Questions on UI for WinForms Forum

2 answers

149 views

Unhandled exception when adding tiles programmatically

Hi,

I'm relatively new at programming, so please bare with me.

What I have:

On load fetching image files from folder and creating tiles with those images.

Also, I have an event handler when a file added to folder, to add a new tile.

On load everything works fine and tiles are added. On event, the same sub that generates the tile fails in the "End Sub" with

"An unhandled exception of type 'System.Reflection.TargetInvocationException' occurred in mscorlib.dll" and I'm unable to understand what I'm doing wrong.

My code:

Imports System.IO
Imports System.Diagnostics
Imports Telerik.WinControls
Imports Telerik.WinControls.UI
Imports System.Threading
Imports System.ComponentModel

Public Class GridWindow
Public watchfolder As FileSystemWatcher
Dim itemCol As New List(Of String)
Dim fileCount As Int32

Public Sub fillGrid()
Try

Dim watchfdr As New FileSystemWatcher
watchfdr.Path = My.Settings.sourcefldr
Dim txtFiles = Directory.GetFiles(watchfdr.Path, "*.*", SearchOption.TopDirectoryOnly).[Select](Function(nm) Path.GetFileName(nm))
If txtFiles.Count > 0 Then
For Each filenm As String In txtFiles
itemCol.Add(filenm)
Next
fileCount = itemCol.Count()

End If
If itemCol.Count > 0 Then
For Each filenm In itemCol
AddNewImageTile(filenm)
Next
End If
watchfdr.NotifyFilter = IO.NotifyFilters.DirectoryName
watchfdr.NotifyFilter = watchfdr.NotifyFilter Or _
IO.NotifyFilters.FileName
watchfdr.NotifyFilter = watchfdr.NotifyFilter Or _
IO.NotifyFilters.Attributes

AddHandler watchfdr.Created, AddressOf fileAdded
watchfdr.EnableRaisingEvents = True

Catch ex As Exception
MessageBox.Show(ex.Message)
End Try

End Sub

Private Sub fileAdded(ByVal source As Object, ByVal e As System.IO.FileSystemEventArgs)

Try
If e.ChangeType = IO.WatcherChangeTypes.Created Then
Dim shortPath As String = e.FullPath.Substring(e.FullPath.LastIndexOf("\") + 1)
AddNewImageTile(shortPath)
'itemCol.Add(e.FullPath.ToString())

End If
Catch ex As Exception
MessageBox.Show("Exception in fileAdded: " & ex.Message)

End Try

End Sub

Private Sub AddNewImageTile(ImagePath)
Try
Dim img As Bitmap = CType(Image.FromFile(My.Settings.sourcefldr.ToString & "\" & ImagePath, True), Bitmap)
Dim newTile As New RadTileElement()
newTile.AutoSize = True
newTile.AutoSizeMode = Telerik.WinControls.RadAutoSizeMode.Auto
newTile.GradientStyle = Telerik.WinControls.GradientStyles.Linear
newTile.Image = img
newTile.Padding = New System.Windows.Forms.Padding(1)
newTile.Size = New System.Drawing.Size(214, 276)
newTile.Row = RadPanorama1.Items.Count Mod Me.RadPanorama1.RowsCount
newTile.Column = RadPanorama1.Items.Count / Me.RadPanorama1.RowsCount
newTile.Visibility = ElementVisibility.Visible
Me.RadPanorama1.Items.Add(newTile)

Catch ex As Exception
MessageBox.Show("Exception in AddNewImage: " & ex.Message)
End Try

End Sub

Public Sub New()

' This call is required by the designer.
InitializeComponent()

' Add any initialization after the InitializeComponent() call.
fillGrid()

End Sub

End Class

Panorama

answered on 10 Aug 2015

2 answers

189 views

Openedge Application Theme

In a progress openedge form which inherits from Telerik.WinControls.UI.RadForm, I have added this line into the constructor :

ThemeResolutionService:ApplicationThemeName = "visualStudio2012Dark" .

However the theme is not being applied to the application.

Can someone please help out?
Thanks

Themes and Visual Style Builder

answered on 10 Aug 2015

1 answer

121 views

Appointment not Bind to Resource

The appointment not showed when RadScheduler1.GroupType = GroupType.Resource

   dt = ObjDS.Tables(0)
dt2 = ObjDS2.Tables(0)

appointmentMappingInfo.Start = "StartTime"
appointmentMappingInfo.End = "EndTime"
appointmentMappingInfo.Summary = "TaskDetails"

resourceMappingInfo.Id = "StaffID"
resourceMappingInfo.Name = "StaffFullName"



SchedSource.EventProvider.Mapping = appointmentMappingInfo
SchedSource.EventProvider.DataSource = dt
SchedSource.ResourceProvider.Mapping = resourceMappingInfo
SchedSource.ResourceProvider.DataSource = dt2


RadScheduler1.DataSource = SchedSource
RadScheduler1.GroupType = GroupType.Resource

Scheduler and Reminder

answered on 07 Aug 2015

2 answers

304 views

Hierarchical Grid remove + empty Child

Hi everyone,

I've got a Hierarchical grid in my form. All of my Parent row have a button "+" to allow user to expand children row even if they haven't any child.

