Questions on UI for WinForms Forum

1 answer

198 views

TextBox Style

Hi,
The TextBox's backcolor is the same no matter it's in editor state or readonly state, and i can't tell it's state from it's appreance.
I want it's backcolor changes when it turns to readonly state. Is there any easy way to do this?

Looking forward to your replay.

BRS
zeng

TextBox

answered on 19 May 2010

2 answers

232 views

System.NullReferenceException

I have a form in a WindowsApplication with just a RadTreeNode on it.

    
            Imports System  
        
            Imports Telerik.WinControls.UI  
        
            Public Class Form1  
        
                Inherits Form  
        
                Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load  
        
                    InitializeComponent()  
        
                    Dim node As RadTreeNode = RadTreeView1.Nodes("Email Contacts").Nodes.Add("Bob Tony")  
        
                    node.Selected = True 
        
                    RadTreeView1.Nodes("Email Contacts").Nodes.Add("Sue Winchell")  
        
                    RadTreeView1.Nodes("Email Contacts").Nodes.Add("Lui Sang")  
        
                    RadTreeView1.Nodes("Lists").Nodes.Add("Priorities")  
        
                    RadTreeView1.Nodes("Lists").Nodes.Add("Opportunities")  
        
                    RadTreeView1.Nodes("Lists").Nodes.Add("Issues")  
        
                End Sub 
        
            End Class

This is from your example.
On reaching this line:
Dim node As RadTreeNode = RadTreeView1.Nodes("Email Contacts").Nodes.Add("Bob Tony")
I keep getting the error:
System.NullReferenceException was unhandled
Message="Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt."

What's happening and how do I correct it?

Thanks in advance
Karl

Treeview

answered on 19 May 2010

1 answer

245 views

CellElement null

Hi,

I have problems with VS2010 and the newest Version with the GridView. I can't set the Font and other properties, because the CellElement is null. The same code works with VS2008 and the GridView from the last year.

Is that a known problem?

Greetings

Konrad

private void radGridView1_ViewRowFormatting(object sender, RowFormattingEventArgs e)

{

...
...

e.RowElement.GradientStyle =

GradientStyles.Solid;

e.RowElement.RowInfo.Cells[

"Nr"].CellElement.Font = _einzelRingFontNr;

e.RowElement.RowInfo.Cells[

"Ring"].CellElement.Font = _einzelRingFontRing;

e.RowElement.RowInfo.Cells[

"Teiler"].CellElement.Font = _einzelRingFontTeiler;

e.RowElement.RowInfo.Cells[

"Pos"].CellElement.Font = _einzelRingFontPosition;

GridView

answered on 19 May 2010

1 answer

92 views

Problem using desert theme on treeview in Office2010 themed app

Hi All

I have an app using the Office2010 theme.

But we prefer the desert theme for our tree view. I used this code to force the theme

        private static void ForceTreeviewTheme(RadTreeView tv)
        {
           // tv.EnableTheming = false;
            tv.ThemeName = "Desert";
            tv.RootElement.ForceReApplyStyle();
            tv.RootElement.ForceApplyTheme();
        }

It worked ok but the node back colours were still Office2010 grey and I cannot see the node selection colour when I click and select a node.
If I do not disable theming or re-enable it I get the Office 2010 theme again, making me think I have not actually applied the theme at all!

What is the best way to achieve this goal?

Thanks

Treeview

answered on 19 May 2010

1 answer

141 views

Problem with rows when filter is active

Hi,

I am filtering a checkbox column. When Filter is active, logically, only rows, which the checkbox column accept the filter criterium, are shown.

The problem is..., ¿where are the rest rows??? ¿Where are the rows which aren't shown?

Only a checkbox can be active. The checkbox column can not have two rows with the checkbox cell set to true.

Then, when the user click the checkbox and the value is true, I programaticly find in the all gridview's row and find the other row whose checkbox cell is true. I set this cell to false. This works fine.

The problem is when the filter is active, if the filter is filtering the checkbox column when the cell is set to false, when the user set to true the row, I can not find the other row whose checkbox cell is set to true.

¿How do I this ???

I am thinking not permit to the user edit rows when filter is active. But..., ¿How do I know when the filter is active?

