diff --git a/Document-Processing-toc.html b/Document-Processing-toc.html index 610dc233e..bad8307d8 100644 --- a/Document-Processing-toc.html +++ b/Document-Processing-toc.html @@ -6805,6 +6805,9 @@
  • How to merge cells preserving topleft value and format in XlsIO?
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  • + How to get the last row of a column using XlsIO in Excel? +
    • diff --git a/Document-Processing/Excel/Excel-Library/NET/faqs/how-to-get-the-last-row-of-a-column-using-xlsio-in-excel.md b/Document-Processing/Excel/Excel-Library/NET/faqs/how-to-get-the-last-row-of-a-column-using-xlsio-in-excel.md new file mode 100644 index 000000000..4fa7dcefc --- /dev/null +++ b/Document-Processing/Excel/Excel-Library/NET/faqs/how-to-get-the-last-row-of-a-column-using-xlsio-in-excel.md @@ -0,0 +1,164 @@ +--- +title: Last row of a column in Excel file using XlsIO | Syncfusion +description: This FAQ explains how to find the last row with data in a specific column of an Excel worksheet using Syncfusion XlsIO and retrieve used range boundaries. +platform: document-processing +control: XlsIO +documentation: UG +--- + +# How to get the last row of a column using XlsIO in Excel? + +Finding the last row of a specific column helps you determine the exact extent of data in that column. XlsIO provides access to the worksheet's used range through the [IWorksheet.UsedRange](https://help.syncfusion.com/cr/document-processing/Syncfusion.XlsIO.IWorksheet.html) property, which you can use to iterate backward through rows and identify cells with data in a particular column. + +The following code example illustrates how to find the last row containing data in a specific column. + +{% tabs %} +{% highlight c# tabtitle="C# [Cross-platform]" %} +using (ExcelEngine excelEngine = new ExcelEngine()) +{ + // Create an instance of ExcelEngine + IApplication application = excelEngine.Excel; + IWorkbook workbook = application.Workbooks.Create(1); + + // Access the first worksheet in the workbook + IWorksheet sheet = workbook.Worksheets[0]; + + // Populate data in specific ranges to demonstrate last row detection + sheet["A1:B10"].Text = "10"; + sheet["C1:C5"].Text = "20"; + + // Find the last row in column C (column index 3) + int lastRow = GetLastRow(3, sheet as WorksheetImpl); + Console.WriteLine("Last Row in Column C: " + lastRow); + + // Save the workbook to the specified output path + workbook.SaveAs(Path.GetFullPath("Output/Output.xlsx")); +} + +// Helper method to find the last row containing data in a specified column +private static int GetLastRow(int column, WorksheetImpl worksheet) +{ + // Get the starting and ending row indices of the used range + int firstRow = worksheet.UsedRange.Row; + int lastRow = worksheet.UsedRange.LastRow; + + // Iterate backward through rows to find the last cell with data in the column + for (int iRow = lastRow; iRow >= firstRow; iRow--) + { + // Get or create the row storage for the current row + RowStorage rowStorage = WorksheetHelper.GetOrCreateRow(worksheet, iRow - 1, false); + if (rowStorage != null) + { + // Enumerate through cells in the row to check for data in the target column + RowStorageEnumerator enumerator = rowStorage.GetEnumerator(worksheet.RecordExtractor) as RowStorageEnumerator; + while (enumerator.MoveNext()) + { + // Return the row number when the column is found + if (enumerator.ColumnIndex + 1 == column) + return iRow; + } + } + } + return -1; +} +{% endhighlight %} + +{% highlight c# tabtitle="C# [Windows-specific]" %} +using (ExcelEngine excelEngine = new ExcelEngine()) +{ + // Create an instance of ExcelEngine + IApplication application = excelEngine.Excel; + IWorkbook workbook = application.Workbooks.Create(1); + + // Access the first worksheet in the workbook + IWorksheet sheet = workbook.Worksheets[0]; + + // Populate data in specific ranges to demonstrate last row detection + sheet["A1:B10"].Text = "10"; + sheet["C1:C5"].Text = "20"; + + // Find the last row in column C (column index 3) + int lastRow = GetLastRow(3, sheet as WorksheetImpl); + Console.WriteLine("Last Row in Column C: " + lastRow); + + // Save the workbook to the specified output path + workbook.SaveAs("Output.xlsx"); +} + +// Helper method to find the last row containing data in a specified column +private static int GetLastRow(int column, WorksheetImpl worksheet) +{ + // Get the starting and ending row indices of the used range + int firstRow = worksheet.UsedRange.Row; + int lastRow = worksheet.UsedRange.LastRow; + + // Iterate backward through rows to find the last cell with data in the column + for (int iRow = lastRow; iRow >= firstRow; iRow--) + { + // Get or create the row storage for the current row + RowStorage rowStorage = WorksheetHelper.GetOrCreateRow(worksheet, iRow - 1, false); + if (rowStorage != null) + { + // Enumerate through cells in the row to check for data in the target column + RowStorageEnumerator enumerator = rowStorage.GetEnumerator(worksheet.RecordExtractor) as RowStorageEnumerator; + while (enumerator.MoveNext()) + { + // Return the row number when the column is found + if (enumerator.ColumnIndex + 1 == column) + return iRow; + } + } + } + return -1; +} +{% endhighlight %} + +{% highlight vb.net tabtitle="VB.NET [Windows-specific]" %} +Sub Main(args As String()) + Using excelEngine As New ExcelEngine() + ' Create an instance of ExcelEngine + Dim application As IApplication = excelEngine.Excel + Dim workbook As IWorkbook = application.Workbooks.Create(1) + + ' Access the first worksheet in the workbook + Dim sheet As IWorksheet = workbook.Worksheets(0) + + ' Populate data in specific ranges to demonstrate last row detection + sheet("A1:B10").Text = "10" + sheet("C1:C5").Text = "20" + + ' Find the last row in column C (column index 3) + Dim lastRow As Integer = GetLastRow(3, TryCast(sheet, WorksheetImpl)) + Console.WriteLine("Last Row in Column C: " & lastRow) + + ' Save the workbook to the specified output path + workbook.SaveAs("Output.xlsx") + End Using +End Sub +' Helper method to find the last row containing data in a specified column +Private Function GetLastRow(column As Integer, worksheet As WorksheetImpl) As Integer + ' Get the starting and ending row indices of the used range + Dim firstRow As Integer = worksheet.UsedRange.Row + Dim lastRow As Integer = worksheet.UsedRange.LastRow + + ' Iterate backward through rows to find the last cell with data in the column + For iRow As Integer = lastRow To firstRow Step -1 + ' Get or create the row storage for the current row + Dim rowStorage As RowStorage = WorksheetHelper.GetOrCreateRow(worksheet, iRow - 1, False) + If rowStorage IsNot Nothing Then + ' Enumerate through cells in the row to check for data in the target column + Dim enumerator As RowStorageEnumerator = TryCast(rowStorage.GetEnumerator(worksheet.RecordExtractor), RowStorageEnumerator) + While enumerator.MoveNext() + ' Return the row number when the column is found + If enumerator.ColumnIndex + 1 = column Then + Return iRow + End If + End While + End If + Next + Return -1 +End Function +{% endhighlight %} +{% endtabs %} + +A complete working example in C# is present on this GitHub page. \ No newline at end of file