Is there any way to hide this button when a parent doesn't have any child.

Thanks in advance.

Best regards

Tony

GridView

answered on 06 Aug 2015

3 answers

118 views

[Solved] Exception when trying to view child row in hierarchical grid

I'm trying to figure out how to programmatically set up a hierarchical grid bound to a collection of objects. When I run the code shown below I get an exception when trying to expand the parent rows

In the form code behind-

public Form1()

{

InitializeComponent();

List<Parent> parents = new List<Parent> ();

parents.Add(CreateParent("Joe"));

parents.Add(CreateParent("Bob"));

this.parentBindingSource.DataSource = parents;

}

private static Parent CreateParent (string parentName)

{

var parent = new Parent () {ParentName = parentName};

String childName = String.Format ("Child of {0}", parentName);

parent.Children.Add(new Child() { Age = 2, ParentName = parentName, ChildName = "Child" });

return parent;

}

Data class

public class Parent

{

private List<Child> m_children = new List<Child> ();

public String ParentName { get; set; }

public MyEnum FirstSecond { get; set; }

public List<Child> Children { get { return m_children; } private set { m_children = value; } }

}

public class Child

{

public String ChildName { get; set; }

public String ParentName { get; set; }

public MyEnum FirstSecond { get; set; }

public int Age { get; set; }

}

public enum MyEnum

{

First,

Second

}

GridView

answered on 06 Aug 2015

1 answer

128 views

StepAreaSeries

Is there no StepAreaSeries available for the Winforms ChartView controls? I'd like to build a histogram, and this seems like the most obvious series to choose for histogram display.

ChartView

answered on 05 Aug 2015

1 answer

139 views

Display field control

Hi Telerik support team,

May I know which control able to do this kind of display field(including the background color of blue and pink)? Please refer to the attachment.

Thank you.

Best regards,

Nicholas

General Discussions

answered on 05 Aug 2015

2 answers

119 views

Inquiry on chartView

Hi,

May I know Telerik Winforms could do these 3 features in properties settings instead of using coding(Please refer to the attachment)? If yes please provide the steps to do this. If no, please provide advice or solutions to do these features.

Thank you.

Best regards,

Nicholas

ChartView

answered on 05 Aug 2015

1 answer

122 views

Override GridTimeDateTimeColumn autofilling to current time

Hi,

I have a time column on a RadGridView. If the field is null, it defaults to the current time of day when the user starts typing in a new value. I want to change this behavior.

I need it to remain blank, and then default to 00:00 when the user start typing. FYI, the property on the datasource is a nullable DateTime.

Thanks.

GridView

answered on 04 Aug 2015

1 answer

1.1K+ views

MVC Dropdownlist inside Kendo MVC grids only selects first value.

I have a grid which shows employee data and enable user to edit the data. When edit command is pressed, it displays dropdown list for one of the column(Name). The dropdown value gets displayed without any issue however when edit command is pressed, the existing value within the dropdown gets hidden and first value '- Select -....' get displayed.

P.S: i followed this tutorial to add dropdown in Kendo Grid: http://www.sitereq.com/post/kendo-mvc-dropdown-lists-inside-inline-kendo-mvc-grids

Code Behind:

class EmployeeItem

{

public string Name{get; set;}

public string Code1{get;set;}

public string Code2{get;set;}public string CombinedValues{get;set;} //this is combination of Name, Code1, Code2 delimited by comma

}

Controller Code:

List<EmployeeItem> employeeList = service.GetEmployeeList();

ViewBag.EmployeeList = new SelectList(employeeList, "CombinedValues", "Name");

EditorTemplate Code (_EmployeeDropDown.cshtml):

@(Html.Kendo().DropDownList()

.BindTo((IEnumerable)ViewBag.EmployeeList)

.OptionLabel("- Select - ")

.DataValueField("Value")

.DataTextField("Text")

.Name("EmployeeData")

)

View Code:

@(Html.Kendo().Grid(Model.employeeDetails)

.Name("GridEmployeeDetails")

.Columns(columns =>

{

columns.Command(command => { command.Edit(); }).Width("180px").Title("Action");

columns.Bound(e => e.Name).Width("210px").EditorTemplateName("_EmployeeDropDown")

.ClientTemplate("#:EmployeeData#");

})

So if the employeeList have values something like this:
Name = John, Code1 = 1, Code2 = 2, CombinedValues = John,1,2
Name = Matt, Code1 = 21, Code2 = 50, CombinedValues = Matt, 21, 50

In the grid, when i first view the grid it displays the Name, John in first row, Matt in second row. If i edit Matt row, the dropdown will show up with '-Select-' as selected value instead of 'Matt'.
Does anyone know how i can achieve that?
Also, once i make selection on dropdown, let's say from Matt to John, and hit inline Save button now the value changes to CombinedValues i.e. John,1,2 instead of just John under Name column.

DropDownList

answered on 04 Aug 2015