# Using a Value Comparison Validator

Learn how to create a value comparison validator in Spread.NET to compare cell values and display a notification if the value is invalid.

## Content

You can create a validator that compares a cell value to other values. You can compare DateTime, TimeSpan, or Decimal type (Numeric) values.
A validation error occurs if the value is not valid. You can also create an action, such as adding a text tip to the cell, that lets the user know the value is invalid.
Use the **CompareValueValidator** class to create the validator. Specify a notification type such as [TipNotify](/spreadnet/api/latest/online-win/FarPoint.Win.Spread/FarPoint.Win.Spread.TipNotify.html). Then use the [AddValidators](/spreadnet/api/latest/online-win/FarPoint.Win.Spread/FarPoint.Win.Spread.SheetView.AddValidators.html) method to add the validator to a cell range.
The following image displays the tip notification for an invalid value.
![Spreadsheet displaying a validation error for showing an invalid value](https://cdn.mescius.io/document-site-files/images/2238e618-a1fb-45a6-9ce5-9a4157bd2931/images/comparevalue.png)

## Using Code

The following example displays an icon if you type a value less than 5.

```csharp
//Type a value in cell 1,1
FarPoint.Win.Spread.TipNotify tnote = new FarPoint.Win.Spread.TipNotify();
tnote.ToolTipText = "Greater than 5";
tnote.ToolTipTitle = "Error";
tnote.ToolTipIcon = ToolTipIcon.Error;
FarPoint.Win.Spread.CompareValueValidator compare = new FarPoint.Win.Spread.CompareValueValidator();
compare.ComparedOperator = FarPoint.Win.Spread.ValidateComparisonOperator.GreaterThan;
compare.ComparedValue = 5;
compare.Actions.Add(tnote);
fpSpread1.Sheets[0].AddValidators(new FarPoint.Win.Spread.Model.CellRange(1, 1, 1, 1), compare);
```

```vbnet
'Type a value in cell 1,1
Dim tnote As New FarPoint.Win.Spread.TipNotify()
tnote.ToolTipText = "Greater than 5"
tnote.ToolTipTitle = "Error"
tnote.ToolTipIcon = ToolTipIcon.Error
Dim compare As New FarPoint.Win.Spread.CompareValueValidator()
compare.ComparedOperator = FarPoint.Win.Spread.ValidateComparisonOperator.GreaterThan
compare.ComparedValue = 5
compare.Actions.Add(tnote)
fpSpread1.Sheets(0).AddValidators(New FarPoint.Win.Spread.Model.CellRange(1, 1, 1, 1), compare)
```

## See Also

[Using a Cell Comparison Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellcomparevalidator)
[Using a Character Format Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellcharformatv)
[Using a String Comparison Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellcomparestring)
[Using an Encoding Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellencodingvalid)
[Using the Exclude List Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellexcludevalidator)
[Using the Include List Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellincludevalidate)
[Using a Pair Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellpairvalidate)
[Using the Range Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellrangevalidator)
[Using a Regular Expression Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellregexpression)
[Using a Required Field Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellrequiredvalid)
[Using a Required Type Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellrequiretypev)
[Using a Surrogate Character Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellsurrogate)
[Using a Text Length Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-celltextlvalid)