Questions on UI for WinForms Forum

1 answer

305 views

Programatically setting the value of a GridViewComboBoxColumn

Hi,

I have a GridView that is unbound. I manually add the rows and the columns, one of which is a GridViewComboBoxColumn (other columns omitted):

var departmentColumn = new GridViewComboBoxColumn();

departmentColumn.HeaderText = "Department";

departmentColumn.Name = "departmentColumn";

departmentColumn.Width = 120;

departmentColumn.DisplayMember = "Name";

departmentColumn.ValueMember = "Id";

departmentColumn.DataSource = _departments;

grid.MasterTemplate.Columns.AddRange(new GridViewDataColumn[]

{

departmentColumn

});

_departments is a list containing a number of Department objects, which have among other things a Name property and an Id property.

I manually add the rows to the grid like this (still, other columns omitted):

var row = grid.Rows.AddNew();

row.Cells[0].Value = "Department A";

I would like this to result in a new row in the grid, where "Department A" is selected in the list of values in the GridViewComboBoxColumn. However, this doesn't work. Trying to set the name results in a FormatException ("Input string was not in a correct format.")

I feel silly for having to ask because it must be dead simple, but I am stuck!

Best regards

GridView

answered on 25 Jan 2012

1 answer

183 views

DataGridView Locks if BindingSource EndEdit causes Exception

Hi,

I have a RadForm(Child) with a BindingSource a DataSet and a DataGridView

the DataSet is populated from SQL and is then set as the BindingSource DataSource
the DataGridView DataSource is then set to the BindingSource

I also have a RadRibbonForm(Main)

This has a RadRibbon, a RadDock. The IsMdiContainer is set to true and the RadDock is set to automaticly detect Mdi Children
There is a button on the RadRibbonBar that will call endedit on the child form to save the data.

This is now where I'm hitting a problem. If i call the endedit from a button on the Child form then any error is caught by the DataGridView and everything works as expected. If I call the EndEdit from the button on the RadRibbonBar then the EndEdit causes a Exception the error is still caught by the DataGridView but then the DataGridView is frozen/Locked and i cannot change any Values until I remove the afending line and click the button again.

A Example Project can be Downloaded From ExampleProject.zip

Any Help would be Nice :D

Thanks

David

RibbonBar

answered on 25 Jan 2012

4 answers

334 views

DocumentCloseButton Event?

I'm using the Q3 2009 Telerik controls (2009.3.9.1203) and have a scenario where I populate a RadDock initially and allow the user to add/remove additional DocumentWindows. When the user closes a DocumentWindow through the 'X' next to each tab (the button added to the title by setting ShowDocumentCloseButton to true), I'd like a prompt to come up to warn the user that they'd lose their data. However, the application at points removes and adds DocumentWindows to the same RadDock, and I don't want the prompt to appear in those scenarios.

Right now I am hooked into the DockWindowClosing event. Through debugging I haven't found any information in the sender or event args that specify where the event was called from. In this case, when the program has to programmatically remove forms the user gets the prompt I created. I figure the best way to go about this is to ditch using the DockWindowClosing event, and try to hook into the Click event of that DocumentCloseButton.

Is this at all possible? Is there another way to achieve what I'd like to do?

Dock

answered on 24 Jan 2012

4 answers

299 views

Disable keytips or catch the alt key

Hello again,

actually it is neccessary for us to perform another action if the alt-key is pressed. For example Alt+F1 performs an action and so on. But if we are pressing the alt-key, only the keytips of the ribbon are showing up and no other command is executed. But we need the keytips too, so is it possible to show the keytips only then if absolutely no other key is pressed (may on the keyup event and not at the keydown)?

Greetings

RibbonBar

answered on 24 Jan 2012

1 answer

98 views

Export Hierarchy to Excel and Maintain Widths

I need the widths set by the user to be maintained when I export to Excel (using ExportToExcelML). It works for non-hierarchical, but when I set ExportHierarchy to true, it no longer works. I understand that the child widths might conflict with the parent widths and it's not feasible to maintain both, but how can I at least maintain the parent widths?

