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Convert DataTable to excel file c# using epplus

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BlackSwan answered on May 6, 2022 Popularity 9/10 Helpfulness 3/10

answer Convert DataTable to excel file c# using epplus

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Convert DataTable to excel file c# using epplus

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 /// <summary>
        /// Convert DataTable to Excel File
        /// </summary>
        /// <param name="filePath">Excel FilePath</param>
        /// <param name="table">DataTable</param>
        /// <param name="fileName">Excel Filename</param>
        /// <returns></returns>
        public bool Write(string filePath, DataTable table, string fileName)
        {
            try
            {
                bool success = false;
                var today = Convert.ToDateTime(DateTime.Now).ToString("yyyyMMddHHmmss");
                //delete existing files
                // Util_Directory.DeleteFiles(filePath);
                var newDir = filePath + "\\" + today;
                //if dir not exist create
                Util_Directory.CreateDirectory(newDir);
                FileInfo file = new FileInfo(Path.Combine(newDir, fileName));
                ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
          
                using (var package = new ExcelPackage(file))
                {
                    var workSheet = package.Workbook.Worksheets.Add("Sheet1");
                    //add column headers
                    var columns = table.Columns.Cast<DataColumn>().Select(x => x.ColumnName).ToList();
                    int i = 1;
                    foreach (var column in columns)
                    {
                        workSheet.Cells[1, i].Value = column;
                        i++;
                    }

                    // add row values
                    int startRow = 2;
                    foreach (DataRow row in table.Rows)
                    {
                        int startColumn = 1;
                        foreach (var item in row.ItemArray)
                        {
                            workSheet.Cells[startRow, startColumn].Value = item;
                            startColumn++;
                        }
                        startRow++;
                    }

                    workSheet.Cells.AutoFitColumns();
                    package.Save();
                    success = true;
                }

                return success;
            }
            catch (Exception)
            {
                throw;
            }
        }

Popularity 9/10 Helpfulness 3/10 Language csharp

Source: Grepper

Tags: c# datatable epplus excel file using

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Contributed on May 10 2022

BlackSwan

0 Answers Avg Quality 2/10

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c# read excel file using epplus save to datatable

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// Pass to param the excel file location (path)
public DataTable Read(string filePath)
        {
            try
            {
                DataTable dt = new DataTable();
                FileInfo excelFile = new FileInfo(filePath);
                ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
                using (var package = new ExcelPackage(excelFile))
                {
                    ExcelWorksheet workSheet = package.Workbook.Worksheets[0];
                    //add column header
                    foreach (var firstRC in workSheet.Cells[1, 1, 1, workSheet.Dimension.End.Column])
                    {
                        dt.Columns.Add(firstRC.Text);
                    }

                    // add rows
                    for (int rN = 2; rN <= workSheet.Dimension.End.Row; rN++)
                    {
                        ExcelRange row = workSheet.Cells[rN, 1, rN, workSheet.Dimension.End.Column];
                        DataRow newR = dt.NewRow();
                        foreach (var cell in row)
                        {
                            newR[cell.Start.Column - 1] = cell.Text;
                        }

                        dt.Rows.Add(newR);
                    }
                }

                return dt;
            }
            catch (Exception ex)
            {

                throw new Exception(ex.Message);
            }
        }

Popularity 7/10 Helpfulness 2/10 Language csharp

Source: Grepper

Tags: c# datatable epplus

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Contributed on May 06 2022

BlackSwan

0 Answers Avg Quality 2/10

excel to datatable in c#

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// Using OleDb:
private static DataTable  ExcelToDataTable(string fileFullPath)
        {
            try
            {
                DataTable dt = new DataTable();
                string StartingColumn = "A";
                string EndingColumn = "D";
                string StartReadingFromRow = "1";
                string HDR = "YES";
                string ConStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source="
                            + fileFullPath + ";Extended Properties=\"Excel 12.0;HDR=" + HDR + ";IMEX=0\"";

                OleDbConnection cnn = new OleDbConnection(ConStr);
                cnn.Open();

                DataTable dtSheet = cnn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

                string sheetname = "";
                foreach (DataRow drSheet in dtSheet.Rows)
                {
                    if (drSheet["TABLE_NAME"].ToString().Contains("$"))
                    {

                        sheetname = drSheet["TABLE_NAME"].ToString();
                        OleDbCommand oconn = new OleDbCommand("select * from ["
                                + sheetname + StartingColumn + StartReadingFromRow + ":" + EndingColumn + "]", cnn);
                        OleDbDataAdapter adp = new OleDbDataAdapter(oconn);
                       
