Spread Windows Forms 12.0 Product Documentation
Using a Regular Expression Validator
Spread Windows Forms 12.0 Product Documentation > Developer's Guide > Customizing Interaction in Cells > Using Validation in Cells > Using a Regular Expression Validator

You can create a regular expression validator that checks to see if a cell's value matches the specified regular expression.

A validation error occurs if the value is not valid. You can also create an action, such as adding a backcolor to the cell, that lets the user know the value is invalid.

Use the RegularExpressionValidator class to create the validator. Specify a notification type such as CellStyleNotify. Then use the AddValidators method to add the validator to a cell range.

Using Code

The following example displays the invalid color if the value does not match the expression.

Copy Code
//The error backcolor is displayed if the value is invalid
FarPoint.Win.Spread.CellStyleNotify cnotify = new FarPoint.Win.Spread.CellStyleNotify();
cnotify.InvalidCellStyle.BackColor = Color.Lime;
FarPoint.Win.Spread.RegularExpressionValidator rvalidator = new FarPoint.Win.Spread.RegularExpressionValidator();
rvalidator.Expression = "AA";
rvalidator.RegexOptions = System.Text.RegularExpressions.RegexOptions.IgnoreCase;
rvalidator.NullIsValid = true;
fpSpread1.Sheets[0].AddValidators(new FarPoint.Win.Spread.Model.CellRange(1, 1, 1, 1), rvalidator);
Copy Code
'The error backcolor is displayed if the value is invalid
Dim cnotify As New FarPoint.Win.Spread.CellStyleNotify()
cnotify.InvalidCellStyle.BackColor = Color.Lime
Dim rvalidator As New FarPoint.Win.Spread.RegularExpressionValidator()
rvalidator.Expression = "AA"
rvalidator.RegexOptions = System.Text.RegularExpressions.RegexOptions.IgnoreCase
rvalidator.NullIsValid = True
fpSpread1.Sheets(0).AddValidators(New FarPoint.Win.Spread.Model.CellRange(1, 1, 1, 1), rvalidator)