import excel file to database using EPPlus - asp.net

Question

I am having a hard time understanding what should be a simple task. I am now using EPPlus to help me with this task. However, I am at a point of where I can't track what is going on. (per the comment below and days of google searching) I'm trying to read in an excel file and pass that to my EF model. It breaks down at line 159 where I am trying to put in the values from the excel file but keeps coming across as null. However when looking at the values past line 159 they all have the correct information. I am not sure how to even track a bug like this.
TruckController.cs
// POST: Trucks/Import
[HttpPost]
public ActionResult Import(FormCollection formCollection)
{
if (Request != null)
{
HttpPostedFileBase file = Request.Files["file"];
if ((file != null) && (file.ContentLength > 0) && !string.IsNullOrEmpty(file.FileName))
{
file.SaveAs(Server.MapPath("~/" + "test.xlsx"));
//string fileName = file.FileName;
// string fileContentType = file.ContentType;
byte[] fileBytes = new byte[file.ContentLength];
// var data = file.InputStream.Read(fileBytes, 0, Convert.ToInt32(file.ContentLength));
var MyImport = new List<string>();
MyImport = ImportDataRecords(new FileInfo(Server.MapPath("~/" ) + "test.xlsx"));
}
}
return View("Import");
}
public List<string> ImportDataRecords(FileInfo file)
{
var resultMessages = new List<string>();
var totalImported = 0;
try
{
using (var excelPackage = new ExcelPackage(file))
{
string DeliveryColumn,
ItemNoColumn,
MaterialColumn,
MaterialDescriptionColumn,
DeliveryQtytoPickColumn,
PickedQuantityColumn,
SalesUoMColumn,
BatchPickedColumn,
BinNoColumn,
BagWeightColumn,
PalletNoColumn,
PalletStackingNoColumn,
StageNoColumn,
SubStopNoColumn,
PickStatusColumn,
PackStatusColumn,
SoldToColumn,
SoldToNameColumn,
ShipToNameColumn;
if (!file.Name.EndsWith("xlsx"))
{
resultMessages.Add("File selected is not an Excel file");
return resultMessages;
}
var worksheet = excelPackage.Workbook.Worksheets[1];
if (worksheet == null)
{
resultMessages.Add("File was empty");
return resultMessages;
}
using (var headers = worksheet.Cells[1, 1, 1, worksheet.Dimension.End.Column])
{
var expectedHeaders = new[]
{
"Delivery", "Item No.", "Material", "Material Description", "Delivery Qty to Pick",
"Picked Quantity", "Sales UoM", "Batch Picked", "BIN No.", "Bag Weight", "Pallet No.",
"Pallet Stacking No", "Stage No", "Sub Stop No", "Pick Status", "Pack Status", "Sold-To",
"Sold-To Name", "Ship-To Name"
};
if (!expectedHeaders.All(e => headers.Any(h => h.Value.Equals(e))))
{
resultMessages.Add("Some columns are missing from the file");
return resultMessages;
}
DeliveryColumn = headers.First(h => h.Value.Equals("Delivery")).Address[0].ToString();
ItemNoColumn = headers.First(h => h.Value.Equals("Item No.")).Address[0].ToString();
MaterialColumn = headers.First(h => h.Value.Equals("Material")).Address[0].ToString();
MaterialDescriptionColumn = headers.First(h => h.Value.Equals("Material Description")).Address[0].ToString();
DeliveryQtytoPickColumn = headers.First(h => h.Value.Equals("Delivery Qty to Pick")).Address[0].ToString();
PickedQuantityColumn = headers.First(h => h.Value.Equals("Picked Quantity")).Address[0].ToString();
SalesUoMColumn = headers.First(h => h.Value.Equals("Sales UoM")).Address[0].ToString();
BatchPickedColumn = headers.First(h => h.Value.Equals("Batch Picked")).Address[0].ToString();
BinNoColumn = headers.First(h => h.Value.Equals("BIN No.")).Address[0].ToString();
BagWeightColumn = headers.First(h => h.Value.Equals("Bag Weight")).Address[0].ToString();
PalletNoColumn = headers.First(h => h.Value.Equals("Pallet No.")).Address[0].ToString();
PalletStackingNoColumn = headers.First(h => h.Value.Equals("Pallet Stacking No")).Address[0].ToString();
StageNoColumn = headers.First(h => h.Value.Equals("Stage No")).Address[0].ToString();
SubStopNoColumn = headers.First(h => h.Value.Equals("Sub Stop No")).Address[0].ToString();
PickStatusColumn = headers.First(h => h.Value.Equals("Pick Status")).Address[0].ToString();
PackStatusColumn = headers.First(h => h.Value.Equals("Pack Status")).Address[0].ToString();
SoldToColumn = headers.First(h => h.Value.Equals("Sold-To")).Address[0].ToString();
SoldToNameColumn = headers.First(h => h.Value.Equals("Sold-To Name")).Address[0].ToString();
ShipToNameColumn = headers.First(h => h.Value.Equals("Ship-To Name")).Address[0].ToString();
using (var context = new EPPlusTruckContext())
{
var lastRow = worksheet.Dimension.End.Row;
for (var row = 2; row <= lastRow; row++)
{
-----------Line 159-------------> var truck = new Truck()
{
Delivery = worksheet.Cells[DeliveryColumn + row].Value.ToString(),
ItemNo = worksheet.Cells[ItemNoColumn + row].Value.ToString(),
Material = worksheet.Cells[MaterialColumn + row].Value.ToString(),
MaterialDescription = worksheet.Cells[MaterialDescriptionColumn + row].Value.ToString(),
DeliveryQtyToPick = worksheet.Cells[DeliveryQtytoPickColumn + row].Value.ToString(),
PickedQuantity = worksheet.Cells[PickedQuantityColumn + row].Value.ToString(),
SalesUoM = worksheet.Cells[SalesUoMColumn + row].Value.ToString(),
BatchPicked = worksheet.Cells[BatchPickedColumn + row].Value.ToString(),
BinNo = worksheet.Cells[BinNoColumn + row].Value.ToString(),
BagWeight = worksheet.Cells[BagWeightColumn + row].Value.ToString(),
PalletNo = worksheet.Cells[PalletNoColumn + row].Value.ToString(),
PalletStackingNo = worksheet.Cells[PalletStackingNoColumn + row].Value.ToString(),
StageNo = worksheet.Cells[StageNoColumn + row].Value.ToString(),
SubStopNo = worksheet.Cells[SubStopNoColumn + row].Value.ToString(),
PickStatus = worksheet.Cells[PickStatusColumn + row].Value.ToString(),
PackStatus = worksheet.Cells[PackStatusColumn + row].Value.ToString(),
SoldTo = worksheet.Cells[SoldToColumn + row].Value.ToString(),
SoldToName = worksheet.Cells[SoldToNameColumn + row].Value.ToString(),
ShipToName = worksheet.Cells[ShipToNameColumn + row].Value.ToString(),
};
db.Trucks.Add(truck);
try
{
db.SaveChanges();
totalImported++;
}
catch (Exception ex)
{
resultMessages.Add(string.Format("Record on line#{0} failed: {1}\n", row, ex.Message));
}
}
}
}
resultMessages.Insert(0, string.Format("{0} records successfully imported.\n", totalImported));
return resultMessages;
}
}
catch (IOException ex)
{
resultMessages.Add("File still open. Please close Excel file before importing.");
return resultMessages;
}
}

