Questions on UI for WinForms Forum

5 answers

231 views

Selecting multiple items from code

How do i select multiple items from code in a list box or combo box?

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 19 Jan 2010

1 answer

191 views

Source Code: Make RadComboBox act like WinForms ComboBox when Style is DropDownList

I'm posting a source code solution to force the RadComboBox to act like a Windows Forms ComboBox when the DropDownStyle is DropDownList. This is common functionality that has been missing for far too long. This works with 2009 Q2 SP1. The code I'm supplying is a wrapper class.

    
            using System; 
        
            using System.Collections.Generic; 
        
            using System.Linq; 
        
            using Telerik.WinControls; 
        
            using Telerik.WinControls.UI; 
        
            /// <summary> 
        
            /// Wrapper class to make RadComboBox act like a WinForms ComboBox  
        
            /// when DropDownStyle is DropDownList 
        
            /// </summary> 
        
            /// <!--Author: Michael Gerety--> 
        
            public class WorkingDropDownList : RadComboBox 
        
            { 
        
                private char _lastChar; 
        
                private int _lastIndex; 
        
                private Dictionary<char, List<RadComboBoxItem>> _cache; 
        
                public override string ThemeClassName 
        
                { 
        
                    get 
        
                    { 
        
                        return "Telerik.WinControls.UI.RadComboBox"; 
        
                    } 
        
                    set 
        
                    { 
        
                        base.ThemeClassName = value; 
        
                    } 
        
                } 
        
                public WorkingDropDownList() 
        
                { 
        
                    KeyPress += ComboBox_KeyPress; 
        
                    _cache = new Dictionary<char, List<RadComboBoxItem>>(); 
        
                    Items.ItemsChanged += new ItemChangedDelegate(Items_ItemsChanged); 
        
                } 
        
                void Items_ItemsChanged(RadItemCollection changed, RadItem target, ItemsChangeOperation operation) 
        
                { 
        
                    //If the items collection changes, we need to remove the cache for the character affected. 
        
                    if(target.Text != null) 
        
                    { 
        
                        var changedChar = Char.Parse(target.Text.Substring(0, 1)); 
        
                        if(_cache.ContainsKey(changedChar)) 
        
                        { 
        
                            _cache.Remove(changedChar); 
        
                        } 
        
                    } 
        
                } 
        
                void ComboBox_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) 
        
                { 
        
                    if (DropDownStyle == RadDropDownStyle.DropDownList) 
        
                    { 
        
                        if (Char.IsLetter(e.KeyChar)) 
        
                        { 
        
                            if (Char.ToUpper(e.KeyChar) != _lastChar) 
        
                            { 
        
                                _lastChar = Char.ToUpper(e.KeyChar); 
        
                                _lastIndex = 0; 
        
                                if (!_cache.ContainsKey(_lastChar)) 
        
                                { 
        
                                    var list = (from i in Items 
        
                                                where (i as RadComboBoxItem).Text.ToUpper().StartsWith(_lastChar.ToString()) 
        
                                                select (RadComboBoxItem)i).ToList(); 
        
                                    _cache.Add(_lastChar, list); 
        
                                } 
        
                            } 
        
                            if (_lastIndex >= _cache[_lastChar].Count) 
        
                            { 
        
                                _lastIndex = 0; 
        
                            } 
        
                            if (_cache[_lastChar].Count > 0) 
        
                            { 
        
                                SelectedItem = _cache[_lastChar][_lastIndex]; 
        
                            } 
        
                            _lastIndex++; 
        
                        } 
        
                    } 
        
                } 
        
            }

Note: I'm using LINQ to build the cache lists so this requires .net 3.5. This can be changed to work with .net 2.0 by replacing the LINQ query with a custom "Get entries starting with 'X'" type of function that iterates through the collection.

Note 2: Updated code to deal with list items changing.

I'm also assuming that you're using this code with a databound combo box where the bound items are not changing. If they are subject to change, make sure that you

I hope this helps out anyone with the same issue.

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 19 Jan 2010

1 answer

120 views

Removing Times

Hello,

Is there a way to remove time slots entirely from the day view. I don't want to see the slots whether they are blank or filled. For instance I don't want to display times from 8am - 12pm time on my day view whether there is an appointment or not.

Any help appreciated!
Thanks in advance.

Scheduler and Reminder

answered on 19 Jan 2010

1 answer

101 views

Current Index , Change without click

Hi,

Is it possbile to change the selected index on the datagrid view, I've tried to modify RadAlertsPanel.CurrentRow.ViewInfo.CurrentIndex But had no luck....

I'm new to this so any help would be appreciated.

Thanks Hayden

GridView

answered on 19 Jan 2010

1 answer

281 views

Text versus SelectedValue

Hi,
Can you explain the correct usage of the RadMultiColumnComboBox SelectedValue and Text properties. It seems that they are not always in sync. For example when the DataSource is set, the SelectedIndex == 0, SelectedValue == value of Item[0], but the Text property == "".

I'm trying to determine when I should (or could) use the Text property. If I use it to "set" the Text property does the SelectedIndex/Item/Value also get set?

What event causes the Text property to be set? Is it after an event is finished?

Thanks,
Mike

MultiColumn ComboBox

answered on 19 Jan 2010

1 answer

85 views

DayView Problem

Hello,

I have RadScheduler working with WeekView and MonthView, but when I click on DayView nothing shows. Any ideas?

Any help appreciated!
Thanks in advance.

Scheduler and Reminder

answered on 19 Jan 2010

2 answers

342 views

RadScheduler Navigation Calendar Not Working

Hello,

I've used the Rad Scheduler for a while now the navigation popup calendar is not causing the date of the scheduler to change. I believe this began shortly after changing to the 2009Q3 release.

