Documentation(992532): FAQ for how to handle excel formulas stored as strings using cell type validation

Document-Processing-toc.html

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 										<a href="/document-processing/excel/excel-library/net/faqs/how-to-get-the-rgb-color-value-for-the-applied-cell-color">How to get the RGB color value for the applied cell color?</a>
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+										<a href="/document-processing/excel/excel-library/net/faqs/how-to-restore-formulas-stored-as-text-in-excel-documents">How to restore formulas stored as text in Excel documents?</a>
+									</li>
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 										<a href="/document-processing/excel/excel-library/net/faqs/how-to-save-the-edited-chages-in-the-same-excel-document">How to save the edited changes in the same Excel document?</a>
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Document-Processing/Excel/Excel-Library/NET/faqs/how-to-restore-formulas-stored-as-text-in-excel-documents.md

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+---
+title: Restore Excel formulas stored as text | Syncfusion
+description: Code example to restore Excel formulas stored as text in Excel documents using Syncfusion .NET Excel library (XlsIO).
+platform: document-processing
+control: XlsIO
+documentation: UG
+---
+
+# How to restore formulas stored as text in Excel documents?
+
+The following code examples demonstrate how to handle Excel formulas stored as strings using cell type validation using C# (Cross-platform and Windows-specific) and VB.NET.
+
+{% tabs %}   
+{% highlight c# tabtitle="C# [Cross-platform]" playgroundButtonLink="https://raw.githubusercontent.com/SyncfusionExamples/XlsIO-Examples/master/FAQ/Formula%20stored%20as%20text%20handling/.NET/FormulaStoredAsTextHandling/FormulaStoredAsTextHandling/Program.cs,180" %}
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    IApplication application = excelEngine.Excel;
+    application.DefaultVersion = ExcelVersion.Xlsx;
+
+    //Create a new workbook with one worksheet
+    IWorkbook workbook = application.Workbooks.Create(1);
+    IWorksheet worksheet = workbook.Worksheets[0];
+
+    //Assign a formula as text to the cell
+    worksheet["A1"].Text = "=SUM(2+2)";
+
+    //Get the cell type of the cell
+    Syncfusion.XlsIO.Implementation.WorksheetImpl.TRangeValueType cellType =
+        (worksheet as WorksheetImpl).GetCellType(1, 1, false);
+
+    //Check if the cell type is string
+    if (cellType == TRangeValueType.String)
+    {
+        //Retrieve the formula text
+        string formulaText = worksheet["A1"].Text;
+
+        //Clear the cell value
+        worksheet["A1"].Value = string.Empty;
+
+        //Reassign the formula to the cell
+        worksheet["A1"].Formula = formulaText;
+    }
+
+    //Save the workbook
+    workbook.SaveAs(Path.GetFullPath(@"Output/Output.xlsx"));
+}
+{% endhighlight %}
+
+{% highlight c# tabtitle="C# [Windows-specific]" %} 
+using (ExcelEngine excelEngine = new ExcelEngine())
+{
+    IApplication application = excelEngine.Excel;
+    application.DefaultVersion = ExcelVersion.Xlsx;
+
+    //Create a new workbook with one worksheet
+    IWorkbook workbook = application.Workbooks.Create(1);
+    IWorksheet worksheet = workbook.Worksheets[0];
+
+    //Assign a formula as text to the cell
+    worksheet["A1"].Text = "=SUM(2+2)";
+
+    //Get the cell type of the cell
+    Syncfusion.XlsIO.Implementation.WorksheetImpl.TRangeValueType cellType =
+        (worksheet as WorksheetImpl).GetCellType(1, 1, false);
+
+    //Check if the cell type is string
+    if (cellType == TRangeValueType.String)
+    {
+        //Retrieve the formula text
+        string formulaText = worksheet["A1"].Text;
+
+        //Clear the cell value
+        worksheet["A1"].Value = string.Empty;
+
+        //Reassign the formula to the cell
+        worksheet["A1"].Formula = formulaText;
+    }
+
+    //Save the workbook
+    workbook.SaveAs("Output.xlsx");
+}
+{% endhighlight %}
+
+{% highlight vb.net tabtitle="VB.NET [Windows-specific]" %}
+Using excelEngine As New ExcelEngine()
+    Dim application As IApplication = excelEngine.Excel
+    application.DefaultVersion = ExcelVersion.Xlsx
+
+    'Create a new workbook with one worksheet
+    Dim workbook As IWorkbook = application.Workbooks.Create(1)
+    Dim worksheet As IWorksheet = workbook.Worksheets(0)
+
+    'Assign a formula as text to the cell
+    worksheet("A1").Text = "=SUM(2+2)"
+
+    'Get the cell type
+    Dim cellType As Syncfusion.XlsIO.Implementation.WorksheetImpl.TRangeValueType =
+        CType(worksheet, WorksheetImpl).GetCellType(1, 1, False)
+
+    'Check if the cell type is string
+    If cellType = TRangeValueType.String Then
+        'Retrieve the formula text
+        Dim formulaText As String = worksheet("A1").Text
+
+        'Clear the cell value
+        worksheet("A1").Value = String.Empty
+
+        'Reassign the formula to the cell
+        worksheet("A1").Formula = formulaText
+    End If
+
+    'Save the workbook
+    workbook.SaveAs(IO.Path.GetFullPath("Output/Output.xlsx"))
+End Using
+{% endhighlight %}
+{% endtabs %}       
+
+A complete working example in C# is present on <a href="https://github.com/SyncfusionExamples/XlsIO-Examples/tree/master/FAQ/Formula%20stored%20as%20text%20handling/.NET/FormulaStoredAsTextHandling">this GitHub page</a>.