GridView

answered on 24 Jan 2012

11 answers

154 views

GridView top Border missing in 2011 q2

Hi
I`ve downloaded 2011 q2
GridView not showing the top border,
I`ve set the Theme to ControlDefault and other Themes, but it`s not working.
tried to change border thikness and again not working
I`m sure I didn`t have this problem in 2011 q1.

if(It`s a bug in this release)
{
please fix it();
}
else
{
what`s the solution();
}

GridView

answered on 24 Jan 2012

5 answers

220 views

Non databinding performance

Hi,

I was wondering if the list view will improve its non-binding performance.

Our application uses the .NET list view and I'm seeing how well we can move to the telerik controls. So far the performance is terrible. When I moved our tree view to telerik, the performance was great, so this was a bit disappointing.

In my example below, the time for button1 to complete loading the telerik list view takes 18678ms, whereas the traditional Microsoft list view in button2 is 46ms.

When I add in some threading, the telerik list view needs about 65ms to draw before the form remains interactive, and takes 17765ms to add the list items. whereas the Microsoft list view needs 1ms per item and takes 136ms in total.

Will Telerik be improving this or should I find another way? I can't remember why I didn't try data binding, but I'll spend the afternoon reinvestigating it.

Imports Telerik.WinControls.UI

Public Class Form3

Inherits System.Windows.Forms.Form

'Form overrides dispose to clean up the component list.

<System.Diagnostics.DebuggerNonUserCode()> _

Protected Overrides Sub Dispose(ByVal disposing As Boolean)

Try

If disposing AndAlso components IsNot Nothing Then

components.Dispose()

End If

Finally

MyBase.Dispose(disposing)

End Try

End Sub

'Required by the Windows Form Designer

Private components As System.ComponentModel.IContainer

'NOTE: The following procedure is required by the Windows Form Designer

'It can be modified using the Windows Form Designer.

'Do not modify it using the code editor.

<System.Diagnostics.DebuggerStepThrough()> _

Private Sub InitializeComponent()

Dim ListViewDetailColumn1 As Telerik.WinControls.UI.ListViewDetailColumn = New Telerik.WinControls.UI.ListViewDetailColumn("Column 0", "Column 0")

Dim ListViewDetailColumn2 As Telerik.WinControls.UI.ListViewDetailColumn = New Telerik.WinControls.UI.ListViewDetailColumn("Column 1", "Column 1")

Dim ListViewDetailColumn3 As Telerik.WinControls.UI.ListViewDetailColumn = New Telerik.WinControls.UI.ListViewDetailColumn("Column 2", "Column 2")

Dim ListViewDetailColumn4 As Telerik.WinControls.UI.ListViewDetailColumn = New Telerik.WinControls.UI.ListViewDetailColumn("Column 3", "Column 3")

Dim ListViewDetailColumn5 As Telerik.WinControls.UI.ListViewDetailColumn = New Telerik.WinControls.UI.ListViewDetailColumn("Column 4", "Column 4")

Dim ListViewDetailColumn6 As Telerik.WinControls.UI.ListViewDetailColumn = New Telerik.WinControls.UI.ListViewDetailColumn("Column 5", "Column 5")

Dim ListViewDetailColumn7 As Telerik.WinControls.UI.ListViewDetailColumn = New Telerik.WinControls.UI.ListViewDetailColumn("Column 6", "Column 6")

Dim ListViewDetailColumn8 As Telerik.WinControls.UI.ListViewDetailColumn = New Telerik.WinControls.UI.ListViewDetailColumn("Column 7", "Column 7")

Dim ListViewDetailColumn9 As Telerik.WinControls.UI.ListViewDetailColumn = New Telerik.WinControls.UI.ListViewDetailColumn("Column 8", "Column 8")

Dim ListViewDetailColumn10 As Telerik.WinControls.UI.ListViewDetailColumn = New Telerik.WinControls.UI.ListViewDetailColumn("Column 9", "Column 9")

Me.ListView1 = New Telerik.WinControls.UI.RadListView()

Me.ListView2 = New System.Windows.Forms.ListView()

Me.RadButton1 = New Telerik.WinControls.UI.RadButton()

Me.RadButton2 = New Telerik.WinControls.UI.RadButton()

Me.ColumnHeader1 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)

Me.ColumnHeader2 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)

Me.ColumnHeader3 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)

Me.ColumnHeader4 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)