Thank you,

Fernan

GridView

answered on 19 May 2010

5 answers

266 views

GroupByExpression

Hi,

I have GridView which is a flat structure allowing the user to group by most of the columns.

for e.g. i am trying to show the task list of the user where I have

Priority, Task Name, Task Desc, Source, Count as columns
High, Process A, Account:123, Mobile, 20 as row
High, Process A, Account 124, Web, 40 as row
Low.....
Med....

my questions are:
1. can we disqualify some of the columns to be used by groupby by the user.
2. When I group by priority column, I shoud get the count next to the group by column, I have enclosed the ping with the image and what I want (marked in red). I want to get rid of the count column in the display and the summary row.

any advice with sample program will of great help and thanks in advance.

Regards,
Khizar

GridView

answered on 19 May 2010

5 answers

227 views

[Solved] Resource Grouping and Custom Appointment class

I cant get my custom appointment class to be related with my resources.
I follow the forum examples about custom appointment class.

In the form I do the following:

    
            public frmScheduler() 
        
                    { 
        
                        InitializeComponent(); 
        
                        this.schedQuickTasks.AppointmentFactory = new QuickTaskFactory(); 
        
                        this.schedQuickTasksBindingSource.EventProvider.AppointmentFactory = schedQuickTasks.AppointmentFactory;       
        
                        #region QuickTask custom dialog mappings 
        
                        AppointmentMappingInfo appointmentMappingInfo = schedQuickTasksBindingSource.EventProvider.Mapping as AppointmentMappingInfo; 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("ID", "ID")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("ProjectID", "Project_ID")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("Description", "Description")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("TaskTypeID", "TaskType_ID")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("CustomerDeadline", "CustomerDeadline")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("OurDeadline", "OurDeadline")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("UserID", "User_ID")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("CustomerImportance", "CustomerImportance")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("OurImportance", "OurImportance")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("OrderForUser", "OrderForUser")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("TimeEstimation", "TimeEstimation")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("Comments", "Comments")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("TaskStatus", "Status")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("DateEntered", "DateEntered")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("AssignerID", "AssignerUser_ID")); 
        
                        appointmentMappingInfo.Mappings.Add(new SchedulerMapping("Start", "DateEntered")); 
        
                        appointmentMappingInfo.ResourceId = "User_ID"; 
        
                        #endregion 
        
                        #region Resources custom mapping 
        
                        ResourceMappingInfo resourceMappingInfo = new ResourceMappingInfo(); 
        
                        resourceMappingInfo.Id = "User_ID"; 
        
                        resourceMappingInfo.Name = "FullName"; 
        
                        schedQuickTasksBindingSource.ResourceProvider.Mapping = resourceMappingInfo; 
        
                        #endregion 
        
                    }

the Appointment class is the "QuickTask" and the Users are the resources.
If I disable resource grouping the Appointments are displayed.If I enabled it,only the resources are shown.
Am I missing something?

Thank you very much for your time

Scheduler and Reminder

answered on 19 May 2010

1 answer

135 views

Problem for pie chart

Hi,

I have a problem when I try to create pie chart. I have two series in my chart. Each series have data from January to December. That is say when the series type is Bar, there are 12 labels on XAxis. It's correct. But when I try to change the type to Pie. The RadChart can only display two pies, each pie displays the value of the 12 months. That is not what I want...

My scenario is the pie chart can display 12 pies, each pie can display the value of the two series data of the month.

For example: I have two series "Series1" and "Series2", the value in May is "50" and "30". The pie chart should display 12 pies and in the fifth pie, it should display the percentage of 50 and 30.

Could anyone help me? Thank you very much.

Chart (obsolete as of Q1 2013)

answered on 19 May 2010

3 answers

111 views

List Box - 100,000 records - how to return after typing X chars

Hi,

We have some list boxes with several thousand (some over 100,000) retuned records. Obviously this can be very slow to load all these items in a list box (and a straight list of this many items is pretty hard to navigiate!). What we would like is a sublist to return after an X numbers of chars have been typed and only the matching results returned.

Could you advise on how this could be acomplished.

Thanks

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 18 May 2010

7 answers

208 views

Event for Appointment created?

Does an event who fires when an Appointment is created exists? For example, when the Appointment Factory creates an appointment based in Database data.
My purpose is to calculate dynamical the start date of an appointment based on the end date.

Scheduler and Reminder

answered on 18 May 2010