Repro-steps:

1. Create a RadGridView
2. MultiSelect = true
3. SelectionMode = CellSelect
4. Fill it with lots of cells (in my case: 7 columns, 8544 rows)
5. Press CTRL-A
6. Press Delete

Expected behavior:

• All rows are gone

Observed behavior:

• 50/50 change that some rows remain.

I traced the problem back to the method GridViewSleectedCellsCollection.IsSelected / GetHashCodeString.

internal bool IsSelected(GridViewRowInfo row, GridViewColumn column) => row != null && column is GridViewDataColumn && this.hashtable.Contains((object) this.GetHashCodeString(row, column));

When a cell is selected with GridViewCellInfo.IsSelected = true, it checks if it has already been selected. It does so by calling GridViewSleectedCellsCollection.IsSelected. which checks if a HasCodeString is already in a hashtable. But, when another selected cell has the same HasCodeString, the result is (incorrectly) true, which will result in not added it to the collection of selected cells. 

I guess that is can be easily fixed by changing:

 private string GetHashCodeString(GridViewRowInfo row, GridViewColumn column)
    {
      int hashCode = row.GetHashCode();
      string str1 = hashCode.ToString();
      hashCode = column.GetHashCode();
      string str2 = hashCode.ToString();
      return str1 + str2;
    }

to:

 private string GetHashCodeString(GridViewRowInfo row, GridViewColumn column)
    {
      int hashCode = row.GetHashCode();
      string str1 = hashCode.ToString();
      hashCode = column.GetHashCode();
      string str2 = hashCode.ToString();
      return str1 + "_" + str2;
    }

Since hashcodes 1 + 23 will result in the same string as hashcodes 12 + 3.

Making this change will reduce the problem significantly, but not entirely since hashCodes will never be unique.

I am rewriting the RadGridViewPaste-mechanism. Therefor I want to call PastingCellClipboardContent-event using the EventDispatcher.CellClipboardPaste. therefor I need the class GridViewCellValueEventArgs. It has two constructors:

1. A constructor with indexes. If this one is used, properties RowInfo and Column will always be null.
2. A constructor which accepts a row and column as parameters. All properties are set and usable.

The second constructor is marked as Internal, not Public. 

Request: Can this constructor be made Public?

I have made an override for class GridViewDataRowInfo (called GridViewDataRowInfoPlus)

Every time a new row is created by RadGridView, I expect OnCreateRowInfo to be called, so I can return my own instance of GridViewDataRowInfoPlus.

This goes well until a user enters new data in a new row and when this row is added the grid, OnCreateRowInfo is not being called and an instance of GridViewDataRowInfo is added to the grid.

For me that is unexpected and undesirable. Maybe I am doing it wrong. In that case: What is the correct way to intercept the row-creation-process and return instances of my own type?

Repro steps:

1. Make a datatable with a string-column with a max. length of 10 characters.
2. Add a row with a string of max. 10 characters.
3. Bind it to a RadGridView
4. Add an event-handler to DataError which will cancel the action if a data error occurs.
5. In the UI, enter data into the cell. Make it longer than 10 characters.

Expected behavior:

1. The same behavior as CellValidating.
2. De user stays inside the editor so it can modify the text.

Observed behavior:

1. The editor is closed, the new text is not displayed.

Use the attached sample project.

Sceen 1 (Screen with program shortcuts) on the right in the gif: this screen has display scale 125%

Screen 2 (Screen with the Form) on the left in the gif: this screen has display scale 100%

When all three toolwindows are placed in the forms, there is no issue. The Dropdown list of ToolWindow1 (floating, dockable..) when opened is placed correctly.

If I moved the ToolWindow3 from Screen2 to Screen1 and make it the most recent active window (by clicking on it), I go back to the Screen2 and open the dropdown list of Toolwindow1, this list's position is now wrong and the text size bigger. This is because it takes the display scale (125%) of  the screen where the most recent active toolwindow (ToolWindow3 ) is.

If I popup the ToolWindow2, place it in Screen2 (the same screen with ToolWindow1), make ToolWindow2 the most recent active window, and open the dropdown list of Toolwindow1, this list's position is now correct and the text size normal. This is because it takes the display scale (100%)  of  the screen where the most recent active toolwindow (ToolWindow2 ) is.

Workaround: add app.manifest file and declare the application as DPI aware: 

Report steps:

1. Make a datatable with a string-column with a max. length of 10 characters.
2. Will the datatable with some data.
3. Bind it to a RadGridView
4. In Excel (or another applicatie) create a now table with some strings, this time longer that 10 characters.
5. Paste this data from Excel to the RadGridView

Expected behavior:

1. The strings that are to long will either cause an exception or they are truncated.

Observed behavior:

1. The string with the value that is to long is skipped during pasting.

Extra detail:

In the method MasterGridViewTemplate.PasteDataToRow the next piece is code is located:

if (CurrentView.ViewTemplate.Columns[columnIndex].DataType == typeof(string))
{
    if (column is GridViewTextBoxColumn viewTextBoxColumn && viewTextBoxColumn.MaxLength > 0 && rowData[rowIndex].Length > viewTextBoxColumn.MaxLength)
        obj = rowData[rowIndex].Substring(0, viewTextBoxColumn.MaxLength);
}

Reproduction steps:

• Create a new RadPropertyGrid
• Add an instance of a class with at least one property of type Nullable<int>.
• The property does not have an DefaultValueAttribute.
• Make sure that property has the value null.
• In de UI, the field appears to be empty.
• In de UI, click on the field to edit it.