Me.ColumnHeader5 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)

Me.ColumnHeader6 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)

Me.ColumnHeader7 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)

Me.ColumnHeader8 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)

Me.ColumnHeader9 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)

Me.ColumnHeader10 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)

Me.RadButton3 = New Telerik.WinControls.UI.RadButton()

Me.RadButton4 = New Telerik.WinControls.UI.RadButton()

Me.RadTextBox1 = New Telerik.WinControls.UI.RadTextBox()

Me.RadTextBox2 = New Telerik.WinControls.UI.RadTextBox()

CType(Me.ListView1, System.ComponentModel.ISupportInitialize).BeginInit()

CType(Me.RadButton1, System.ComponentModel.ISupportInitialize).BeginInit()

CType(Me.RadButton2, System.ComponentModel.ISupportInitialize).BeginInit()

CType(Me.RadButton3, System.ComponentModel.ISupportInitialize).BeginInit()

CType(Me.RadButton4, System.ComponentModel.ISupportInitialize).BeginInit()

CType(Me.RadTextBox1, System.ComponentModel.ISupportInitialize).BeginInit()

CType(Me.RadTextBox2, System.ComponentModel.ISupportInitialize).BeginInit()

Me.SuspendLayout()

'

'ListView1

'

Me.ListView1.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _

Or System.Windows.Forms.AnchorStyles.Left) _

Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)

ListViewDetailColumn1.HeaderText = "Column 0"

ListViewDetailColumn2.HeaderText = "Column 1"

ListViewDetailColumn3.HeaderText = "Column 2"

ListViewDetailColumn4.HeaderText = "Column 3"

ListViewDetailColumn5.HeaderText = "Column 4"

ListViewDetailColumn6.HeaderText = "Column 5"

ListViewDetailColumn7.HeaderText = "Column 6"

ListViewDetailColumn8.HeaderText = "Column 7"

ListViewDetailColumn9.HeaderText = "Column 8"

ListViewDetailColumn10.HeaderText = "Column 9"

Me.ListView1.Columns.AddRange(New

Telerik.WinControls.UI.ListViewDetailColumn() {ListViewDetailColumn1, ListViewDetailColumn2, ListViewDetailColumn3, ListViewDetailColumn4, ListViewDetailColumn5, ListViewDetailColumn6, ListViewDetailColumn7, ListViewDetailColumn8, ListViewDetailColumn9, ListViewDetailColumn10})

Me.ListView1.GroupItemSize = New System.Drawing.Size(200, 20)

Me.ListView1.ItemSize = New System.Drawing.Size(200, 20)

Me.ListView1.ItemSpacing = -1

Me.ListView1.Location = New System.Drawing.Point(49, 67)

Me.ListView1.Name = "ListView1"

Me.ListView1.Size = New System.Drawing.Size(782, 629)

Me.ListView1.TabIndex = 1

Me.ListView1.ViewType = Telerik.WinControls.UI.ListViewType.DetailsView

'

'ListView2

'

Me.ListView2.Columns.AddRange(New System.Windows.Forms.ColumnHeader() {Me.ColumnHeader1, Me.ColumnHeader2, Me.ColumnHeader3, Me.ColumnHeader4, Me.ColumnHeader5, Me.ColumnHeader6, Me.ColumnHeader7, Me.ColumnHeader8, Me.ColumnHeader9, Me.ColumnHeader10})

Me.ListView2.Location = New System.Drawing.Point(49, 67)

Me.ListView2.Name = "ListView2"

Me.ListView2.Size = New System.Drawing.Size(782, 629)

Me.ListView2.TabIndex = 2

Me.ListView2.UseCompatibleStateImageBehavior = False

Me.ListView2.View = System.Windows.Forms.View.Details

'

'RadButton1

'

Me.RadButton1.Location = New System.Drawing.Point(49, 37)

Me.RadButton1.Name = "RadButton1"

Me.RadButton1.Size = New System.Drawing.Size(130, 24)

Me.RadButton1.TabIndex = 3

Me.RadButton1.Text = "RadButton1"

'

'RadButton2

'

Me.RadButton2.Location = New System.Drawing.Point(185, 37)

Me.RadButton2.Name = "RadButton2"

Me.RadButton2.Size = New System.Drawing.Size(130, 24)

