Develop Reference

Interop Excel reads all Values into 1 Line

I'm tying to read an Excel-Sheet into an array, but when I read out of the array all values of the whole row are saved in the first column separated by ';'.
How can I save them properly in a 2-dimensional array?
This is my code:
using Microsoft.Office.Interop.Excel;
using System;
using System.IO;
namespace BB_Entwurf_2
{
class Program
{
public static void Main(string[] args)
{
ApplicationClass app = new ApplicationClass();
Workbook book = null;
Worksheet sheet = null;
string currentDir = Environment.CurrentDirectory;
string excelPath;
excelPath = Path.Combine(currentDir, "MyFile.csv");
app.Visible = false;
app.ScreenUpdating = false;
app.DisplayAlerts = false;
book = app.Workbooks.Open(excelPath);
sheet = (Worksheet)book.Worksheets[1];
int rowCount = sheet.UsedRange.Rows.Count;
Console.WriteLine(rowCount);
Range range = sheet.UsedRange;
object[,] myExcelFileValues = (object[,])range.Value2;
range = null;
string test = (Convert.ToString(myExcelFileValues[1,1]));
Console.WriteLine(test);
test = (Convert.ToString(myExcelFileValues[2,2]));
Console.WriteLine(test);
System.Runtime.InteropServices.Marshal.FinalReleaseComObject(sheet);
sheet = null;
book.Close(false);
System.Runtime.InteropServices.Marshal.FinalReleaseComObject(book);
book = null;
app.Quit();
System.Runtime.InteropServices.Marshal.FinalReleaseComObject(app);
app = null;
Console.Write("Press any key to continue . . . ");
Console.ReadKey(true);
}
}
}

I'll agree with the comments about a CSV parser, but if you're dead set on using Excel, it won't automatically delimit on your semicolon. You'll need to perform a text to columns first. Something like:
range.TextToColumns(range[1, 1], XlTextParsingType.xlDelimited, XlTextQualifier.xlTextQualifierDoubleQuote, Semicolon: true);
If most/all of the values are strings, you could just split in your c#.
The aforementioned "CSV parser" solution would just be:
excelPath = Path.Combine(currentDir, "MyFile.csv");
string[] lines = File.ReadAllLines(excelPath);
List<string[]> values = new List<string[]>();
foreach (string line in lines)
{
values.Add(line.Split(';'));
}
// parse strings into int, double, date, etc.
Actually less code and no required installations...

You can take first blank array and take a loop to get value one by one as follow
string[] arr = new string[];
Excel.Application application = new Excel.Application();
Excel.Workbook workbook = application.Workbooks.Open(path);
Excel.Worksheet worksheet = workbook.ActiveSheet;
Excel.Range range = worksheet.UsedRange;
for (int row = 1; row <= range.Rows.Count; row++)
{
arr[row-1] = ((Excel.Range)range.Cells[row, 1]).Text;
}

Worksheet.get_Range method using incorrect date format

I am trying to read all cell values(dates) from a .CSV file in a range using the Worksheet.get_Range method.
The values(dates) within the cells are being converted in DateTime objects which can be found within range.Value. Unfortunately the converted dates and months are being switched. It is obviously assuming on US date/time formatting rather than UK.
How can I get the these dates to be interpreted using the UK format of 'dd/mm/yy'?
So far I have tried this (although had no luck).
System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-GB");
Here is how I am using the get_range method
Microsoft.Office.Interop.Excel.Application excelApp = null;
Workbooks workBooks = null;
Workbook workBook = null;
Worksheet workSheet = new Worksheet();
excelApp = new Microsoft.Office.Interop.Excel.Application();
excelApp.DisplayAlerts = false;
workBooks = excelApp.Workbooks;
workBook = workBooks.Open(filePath, AddToMru: false);
workSheet = workBook.Worksheets.get_Item(1);
int activeRowCount = workSheet.UsedRange.Rows.Count;
string startCell = row + "1";
string endCell = row + activeRowCount.ToString();
Range xlRng = workSheet.get_Range(startCell, endCell)