Anything you can do to help is greatly appreciated.

Key Points:
1. Data Binding: The data is bound to the scheduler on the server side code where data is retrieved from the database and looped through to create a list<appointment> of appointment objects.
2. Navigation Arrows: These were not working either, but after we made the setting of the startdate, enddate, and timezone offset be in an If(!IsPostback) block, the arrows now work (not the calendar)
3. The control has been placed on a page with no other controls and the problem persists

Below is the client code:

    
            <pro:RadAjaxManager ID="RadAjaxManager1" EnableAJAX="true" runat="server" OnAjaxRequest="RadAjaxManager1_AjaxRequest"> 
        
                <AjaxSettings> 
        
                    <pro:AjaxSetting AjaxControlID="CalendarRadScheduler"> 
        
                        <UpdatedControls> 
        
                            <telerik:AjaxUpdatedControl ControlID="CalendarRadScheduler" LoadingPanelID="RadAjaxLoadingPanel1" /> 
        
                        </UpdatedControls> 
        
                    </pro:AjaxSetting> 
        
                </AjaxSettings> 
        
            </pro:RadAjaxManager> 
        
            <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel2" runat="server" /> 
        
                    <pro:RadScheduler  
        
                        ID="CalendarRadScheduler"  
        
                        runat="server"  
        
                        EnableAjaxSkinRendering="false" 
        
                        Height="750px"  
        
                        Width="578px"  
        
                        ShowAllDayRow="False"  
        
                        AllowDelete="False"  
        
                        AllowEdit="False" 
        
                        AllowInsert="False"  
        
                        Skin="Office2007" 
        
                        HoursPanelTimeFormat="h:mm tt"  
        
                        MinutesPerRow="15"  
        
                        ShowFullTime="True" 
        
                        StartEditingInAdvancedForm="false" 
        
                        DataKeyField="ID"  
        
                        DataSubjectField="Subject"  
        
                        DataStartField="Start"  
        
                        DataEndField="End" 
        
                        DataRecurrenceField="RecurrenceRule"  
        
                        DataRecurrenceParentKeyField="RecurrenceParentID" 
        
                        DayEndTime="18:30:00"  
        
                        DayStartTime="08:00:00"  
        
                        ShowFooter="false"  
        
                        OnClientAppointmentInserting="AppointmentInserting" 
        
                        OnClientAppointmentDoubleClick="AppointmentDoubleClick"  
        
                        OnAppointmentCreated="CalendarRadScheduler_AppointmentCreated"  
        
                        OnAppointmentDataBound="CalendarRadScheduler_AppointmentDataBound"  
        
                        CustomAttributeNames="NetworkId"  
        
                        OnAppointmentCommand="CalendarRadScheduler_AppointmentCommand"  
        
                        OnFormCreating="CalendarRadScheduler_FormCreating"> 
        
                        <AppointmentTemplate> 
        
                            <div> 
        
                                <%# FormatCalendarMessage() %> 
        
                                <span style="text-align:right; vertical-align:top; width:100%;"> 
        
                                 <asp:ImageButton Enabled="true" Visible="false" ID="ibtnEdit" runat="server" CommandName="EditMessage" 
        
                                            ToolTip="Edit" AlternateText="Edit" CausesValidation="false" CssClass="linkButton" 
        
                                            ImageUrl="~/images/edit.gif" OnClientClick="ChangeImg(this.id, 'loading');" /> 
        
                                &nbsp; 
        
                                <asp:ImageButton Enabled="true" Visible="false" ID="ibtnCopy" runat="server" CommandName="CopyMessage" 
        
                                            ToolTip="Create Copy" AlternateText="Create Copy" CausesValidation="false" CssClass="linkButton" 
        
                                            ImageUrl="~/images/copy.gif" OnClientClick="ChangeImg(this.id, 'loading');" /> 
        
                                </span> 
        
                            </div> 
        
                        </AppointmentTemplate> 
        
                    </pro:RadScheduler>

Scheduler and Reminder

answered on 18 Jan 2010

6 answers

282 views

serious issue radform com visibility

hi,

i am opening google maps in a browser control in radform. for this i need to to set com visibilty to true to communicate with javascript in locally hosted web page.

my code :

using System.Runtime.InteropServices;

using System.Security.Permissions;

// Make COM Visible to communication with other App

[ComVisibleAttribute(true)]

// Set Security Level to Full Trust inorder to enable external Javascript function invokes and data passing

[PermissionSet(SecurityAction.Demand, Name = "FullTrust")]

works perfect in simple .net forms

but gives error in rad form....

error:

A QueryInterface call was made requesting the default IDispatch interface of COM visible managed class 'TcpMappingServer.LivePlayAVL'. However since this class does not have an explicit default interface and derives from non COM visible class 'Telerik.WinControls.UI.RadForm', the QueryInterface call will fail. This is done to prevent the non COM visible base class from being constrained by the COM versioning rules.

Anysolution Please, ineed it quickly, if radform wont work will the shaped form work...

or any other solution with radform.

thanks in advance!!!

Form

answered on 18 Jan 2010

1 answer

136 views

3d Graph ?

Hi telerik ,
Can you please tell me that on latest release WIN Form Control 3d Graph have supported or not,

Thanks,
Khalid

Chart (obsolete as of Q1 2013)

answered on 18 Jan 2010

3 answers

296 views

RadItem Collection Editor

I'm using the RadItem Collection editor to add items to my combobox. I see a place to enter the display text but where can I enter a value that I can use within c#? I'm trying to use my combobox's SelectedValue property but it comes back as null. Why would selectedtext come back as "" when it has been selected?

Thank You

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 18 Jan 2010