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Reportapi/MyCode.Project.Infrastructure/Common/NPOIHelper.cs

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+using NPOI.HPSF;
+using NPOI.HSSF.UserModel;
+using NPOI.SS.Formula.Eval;
+using NPOI.SS.UserModel;
+using NPOI.SS.Util;
+using NPOI.XSSF.UserModel;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Data;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using System.Web;
+
+namespace MyCode.Project.Infrastructure.Common
+{
+    public class NPOIHelper
+    {
+
+        public static MemoryStream ExcelExport(DataTable table)
+        {
+
+
+            MemoryStream ms = new MemoryStream();
+            using (table)
+            {
+                IWorkbook workbook = new HSSFWorkbook();
+
+                ISheet sheet = workbook.CreateSheet();
+
+                IRow headerRow = sheet.CreateRow(0);
+                // handling header.
+                foreach (DataColumn column in table.Columns)
+                    headerRow.CreateCell(column.Ordinal).SetCellValue(column.Caption);//If Caption not set, returns the ColumnName value
+                // handling value.
+                int rowIndex = 1;
+                foreach (DataRow row in table.Rows)
+                {
+                    IRow dataRow = sheet.CreateRow(rowIndex);
+                    foreach (DataColumn column in table.Columns)
+                    {
+                        dataRow.CreateCell(column.Ordinal).SetCellValue(row[column].ToString());
+                    }
+                    rowIndex++;
+                }
+                workbook.Write(ms);
+                ms.Flush();
+                ms.Position = 0;
+            }
+
+
+            return ms;
+        }
+
+
+    }
+}