Helo, i'll go straight to the point

************** ERROR START **************

See the end of this message for details on invoking 

just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************

System.InvalidOperationException: Collection was modified; enumeration operation may not execute.

  at System.Collections.ArrayList.ArrayListEnumeratorSimple.MoveNext()

  at Telerik.WinControls.ComponentInputBehavior.ElementUnderMouseMonitorTimer_Tick(Object sender, EventArgs e)

  at System.Windows.Forms.Timer.OnTick(EventArgs e)

  at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)

  at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

************** ERROR END **************

I get the error when i subscribe to the event 'GraphicalViewItemFormatting'.

Example: THIS-OBJECT:radGanttView1:GraphicalViewItemFormatting:Subscribe(THIS-OBJECT:radGanttView1_GraphicalViewItemFormatting).

I can replicate the error by moving the mouse really fast (from the text element to the graphic element over and over again). If i unsubscribe then everything works just fine. This error is faster to replicate if there's more objects in the RadGanttView in question.

This error doesn't seem to exist anywhere BUT in Progress. I had this problem with the "RadGridView" but i managed to go around it. Something i wasn't able to do in this object.

My goal is to change the items/tasks colors but aparently that isn't something that can be done OUTSIDE of an event...

I talked to my colleagues and the ones with years of experience said it's probably on the DLL side. They said a 'Collection' is being modified at the wrong time and it's not in my control. 

Does anyone know how to go around this? How I may change the items colors without using this event? Maybe a way to disable highlights and animations on the object to prevent said 'Collection' from being modified?

Thank you.

JP

Update1: Aparently this also happens to the 'TextViewItemFormatting' event. If i comment both subscribes everything goes perfect.

I am using the RadMaskedEditBox to limit the user input. I need to allow the user to enter values from 0.0 to 999.9.  I was using a MaskType of Standard with a Mask of 999.9 or ###.#...however, this is forcing the user to enter numbers that are < 100 as 099.0. The users down't want to enter 0 for any value below 100, this is a real pain for them. so, I switched it to using a MaskType of Numeric and setting the Mask to N1, but this has its own problem of allowing the user to enter 9999999.9, which when saved, thows an error (the underline field is only 5 characters).  Since there is no MaxLenth field on this control, I need a better method.   I looked at using REGEX as the masktype, but, to this date, I still struggle with REGEX EXPRESSIONS and how to create an REGEX Expression to make this work.  Anyone help me out here. 

Thanks.

Hello All,

     I'm working on an active directory project where the RadTreeView requires it's nodes to have images according to the nodes respective containers (I.E. User Accounts will have an user icon). I have posted some code relating to my issue. I hope someone here can shed some light on this and tell me what it is I'm doing wrong.

To be clear on this, the nodes show active directory binded data but not the images. Thank you in advance.

        public void subEnumerateChildren(RadTreeNode oRootNode)
        {
            DirectoryEntry deParent = new DirectoryEntry("LDAP://RootDSE");


            foreach (DirectoryEntry deChild in deParent.Children)
            {
                RadTreeNode oChildNode = oRootNode.Nodes.Add(deChild.Path);
                switch (deChild.SchemaClassName)
                {
                    case "computer":
                        oChildNode.ImageIndex = 6;
                        break;
                    case "user":
                        oChildNode.ImageIndex = 7;
                        break;
                    case "group":
                        oChildNode.ImageIndex = 8;
                        break;
                    case "organizationalUnit":
                        oChildNode.ImageIndex = 3;
                        break;
                    case "container":
                        oChildNode.ImageIndex = 1;
                        break;
                    case "publicFolder":
                        oChildNode.ImageIndex = 5;
                        break;
                    default:
                        oChildNode.ImageIndex = 1;
                        break;
                }

                oChildNode.Tag = deChild;
                oChildNode.Text = deChild.Name.Substring(3).Replace("\\", "");

            }
        }

Hello everyone, I want to turn off the hidden function of the ribbonTab drop-down interface after double-clicking the mouse in Telerik's radRibbonBar control. How can I change it? I rewrote the double-click event of the ribbonTab and found that it has no effect. After double-clicking the ribbonTab, it will still be hidden. Thank you.

        private void radRibbonBar1_Load(object sender, EventArgs e)
        {
            foreach (var tab in radRibbonBar1.CommandTabs)
            {
                tab.DoubleClick += new EventHandler(ribbonTab_DoubleClick);
            }
        }

        private void ribbonTab_DoubleClick(object sender, EventArgs e)
        {
            // do nothing
        }

I want to show placeholder text in GridViewComboBox column.

below Select... and All is placeholder. How I can do this with GridViewComboBox Column.

Hi,
I have one custom control named FDTSelectBox.
I want to use this inside grid.

I have been already gone through the documentation of custom cell but not able to implement that.

Because in order to use FDTSelectBox Inside grid I need to inherit that from GridDataCellElement class.

But my problem is that my custom control FDTSelectBox is already inheriting from UserControlClass which system provided class and it is tightly coupled with that. and you know in C# we cannot inherit from 2 classes multiple inheritance not supported.

below is my custom control structure

public class FDTSelectBox : UserControl, IFDBControl

{

  //some code.....

}

Please suggest if there is some way so that I can put this control inside cell of grid.

Please Help!!

Thanks,
Shubham Jain

Hi,

I need a help that how I can show column in a grid header when I am grouping my data with that particular column. I need to show column as well in a grid header after grouping.


I have attested 2 Images one with Current and one with Required tag.
By looking that images my problem will be clear to you.

Hope my requirement is clear to you.

Please help me.

Hi ,

As user puts more more column for grouping i need to increase height of GroupPanelElement so that it can show all column which are used in grouping without scrolling.
Also, Want to decrease size if user remove column from grouping.

Thanks,
Shubham Jain

Hello,

We are using the Numpad version of your RadVirtualKeyboardForm and did some modifications on the layout which worked absolutely fine so far. The only thing we would still like to do is to make each key bigger because we use it on a touch screen and the standard key size appears to be too small for certain of our users.

We are using an XML file in order to load the keyboard layout and I tried to change the KeyWidth and KeyHeight in the XML file which works fine. But the layout becomes messy as the window of the keyboard only seems to grow horizontally but not vertically as seen in the screenshot. Is there a possibility to indicate the window's size somewhere?

Thank you in advance and have a nice day!