I have code that converts a .CSV file to a .XLSX file. The conversion goes well, but the WorkBook.SaveAs(#"file.xslx") method seems to only save the file to C:\Users[MyName]\Documents\file.xlsx. When I use Excel.Application.GetSaveAsFileName() it defaults to C:\Users[MyName]\Documents with a Save As dialog.
Furthermore, setting Excel.Application.DefaultFilePath doesn't seem to help unless I explicitly state F:.........
I have a relative working directory set, where a.csv is read from:
using Excel = Microsoft.Office.Interop.Excel;
StreamReader a = new StreamReader(#"a.csv");
var CSVContent = new List<string[]>();
Excel.Application excel = new Excel.Application();
excel.DefaultFilePath = #"Output\"; //doesn't do anything
Excel.Workbook workBook = excel.Workbooks.Add();
Excel.Worksheet sheet = workBook.ActiveSheet;
while (!a.EndOfStream)
{
string read = a.ReadLine();
CSVContent.Add(read.Split(','));
}
for (int i = 0; i < CSVContent.Count; i++) //write List contents to xlsx Line by Line
{
string[] csvLine = CSVContent[i];
for (int j = 0; j < csvLine.Length; j++)
{
sheet.Cells[i + 1, j + 1] = csvLine[j]; //Cells begin at 1 in Excel
}
}
var b = excel.GetSaveAsFilename("a.xlsx");
workBook.SaveAs(b);
workBook.Close();
How do I get workbook.SaveAs() to save into the solution relative working directory?
Relying on relative paths tends to be problematic. If you want to save it to the current directory of the application, use Environment.CurrentDirectory, that is:
var b = Environment.CurrentDirectory + #"\a.xlsx";
Related
All,
I have been struggling to simply reference an Excel file so that I can extract its data into a new worksheet automatically.
I know this means to create a new Excel file and its items:
Excel.Application oXL;
Excel._Workbook oWB;
Excel._Worksheet oSheet;
Excel.Range oRng;
//Start Excel and get Application object.
oXL = new Excel.Application();
oXL.Visible = true;
//Get a new workbook.
oWB = (Excel._Workbook)(oXL.Workbooks.Add(Missing.Value));
oSheet = (Excel._Worksheet)oWB.ActiveSheet;
But this is where I am lost...I want the user to select another Excel file through a file dialog and then I want to copy data from said file into the new workbook above.
Ex: New file, user selects "MyExcel.csv". How would I reference this so that I can, say, copy Column A into the new worksheet? Whatever works with C#.
Maybe this helps:
Make sure your manage your Nugets and add the reference "Microsoft.Office.Interop.Excel" --> (References (Right click) --> Manage Nuget Packages --> Browse --> "Microsoft.Office.Interop.Excel" --> Install)
Note: This is is a copy paste into the same worksheet. To copy the data into another worksheet from another file just pass the "worksheet" as parameter to the method and paste it there.
public class Excel1
{
private readonly string excelSufix = ".xlsx";
private readonly string excelFilePrefix = "..."; //Where you excel file is located
private string getFilePath(string fileName)
{
return excelFilePrefix + fileName + excelSufix; //returns the file path by the given file name
}
public void CopyPaste(string fileName, int worksheet, string toCopyRange, string whereInsertRange)
{
//Range should look like = "A:C" or "D:F"
var excelApp = new Microsoft.Office.Interop.Excel.Application();
excelApp.Visible = true;
var workBook = excelApp.Workbooks.Open(getFilePath(fileName));
var workSheet = (Microsoft.Office.Interop.Excel.Worksheet)workBook.Sheets[worksheet];
var toCopy = workSheet.Range[toCopyRange];
var whereInsert = workSheet.Range[whereInsertRange];
whereInsert.Insert(Microsoft.Office.Interop.Excel.XlInsertShiftDirection.xlShiftToRight, toCopy.Cut());
}
}
Edit: You could add a constructor to the class where you pass the file Path and some class variables which reference the file, the worksheet etc etc... In this case, you will have independent objects for each file
Based on your description, you want to copy one column from the csv file and paste in the new excel file.
