The data validation rule should have values for formula1 and formula2 elements, which define the start and end values for a range to validate between. When such values are missing, a NullReferenceException is thrown on import and the document cannot be imported. As a workaround, the document can be modified by deleting the AlternateContent attribute.

I have loaded an excel file into the spreadsheet control from our document database. When a user makes changes and clicks the save button I would like to handle a save process back to our document database of the file.

If a save function can be raised I can save to the document database

If a SavAs fucntion can be raised I can prompt the user to create a new version

 

Can the control have these two features added please?

For some reason the last letters are dropping from headers and data.

If the lookup_value parameter and lookup_vector parameters refer cells containing text values, the function returns a Not available error ("#N/A").

To reproduce:
- Open the first look example. 
- Choose Save from the backstage button.
- Currently, the default is PDF, It should be xlsx.

If a worksheet spans more than one page, you can print row and column headings or labels (also called print titles) on every page to ensure that the data is properly labeled.

Hello,

 

So, I'm testing the Telerik suite, part of which is the RadSpreadSheet. I'm currently using the 30 days trial.

So, when I'm debugging it and I'm instantiating a new form that contains the RadSpreadSheet, the programme will about 50% of the time create an exception of object reference not set to an instance of an object
Now, I've only noticed this with forms that contain a radspreadsheet but it could have nothing to do with it.

What always happens before I get the exception is that the reminder to buy a Telerik License appears (the programme halts until I choose an option) and when the dialogue disappears, the exception happens.

 

Please note that if I just push "F5" again in VS, without changing anything anywhere, so after the crash immediately debug (F5) again, the exception will not occur.

Hello,

 

I have a RadRibbonForm with a normal ribbon with no items and a spreadsheet control.

 

I iterate over a datatable and fill the spreadsheet's cell values with the datatable's values

we're talking about a very small size, like 33 rows x 35 columns, and not even all the values are filled in.

 

Unfortunately, there's a very noticeable delay in the spreadsheet, from moving the scrollbars to selecting to changing sheets.. the whole thing feels laggy.

Is this just how it is, or am I experiencing a possible bug?

Could it have anything to do with https://feedback.telerik.com/winforms/1380948-exception-at-runtime-trial-bug ?

 

If that is just how it is, is there anything I can do to make it feel snappier? Disable a theme? Disable some behaviour?

To reproduce:
- Add a spreadsheet and add ribbon bar from the smart tag. 
- Start the application.

Workaround:
protected override void OnShown(EventArgs e)
{
    base.OnShown(e);
    var parameter = 11;
    this.radSpreadsheet1.SpreadsheetElement.CommandDescriptors.SetFontSize.Command.Execute(parameter);

    FontFamilyInfo parameter1 = new FontFamilyInfo(new System.Windows.Media.FontFamily("Calibri"));
    this.radSpreadsheet1.SpreadsheetElement.CommandDescriptors.SetFontFamily.Command.Execute(parameter1);
}

To reproduce: please refer to the attached gif file demonstrating how to replicate the problem with the Demo application. Scroll with the mouse wheel and you will notice the the row index disappears until you click a cell. Using the thumb will behave as expected. 

Workaround:
this.radSpreadsheet1.SpreadsheetElement.VerticalScrollBar.ValueChanged+=VerticalScrollBar_ValueChanged;
        private void VerticalScrollBar_ValueChanged(object sender, EventArgs e)
        {
            this.radSpreadsheet1.SpreadsheetElement.InvalidateMeasure(true);
        }

RadSpreadsheet must support printing using RadPrintDocument. 

Set the Print Area as described here: https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/features/worksheetpagesetup

This is possible in WPF

Workaround: create a custom input behavior class and manually handle the navigation when holding the Shift key
public partial class SpreadsheetForm : Telerik.WinControls.UI.RadForm
{
    public SpreadsheetForm()
    {
        InitializeComponent();

        FieldInfo behaviorFi = typeof(RadSpreadsheetElement).GetField("inputHandler", BindingFlags.Instance | BindingFlags.NonPublic);
        behaviorFi.SetValue(this.radSpreadsheet1.SpreadsheetElement, new CustomSpreadsheetInputBehavior(this.radSpreadsheet1.SpreadsheetElement));
    }
}

public class CustomSpreadsheetInputBehavior : SpreadsheetInputBehavior
{
    public CustomSpreadsheetInputBehavior(RadSpreadsheetElement element)
    : base(element) { }

    public override void ProcessKeyDown(KeyEventArgs e)
    {
        base.ProcessKeyDown(e);

        if (e.Shift)
        {
            switch (e.KeyCode)
            {
                case Keys.Left:
                    this.Spreadsheet.ActiveWorksheetEditor.Commands.UpdateActiveSelectionRangeCommand.Execute(MovementType.MoveToPreviousColumn);
                    break;
                case Keys.Up:
                    this.Spreadsheet.ActiveWorksheetEditor.Commands.UpdateActiveSelectionRangeCommand.Execute(MovementType.MoveToPreviousRow);
                    break;
                case Keys.Right:
                    this.Spreadsheet.ActiveWorksheetEditor.Commands.UpdateActiveSelectionRangeCommand.Execute(MovementType.MoveToNextColumn);
                    break;
                case Keys.Down:
                    this.Spreadsheet.ActiveWorksheetEditor.Commands.UpdateActiveSelectionRangeCommand.Execute(MovementType.MoveToNextRow);
                    break;
            }
        }
    }
}

The control can be resized in the designer.  The resize operation starts with a slight delay and it is necessary to wait for this initial delay. From then on the control can be freely resized. The attached gif file illustrates this.

Workaround:
1. Set the size using the property grid
2. Add a panel and dock the control to fill the panel, then resize the panel

Ideally we should expose the events in the RadPrintDocument object.

Workaround handling the PrintPreview method:
private void button1_Click(object sender, EventArgs e)
{
    RadPrintDocument printDocument = new RadPrintDocument();
    IPrintable printManager = typeof(RadSpreadsheetElement).GetProperty("PrintManager", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(this.radSpreadsheet1.SpreadsheetElement) as IPrintable;
    printDocument.AssociatedObject = printManager;

    printDocument.BeginPrint += PrintDocument_BeginPrint;
    printDocument.PrintPage += PrintDocument_PrintPage;
    printDocument.EndPrint += PrintDocument_EndPrint;
    printDocument.QueryPageSettings += PrintDocument_QueryPageSettings;
    SpreadsheetPrintPreviewDialog printPreviewDialog = new SpreadsheetPrintPreviewDialog(printDocument);
    printPreviewDialog.ThemeName = this.radSpreadsheet1.ThemeName;
    printPreviewDialog.ShowDialog();
}

private void PrintDocument_QueryPageSettings(object sender, System.Drawing.Printing.QueryPageSettingsEventArgs e)
{
    
}

private void PrintDocument_EndPrint(object sender, System.Drawing.Printing.PrintEventArgs e)
{
    
}

private void PrintDocument_BeginPrint(object sender, System.Drawing.Printing.PrintEventArgs e)
{
    
}

private void PrintDocument_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
}