如何上传Excel文件并添加列到数据库？

Question

i'm using open xml sdk dll in my Asp net MVC for uploading excel into my website.

there is 4 column in my excel file Name , Email , Company Name and Phone Number.

i use following code to get excel file from my view and save it in local disk and then access to it's cell for saving in my database.

**but there is problem in debugging the code. when i want to access cell that contain string it shows me it contains 0 but there is no problem in reading numbers.

it shows zero when my foreach item goes on cells that contains string .** any idea's?

edited Question: i managed to read cell's value with this code modification but there is another problem.according to This answer i should read shared string to read string but when i read DataType , it valued null in some random moment. so i cant read some cell's. i cant find the problem

here is controller code:

    [HttpPost]
    public IHttpActionResult UploadExcelFile()
    {
        try
        {
            var rnd = new Random();
            string filePath = "";
            var httpRequest = HttpContext.Current.Request;
            if (httpRequest.Files.Count < 1)
            {
                return Content(HttpStatusCode.BadRequest, "there's no file selected");
            }

            var guid = rnd.Next(999);
            var postedFile = httpRequest.Files[0];
            var serverFilePath = HttpContext.Current.Server.MapPath("~/Content/Email/" + guid + Path.GetExtension(postedFile.FileName));
            filePath = "/Content/Email/" + guid + Path.GetExtension(postedFile.FileName);
            postedFile.SaveAs(serverFilePath);


            using (SpreadsheetDocument spreadsheetDocument =SpreadsheetDocument.Open(serverFilePath, false))
            {
                List<string> colName = new List<string>(new string[] { "A", "B", "C","D" });

                var sheets = spreadsheetDocument.WorkbookPart.Workbook.Descendants<Sheet>();
                WorkbookPart workbookPart = spreadsheetDocument.WorkbookPart;
                WorksheetPart worksheetPart = workbookPart.WorksheetParts.First();
                Worksheet worksheet = worksheetPart.Worksheet;
                var rowCount = GetRowCount(worksheet);
                for (int i = 0; i < rowCount; i++)
                {  
                    Cell cell = GetCell(worksheet, colName[i], i+1);
                    Row row = GetRow(worksheet, i+1);
                    foreach (var item in row.ChildElements)
                    {
                        List<string> cellValue = new List<string>();

                        if (cell.DataType != null)
                        {
                            if (cell.DataType == CellValues.SharedString)
                            {
                                int id = -1;

                                if (Int32.TryParse(cell.InnerText, out id))
                                {
                                    SharedStringItem x = GetSharedStringItemById(workbookPart, id);

                                    if (x.Text != null)
                                    {
                                        cellValue.Add(x.Text.Text);
                                    }
                                    else if (item.InnerText != null)
                                    {
                                        cellValue.Add(x.InnerText);
                                    }
                                    else if (item.InnerXml != null)
                                    {
                                        cellValue.Add(x.InnerXml);
                                    }
                                }
                            }
                        }
                        else
                        {
                            cellValue.Add(item.InnerText);
                        }


                    }

                }



            }


            return Ok(new { message = "Record has been saved successfully" });
        }
        catch (Exception e)
        {
            return Content(HttpStatusCode.BadRequest, "there's problem with Server");

            throw;
        }
    }

Answer 1

        var connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=E:\\mybook.xlsx;Extended Properties=\"Excel 12.0 Xml;HDR=NO;IMEX=1;\"";


        var OledbConn = new OleDbConnection(connString);

        DataTable schemaTable = new DataTable();
        var OledbCmd = new OleDbCommand();
        OledbCmd.Connection = OledbConn;
        OledbConn.Open();
        OledbCmd.CommandText = "Select * from [StudentDetails$]";
        OleDbDataReader dr = OledbCmd.ExecuteReader();
        DataTable ContentTable = null;
        if (dr.HasRows)
        {
            ContentTable = new DataTable();
            ContentTable.Columns.Add("Name", typeof(string));
            ContentTable.Columns.Add("Email", typeof(string));
            ContentTable.Columns.Add("Company Name", typeof(string));
            ContentTable.Columns.Add("Phone Number", typeof(string));
            while (dr.Read())
            {
                if (dr[0].ToString().Trim() != string.Empty && dr[1].ToString().Trim() != string.Empty && dr[2].ToString().Trim() != string.Empty && dr[0].ToString().Trim() != " " && dr[1].ToString().Trim() != " " && dr[2].ToString().Trim() != " ")
                    ContentTable.Rows.Add(dr[0].ToString().Trim(), dr[1].ToString().Trim(), dr[2].ToString().Trim(), dr[3].ToString().Trim());

            }
        }
        dr.Close();
    }