Me.RadButton2.TabIndex = 3

Me.RadButton2.Text = "RadButton2"

'

'RadButton3

'

Me.RadButton3.Location = New System.Drawing.Point(353, 12)

Me.RadButton3.Name = "RadButton3"

Me.RadButton3.Size = New System.Drawing.Size(130, 24)

Me.RadButton3.TabIndex = 4

Me.RadButton3.Text = "RadButton3"

'

'RadButton4

'

Me.RadButton4.Location = New System.Drawing.Point(489, 12)

Me.RadButton4.Name = "RadButton4"

Me.RadButton4.Size = New System.Drawing.Size(130, 24)

Me.RadButton4.TabIndex = 4

Me.RadButton4.Text = "RadButton4"

'

'RadTextBox1

'

Me.RadTextBox1.Location = New System.Drawing.Point(353, 37)

Me.RadTextBox1.Name = "RadTextBox1"

Me.RadTextBox1.Size = New System.Drawing.Size(100, 20)

Me.RadTextBox1.TabIndex = 5

Me.RadTextBox1.TabStop = False

Me.RadTextBox1.Text = "65"

'

'RadTextBox2

'

Me.RadTextBox2.Location = New System.Drawing.Point(489, 37)

Me.RadTextBox2.Name = "RadTextBox2"

Me.RadTextBox2.Size = New System.Drawing.Size(100, 20)

Me.RadTextBox2.TabIndex = 5

Me.RadTextBox2.TabStop = False

Me.RadTextBox2.Text = "1"

'

'Form3

'

Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)

Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font

Me.ClientSize = New System.Drawing.Size(880, 724)

Me.Controls.Add(Me.RadTextBox2)

Me.Controls.Add(Me.RadTextBox1)

Me.Controls.Add(Me.RadButton4)

Me.Controls.Add(Me.RadButton3)

Me.Controls.Add(Me.RadButton2)

Me.Controls.Add(Me.RadButton1)

Me.Controls.Add(Me.ListView2)

Me.Controls.Add(Me.ListView1)

Me.Name = "Form3"

Me.Text = "Form3"

CType(Me.ListView1, System.ComponentModel.ISupportInitialize).EndInit()

CType(Me.RadButton1, System.ComponentModel.ISupportInitialize).EndInit()

CType(Me.RadButton2, System.ComponentModel.ISupportInitialize).EndInit()

CType(Me.RadButton3, System.ComponentModel.ISupportInitialize).EndInit()

CType(Me.RadButton4, System.ComponentModel.ISupportInitialize).EndInit()

CType(Me.RadTextBox1, System.ComponentModel.ISupportInitialize).EndInit()

CType(Me.RadTextBox2, System.ComponentModel.ISupportInitialize).EndInit()

Me.ResumeLayout(False)

Me.PerformLayout()

End Sub

Private WithEvents ListView1 As Telerik.WinControls.UI.RadListView

Friend WithEvents ListView2 As System.Windows.Forms.ListView

Friend WithEvents RadButton1 As Telerik.WinControls.UI.RadButton

Friend WithEvents RadButton2 As Telerik.WinControls.UI.RadButton

Friend WithEvents ColumnHeader1 As System.Windows.Forms.ColumnHeader

Friend WithEvents ColumnHeader2 As System.Windows.Forms.ColumnHeader

Friend WithEvents ColumnHeader3 As System.Windows.Forms.ColumnHeader

Friend WithEvents ColumnHeader4 As System.Windows.Forms.ColumnHeader

Friend WithEvents ColumnHeader5 As System.Windows.Forms.ColumnHeader

Friend WithEvents ColumnHeader6 As System.Windows.Forms.ColumnHeader

Friend WithEvents ColumnHeader7 As System.Windows.Forms.ColumnHeader

Friend WithEvents ColumnHeader8 As System.Windows.Forms.ColumnHeader

Friend WithEvents ColumnHeader9 As System.Windows.Forms.ColumnHeader

Friend WithEvents ColumnHeader10 As System.Windows.Forms.ColumnHeader

Friend WithEvents RadButton3 As Telerik.WinControls.UI.RadButton

Friend WithEvents RadButton4 As Telerik.WinControls.UI.RadButton

Friend WithEvents RadTextBox1 As Telerik.WinControls.UI.RadTextBox

Friend WithEvents RadTextBox2 As Telerik.WinControls.UI.RadTextBox

Dim list As New List(Of String())