First, I convert the csv file to datatable.
Second, I select the specific column and convert one column to datatable.
Third, I convert the datatable to the new excel file.
You can try the following code.
using System;
using System.Data;
using Excel = Microsoft.Office.Interop.Excel;
class Program
{
static void Main(string[] args)
{
string path = "D:\\t.csv";
DataTable table = ReadCsv(path);
table= new DataView(table).ToTable(false, "Tests");
ExportToExcel(table, "D:\\t.xlsx");
}
public static DataTable ReadCsv(string path)
{
Microsoft.Office.Interop.Excel.Application objXL = null;
Microsoft.Office.Interop.Excel.Workbook objWB = null;
objXL = new Microsoft.Office.Interop.Excel.Application();
objWB = objXL.Workbooks.Open(path);
Microsoft.Office.Interop.Excel.Worksheet objSHT = objWB.Worksheets[1];
int rows = objSHT.UsedRange.Rows.Count;
int cols = objSHT.UsedRange.Columns.Count;
DataTable dt = new DataTable();
int noofrow = 1;
for (int c = 1; c <= cols; c++)
{
string colname = objSHT.Cells[1, c].Text;
dt.Columns.Add(colname);
noofrow = 2;
}
for (int r = noofrow; r <= rows; r++)
{
DataRow dr = dt.NewRow();
for (int c = 1; c <= cols; c++)
{
dr[c - 1] = objSHT.Cells[r, c].Text;
}
dt.Rows.Add(dr);
}
objWB.Close();
objXL.Quit();
return dt;
}
public static void ExportToExcel( DataTable tbl, string excelFilePath = null)
{
try
{
if (tbl == null || tbl.Columns.Count == 0)
throw new Exception("ExportToExcel: Null or empty input table!\n");
// load excel, and create a new workbook
var excelApp = new Excel.Application();
excelApp.Workbooks.Add();
// single worksheet
Excel._Worksheet workSheet = excelApp.ActiveSheet;
// column headings
for (var i = 0; i < tbl.Columns.Count; i++)
{
workSheet.Cells[1, i + 1] = tbl.Columns[i].ColumnName;
}
// rows
for (var i = 0; i < tbl.Rows.Count; i++)
{
// to do: format datetime values before printing
for (var j = 0; j < tbl.Columns.Count; j++)
{
workSheet.Cells[i + 2, j + 1] = tbl.Rows[i][j];
}
}
// check file path
if (!string.IsNullOrEmpty(excelFilePath))
{
try
{
workSheet.SaveAs(excelFilePath);
excelApp.Quit();
Console.WriteLine("Excel file saved!");
}
catch (Exception ex)
{
throw new Exception("ExportToExcel: Excel file could not be saved! Check filepath.\n"
+ ex.Message);
}
}
else
{ // no file path is given
excelApp.Visible = true;
}
}
catch (Exception ex)
{
throw new Exception("ExportToExcel: \n" + ex.Message);
}
}
}
Initial csv file.