DateTimePicker value from Excel

I am wondering if it is possible to set the value of a DateTimePicker from a queried row in excel. I have tried different ways of doing it but have never came close and anyone help?
Also it all is displayed on a windows form

public void ReadAndWriteToExcel()
{
string myPath = #"C:\Excel.xls";
FileInfo fi = new FileInfo(myPath);
if (!fi.Exists)
{
Console.Out.WriteLine("file doesn't exists!");
}
else
{
var excelApp = new Microsoft.Office.Interop.Excel.Application();
var workbook = excelApp.Workbooks.Open(myPath);
Worksheet worksheet = workbook.ActiveSheet as Worksheet;
// To write to excel
Microsoft.Office.Interop.Excel.Range range = worksheet.Cells[1, 1] as Range;
DateTime dt = dateTimePicker1.Value;
range.NumberFormat = "dd/MMM/yyyy";
range.Value2 = dt;
// To read,
var date = worksheet.Cells[1, 1].Value;
Console.Out.WriteLine(date.ToString());
workbook.Save();
workbook.Close();
}
}
you must add "Microsoft.Office.Core" and "Microsoft.Office.Interop.Excel" references to your project and use them.

Copying A Formula--And applying it to a new cell range

So here's what I am going through. I am using the Excel dll with c# in order to go inside a big and nasty excel sheet so that others don't have to.
We have a formula in one cell that is rather large and we don't want to copy it to every row because of this. This formula uses multiple values on the row that it is placed on. If it is on row 1, it uses lots of cells from that row.
When one copies this formula normally in excel, the new ranges of the cells are modified to reflect the new starting position.
The problem is that when I copy the formula like this, it still gives me all of the values that have to do with the first row instead of the row where I pasted it.....Here is my code:
sheet.Cells[77][row].Formula = sheet.Cells[77][1].Formula;
Can somebody let me know how to make the formula actually apply to the new row instead of row 1?

This will probably work, as it works from VBA... in most cases.
sheet.Cells[77][row].FormulaR1C1 = sheet.Cells[77][1].FormulaR1C1;
This would work because FormulaR1C1(not a very informative link) uses R1C1 notation which describes the referenced cells location in relation to the current cell instead of saying which cells to use. This means the actual references are dependent on the cell with the formula. When you just use Formula, you're copying the string of the Formula exactly including the hard coded cell references.

You could use Application.ConvertFormula
So, let's say my Cell = Cells77 has a formula that says =Sum(B77,C77) (Cells from the same row).
if want to copy it to a cell right below it, you would do something like:
string formula = Sheet1.Cells[77][2].Formula;
Sheet1.Cells[77][2].Formula = app.ConvertFormula(formula, XlReferenceStyle.xlA1, XlReferenceStyle.xlR1C1, XlReferenceType.xlRelative, Sheet1.Cells[77][3]);
Full console app that works (You need to modify cells though).
static void Main(string[] args)
{
var app = new Microsoft.Office.Interop.Excel.Application();
var workbook = app.Workbooks.Open(#"C:\Users\user\Desktop\Book1.xlsx");
Microsoft.Office.Interop.Excel.Worksheet Sheet1 = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets.get_Item("Sheet1");
string formula = Sheet1.Cells[5][3].Formula;
Sheet1.Cells[5][4].Formula = app.ConvertFormula(formula, XlReferenceStyle.xlA1, XlReferenceStyle.xlR1C1, XlReferenceType.xlRelative, Sheet1.Cells[5][3]);
workbook.SaveAs(#"C:\Users\user\desktop\test.xlsx");
workbook.Close();
}
You can modify third and forth parameter of ConvertFormula method to your liking. Read more about the method here: ConvertFormula.
If you want to stretch formula accross multiple rows, you can try to use range.AutoFill()

Hi guys m posting this because this code is used to copy the formula behind a cell in Excel:
public void copy_Formula_behind_cell()
{
Excel.Application xlapp;
Excel.Workbook xlworkbook;
Excel.Worksheet xlworksheet;
Excel.Range xlrng;
object misValue = System.Reflection.Missing.Value;
xlapp = new Excel.Application();
xlworkbook =xlapp.Workbooks.Open("YOUR_FILE", 0, true, 5, "",
"",true,Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t",
false,
false, 0, true, 1, 0);
xlworksheet = (Excel.Worksheet)xlworkbook.Worksheets.get_Item(1);
string sp = xlworksheet.Cells[3,2].Formula;//It will Select Formula using Fromula method//
xlworksheet.Cells[8,2].Formula =
xlapp.ConvertFormula(sp,XlReferenceStyle.xlA1,
XlReferenceStyle.xlR1C1, XlReferenceType.xlAbsolute,
xlworksheet.Cells[8][2]);
//This is used to Copy the exact formula to where you want//
xlapp.Visible = true;
xlworkbook.Close(true, misValue, misValue);
xlapp.Quit();
releaseObject(xlworksheet);
releaseObject(xlworkbook);
releaseObject(xlapp);
}
private void releaseObject(object obj)
{
try
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
obj = null;
}
catch (Exception ex)
{
obj = null;
MessageBox.Show("Unable to release the Object " + ex.ToString());
}
finally
{
GC.Collect();
}
}

