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Merge pull request #2330 from Syncfusion-Content/hotfix/hotfix-v32.2.3
DOCINFRA-2341_merged_using_automation
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‎Document-Processing-toc.html‎

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<li>
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<a href="/document-processing/excel/excel-library/net/faqs/how-to-clear-formats-in-worksheet">How to clear formats in a worksheet using XlsIO?</a>
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</li>
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<li>
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<a href="/document-processing/excel/excel-library/net/faqs/how-to-get-the-file-extension-of-excel-file">How to get the file extension of an Excel file using XlsIO?</a>
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</li>
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<li>
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<a href="/document-processing/excel/excel-library/net/faqs/how-to-get-external-connection-name-and-change-table-name">How to get the external connection name from a QueryTable in an IListObject and how to change the table name using XlsIO?</a>
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</li>
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<li>
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<a href="/document-processing/excel/excel-library/net/faqs/why-formulas-referencing-the-deleted-column-show-ref-errors">Why do formulas referencing a deleted column show #REF! errors?</a>
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</li>
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</ul>
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</ul>

‎Document-Processing/Excel/Excel-Library/NET/faqs/how-to-get-external-connection-name-and-change-table-name.md‎

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---
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title: How to get external connection name and rename the table | Syncfusion
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description: This page shows how to access a QueryTable's external connection name and how to change a table name using Syncfusion .NET Excel library (XlsIO).
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platform: document-processing
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control: XlsIO
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documentation: UG
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---
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# How to access the external connection name and rename the table name?
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The example below shows how to read the external connection name from a [QueryTable](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.Implementation.QueryTableImpl.html#Syncfusion_XlsIO_Implementation_QueryTableImpl_ExternalConnection) on a [ListObject](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.IListObjects.html) (table) and how to rename the table using Syncfusion XlsIO. Ensure the worksheet contains a ListObject with an associated QueryTable.
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{% tabs %}
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{% highlight c# tabtitle="C# [Cross-platform]" %}
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using (ExcelEngine excelEngine = new ExcelEngine())
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{
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IApplication application = excelEngine.Excel;
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application.DefaultVersion = ExcelVersion.Xlsx;
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IWorkbook workbook = application.Workbooks.Open("InputTemplate.xlsx");
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IWorksheet worksheet = workbook.Worksheets[0];
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IListObject table = worksheet.ListObjects[0];
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// Get connection name
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string connectionName = table.QueryTable.ExternalConnection.Name;
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// Change table name
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table.Name = "New table name";
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// Saving the workbook
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workbook.SaveAs("Output.xlsx");
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}
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{% endhighlight %}
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{% highlight c# tabtitle="C# [Windows-specific]" %}
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using (ExcelEngine excelEngine = new ExcelEngine())
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{
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IApplication application = excelEngine.Excel;
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application.DefaultVersion = ExcelVersion.Xlsx;
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IWorkbook workbook = application.Workbooks.Open("InputTemplate.xlsx");
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IWorksheet worksheet = workbook.Worksheets[0];
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IListObject table = worksheet.ListObjects[0];
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// Get connection name
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string connectionName = table.QueryTable.ExternalConnection.Name;
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// Change table name
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table.Name = "New table name";
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// Saving the workbook
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workbook.SaveAs("Output.xlsx");
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}
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{% endhighlight %}
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{% highlight vb.net tabtitle="VB.NET [Windows-specific]" %}
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Using excelEngine As New ExcelEngine()
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Dim application As IApplication = excelEngine.Excel
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application.DefaultVersion = ExcelVersion.Xlsx
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Dim workbook As IWorkbook = application.Workbooks.Open("InputTemplate.xlsx")
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Dim worksheet As IWorksheet = workbook.Worksheets(0)
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Dim table As IListObject = worksheet.ListObjects(0)
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' Get connection name
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Dim connectionName As String = table.QueryTable.ExternalConnection.Name
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' Change table name
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table.Name = "New table name"
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' Saving the workbook
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workbook.SaveAs("Output.xlsx")
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End Using
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{% endhighlight %}
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{% endtabs %}

‎Document-Processing/Excel/Excel-Library/NET/faqs/how-to-get-the-file-extension-of-excel-file.md‎

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---
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title: How to get file extension of an Excel file | XlsIO | Syncfusion
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description: This page explains how to get the file extension of an Excel file using the Syncfusion .NET Excel library (XlsIO).
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platform: document-processing
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control: XlsIO
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documentation: UG
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---
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# How to get the file extension of an Excel file using XlsIO?
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When an Excel file is opened with XlsIO, you can obtain its full path and extension from the [WorkbookImpl.FullFileName](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.Implementation.WorkbookImpl.html#Syncfusion_XlsIO_Implementation_WorkbookImpl_FullFileName) property. The following code snippet illustrates this.
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{% tabs %}
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{% highlight c# tabtitle="C# [Cross-platform]" %}
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using (ExcelEngine excelEngine = new ExcelEngine())
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{
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IApplication application = excelEngine.Excel;
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IWorkbook workbook = application.Workbooks.Open("Sample.xlsx");
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string fileName = (workbook as WorkbookImpl).FullFileName;
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// Display file extension of excel file
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Console.WriteLine(Path.GetExtension(fileName));
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}
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{% endhighlight %}
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{% highlight c# tabtitle="C# [Windows-specific]" %}
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using (ExcelEngine excelEngine = new ExcelEngine())
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{
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IApplication application = excelEngine.Excel;
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IWorkbook workbook = application.Workbooks.Open("Sample.xlsx");
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string fileName = (workbook as WorkbookImpl).FullFileName;
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// Display file extension of excel file
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Console.WriteLine(Path.GetExtension(fileName));
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}
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{% endhighlight %}
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{% highlight vb.net tabtitle="VB.NET [Windows-specific]" %}
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Using excelEngine As New ExcelEngine()
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Dim application As IApplication = excelEngine.Excel
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Dim workbook As IWorkbook = application.Workbooks.Open("Sample.xlsx")
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Dim fileName As String = CType(workbook, WorkbookImpl).FullFileName
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' Display file extension of excel file
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Console.WriteLine(Path.GetExtension(fileName))
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End Using
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{% endhighlight %}
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{% endtabs %}
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‎Document-Processing/Excel/Excel-Library/NET/faqs/why-formulas-referencing-the-deleted-column-show-ref-errors.md‎

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---
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title: Formulas reference errors | Syncfusion
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description: This page explains why the formulas that referenced cells in the deleted column will display REF! errors.
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platform: document-processing
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control: XlsIO
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documentation: UG
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---
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# Why do formulas referencing a deleted column show #REF! errors?
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When a column is deleted either directly in Excel or programmatically using Syncfusion XlsIO the entire column is removed and the columns to the right shift left. If any formula referenced cells within the deleted column, Excel can no longer resolve those references. As a result, the affected formulas display #REF! errors to indicate that the referenced cells no longer exist. Syncfusion XlsIO follows the same behavior as Microsoft Excel in this scenario.

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