Answer 1

A simple example here:
Reff: http://sforsuresh.in/read-data-excel-sheet-insert-database-table-c/
public bool readXLS(string FilePath)
{
FileInfo existingFile = new FileInfo(FilePath);
using (ExcelPackage package = new ExcelPackage(existingFile))
{
//get the first worksheet in the workbook
ExcelWorksheet worksheet = package.Workbook.Worksheets[1];
int colCount = worksheet.Dimension.End.Column; //get Column Count
int rowCount = worksheet.Dimension.End.Row; //get row count
string queryString = "INSERT INTO tableName VALUES"; //Here I am using "blind insert". You can specify the column names Blient inset is strongly not recommanded
string eachVal = "";
bool status;
for (int row = 1; row <= rowCount; row++)
{
queryString += "(";
for (int col = 1; col <= colCount; col++)
{
eachVal = worksheet.Cells[row, col].Value.ToString().Trim();
queryString += "'" + eachVal + "',";
}
queryString = queryString.Remove(queryString.Length - 1, 1); //removing last comma (,) from the string
if (row % 1000 == 0) //On every 1000 query will execute, as maximum of 1000 will be executed at a time.
{
queryString += ")";
status = this.runQuery(queryString); //executing query
if (status == false)
return status;
queryString = "INSERT INTO tableName VALUES";
}
else
{
queryString += "),";
}
}
queryString = queryString.Remove(queryString.Length - 1, 1); //removing last comma (,) from the string
status = this.runQuery(queryString); //executing query
return status;
}
}