I am posting this code for range the excel formulas using c# code and Microsoft.Office.Interop.Excel Library:
class Program
{
static void Main(string[] args)
{
Program p = new Program();
p.Excel();
}
public void Excel()
{
Application xlApp = new Application();
Workbook xlWorkBook;
Worksheet xlWorkSheet;
object misValue = Missing.Value;
xlWorkBook = xlApp.Workbooks.Add(misValue);
xlWorkSheet = (Worksheet)xlWorkBook.Worksheets.get_Item(1);
for (int r = 1; r < 5; r++) //r stands for ExcelRow and c for ExcelColumn
{
// Its a my sample example: Excel row and column start positions for writing Row=1 and Col=1
for (int c = 1; c < 3; c++)
{
if (c == 2)
{
if (r == 1)
{
xlWorkSheet.Cells[r, c].Formula = "=SUM(A1+200)";
}
continue;
}
xlWorkSheet.Cells[r, c] = r;
}
}
Range rng = xlWorkSheet.get_Range("B1");
// This is the main code we can range our excel sheet formulas
rng.AutoFill(xlWorkSheet.get_Range("B1", "B4"), XlAutoFillType.xlLinearTrend);
xlWorkBook.Worksheets[1].Name = "MySheetData";//Renaming the Sheet1 to MySheet
xlWorkBook.SaveAs(#"E:\test.xlsx");
xlWorkBook.Close();
Marshal.ReleaseComObject(xlWorkSheet);
Marshal.ReleaseComObject(xlWorkBook);
Marshal.ReleaseComObject(xlApp);
}
}

ListBox to Excel

Ok, so I have a class, customer, that I use to process data, and then add to a list box, like below:
//Submit data from current form
customer aCustomer = new customer(comboBox1.Text, textBox1.Text, ChannelSelecBox.Text,
PurchaserTextBox.Text, NameTextBox.Text, emailTextBox.Text, AddressTextBox.Text, StateBox.Text,
PayMethodDropDown.Text, Prod1Num.Value.ToString(), Prod2Num.Value.ToString(),
Prod3Num.Value.ToString(), Prod4Num.Value.ToString(), Prod5Num.Value.ToString(),
Prod6Num.Value.ToString(), SubTData.Text, DiscountTextBox.Text, TaxData.Text, CommentTextBox.Text,
ShipData.Text, TotalData.Text);
// Add aCustomer to ListBox
Orders.Items.Add(aCustomer);
I have a string override so that the listbox just displays the purchaser and the date.
Now I want to take all the orders entered into the list box and put, most of, this data into an excel spreadsheet, each into it's own column. How could I do this?
If you need more information or to see more of my code, let me know.

try the following;
object oOpt = System.Reflection.Missing.Value; //for optional arguments
Excel.Application oXL = new Excel.Application();
Excel.Workbooks oWBs = oXL.Workbooks;
Excel.Workbook oWB = oWBs.Add(Excel.XlWBATemplate.xlWBATWorksheet);
Excel.Worksheet oSheet = (Excel.Worksheet)oWB.ActiveSheet;
//outputRows is a List<List<object>>
int numberOfRows = outputRows.Count;
int numberOfColumns = outputRows.Max(list => list.Count);
Excel.Range oRng =
oSheet.get_Range("A1", oOpt)
.get_Resize(numberOfRows, numberOfColumns);
object[,] outputArray = new object[numberOfRows, numberOfColumns];
for (int row = 0; row < numberOfRows; row++)
{
for (int col = 0; col < outputRows[row].Count; col++)
{
outputArray[row, col] = outputRows[row][col];
}
}
oRng.set_Value(oOpt, outputArray);
oXL.Visible = true;
more details can be found at http://csharp.net-informations.com/excel/csharp-create-excel.htm

Use CSV as file format, not XLS. Excel is a pain. Especially when reading from XLS. Some incorrect cell formatting and you sometimes get the value, but sometimes not. Even in same file. Personal experience.