# Using Validation Use Spread.NET to develop front-ends to database applications. It gives access to multiple sheets using many types of cells and predefined sheet styles. ## Content You can validate the contents of the cell in a number of ways. The following topics describe about how to validate the input from a user. * [Using Validation in Cells](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation) * [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 a Value Comparison Validator](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation/spwin-cellcomparevalue) * [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) * [Validating User Input](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-datavalidate) * [Customizing the User Error Messages](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cntrlmessages) * [Displaying Error Icons in Cells or Rows](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cell-error) You can validate the data in a cell using the cell validation. For more information, refer to [Using Validation in Cells](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-cellvalidation). You can also combine cell types and events to validate the data in a cell. For more information, refer to [Validating User Input](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cellvalid/spwin-datavalidate). ## See Also [Customizing Interaction in Cells](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell) [Using Edit Mode and Focus](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cell-focus) [Customizing User Selection and Deselection of Data](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-interactselection) [Using Drag Operations to Fill Cells](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cell-dragops) [Using Visible Indicators in the Cell](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cell-indicators) [Customizing Undo and Redo Actions](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-undoredo) [Customizing Interaction Based on Events](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cntrlevents) [Adding Custom Context Menu to a Component](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cntrlcontextmenu) [Using Double Click to Fill Cells](/spreadnet/docs/latest/online-win/overview/spwin-devguide/spwin-interactcell/spwin-cell-clicktofill)