The excel file:
I have an existing Excel sheet which has headers. I get data from my server and place it in my WPF DataGrid and it looks like this:
On a click of a button, I need to place the values from my list to a particular sheet in my existing Excel workbook. I can actually get the values from a WINFORM DataGrid like this:
var xlApp = new Excel.Application();
Excel.Worksheet sheet = new Excel.Worksheet();
xlApp.Visible = true;
var path = #"D:\Reports\Tag_History.xlsx";
sheet = xlApp.Application.Workbooks.Open(path).Worksheets["Summary"];
var rowCount = dataGrid.Items.Count;
var rowColumn = dataGrid.Columns.Count;
for (int i = 0; i < rowCount - 1; i++)
{
for (int j = 0; j < 7; j++)
{
if (dataGrid[j, i].ValueType == typeof(string))
{
xlsht.Cells[i + 2, j + 1] = "'" + dataGrid[j, i].Value.ToString();
}
else
{
xlsht.Cells[i + 2, j + 1] = dataGrid[j, i].Value.ToString();
}
}
}
but since I am trying to do this in WPF, this code does not work anymore. This is by transferring dataGrid data to an existing excel file. Since I think that transferring list to an existing excel file is better, I have to try this. This is what I have so far:
var xlApp = new Excel.Application();
Excel.Worksheet sheet = new Excel.Worksheet();
xlApp.Visible = true;
var path = #"D:\Reports\Tag_History.xlsx";
sheet = xlApp.Application.Workbooks.Open(path).Worksheets["Summary"];
var range = sheet.Range["A2", "A2"];
foreach (var item in summaryList)
{
range.Value2 = item.TagNumber;
}
This code works but it is only updating a single cell of the excel file.
Can you please show me how to do this? Thank you.
Install Microsoft.Office.Interop.Excel Nuget package in your application. Right-click on your project -> "References" and choose "Manage NuGet Packages...", then just search for Excel. Otherwise, select Tools -> Nuget Package Manager -> Package Manager Console -> then install the Excel nuget (https://www.nuget.org/packages/Microsoft.Office.Interop.Excel/).
Bind the items in DataGrid and then export data to excel as like below,
private void btnExport_Click(object sender, RoutedEventArgs e)
{
Microsoft.Office.Interop.Excel.Application excel = null;
Microsoft.Office.Interop.Excel.Workbook wb = null;
object missing = Type.Missing;
Microsoft.Office.Interop.Excel.Worksheet ws = null;
Microsoft.Office.Interop.Excel.Range rng = null;
// collection of DataGrid Items
var dtExcelDataTable = ExcelTimeReport(txtFrmDte.Text, txtToDte.Text, strCondition);
excel = new Microsoft.Office.Interop.Excel.Application();
wb = excel.Workbooks.Add();
ws = (Microsoft.Office.Interop.Excel.Worksheet)wb.ActiveSheet;
ws.Columns.AutoFit();
ws.Columns.EntireColumn.ColumnWidth = 25;
// Header row
for (int Idx = 0; Idx < dtExcelDataTable.Columns.Count; Idx++)
{
ws.Range["A1"].Offset[0, Idx].Value = dtExcelDataTable.Columns[Idx].ColumnName;
}
// Data Rows
for (int Idx = 0; Idx < dtExcelDataTable.Rows.Count; Idx++)
{
ws.Range["A2"].Offset[Idx].Resize[1, dtExcelDataTable.Columns.Count].Value = dtExcelDataTable.Rows[Idx].ItemArray;
}
excel.Visible = true;
wb.Activate();
wb.SaveCopyAs("excel file location");
wb.Saved = true;
excel.Quit();
}
I have a simple document with one table in it. I would like to read its cells content. I found many tutorials for writing, but none for reading.
I suppose I should enumerate sections, but how to know which contains a table?
var document = DocX.Create(#"mydoc.docx");
var s = document.GetSections();
foreach (var item in s)
{
}
I'm using the following namespace aliases:
using excel = Microsoft.Office.Interop.Excel;
using word = Microsoft.Office.Interop.Word;
You can specifically grab the tables using this code:
private void WordRunButton_Click(object sender, EventArgs e)
{
var excelApp = new excel.Application();
excel.Workbooks workbooks = excelApp.Workbooks;
var wordApp = new word.Application();
word.Documents documents = wordApp.Documents;
wordApp.Visible = false;
excelApp.Visible = false;
// You don't want your computer to actually load each one visibly; would ruin performance.
