Questions on UI for WinForms Forum

4 answers

151 views

Customize editor of GridViewMultiComboBoxColumn throw cast exception

Hi Telerik Team

I customize to inherit GridViewMultiComboBoxColumn, BaseGridBehavior and RadMultiColumnComboBox. Example MeGridBehavior (inherited form BaseGridBehavior), MeGridViewMultiComboBoxColumn(inherited form GridViewMultiComboBoxColumn), MeMultiColumnComboBox (inherited form RadMultiColumnComboBox), MeMultiColumnComboBoxElement (inherit RadMultiColumnComboBoxElement)

when init GridView i set this.GridBehavior = new MeGridBehavior(), if column is Combobox editor i create MeGridViewMultiComboBoxColumn column and i override event OnEditorRequired and CreateMultiColunmnComboboxElement ;

//On MeMultiColumnCombobox

protected override RadMultiColumnComboBoxElement CreateMultiColumnComboBoxElement()

{

return new MeMultiColumnComboBoxElement(this.Name,this);

}

// on GridView

protected override void OnEditorRequired(object sender, EditorRequiredEventArgs e)

{

if (this.CurrentColumn is MeGridViewMultiComboBoxColumn)

{

var column = this.CurrentColumn as MeGridViewMultiComboBoxColumn;

MeMultiColumnComboBox cbx= CreateDataComboBox("Countries");

e.Editor = cbx.MeMultiColumnComboBoxElement;

}

protected override void OnCellValidating(object sender, CellValidatingEventArgs e)

{

//if value not in list of countries ?

var cbxCol = e.Column as MeGridViewMultiComboBoxColumn;

var detectError = ComboBoxValidating(text, e);

if (detectError)

{

e.Cancel = true;

base.OnCellValidating(sender,e);

ShowValidateError();

return;

}

When i click to another cell it throw exeption on mouseup event of MeGridBehavior

Unable to cast object of type 'MeMultiColumnComboBoxElement' to type 'Telerik.WinControls.UI.BaseGridEditor'.

at Telerik.WinControls.UI.GridViewEditManager.EndEditCore(Boolean validate, Boolean cancel)
at Telerik.WinControls.UI.GridViewEditManager.CloseEditor()
at Telerik.WinControls.UI.RadGridViewElement.CloseEditor()
at Telerik.WinControls.UI.GridRowBehavior.OnMouseUpLeft(MouseEventArgs e)
at Telerik.WinControls.UI.GridRowBehavior.OnMouseUp(MouseEventArgs e)
at Telerik.WinControls.UI.BaseGridBehavior.OnMouseUp(MouseEventArgs e)
at ......OnMouseUp(MouseEventArgs e) in d:\\MeProject\GridView\MeGridViewBehavior.cs

This error throw when I update to telerik rad control winforms version Q3 2013 but it work with version Q1 2013

Any one can help me !
Thanks .

GridView

answered on 18 Jan 2014

5 answers

1.4K+ views

How to get themes working?

Hi, I have this old winforms application that I am updating.
I want the RadGridView I have just added to it to use a different theme than default, but whatever I do, nothing happens..

I tried setting the ThemeName on the grid to "TelerikMetro", I also tried;

ThemeResolutionService.ApplicationThemeName = "TelerikMetro";

That sounded like the right thing to do after googling a bit - didn't work either from Program.cs or main.cs (the form with the grid)

I just don't get it.. how the heck do you get themes to work?

I've added references to Telerik.WinControls, t.w.gridview, t.w.themes.telerikmetro,t.w.ui, t.w.ui.design, t.windows.controls, t.w.c.data, t.w.c.datavisualization, t.w.c.gridview

This is driving me off the edge at the moment :(

// Regards, Morten

Themes and Visual Style Builder

answered on 17 Jan 2014

2 answers

1.3K+ views

Drag and drop files from the Desktop (or Windows Explorer) to RadListView

Hello guys, I hope you are doing great.

I'm working on a WinForms project. One of the requirements is to drag files from the Desktop (or Windows Explorer) and drop them on a RadListView component.

I set the AllowDrop and AllowDragDrop properties of the my listView object, and then I added the following events:

private void listView_DragEnter(object sender, DragEventArgs e)

{

MessageBox.Show("DragEnter");

}

private void listView_DragDrop(object sender, DragEventArgs e)

{

MessageBox.Show("DragDrop");

}

When I drag an item from the Desktop and enter the listView area, I get the "DragEnter" message. If I comment that code out, and then drop an item on the listView, I don't get the "DragDrop" message.

My first question is: is it possible to achieve what I'm trying to do? And if it is possible, my second question is: what am I doing wrong?

I created a small test project to isolate the situation. The following is the complete code of the form class:

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 DragFromDesktop

{

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

{

public DragFromDesktopForm()

{

InitializeComponent();

}

private void DragFromDesktopForm_Load(object sender, EventArgs e)

{

}

private void closeButton_Click(object sender, EventArgs e)

{

this.Close();

}

private void listView_DragEnter(object sender, DragEventArgs e)

{

//MessageBox.Show("DragEnter");

}

private void listView_DragDrop(object sender, DragEventArgs e)

{

MessageBox.Show("DragDrop");

}

I'm also attaching an example of how the form looks like. The big white square is the list view which I want to drop the items to.

