Hi,

   I tried Telerik Radgridview Grouping using example in docs.telerik.com/devtools/winforms/controls/gridview/grouping/setting-groups-programmatically. But when ever i tried to group its showing Object not set to instance of  an Object error.

My input data looks like this

My Group descriptor code looks like this

My Error looks like this

I am not sure why i am getting this error. I just wanted to group the data by DevelopmentPart.

And also if you have any small sample project for gridview can you provide?

Regards

Harsha

Hello,

I am a freelancer residing in Germany and the sole developer of a small application which is usable for (automated) Windows setup. Looking around for a nice and slick design I stumbled over the Telerik Winforms controls. But after checking your 500 pages EULA I am confused about your licensing policy and would like to know what exactly I would need in order to be legally allowed to use your Telerik Winforms components (esp. RadForm, RadPanel, RadButton, RadCheckbox, RadLabel, RadTextbox, RadTextControl, RadDropDownList, RadMultiColumnComboBox, RadGridView - all including a customized Fluent Dark design theme) within my own application which I want to sell to potentially customers globally - and hereby I want to avoid possible copyright infringements, of course.

I already know that I need to use ILMerge to hide the used Telerik .dll files within the released application but I do not know which or if any license is needed, at all, as the .dlls theirselves can be used without any license keys as you have mentioned on various articles/forum posts. Furthermore and as mentioned, it is only a small tool and I do not intend to modify the Telerik .dlls in any way.

Thanks a lot in advance and kind regards!

I can't seem to get the back color of a cell, row or column to set programatically.

The ribbon lets me choose a back (fill) color, but nothing happens. 

I can find the 'setForeColor' method, but there isn't a 'setBackColor'. Can you confirm that this is right ?

I CAN set back colors using the Styles = good/bad/neutral from the UI.

So is the only way to set the back color to create my own CellStyle, and use that?

Is there any documentation on how to do this? Using the Visual Studio debugger makes it a very slow process of software archeology!

HI Support,

I would like to know drag and drop to gridivew from attached file of forward outlook email. Now I got error. Can't read file stream. I can read file stream normal attached file (pdf or excel).

Thanks,

Moe

I need help with the performance of the SortDescriptors for the RadGridview. I attached a project that demonstrates the issue.

I have two sets of data. The "Larger Data Table" has roughly twice as many rows (around 17k). The "Smaller Data Table" has around 9k rows.

• Setting the Sort Descriptors toggle switch ON, selecting the "Larger Data Table" radio button, and clicking the [Load Data Set] button takes approximately 1 second in my environment.
• Setting the Sort Descriptors toggle switch ON, selecting the "Smaller Data Table" radio button, and clicking the [Load Data Set] button takes approximately 7 seconds in my environment.

I have no idea what is causing this issue. However, through a ton of troubleshooting, I finally figured out it is the sort descriptors causing the issue.

你好，

我们下载了teleririkv2022R1版本，想从winForm自动转换到.net core，但是发现最新版本网上没有介绍.NET Core Project Converter？是什么原因？

最好的祝福，

星宇

Hi there,

I´m switching for radgridview to radvirtualgrid but i´m having some problems in keeping some of the funcionalities i previously had.  

1)  Conditional Formatting is possible in virtual grid?

2) Enable grouping (https://docs.telerik.com/devtools/winforms/controls/gridview/grouping/setting-groups-programmatically) is also another funcionality that i would like to keep in my virtual grid but i can´t find anything online related to it.

Thanks in advance.

Hi,

I'm using what you recommand to dragdrop between two gridview.

RowDragHint doesn"t show up when dragging from a gridview to another. Is there anything I can do, with a custom dragDropBehavior to change the way the previewDrop is rendered.

Expected Drop Preview

Here's what I would like to display when I hover the right gridview

What's truly happening... sadly 😅

There is no rowhint when hovering the gridview

The documentation I used:

https://docs.telerik.com/devtools/winforms/controls/gridview/rows/drag-and-drop

Thanks in advance.

Best regards

Hello.

I'm leaving you a question because I need your help.

Is there a way to run multiple windows of the same menu? Just like below.

* Menu Example

--------------------------------------------------------------------------------

A MENU    |    B MENU    |    C MENU

--------------------------------------------------------------------------------

B Sub Menu    |     B Sub Menu    |    B Sub Menu

--------------------------------------------------------------------------------

Code for generating the menu currently in use.

* CODE

var menuList = MenuList.List.Where(x => x.DISPLAY_FLAG.Equals("Y"));
                foreach (FT_MENU_INFO menu in menuList)
                {
                    if (string.IsNullOrWhiteSpace(menu.PARENT_MENU_CD) 
                        || menu.MENU_CODE.Equals(menu.PARENT_MENU_CD))
                    {
                        var item = new RadMenuItem { Text = menu.MENU_NAME };
                        item.Padding = new Padding(0, 0, 3, 0);
                        item.ClickMode = ClickMode.Press;
                        item.ShowArrow = false;
                        item.Visibility = ElementVisibility.Visible;

                        var subMenuItem = menuList.Where(x => x.PARENT_MENU_CD != null && x.PARENT_MENU_CD.Equals(menu.MENU_CODE)).ToArray();
                        for (int i = 0; i < subMenuItem.Length; i++)
                        {
                            RadMenuItem subMenu = new RadMenuItem()
                            {
                                Text = subMenuItem[i].MENU_NAME,
                                Name = subMenuItem[i].MENU_CODE
                            };

                            subMenu.Click += Menu_Click;
                            item.Items.Add(subMenu);
                        }

                        this.radMenu.Items.Add(item);
                    }
                }