Update README.md

Author: vijayarasan

README.md

@@ -1,2 +1,71 @@
 # How-to-export-windows-forms-data-grid-stacked-headers-with-different-back-color-in-excel-and-pdf
 How to export the Windows Forms DataGrid StackedHeaders with different back color in Excel and PDF?
+
+# How to export the WinForms DataGrid StackedHeaders with different back color to Excel and PDF?
+
+## About the sample
+This example illustrates how to export the WinForms DataGrid StackedHeaders with different back color to Excel and PDF
+
+By default, actual value only will be exported to Pdf. You can customize StackedHeader cellstyle by using PdfGridCellStyle instance through CellExporting event in PdfExportingOptions.
+
+```C#
+    private void PDF_Exporting(object sender, EventArgs e)
+    {
+        PdfExportingOptions options = new PdfExportingOptions();
+        options.ExportStackedHeaders = true;
+        options.CellExporting += options_CellExporting;
+        var document = sfDataGrid1.ExportToPdf(options);
+        document.Save("Sample.pdf");
+    }
+
+    private void options_CellExporting(object sender, DataGridCellPdfExportingEventArgs e)
+    {
+        if(e.CellType==ExportCellType.StackedHeaderCell)
+        {
+            if(e.CellValue.ToString()=="Order Details")
+            {
+                 var cellStyle = new PdfGridCellStyle();
+                 cellStyle.BackgroundBrush = PdfBrushes.DarkCyan;
+                 cellStyle.TextBrush = PdfBrushes.White;
+                 e.PdfGridCell.Style = cellStyle;
+            }
+            else if (e.CellValue.ToString() == "Customer Details")
+            {
+                 var cellStyle = new PdfGridCellStyle();
+                 cellStyle.BackgroundBrush = PdfBrushes.LightCyan;
+                 e.PdfGridCell.Style = cellStyle;
+            }
+            else if (e.CellValue.ToString() == "City Details")
+            {
+                 var cellStyle = new PdfGridCellStyle();
+                 cellStyle.BackgroundBrush = PdfBrushes.DarkGray;
+                 cellStyle.TextBrush = PdfBrushes.White;
+                 e.PdfGridCell.Style = cellStyle;
+            }
+        }
+          
+    }
+```
+
+
+Exporting SfDataGrid StackedHeaders with different back colors by using ExcelExportingOptions by defining the cell style for the StackedHeader cell range. 
+
+```C#
+
+private void Excel_Exporting(object sender, EventArgs e)
+{
+    var options = new ExcelExportingOptions();
+    var excelEngine = sfDataGrid1.ExportToExcel(sfDataGrid1.View, options);
+    var workBook = excelEngine.Excel.Workbooks[0];
+    workBook.Worksheets[0].Range["A1:A1"].CellStyle.Color = Color.DarkCyan;
+    workBook.Worksheets[0].Range["A1:A1"].CellStyle.Font.Color = ExcelKnownColors.White;
+    workBook.Worksheets[0].Range["B1:C1"].CellStyle.Color = Color.LightCyan;
+    workBook.Worksheets[0].Range["B1:C1"].CellStyle.Font.Color = ExcelKnownColors.Black;
+    workBook.Worksheets[0].Range["D1:E1"].CellStyle.Color = Color.DarkGray;
+    workBook.Worksheets[0].Range["D1:E1"].CellStyle.Font.Color = ExcelKnownColors.White;
+    workBook.SaveAs("SampleRange.xlsx");
+ }
+```
+
+## Requirements to run the demo
+Visual Studio 2015 and above versions