Observed behavior:

• An edit-box appears with the value zero (0).
• Leaving this field (without entering any digits) sets the property with that 0, which is undesirable.

Expected behavior:

• An empty edit-box appears, without any digits.
• Leaving this field (without entering any digits) should keep the property null.
  

When I create a new form-class, which derives from RadFrom, and I override the method OnLoad, then OnLoad is called during construction. This should never happen!

As Microsoft states: "The OnLoad method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class."

See: https://docs.microsoft.com/en-us/dotnet/api/system.windows.forms.form.onload?view=windowsdesktop-6.0 

The OnLoad method can be used to load controls with data. But these controls are not even initialized, because the method InitializeComponent has not been called yet.

Hi,

An HTTP Request returns me an error in HTML format. Please see img001. This image was capture in debug mode in Visual Studio.

When I want to show a MessageBox or a Label with this HTML, appears like in img002.

Thank you!

The HTML text is:

Please run the attached sample project, open the drop down and press the down arrow key.

Observed: application hangs

Expected: since all menu items in the drop down are disabled, nothing is expected to happen. However, the application shouldn't hangs.

Workaround:

public class CustomRadDropDownButtonElement : RadDropDownButtonElement
{
    protected override Type ThemeEffectiveType
    {
        get
        {
            return typeof(RadDropDownButtonElement);
        }
    }
    protected override RadDropDownButtonPopup CreateDropDown()
    {
        return new CustomDropDown(this);
    }
}

public class CustomDropDown : RadDropDownButtonPopup
{
    public CustomDropDown(RadElement ownerElement) : base(ownerElement)
    {
    }

    protected override void EnsureItemEnabled(RadItem item, bool isUp)
    {
        do
        {
            item = this.GetNextItem(item, !isUp);
            if (item == this.Items.Last())
            {
                break;
            }

        } while (!item.Enabled);
        if (item != null)
        {

            this.SelectItem(item);
        }
    }
}

Use a custom font set like this: 

this.radSyntaxEditor1.SyntaxEditorElement.EditorFontFamily = new Telerik.WinControls.SyntaxEditor.UI.FontFamily("Cascadia Code");
this.radSyntaxEditor1.SyntaxEditorElement.EditorFontSize = 13;

Then load a large document, at least 10K lines so that the clipping is visible.

• I'm using Visual Studio 2022 Community. Running as Admin.
• I've installed the latest Winforms (Telerik_UI_For_WinForms_2022_1_222_Dev.msi)
• I open Visual Studio and select to create a Word-like project.
• The files are all created
• One nuget reference is present under Dependencies/Packages, but shows as unresolved (UI.for.WinForms.AllControls.Net60 (2022.1.222.0))
• Using the NuGet Package Manager, there is no Telerik package source present.

So, at this point this seems to be a possible bug. The template project did not setup correctly. I have literally done nothing other than download and install Telerik WinForms today and then try to create this project. This _should_ work or give me instructions of further setup that I have to do manually.

I did try a couple other things, but also failed to get things working.

• I tried to setup the Telerik Package Source as https://nuget.telerik.com/v3/index.json
• I was able to see various WinForms packages in the Package Manager, includes the one registered in the project. But VS won't update the project to resolve the package.
  
• I uninstalled the nuget package to try reinstalling it, but the re-install failed with the following messages

Restoring packages for C:\DevGit\pws\pws.core\pws.core\pws.core.csproj...
  GET https://nuget.telerik.com/v3/package/ui.for.winforms.allcontrols.net60/index.json
  GET https://nuget.org/FindPackagesById()?id='UI.for.WinForms.AllControls.Net60'&semVerLevel=2.0.0
  OK https://nuget.telerik.com/v3/package/ui.for.winforms.allcontrols.net60/index.json 90ms
  GET https://nuget.telerik.com/v3/package/ui.for.winforms.allcontrols.net60/2022.1.222/ui.for.winforms.allcontrols.net60.2022.1.222.nupkg
  NotFound https://nuget.org/FindPackagesById()?id='UI.for.WinForms.AllControls.Net60'&semVerLevel=2.0.0 147ms
  GET https://nuget.org/FindPackagesById()?id='UI.for.WinForms.AllControls.Net60'&semVerLevel=2.0.0
  NotFound https://nuget.org/FindPackagesById()?id='UI.for.WinForms.AllControls.Net60'&semVerLevel=2.0.0 42ms
  GET https://nuget.org/FindPackagesById()?id='UI.for.WinForms.AllControls.Net60'&semVerLevel=2.0.0
  NotFound https://nuget.org/FindPackagesById()?id='UI.for.WinForms.AllControls.Net60'&semVerLevel=2.0.0 40ms
  OK https://nuget.telerik.com/v3/package/ui.for.winforms.allcontrols.net60/2022.1.222/ui.for.winforms.allcontrols.net60.2022.1.222.nupkg 235ms
  GET https://nuget.telerik.com/v3/package/system.management/index.json
  GET https://nuget.org/FindPackagesById()?id='System.Management'&semVerLevel=2.0.0

....

followed by many more "NotFound" messages.

Setting the SyntaxEditorElement.HorizontalScrollBar.Visibility property to Collapsed indeed hides the horizontal scrollbar but it is still measured and arranged and overlaps the view if you shrink the view: