Questions on UI for WinForms Forum

2 answers

283 views

[Solved] Set readonly property on the cell level

Is it possible to set the readonly property of a single cell in a row or column? I want certain cells to be readonly based on other data in the row.

Thanks

GridView

answered on 15 Nov 2010

3 answers

457 views

Getting System.Reflection.TargetInvocationException error when setting datasource

I updated to version 2010.3.10.1109 from 2010.2.10.914 and when I set the datasource I now get TargetInvocationException
"Exception has been thrown by the target of an invocation.". It was working fine in the previous version.

Any ideas?

Thank you,
Aaron

GridView

answered on 15 Nov 2010

2 answers

170 views

Memory leak after scheduler refresh

Hi

I have scheduler with resources showed in timeline view. Every 5 second scheduler is refreshed (check if there is any changes in scheduler data source). After that, for some reason, resources lose their color (became gray), so they need to be repainted, like this:

For Each res As Resource In RadScheduler1.Resources

res.Color = Color.Aquamarine

Next

To ensure that resources are repainted, I need to call this part of code:

Dim schtimelineGrouping As TimelineGroupingByResourcesElement = TryCast(RadScheduler1.SchedulerElement.ViewElement, TimelineGroupingByResourcesElement)

schtimelineGrouping.RefreshViews(True)

schtimelineGrouping = Nothing

And it seems that this procedure RefreshViews make a problem with memory leak.

To be sure, I created a test application which every 5 second execute only coloring and refreshing of scheduler resources, for example:

For Each res As Resource In RadScheduler1.Resources

res.Color = Color.Aquamarine

Next

Dim schtimelineGrouping As TimelineGroupingByResourcesElement = TryCast(RadScheduler1.SchedulerElement.ViewElement, TimelineGroupingByResourcesElement)

schtimelineGrouping.RefreshViews(True)

schtimelineGrouping = Nothing

In a short period of time (1 hour) application increased memory usage from 44MB to over 100MB.

In a real application memory usage growth to more than 1.5GB, and than Out of Memory exception occurred. For a testing purposes application was working almost for a 24 hours.

Is this a good approach of resource coloring, and how this can be fixed?

Thanks.

Scheduler and Reminder

answered on 15 Nov 2010

5 answers

276 views

Align cells to export

I have the following problem in windows application.

I am creating columns by code and then adding rows. As in the following example:

textcolum dim as gridviewtexboxcolumn
textcolum = new gridviewtexboxcolumn
textcolum.fieldname = "name"
textcolum.textalignment = contentaligment.middlecenter
....
....

rowinfo = me.GRID.rows.addnew ()
rowinfo.cells (0). value = "Peter bad"

export to excel, the column name is not justified to center, as I indicated in the code, but is justified on the left.

help please!

GridView

answered on 15 Nov 2010

0 answers

216 views

ToolStrip obsolete as of Q3 2010. Replaced by RadCommandBar

The brand new RadCommandBar is the successor of RadToolStrip. It is a flexible control for adding tool and button strips, which complement application menus in most Windows applications. The new control will come with the same features as the obsolete product (such as horizontal and vertical orientation, docking, drag and drop tool rearrangement, Add/Remove tools, etc.), but will also provide several new vital features:

Completely new and easier design-time support;
Theme and Visual Style Builder support;
Auto-collapse on form resize.

The old RadToolStrip control will be supported for at least one year, but users will be encouraged to use the new control since it addresses the shortcomings of the previous one. Telerik will be glad to assist you with upgrading to the new version. To get technical support, either contact Telerik support or post in the CommandBar Forum.

Toolstrip (obsolete as of Q3 2010)

asked on 15 Nov 2010

2 answers

174 views

How to add custom 'Add Appointment' page for telerik scheduler?

I am trying to create a custom add page for appointments for telerik scheduler. I want my page to be displayed rather than the add appointment template built in the scheduler. I looked at the Advanced Insert Template but I don't think it allows redirecting to a custom page.

Scheduler and Reminder

answered on 15 Nov 2010

2 answers

279 views

[Solved] Changing RadGridView cell backcolor

I am populating a RadGrid, and afterwards, I want to loop through the rows and change the backcolor based on the data in one of the columns. I cannot make it work. Any suggestions? This is a VB.Net winforms application.

Thanks

GridView

answered on 15 Nov 2010

3 answers

161 views

[Solved] Multiselection with SHIFT + HOME, SHIFT + END.

Hi

For example in Windows explorer there is nice functionality for selecting items (rows):
SHIFT + HOME (select items from first to current), SHIFT + END (select items from current to last item).

How can I enable this functionality in RadGridView for rows?
By default those shortcuts select first and last cell in current row.

Regards

GridView

answered on 15 Nov 2010

3 answers

473 views

ComboBox Text Alignment

Hi all,
I have the problem that the text inside the combobox after selection is right align ?!
(see screenshot)
I find similiar posts here but not really a solution.
Is it possible to set the alignment programmatically ?

ASPX

    
            <%@ Page Language="C#" AutoEventWireup="true" CodeFile="ComboBox.aspx.cs" Inherits="ComboBox" %> 
        
            <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
        
            <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="rad" %> 
        
            <html xmlns="http://www.w3.org/1999/xhtml"> 
        
            <head runat="server"> 
        
                <title></title> 
        
            </head> 
        
            <body> 
        
                <form id="form1" runat="server"> 
        
                <rad:RadScriptManager ID="uxRadScriptManager" runat="server"></rad:RadScriptManager>  
        
                <rad:RadComboBox ID="RcbFarAway" runat="server" ></rad:RadComboBox>     
        
                </form> 
        
            </body> 
        
            </html>

CS

    
            using System; 
        
            using System.Collections.Generic; 
        
            using System.Linq; 
        
            using System.Web; 
        
            using System.Web.UI; 
        
            using System.Web.UI.WebControls; 
        
            public partial class ComboBox : System.Web.UI.Page 
        
            { 
        
                protected void Page_Load(object sender, EventArgs e) 
        
                { 
        
                    RcbFarAway.Items.Clear(); 
        
                    RcbFarAway.ID = "RcbFarAway"; 
        
                    RcbFarAway.Width = Unit.Pixel(100); 
        
                    RcbFarAway.DropDownWidth = 220; 
        
                    RcbFarAway.AutoPostBack = false; 
        
                    RcbFarAway.MarkFirstMatch = true; 
        
                    for (int i = 0; i < 5; i++) { 
        
                        RcbFarAway.Items.Add(new Telerik.Web.UI.RadComboBoxItem(i.ToString() + " Far far far far far away ...", i.ToString())); 
        
                    } 
        
                } 
        
            }

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 14 Nov 2010

3 answers

320 views

[Solved] CheckedChanged\Changing not firing

When I check my nodes, I get the events firing, but when I uncheck them nothing happens...and any additional click doesn't trigger an event....any idea why? :)

private void radTreeView1_NodeCheckedChanged(object sender, RadTreeViewEventArgs e) {

foreach (RadTreeNode n in e.Node.Nodes){

n.Checked = e.Node.Checked;

this.ChangeCheck(n.Nodes, e.Node.Checked);

}

//Check to see if this entire node is unchecked, then uncheck the parent

if (e.Node.Parent != null) {

//If none are checked

var checkCount = e.Node.Parent.Nodes.Count(x => x.Checked);

if (checkCount == 0) {

e.Node.Parent.Checked = false;

}else if (checkCount == e.Node.Parent.Nodes.Count()){ //If all are checked