string[] fileDirectories = Directory.GetFiles("Some Directory", "*.doc*",
SearchOption.AllDirectories);
foreach (var item in fileDirectories)
{
word._Document document = documents.Open(item);
foreach (word.Table table in document.Tables)
{
string wordFile = item;
appendName = Path.GetFileNameWithoutExtension(wordFile) + " Table " + tableCount + ".xlsx";
//Not needed if you're not going to save each table individually
var workbook = excelApp.Workbooks.Add(1);
excel._Worksheet worksheet = (excel.Worksheet)workbook.Sheets[1];
for (int row = 1; row <= table.Rows.Count; row++)
{
for (int col = 1; col <= table.Columns.Count; col++)
{
var cell = table.Cell(row, col);
var range = cell.Range;
var text = range.Text;
var cleaned = excelApp.WorksheetFunction.Clean(text);
worksheet.Cells[row, col] = cleaned;
}
}
workbook.SaveAs(Path.Combine("Some Directory", Path.GetFileName(appendName)), excel.XlFileFormat.xlWorkbookDefault);
//Last arg can be whatever file extension you want
//just make sure it matches what you set above.
workbook.Close();
Marshal.ReleaseComObject(workbook);
tableCount++;
}
document.Close();
Marshal.ReleaseComObject(document);
}
//Microsoft apps are picky with memory. Make sure you close and release each instance once you're done with it.
//Failure to do so will result in many lingering apps in the background
excelApp.Application.Quit();
workbooks.Close();
excelApp.Quit();
Marshal.ReleaseComObject(workbooks);
Marshal.ReleaseComObject(excelApp);
wordApp.Application.Quit();
wordApp.Quit();
Marshal.ReleaseComObject(documents);
Marshal.ReleaseComObject(wordApp);
}
The document is the actual word document type (word.Document). Make sure you check for split cells if you have them!
Hope this helps!
If you only have one table in document it should be rather simple. Try this:
DocX doc = DocX.Load("C:\\Temp\\mydoc.docx");
Table t = doc.Table[0];
//read cell content
string someText = t.Rows[0].Cells[0].Paragraps[0].Text;
You can loop through table rows and table cells inside each row, and also through Paragraphs inside each Cells[i] if there are more paragraphs. You can do that with simple for loop:
for (int i = 0; i < t.Rows.Count; i++)
{
someText = t.Rows[i].Cells[0].Paragraphs[0].Text;
}
Hope it helps.
I working with windows application and processing large excel file. I need to save 100k rows from datatable to excel file.
Currently my create excel function only support 65,500 rows only?
But I need to save excel file more than that. Is it possible?
If yes then, Kindly give the source?
Here is my code
public static void ExportDataSetToExcel(DataTable dt, int index, string strFilePathName)
{
Console.WriteLine("Creating Output Excel file");
string fileFomat = getExcelFileName(index) + (DateTime.Now.ToString("yyyyMMddTHHmmss"));
Microsoft.Office.Interop.Excel.Application objXL = null;
Microsoft.Office.Interop.Excel.Workbook objWB = null;
try
{
objXL = new Microsoft.Office.Interop.Excel.Application();
objWB = objXL.Workbooks.Add(1);
int sheetcount = 1;
Microsoft.Office.Interop.Excel.Worksheet objSHT = (Microsoft.Office.Interop.Excel.Worksheet)objWB.Sheets.Add();
Microsoft.Office.Interop.Excel.Range cells = objSHT.Cells;
cells.NumberFormat = "#";
//formatRange = objSHT.get_Range("b1",Type.Missing);
//formatRange.EntireRow.Font.Bold = true;
objSHT.Name = "RunOrderSheet";
for (int j = 0; j < dt.Rows.Count; j++)
{
for (int i = 0; i < dt.Columns.Count; i++)
{
//Condition to put column names in 1st row
//Excel work book indexes start from 1,1 and not 0,0
if (j == 0)
{
objSHT.Cells[1, i + 1] = dt.Columns[i].ColumnName.ToString();
}
//Writing down data
objSHT.Cells[j + 2, i + 1] = dt.Rows[j][i].ToString();
}
}
sheetcount++;
objWB.Saved = true;
objWB.SaveCopyAs(strFilePathName.Trim() + fileFomat.Trim() + ".xlsx");
objWB.Close();
objXL.Quit();
Console.WriteLine("Process done");
}
catch (Exception ex)
{
objWB.Saved = true;
objWB.Close();
objXL.Quit();
log.Error(ex.Message);
}
}
Excel and the COM interface with C# absolutely will support more than 65k lines. Just to prove that it's possible, run the following code:
public static void ExportDataSetToExcel()
{
Excel.Application objXL = null;
Excel.Workbook objWB = null;
objXL = new Microsoft.Office.Interop.Excel.Application();
objXL.Visible = true;
objWB = objXL.Workbooks.Add(1);
Excel.Worksheet objSHT = objWB.Sheets.Add();
for (int row = 1; row < 100000; row++)
{
objSHT.Cells[row, 1].Value2 = row;
}
objWB.SaveAs("c:\test\test.xlsx", Excel.XlFileFormat.xlOpenXMLWorkbook);
objWB.Close();
objXL.Quit();
}
Which leads me to several possibilities as to what your issue might be, in order of my suspicions (first being what I think is the most likely):
Since you have a try/catch block that is very nicely trapping errors and making sure that anything that happens within your loop while still saving the file, something is tripping the proverbial circuit breaker. While I don't see any glaring errors, it could be anything. Put a breakpoint within the catch block and see what ex contains. Also, make note of the specific record that is causing the error so you can step through just that one record and see where it occurs.
I noticed you are using SaveCopyAs rather than SaveAs. SaveCopyAs automatically saves in the exact same format as the original. I would think your Excel comes up with the default xlsx, but I certainly can't guarantee that. Using SaveAs with the explicit file format will guarantee it is saved in a format that supports more than 65k lines:
.
objWB.SaveAs("c:\test\test.xlsx", Excel.XlFileFormat.xlOpenXMLWorkbook);
Without knowing how large your datatable is, it might simply be a memory issue also that's tripping the try/catch.
I have a few different dictionaries with different categories of information and I need to output them all into an xls or csv file with multiple spreadsheets. Currently, I have to download each excel file for a specific date range individually and then copy and paste them together so they're on different sheets of the same file. Is there any way to download all of them together in one document? Currently, I use the following code to output their files:
writeCsvToStream(
organize.ToDictionary(k => k.Key, v => v.Value as IacTransmittal), writer
);
ms.Seek(0, SeekOrigin.Begin);
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName);
Response.AddHeader("Content-Length", ms.Length.ToString());
Response.ContentType = "application/octet-stream";
ms.CopyTo(Response.OutputStream);
Response.End();
where writeCsvToStream just creates the text for the individual file.
There are some different options you could use.
ADO.NET Excel driver - with this API you can populate data into Excel documents using SQL style syntax. Each worksheet in the workbook is a table, each column header in a worksheet is a column in that table etc.
Here is a code project article on the exporting to Excel using ADO.NET:
http://www.codeproject.com/Articles/567155/Work-with-MS-Excel-and-ADO-NET
The ADO.NET approach is safe to use in a multi-user, web app environment.
Use OpenXML to export the data
OpenXML is a schema definition for different types of documents and the later versions of Excel (the ones that use .xlsx, .xlsm etc. instead of just .xls) use this format for the documents. The OpenXML schema is huge and somewhat cumbersome, however you can do pretty much anything with it.
Here is a code project article on exporting data to Excel using OpenXML:
http://www.codeproject.com/Articles/692121/Csharp-Export-data-to-Excel-using-OpenXML-librarie
The OpenXML approach is safe to use in a multi-user, web app environment.
A third approach is to use COM automation which is the same as programmatically running an instance of the Excel desktop application and using COM to control the actions of that instance.
Here is an article on that topic:
http://support.microsoft.com/kb/302084
Note that this third approach (office automation) is not safe in a multi-user, web app environment. I.e. it should not be used on a server, only from standalone desktop applications.
If you're open to learning a new library, I highly recommend EPPlus.