Thanks in advance.

Best regards,

Alejandro

ListView

answered on 17 Jan 2014

0 answers

75 views

CompositeFilterExpression not filtering as expected

I have a grid which has to be filtered programatically based on user entry. More than one column has to be filtered and each column may have more than 1 value to be filtered upon. Like say, Col1, Col2, Col7, Col8 has to be filtered on {1,4}, {1,38}, {78,65} & {1,0} respectively.

I have written the below code for this but looks like it filters only on the last set of values i.e. 4,38,65,0.

public static void SetGridFilterComposite(RadGridView gridView, Dictionary<string, List<int>> filterValues)

{

CompositeFilterDescriptor mainDescriptor = new CompositeFilterDescriptor();

List<int> values = null;

if (filterValues == null || filterValues.Count == 0) return;

ClearGridFilterColumns(gridView);

foreach (string column in filterValues.Keys)

{

CompositeFilterDescriptor columnDescriptor = new CompositeFilterDescriptor();

if (gridView.Columns.Contains(column))

{

values = filterValues[column];

FilterDescriptor filterDescriptor = new FilterDescriptor();

foreach (int value in values)

{

filterDescriptor.PropertyName = column;

filterDescriptor.Operator = FilterOperator.IsEqualTo;

filterDescriptor.Value = value;

columnDescriptor.FilterDescriptors.Add(filterDescriptor);

}

columnDescriptor.LogicalOperator = FilterLogicalOperator.Or;

mainDescriptor.FilterDescriptors.Add(columnDescriptor);

}

mainDescriptor.LogicalOperator = FilterLogicalOperator.And;

mainDescriptor.IsFilterEditor = true;

gridView.FilterDescriptors.Add(mainDescriptor);

}

GridView

asked on 16 Jan 2014

0 answers

81 views

RadListview Find key

Posted 9 hours ago (permalink)

hello, well I tested the demo of your product working with the listview control by the database
radlistview1.DataSource = dt
dt.Columns radlistview1.DisplayMember = (1). ToString

and post pictures in the ItemDataBound event to perfect the problem there is that I require key press selects the first item that Start with good lyrics that I hope your help thanks.

I tried this and nothing

For i = 0 To ViewVideos.Items.Count - 1
             If ViewVideos.Items (i). Text = "sauce" Then
                 ViewVideos.SelectedIndex = i

                 MsgBox (i)
             else
             End If
         Next

regards

ListView

asked on 15 Jan 2014

8 answers

199 views

recurrence function

i am developing alarm system application using telerik 2012 q3 and i need your help in 2 questions :

1- how to convert database appointments rows to appointments object without using rad scheduler
2- how can i select rows from appointment table before 1 hours from starting time(recurring appointments)

Scheduler and Reminder

answered on 15 Jan 2014

2 answers

190 views

An easy way for a user to resize a control?

I am working on a Winform program, and I can't believe there isn't an easier way to accomplish what I'm trying.

Basically, I want to display an image that will always be 640x480. Then, I want to have another control on top of it that is nothing more than a selection area that the user can change its size & location inside that 640x480 area, and it will report back its pixel size & x/y location.

Short of drawing all of the lines by hand and adding grips by hand, I can't seem to find an easy way to do this. Am I overlooking something?

General Discussions

answered on 15 Jan 2014

17 answers

301 views

Deploying - doubt

Hi again... :-)

I have read the FAQ : Redistributing Telerik RadControls for WinForms

But have some doubts regarding it.

There are two approaches right ? One is to make a single EXE file by merging the assemblies and the EXE of the program. And the other is to merge the assemblies into a single assembly. Am I right ?

If I want to go for the second approach, from where should I get the ILMerge program ?

Thanks in advance..

PS: Special thanks to Richard Slade for the continuous help he had provided to me. Really appreciate it... :-)

General Discussions

answered on 15 Jan 2014

0 answers

187 views

Anyone have a transparent theme for buttons?

Hello,

I need to place buttons in the ribbon bar and I only want to show any image and text. I do not want the border or background although it may be nice to have some border show when the mouse is over the button and clicked. I have read about the visual style builder but this is too complicated for me. Has anyone done this and have a DLL for this already? I would even pay someone to do this for me if possible.

Thanks,

Warren

Themes and Visual Style Builder

asked on 15 Jan 2014

8 answers

80 views

ProgressBarElement Click event not work

hi sir/madam

I have a problem with using Progressbarelement in gridview; according your trainmen we can add progressbar to cells by cellformatting but when I create a click event for the Progressbarelement ; it's not fire; also I check MousDown and ...

But when use radbuttonelement there is no problem and fire well;

private void radGridView1_CellFormatting(object sender, CellFormattingEventArgs e)

{

.

RadProgressBarElement ProgressBarOne = new RadProgressBarElement();

ProgressBarOne.Click += new EventHandler(ProgressBarOne_Click);

.

}

void ProgressBarOne_Click(object sender, EventArgs e)

{

MessageBox.Show("somethings");

}

thank you for helping