Questions on UI for WinForms Forum

8 answers

196 views

How can I ensure that a Form that has been docked to an MDIForm doesn't get docked a 2nd time? That is, I need a Form to only be visible once. I tried making it a singleton class, but calling the DockControl of the RadDock still added a same form , though one was an empty shell.

Dock

answered on 27 Jun 2011

2 answers

103 views

Data disappears from unbound grid(first time only) when creating on-demand hierarchical grid/child

Hi,
I have an unbound radgridview and i am trying to add some on-demand (unbound) hierarchical child/grid to it. It seems i have to "load data in the grid" twice to see data. The first time around, i get to see the columns in the master grid but no data. When i "load data in grid" again, i then get the data.

It seems that when the Master Gird is bound and then i create the on-demand child grid, i can see the data. I must be missing some step in the unbound mode and cannot figure out what. Please could you help?

My code (VS2008) is shown below. The issue is i have to click the Button1 twice to get data .
Thanks
Don

Imports Telerik.WinControls.UI

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

'clear all data (since we have to click twice to see the data)

gridReview.Columns.Clear()

gridReview.Rows.Clear()

'set up columns

gridReview.Columns.Add(New GridViewTextBoxColumn("ID"))

gridReview.Columns.Add(New GridViewTextBoxColumn("Employee"))

gridReview.Columns.Add(New GridViewTextBoxColumn("Code"))

gridReview.Columns.Add(New GridViewTextBoxColumn("Total Hours"))

gridReview.Columns.Add(New GridViewCheckBoxColumn("Review"))

'setup some grid proerties

gridReview.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill

gridReview.AllowAddNewRow = False

gridReview.AllowDeleteRow = False

gridReview.ShowGroupPanel = False

gridReview.Columns(0).ReadOnly = True

gridReview.Columns(1).ReadOnly = True

gridReview.Columns(2).ReadOnly = True

'load sample data

gridReview.Rows.Add(1111, "John Smith", 423, 40.2, False)

gridReview.Rows.Add(2222, "Jane Doe", 421, 10.2, False)

gridReview.Rows.Add(3333, "Larry Smith", 423, 23.5, False)

gridReview.Rows.Add(4444, "Lori Smith", 425, 26.1, False)

'create the hierarchical grid

Dim template As New GridViewTemplate()

'setup hierarchical grid columns

Dim id As New GridViewTextBoxColumn("ID")

Dim shiftdate As New GridViewTextBoxColumn("DisplayDate")

Dim in1 As New GridViewTextBoxColumn("In1")

Dim out1 As New GridViewTextBoxColumn("Out1")

Dim hours As New GridViewTextBoxColumn("Hours")

'setup some hierarchical grid properties

template.Columns.AddRange(id, shiftdate, in1, out1, hours)

template.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill

template.AllowAddNewRow = False

template.AllowDeleteRow = False

template.AllowEditRow = False

gridReview.Templates.Add(template)

template.HierarchyDataProvider = New GridViewEventDataProvider(template)

'not specified relation as its on-demand.

'code will be put in gridReview_RowSourceNeeded

End Sub

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

AddHandler gridReview.RowSourceNeeded, AddressOf gridReview_RowSourceNeeded

End Sub

Private Sub gridReview_RowSourceNeeded(ByVal sender As Object, ByVal e As GridViewRowSourceNeededEventArgs)

MessageBox.Show("Show some data")

End Sub

End Class

GridView

answered on 27 Jun 2011

1 answer

182 views

Number of child elements in GridExpanderItem

Hey at Telerik

I subscibe to the event below and would like to show in the GridExpanderItem next to the plussign/minussign the number of child elements that exists in child GridViewTemplate.

All i can do is change the SignStyle, but there is no option for adding text.
I have tried to change the Text property, the size property and setting DrawTet to true, but with no luck.

Is there any way to add the text for instance "17" next to the plussign in GridExpanderItem ?

Perhaps it should be a setting that the number of child elements is shown near the expander.

I hope you can help me it's very important that the number is shown here to help people save time from expanding the element.

The tooltip just doesn't get the job done.

Sincerly Jan

private

void rgvEjendomme_ViewCellFormatting(object sender, CellFormattingEventArgs e)

{

GridGroupExpanderCellElement cell = e.CellElement as GridGroupExpanderCellElement;

if (cell != null && e.CellElement.RowElement is GridDataRowElement)

{

cell.Expander.Visibility = Telerik.WinControls.ElementVisibility.Visible;

cell.Expander.ToolTipText = "Matrikler: " + ((Ejendom)e.Row.DataBoundItem).Matrikler.Count.ToString();

}

if (e.CellElement is GridDetailViewCellElement && e.CellElement.Children.Count != 0)

{

var pageView = e.CellElement.Children[0] as RadPageViewStripElement;

if (pageView == null)

{

return;

}

GridView

answered on 27 Jun 2011

2 answers

248 views

SaveXML and LoadXML only works partially

Hi,

I'm using Winform Q1 2011 SP1 and VS2008.
While trying RadTreeView.SaveXML(@"TreeView.xml") , I noticed that information such as forecolor, strikeout fontstyle ...for each individual node is not saved in the XML document.
When using RadTreeView.LoadXML(@"TreeView.xml")), and while information such as CheckState="On" is in the XML document next to some nodes, the RadTreeView is loaded without any of the node's checkboxes being 'checked (they're all left unchecked).
Also and if I add manually Forecolor="Green" in the TreeView.xml document next to some nodes, the LoadXML method will assign correctly the color green to some nodes.

As I plan to let the user decide of the data to be added in the RadTreeView, it sounded like a promising feature, so is there anyway to correct the above (get checkboxes checked or unchecked, forecolor...)?
SaveXML allows for some extra types to be saved. What are they? Any documentation on this?