                        adp.Fill(dt);
                        cnn.Close();
                    }
                }

                return dt;
            }
            catch (Exception ex)
            {

                throw ex;
            }
        }

// ------------------------------------------------------
// using openxmlSDK:
using System.Data;
using System.Linq;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;

namespace Core_Excel.Utilities
{
    static class ExcelUtility
    {
        public static DataTable Read(string path)
        {
            var dt = new DataTable();

            using (var ssDoc = SpreadsheetDocument.Open(path, false))
            {
                var sheets = ssDoc.WorkbookPart.Workbook.GetFirstChild<Sheets>().Elements<Sheet>();
                var relationshipId = sheets.First().Id.Value;
                var worksheetPart = (WorksheetPart) ssDoc.WorkbookPart.GetPartById(relationshipId);
                var workSheet = worksheetPart.Worksheet;
                var sheetData = workSheet.GetFirstChild<SheetData>();
                var rows = sheetData.Descendants<Row>().ToList();

                foreach (var row in rows) //this will also include your header row...
                {
                    var tempRow = dt.NewRow();

                    var colCount = row.Descendants<Cell>().Count();
                    foreach (var cell in row.Descendants<Cell>())
                    {
                        var index = GetIndex(cell.CellReference);

                        // Add Columns
                        for (var i = dt.Columns.Count; i <= index; i++)
                            dt.Columns.Add();

                        tempRow[index] = GetCellValue(ssDoc, cell);
                    }

                    dt.Rows.Add(tempRow);
                }
            }

            return dt;
        }

        private static string GetCellValue(SpreadsheetDocument document, Cell cell)
        {
            var stringTablePart = document.WorkbookPart.SharedStringTablePart;
            var value = cell.CellValue.InnerXml;

            if (cell.DataType != null && cell.DataType.Value == CellValues.SharedString)
                return stringTablePart.SharedStringTable.ChildElements[int.Parse(value)].InnerText;

            return value;
        }

        public static int GetIndex(string name)
        {
            if (string.IsNullOrWhiteSpace(name))
                return -1;

            int index = 0;
            foreach (var ch in name)
            {
                if (char.IsLetter(ch))
                {
                    int value = ch - 'A' + 1;
                    index = value + index * 26;
                }
                else
                    break;
            }

            return index - 1;
        }
    }
}

Popularity 9/10 Helpfulness 2/10 Language csharp

Source: Grepper

Tags: c# datatable

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Contributed on Oct 20 2022

Rasel Ahmed

0 Answers Avg Quality 2/10

convert excel to datatable using epplus

Comment

 readonly DataTable dt = new DataTable();
        /// <summary>
        /// Convert excel file to DataTable by xml configuration
        /// </summary>
        /// <param name="xmllFilePath">xml filepath</param>
        /// <param name="excelFilePath">excel filePath</param>
        /// <returns>DataTable</returns>
        public DataTable Read(string xmllFilePath, string excelFilePath)
        {
            try
            {
                List<string> xmlColumns = MiscUtil.ExtractXMLToList(xmllFilePath);
                List<string> xcelColumnNames = new List<string>();

                FileInfo excelFile = new FileInfo(excelFilePath); ;
                ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
                using (ExcelPackage package = new ExcelPackage(excelFile))
                {
                    //get colmuns and store to list 
                    ExcelWorksheet workSheet = package.Workbook.Worksheets[0];
                    {
                        for (int i = 1; i <= workSheet.Dimension.End.Column; i++)
                        {
                            xcelColumnNames.Add(workSheet.Cells[1, i].Value.ToString());
                        }
                    }
                    //get indexes to compare xml and excel columns
                    Dictionary<string, int> indexes = MiscUtil.GetDictionaryOfListArray(xmlColumns, xcelColumnNames.ToArray());
                    //get the match columns and add to datatable columns
                    foreach (var header in indexes)
                    {
                        if (header.Value >= 0)
                        {
                            dt.Columns.Add(header.Key);
                        }
                    }
                    // add rows
                    foreach (ExcelWorksheet workSheetR in package.Workbook.Worksheets)
                    {
                       // int columnCnt = workSheetR.Dimension.End.Column;
                        int rowCnt = workSheetR.Dimension.End.Row;
                        var dicValue = indexes.Select(x => x.Value).ToList();
                        List<int> lstOfMatchColumn = dicValue.FindAll(x => x >= 0);
                        List<string> columns = new List<string>();

                        for (int row = 2; row <= rowCnt; row++)
                        {
                            foreach (var col in lstOfMatchColumn)
                            {
                                columns.Add(workSheetR.Cells[row, col + 1].Value?.ToString().Trim());
                            }

                            string[] columnsArray = MiscUtil.ConvertListToArray(columns);
                            dt.Rows.Add(columnsArray);
                            //clear so it will be new list of columns
                            columns.Clear();
                        }
                    }
                }
                return dt;
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }

Popularity 6/10 Helpfulness 1/10 Language csharp

Source: Grepper

Tags: c# datatable epplus excel using usin

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Contributed on May 10 2022

BlackSwan

0 Answers Avg Quality 2/10

Convert DataTable to excel file c# using epplus

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