Questions on UI for WinForms Forum

2 answers

136 views

Validation with business rules in dataset

I've got a simple RadGridView bound to a DataTable (through a BindingSource); standard and easy way to put a gridview on a form dragging it from datasources box.
I've implemented my business rule validation in the datatable, as below:

Private Sub OperazioniDataTable_ColumnChanging(ByVal sender As System.Object, ByVal e As System.Data.DataColumnChangeEventArgs) Handles Me.ColumnChanging

Debug.Print("ColumnChanging: column=" & e.Column.ColumnName)

If (e.Column.ColumnName = Me.impovalColumn.ColumnName) Then

If CType(e.ProposedValue, Decimal) = 0 Then

e.Row.SetColumnError(e.Column, "Inserire un importo diverso da zero")

Else

e.Row.SetColumnError(e.Column, "")

End If

End Sub

When I edit the [impoval] cell and enter 0, moving to another cell/row raises the ColumnChanging event, but no feedback at all on the grid.
Another issue: if I press [Escape] key in the cell, the value is not restored to the old one.
In the standard MS grid I get feedback and restore behaviour.
I would like to know the best practices to enforce data validation (on single cells and on row, moving away from a cell/row and/or trying to close a form, etc.), possibly avoiding to put rules in the gridview events, in order to keep all the business rules validation code in the data transfer objects.
Please don't suggest to create separate business objects, as I want to avoid this coding overhead.
TIA
Ubaldo

GridView

answered on 26 Jan 2011

6 answers

116 views

Alternate For Updating Row Event

Hi....
Which is the event for Updating Cell And Updating Record...
I m using CurrentRowChanging Event For this but this event fires evertime i fill the dataset which is bound to the Grid...
I want an event which will fire only when I Update a row and come out of that row...

GridView

answered on 26 Jan 2011

19 answers

202 views

Please help me to find out the Break mechanism of Radschedular

Please help to findout out the break mechanism of rad schedular..what i want is when a person have schedules break from 1 to 2(1 hr) then this time slot is not editable or Appointment...

Scheduler and Reminder

answered on 26 Jan 2011

10 answers

813 views

filter grid with a text box text

Hi guys.
I use win forms . and telerik gridview.
How can I filter a radgridview with a textbox_keypress. not by radgrid's filter?(while I am typing in textbox, rad grid view data is filter)
is it possible?
thnx.

GridView

answered on 26 Jan 2011

2 answers

121 views

Telerik.Charting.ChartSeriesItem

Hi

How can i clear ITEMS from Telerik.Charting.ChartSeriesItem ???

for example :

dim list as new list of single
and easily i can clear items like list.clear

but i am confused about ChartSeriesItem :)

Chart (obsolete as of Q1 2013)

answered on 26 Jan 2011

2 answers

84 views

Deployment question

I have the need to deploy multiple applications that use the rad controls. In general, I need to deploy the 2 DLL's telerikcommon and telerikwincontrols. Rather than have them deploy with each application, I want to have a seperate deployment of these 2 dlls to the gnc and then have them marked are pr-requesites for the other application deployments. I am not sure how this can be accomplished. Any help you can provide in this matter will be greatly appreciated.

General Discussions

answered on 26 Jan 2011

2 answers

116 views

RadGridView Column Display Error

Hi,
After attaching a datasource to a radgridview , I apply best fit on the entire grid. But sometimes my grid behaves wierd and gives me something like the attached image. Please help.

Thanks a lot
Shweta

GridView

answered on 26 Jan 2011

4 answers

157 views

Having problems with CRUD using entities

Ok i am using Entity Framework to access my data, I have no problem adding a record or deleting a record. But when I want to update a record I cant figure out what events to capture.

I have tried adding a RadGridView1_RowsChanged to the code and it works great for the update, but my problem occurs now that when I add a record to the grid RadGridView1_RowsChanged gets called before RadGridView1_UserAddedRow.

In fact the NotifyCollectionChangedAction.ItemChanged gets called before NotifyCollectionChangedAction.Add gets called
So as soon as I leave a cell in the row my itemchanged fires before the add and i get problems.

How can i idenitfy if row is being added instead of updated. I sue wish there was a UserUpdatedRow event

Any help is appreciated

Public Class ManageMemberType

Public context As New MIMSModel.MIMSEntities

Dim newMemType As MemType

Dim updMemType As MemType

Dim dmemtype As MemType

Dim rtype As String

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

Dim query = (From m In context.MemTypes Select m).ToList

RadGridView1.DataSource = query

End Sub

Private Sub RadGridView1_RowsChanged(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.GridViewCollectionChangedEventArgs) Handles RadGridView1.RowsChanged

If e.Action = Telerik.WinControls.Data.NotifyCollectionChangedAction.ItemChanged Then

Dim updrow As GridViewDataRowInfo = CType(e.NewItems(0), GridViewDataRowInfo)

updMemType = MemType.CreateMemType(updrow.Cells("Type").Value.ToString)

updMemType.Desc = updrow.Cells("Desc").Value.ToString

DataAccess.UpdateEntity(updMemType, "MemTypes")

End If

End Sub

Private Sub RadGridView1_UserAddedRow(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.GridViewRowEventArgs) Handles RadGridView1.UserAddedRow

newMemType = MemType.CreateMemType(e.Row.Cells.Item("Type").Value.ToString)

newMemType.Desc = e.Row.Cells.Item("Desc").Value.ToString

Try

context.MemTypes.AddObject(newMemType)

context.SaveChanges()

MsgBox("record Added")

Catch ex As UpdateException

e.Row.Delete()

MsgBox(String.Format("The object could not be added. Make sure that a Member type of '{0}' does not aleady exist.", newMemType.Type))

End Try

End Sub

Private Sub RadGridView1_UserDeletingRow(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.GridViewRowCancelEventArgs) Handles RadGridView1.UserDeletingRow

rtype = e.Rows(0).Cells(0).Value.ToString()

Dim rcount = (From r In context.GetCompanyInfoes Where r.CompanyType = rtype Select r).Count

If rcount > 0 Then

MsgBox("There are " + rcount.ToString + " companies assigned to this member type, You cannot delete this type")

Else

Try

dmemtype = MemType.CreateMemType(rtype)

DataAccess.DeleteEntity(dmemtype, "MemTypes")

Catch ex As Exception

MsgBox("There was a problem deleting the Member type of " + rtype + " Please notify IT")

End Try

End If

End Sub

End Class

GridView

answered on 25 Jan 2011

1 answer

86 views

Q3 Rad Controls

I got the new version Q3 2010 after I was using 2009 Q2
I uninstalled all 2009 files and installed the new Q3
Now, all my old applications that I developed using Telerik Controls are giving errors and I spend hours repairing references
is there any solutions?

General Discussions

answered on 25 Jan 2011

6 answers

114 views

RadMenu DragNDrop

Hello. I have been using Telerik for a while and i must say i am very impressed. There isn't almost anything that we can't do.
But this time i run into a problem, as i wanted to apply drag and drop in my radmenu and it does not have such implementation. Maybe i am missing something, but is there anyway to implement this?
Thanks in advance,
Bes regards, Rui Silva

Menu

answered on 25 Jan 2011