The help file mentions also that 'For direct access to the tree view XML as text use the TreeViewXML property.'. How is this implemented concretely?

Best regards,
Alain Cavenaile

Treeview

answered on 25 Jun 2011

1 answer

142 views

Adding row directly from Gridview

Hi,
I have a gridview populated from a List<> and i want to be able to modify, delete or to add a new row (by clicking on "Add new row " at the bottom of the grid) directly on grid . After the user fills out all columns, he will click on a save button outside the grid. Now, i want to know how to iterate between gridview rows to know wich rows were added an wich were modified, deleted....
And depeding on the row state, i'll do an insert, update or delete on the Database.

Thank u very much!

GridView

answered on 24 Jun 2011

4 answers

145 views

Unable to get hierarchy (+/-) indicators to disappear with empty rows.

Hello I have created this simple bit of code that displays a hierarchial orders grid (see screen1.jpg)

Now I want to hide the +/- buttons if there are no rows (ie Order Ref 2 & 4) - Having searched the threads and copied the functions from those threads (RadGridView1_ViewCellFormatting,IsExpandable & RadGridView1_ChildViewExpanding)

It just hides them all because rowInfo.ChildRows.Count =0! (as per screen2.jpg)

Can anybody spot where I'm going wrong?

Many thanks

Terry



Public

Class Form1

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

Dim myOrders = New BindingList(Of Order)()

Dim myOrderLines = New BindingList(Of OrderLines)()

myOrders.Add(New Order(1, "01/01/2011", "Order for Warehouse"))

myOrders.Add(New Order(2, "03/05/2011", "Order for home"))

myOrders.Add(New Order(3, "12/05/2011", "Order ref xyz"))

myOrders.Add(New Order(4, "16/05/2011", "Order ref abc"))

myOrderLines.Add(New OrderLines(1, "Power Supply"))

myOrderLines.Add(New OrderLines(1, "Hard Disk"))

myOrderLines.Add(New OrderLines(3, "Keyboard"))

myOrderLines.Add(New OrderLines(3, "Mouse"))

RadGridView1.AutoGenerateHierarchy = False

RadGridView1.AutoGenerateColumns = True

Dim OrderLinesTemplate As New GridViewTemplate

OrderLinesTemplate.AllowAddNewRow = False

OrderLinesTemplate.DataSource = myOrderLines

'RadGridView1.MasterTemplate.Templates.Add(RolesAndPositionTemplate)

Me.RadGridView1.MasterTemplate.Templates.Add(OrderLinesTemplate)

'create the relation

Dim relation As New GridViewRelation(RadGridView1.MasterTemplate)

relation.RelationName = "Order Lines"

relation.ParentColumnNames.Add("OrderId")

relation.ChildColumnNames.Add("OrderLineId")

relation.ChildTemplate = OrderLinesTemplate

Me.RadGridView1.Relations.Add(relation)

Me.RadGridView1.DataSource = myOrders

End Sub

Private Sub RadGridView1_ViewCellFormatting(sender As Object, e As Telerik.WinControls.UI.CellFormattingEventArgs) Handles RadGridView1.ViewCellFormatting

Dim cellX As GridGroupExpanderCellElement = TryCast(e.CellElement, GridGroupExpanderCellElement)

If cellX IsNot Nothing AndAlso TypeOf e.CellElement.RowElement Is GridDataRowElement Then

If Not IsExpandable(cellX.RowInfo) Then

cellX.Expander.Visibility = ElementVisibility.Hidden

Else

cellX.Expander.Visibility = ElementVisibility.Visible

End If

End Sub

Private Function IsExpandable(rowInfo As GridViewRowInfo) As Boolean

If rowInfo.ChildRows IsNot Nothing AndAlso rowInfo.ChildRows.Count > 0 Then

Return True

Else

Return False

End If

End Function

Private Sub RadGridView1_ChildViewExpanding(sender As Object, e As Telerik.WinControls.UI.ChildViewExpandingEventArgs) Handles RadGridView1.ChildViewExpanding

e.Cancel = Not IsExpandable(e.ParentRow)

End Sub

GridView

answered on 24 Jun 2011

1 answer

99 views

Auto suggest functionality in the GridView.

Hi Guys,
We are working in the Q2 SP1 version. I got one Problem in the Auto suggest functionality in the GridViewComboBox Column in the GridView.

My Requirement is: If i enter the letters as "dab", the Resulting options with in the Combobox is starting with the "dab" options with in the ComboBox Column. But now m getting "dab" options is the Last options in the List, I mean before this option, starting options will starts with c Options. If u want more Clarity see the attachment for Normal dropdown, i need the exact requirement in the GridView Combobox Columns. If it is not possible in the Normal GridView Combobox Column, Pls provide the alternative solution to achieve this functionality.

Thanks,
Karthikeya.

GridView

answered on 24 Jun 2011

1 answer

114 views

Change Row Background Color Once a Row is Created

How can I change the background color of a new row that has just been added. I am currently using RowFormatting for other conditions. Basically, I want to show the user when a value in a cell in a row has changed, or when they add a row. Any suggestions?

GridView

answered on 23 Jun 2011

2 answers

101 views

ExportToExcelML and ChildGrid

Hi

Does ExportToExcelML can export grid even if it has ChildGrid?
if Yes any sample code ?

Regards

GridView

answered on 23 Jun 2011

3 answers

87 views

End-User Ungrouping

Under the newest Telerik controls for Winforms (2011.1.11.419) -- Ungrouping seems to have changed. Instead of being able to drag from the group panel to ungroup - you must hit the "X". My users have a problem with this and would prefer the Drag and Drop Ungrouping feature.

Was this removed? And if so, is there a workaround I might employ?

Thanks

GridView

answered on 23 Jun 2011