I'm making a few assumptions here since you didn't post much code to translate, but an example of usage may look like this:
using OfficeOpenXml;
using OfficeOpenXml.Style;
public static void WriteXlsOutput(Dictionary<string, IacTransmittal> collection) //accepting one dictionary as a parameter
{
using (FileStream outFile = new FileStream("Example.xlsx", FileMode.Create))
{
using (ExcelPackage ePackage = new ExcelPackage(outFile))
{
//group the collection by date property on your class
foreach (IGrouping<DateTime, IacTransmittal> collectionByDate in collection
.OrderBy(i => i.Value.Date.Date)
.GroupBy(i => i.Value.Date.Date)) //assuming the property is named Date, using Date property of DateTIme so we only create new worksheets for individual days
{
ExcelWorksheet eWorksheet = ePackage.Workbook.Worksheets.Add(collectionByDate.Key.Date.ToString("yyyyMMdd")); //add a new worksheet for each unique day
Type iacType = typeof(IacTransmittal);
PropertyInfo[] iacProperties = iacType.GetProperties();
int colCount = iacProperties.Count(); //number of properties determines how many columns we need
//set column headers based on properties on your class
for (int col = 1; col <= colCount; col++)
{
eWorksheet.Cells[1, col].Value = iacProperties[col - 1].Name ; //assign the value of the cell to the name of the property
}
int rowCounter = 2;
foreach (IacTransmittal iacInfo in collectionByDate) //iterate over each instance of this class in this igrouping
{
int interiorColCount = 1;
foreach (PropertyInfo iacProp in iacProperties) //iterate over properties on the class
{
eWorksheet.Cells[rowCounter, interiorColCount].Value = iacProp.GetValue(iacInfo, null); //assign cell values by getting the value of each property in the class
interiorColCount++;
}
rowCounter++;
}
}
ePackage.Save();
}
}
}
Thanks for the ideas! I was eventually able to figure out the following
using Excel = Microsoft.Office.Interop.Excel;
Excel.Application ExcelApp = new Excel.Application();
Excel.Workbook ExcelWorkBook = null;
Excel.Worksheet ExcelWorkSheet = null;
ExcelApp.Visible = true;
ExcelWorkBook = ExcelApp.Workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
List<string> SheetNames = new List<string>()
{ "Sheet1", "Sheet2", "Sheet3", "Sheet4", "Sheet5", "Sheet6", "Sheet7"};
string [] headers = new string []
{ "Field 1", "Field 2", "Field 3", "Field 4", "Field 5" };
for (int i = 0; i < SheetNames.Count; i++)
ExcelWorkBook.Worksheets.Add(); //Adding New sheet in Excel Workbook
for (int k = 0; k < SheetNames.Count; k++ )
{
int r = 1; // Initialize Excel Row Start Position = 1
ExcelWorkSheet = ExcelWorkBook.Worksheets[k + 1];
//Writing Columns Name in Excel Sheet
for (int col = 1; col < headers.Length + 1; col++)
ExcelWorkSheet.Cells[r, col] = headers[col - 1];
r++;
switch (k)
{
case 0:
foreach (var kvp in Sheet1)
{
ExcelWorkSheet.Cells[r, 1] = kvp.Value.Field1;
ExcelWorkSheet.Cells[r, 2] = kvp.Value.Field2;
ExcelWorkSheet.Cells[r, 3] = kvp.Value.Field3;
ExcelWorkSheet.Cells[r, 4] = kvp.Value.Field4;
ExcelWorkSheet.Cells[r, 5] = kvp.Value.Field5;
r++;
}
break;
}
ExcelWorkSheet.Name = SheetNames[k];//Renaming the ExcelSheets
}
//Activate the first worksheet by default.
((Excel.Worksheet)ExcelApp.ActiveWorkbook.Sheets[1]).Activate();
//Save As the excel file.
ExcelApp.ActiveWorkbook.SaveCopyAs(#"out_My_Book1.xls");