViewModel viewModel;

/// <summary>

/// View Model object

/// </summary>

public MainViewModel ViewModel

{

get

{

if (viewModel == null)

{

ViewModel = new MainViewModel();

}

return viewModel;

}

set { viewModel = value; }

}

/// <summary>

/// Form default constructor

/// </summary>

public Form1()

{

InitializeComponent();

}

/// <summary>

/// Form load event handler

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void Form1_Load(object sender, EventArgs e)

{

setupControlBindings();

}

/// <summary>

/// Setup window's control bindings

/// </summary>

private void setupControlBindings()

{

radDock1.DockWindows["toolWindow1"].DataBindings.Add("DockState", ViewModel, "ToolWindow1DockState", true, DataSourceUpdateMode.Never);

}

ViewModel

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using Telerik.WinControls.UI.Docking;

namespace RadDockMemoryTest.ViewModel

{

public class MainViewModel : ViewModelBase

{

private DockState toolWindow1DockState;

/// <summary>

/// Controls toolWindow1's dock state

/// </summary>

public DockState ToolWindow1DockState

{

get { return toolWindow1DockState; }

set

{

toolWindow1DockState = value;

OnPropertyChanged("ToolWindow1DockState");

}

I setup a Window's automation tool to execute the following sequence:
1. Click "Auto-hide" on the docked ToolWindow.
2. Click the ToolWindow tab.
3. Click "Docked" to restore the ToolWindow to its docked state.

After letting the automation run overnight and observing memory processes in Windows Task Manager, I noticed the application's memory usage jumped from 32,000KB to 800,000KB.

How can I avoid the memory leak?

Thanks,
Eljay

General Discussions

answered on 20 Jan 2012

1 answer

100 views

Prevent grid movement on edit

Hi,
I have a aesthetical issue when editing the grid which can be seen in the Q3 SP1 demos under Columns, Grid Views. If you change the view to TableView and click in the Phone Column, the grid slightly "jumps" to the left. If you then click in the ID Column, the grid slightly "jumps" to the right. This is most noticeable if you look at the column headers.

Any ideas?

Thanks,
David A.

GridView

answered on 20 Jan 2012

4 answers

270 views

radlistview loop through customvisualitems

Hi is there a way to loop through listview customvisualitems and reach lightvisualelements in order to set visiblity for example
structure of my listview goes like that :
radlistview ---->customvisualitem---->stacklayoutpanel---->lightvisualelement1,lighvisualelement2
so my problem is that i need the right code in order to reach lightvisualelements and apply action on them.
if there any code that helps i appreciate help .
Best Regards, jack

ListView