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UI for WinForms Forum
1 answer
2 views


using System.Windows.Forms;

namespace testGridViewKeyPress
{
    public partial class RadForm2 : Telerik.WinControls.UI.RadForm
    {
        private int count_;
        public RadForm2()
        {
            InitializeComponent();

            count_ = 0;
        }

        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            count_++;
            radLabel1.Text = count_.ToString();

            radGridView2.BeginUpdate();
            radGridView2.Rows.Clear();
            //I Want to Process Row Clear And Add
            radGridView2.EndUpdate();

            return true;
        }
    }
}

 


When I hold down the key, I want to clear the row of the GridView and add a new row.

However, when the number of columns increases, even if rows work is performed between BeingUpdate() and EndUpdate(),

All UI is not highlighted or updated.

If the control needs processing when in the press state like this, shouldn't I use gridview?

Or, if there is another solution, please let me know.

+What I want is for all UI to update and operate when a key is pressed.

+My telerik version 2021.3.914.40(Dev)

 

Dinko | Tech Support Engineer
Telerik team
 answered on 28 Mar 2024
1 answer
2 views

 

Hello,

I've created a custom cell in a radgridview so that I can in one column either display a RadDropDownListElement or a RadTextBoxControlElement depending on if the tag of the row has a datatable or not. If it has a datatable it will show the dropdown, otherwise it shows the textbox.

This I've done pretty much according to this tutorial.

https://docs.telerik.com/devtools/winforms/controls/gridview/cells/creating-custom-cells#custom-group-cell-example

 

However, my problem is that the selected index changed event on the dropdown is triggered too early, i.e. before all data has been loaded. Is there a way to get around this? I would like that the selected index changed event only kicked in if all the data of the form has been loaded. This I usually achieve by checking if a flag, e.g. 'IsInitiated', is true in the  beginning of the Sub. But cannot seem to reach such a flag from the custom cell class.

 

Nadya | Tech Support Engineer
Telerik team
 answered on 28 Mar 2024
5 answers
13 views

Hello,

I would like to ask for help with designing parameter editor with subitems. I have editor of test items, each item has some parameters and tolerances (Min, Max). Standard tests have just main tolerances, but some tests have also subitems. More precisely, if test has subitems, only subitems have tolerances, main tolerances are not used. Columns for items and subitems are almost the same, items have parameters and subitems don't have any parameters, but there is just a name of subitem instead of test type of parent item. So first attempt of editor looks like this:

One small question to this solution, how can I show "+" only if there are some subitems?

But I am not satisfied with that design, subitems have own border, own column headers, it's little bit confusing and not very clear. I know it's standard way of master-detail views, but in this case, I would prefer design similar to self referencing hierarchy, because columns are almost the same, just some cells are empty and I have name of subitem name instead of test type.

I have made a second test with selfrefencing and changed the screenshot a little bit to show you what I am trying to achieve. Is it possible to have view similar to this?

I think I can do it with some modified data structures specialized for editor, I can use nullable properties for tolerances and parameters to hide certain cells, handle some events to have those empty cells readonly, maybe it would be tricky to show indented subitem name in test type combo box column, but I think this solution would be a little bit ugly. Is there any better way to do this?

I have attached my test project for tests.

Nadya | Tech Support Engineer
Telerik team
 answered on 26 Mar 2024
2 answers
8 views

Hi!

When using CopyingCellClipboardContent the event is fired x3 times in each cell (once for each supported format). So if I have selected 5 cells the copy will trigger the event 15 times. Is there any kind of event for multiple copies?

Nadya | Tech Support Engineer
Telerik team
 answered on 26 Mar 2024
1 answer
4 views

Hi,

My team is trying to make an update from WinForms 2015.1.331 to the Latest 2024 Q1 Update 2024.1.130. Asked me for the comparison RadGridView component features until 2015 Q1 version(current) vs the rest of improvements/features from current to 2024 Q1 version. Is there a better way to get this comparision without scrolling through all releases and noting down the features and manually analyzing?

Nadya | Tech Support Engineer
Telerik team
 answered on 25 Mar 2024
1 answer
10 views

the data has been bind to radgirdview ,how to set the rowspan at runtime ? because must use set DataSource method to render data ,so cann't render the gridview cell by cell.

Dinko | Tech Support Engineer
Telerik team
 answered on 20 Mar 2024
0 answers
9 views

Is there a way to detect when the user clicks on the column header to sort.

An event like SortStarted and SortFinished?

I'd like to capture that event to perform some special processing.

Martin Hamilton
Top achievements
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Veteran
 asked on 14 Mar 2024
1 answer
15 views

Hi,

 

I used to do custom cells by adding controls through "createChildElements" methods, but it was really slow when having multiple columns and row displayed.

So I tried to use graphics only and I did everything in "PaintContent" methods. This is way faster, very smooth, but I sometimes have an error (very randomly) on bounds object (of radshaped form) being lock by another thread.

I wanted to know if this workaround for painting cells approved or not?

If not what/where would you recommand to do this?

Thanks in advance!

 

Simon

 

Dinko | Tech Support Engineer
Telerik team
 answered on 14 Mar 2024
1 answer
11 views

I am using an old version of RadGridView and from what I see the property EnableHeaderCheckBox properties not exist.

If there are any properties in an older version that I can use to implement select all by selecting column header.

Nadya | Tech Support Engineer
Telerik team
 answered on 14 Mar 2024
1 answer
9 views

Hi all,

How do you modify (or prevent) the display default "no data to display" text in when no line or column is yet set up ?

All forum answers are very old an do not work anymore, nor gridview.ShowNoDataText = false;

Thanks

Patrick

Nadya | Tech Support Engineer
Telerik team
 answered on 13 Mar 2024
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