Private Sub Form3_Load(sender As Object, e As System.EventArgs) Handles Me.Load

For i = 0 To 300

list.Add({"one " + i.ToString,

"two " + i.ToString,

"three " + i.ToString,

"four " + i.ToString,

"five " + i.ToString,

"six " + i.ToString,

"seven " + i.ToString,

"eight " + i.ToString,

"nine " + i.ToString,

"ten " + i.ToString})

Next

End Sub

Private Sub RadButton1_Click(sender As System.Object, e As System.EventArgs) Handles RadButton1.Click

ListView1.BringToFront()

ListView1.Items.Clear()

time = New Stopwatch()

For Each i In list

Dim li As New ListViewDataItem(i(0), i.ToArray())

time.Start()

ListView1.Items.Add(li)

time.Stop()

Next

msg()

End Sub

Private Sub RadButton2_Click(sender As System.Object, e As System.EventArgs) Handles RadButton2.Click

ListView2.BringToFront()

ListView2.Items.Clear()

time = New Stopwatch()

For Each i In list

Dim li As New ListViewItem(i(0))

li.SubItems.AddRange(i.Skip(1).ToArray())

time.Start()

ListView2.Items.Add(li)

time.Stop()

Next

msg()

End Sub

Dim time As Stopwatch

Private Sub RadButton3_Click(sender As System.Object, e As System.EventArgs) Handles RadButton3.Click

ListView1.BringToFront()

ListView1.Items.Clear()

Dim wait = CInt(RadTextBox1.Text)

time = New Stopwatch()

Threading.Tasks.Task.Factory.StartNew(

Sub()

Dim last = list.Last()

For Each i In list

Dim ii = i

Dim li As New ListViewDataItem(i(0), i.ToArray())

Threading.Thread.Sleep(wait)

Me.BeginInvoke(

Sub()

time.Start()

ListView1.Items.Add(li)

time.Stop()

If ii Is last Then msg()

End Sub)

Next

End Sub)

End Sub

Sub msg()

MsgBox("Total is " + time.ElapsedMilliseconds.ToString)

End Sub

Private Sub RadButton4_Click(sender As System.Object, e As System.EventArgs) Handles RadButton4.Click

ListView2.BringToFront()

ListView2.Items.Clear()

time = New Stopwatch()

Dim wait = CInt(RadTextBox2.Text)

Threading.Tasks.Task.Factory.StartNew(

Sub()

Dim last = list.Last()

For Each i In list

Dim ii = i

Dim li As New ListViewItem(i(0))

li.SubItems.AddRange(i.Skip(1).ToArray())

Threading.Thread.Sleep(wait)

Me.BeginInvoke(

Sub()

time.Start()

ListView2.Items.Add(li)

time.Stop()

If ii Is last Then msg()

End Sub)

Next

End Sub)

End Sub

End Class

My experience with .Net is 7 years. My experience with Rad is about 2 weeks.

OS version and applied service packs

Microsoft Windows Server 2003, Standard Edition, Service Pack 2

Regional and language settings, if different from En-US

English (Australia)

.NET version (.NET2, .NET3, .NET3.5)

.NET 4.0.30319 SP1Rel, Visual Studio 2010 Version 10.0.40219.1 SP1Rel

Exact version of the Telerik product

Runtime Version v2.0.50727, Version 2011.2.11.831

ListView

answered on 24 Jan 2012

2 answers

180 views

No borders when exporting to PDF

I have a RadRichTextBox control, it loads content from DOCX file and then it can be modiified, but when to export to PDF, the file is created correctly, the tables have the correct sizes, but can't draw the border, I tried to make the line width bigger, using some colors, but nothing works, even if I load the first content via HTML.

RichTextBox (obsolete as of Q3 2014 SP1)

answered on 24 Jan 2012

3 answers

317 views

Fixed stack panel header

Is it possible to fix the stack panel header? By default, the header text reflects the selected page's text.

I've attached the header outlined in red. Thanks.

PageView

answered on 23 Jan 2012

1 answer

199 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