Interop excel save file

Ma_Russia, У меня вопрос. Какая версия Excel у вас установлена на компьютере?
Предлагаю следующие варианты Excel 97, 2000, 2003, 2007, 2010, 2013, 2016.

Если у вас установлена одна из версий 2007, 2010, 2013, 2016, то почему вы сохраняете с форматом XLS?
Аргумент XlFileFormat.xlWorkbookDefault говорит «необходимо сохранить файл с форматом «XLSX»

Вам нужно сперва определится какая версия Excel у вас стоит и с каким форматом вы хотите сохранить файл

Я сейчас переписал ваш код немного. Попробуйте его.

Напишите эту строку в самом верху

using Excel = Microsoft.Office.Interop.Excel;

почитайте комментарии в коде.
Если вам надо сохранить файл именно в формате Excel 2003, то раскомментируйте этот блок, а другой блок, который сохраняет в формате Excel 2007 наоборот закомментируйте.

и укажите свой путь к сохранению файла.

У меня установлен Excel 2013, соответственно я сохраняю файл в формат Excel 2007 (XLSX)

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            Excel.Application xlApp = new Excel.Application(); //Excel
            Excel.Workbook xlWB; //рабочая книга              
            Excel.Worksheet xlSht; //лист Excel   
 
            xlWB = xlApp.Workbooks.Add(); //создаём рабочую книгу Excel 
            xlSht = xlApp.ActiveSheet; //Лист1
 
            int colCount = dataGridView1.ColumnCount;
            int rowCount = dataGridView1.RowCount;
 
            for (int i = 0; i < rowCount; i++)
            {
                for (int j = 0; j < colCount; j++)
                {
                    xlSht.Cells[i + 1, j + 1] = dataGridView1.Rows[i].Cells[j].Value;
                }
            }
            xlApp.Visible = false; //не отображается сам файл
            xlApp.UserControl = true;
 
            string folder = @"G:"; //путь папке   
 
 
            // ЕСЛИ НУЖНО СОХРАНИТЬ ФАЙЛ В ФОРМАТЕ EXCEL 2003 (XLS) 
            //string filenameExcel2003 = "Мой Excel файл.xls"; //имя Excel файла, формат Excel 2003
            //string fullfilename2003 = System.IO.Path.Combine(folder, filenameExcel2003);
            //if (System.IO.File.Exists(fullfilename2003)) System.IO.File.Delete(fullfilename2003);
            //xlWB.SaveAs(fullfilename2003, Excel.XlFileFormat.xlExcel8); //формат Excel 2003
 
 
            // ЕСЛИ НУЖНО СОХРАНИТЬ ФАЙЛ В ФОРМАТЕ EXCEL 2007 (XLSX) 
            string filenameExcel2007 = "Мой Excel файл.xlsx"; //имя Excel файла, формат Excel 2007
            string fullfilename2007 = System.IO.Path.Combine(folder, filenameExcel2007);
            if (System.IO.File.Exists(fullfilename2007)) System.IO.File.Delete(fullfilename2007);
            xlWB.SaveAs(fullfilename2007, Excel.XlFileFormat.xlWorkbookDefault); //формат Excel 2007
 
            xlWB.Close(false); //false - закрыть рабочую книгу не сохраняя изменения
            xlApp.Quit(); //закрываем приложение Excel
            MessageBox.Show("Файл сохранён!", "Сохранение файла", MessageBoxButtons.OK, MessageBoxIcon.Information);

Не по теме: я не советую вам сохранять данные из DataGridView таким способом — бегая циклом по ячейкам листа Excel. Это очень медленный способ. Нужно сперва данные загружать в двумерный массив из DataGridView, а потом одной строкой выгружать их на лист в Excel

This article will demonstrate some basic skills of controlling Excel by using C#, including Create, Open, Save Excel files, Add/Delete

Sheet, Add/Delete/Hide rows and columns, format cells and Export data to Excel. I hope this resource is

useful for some of you.

Import Namespace

using Microsoft.Office.Core;
using Microsoft.Office.Interop.Excel;
using System.IO;
using System.Reflection;

1. How to Open an Excel File, or Create a New Excel File

Application app = new Application();
Workbooks objWBs = app.Workbooks;
_Workbook _objWB = objWBs.Add(xxx);

Open an existing Excel file, please replace “xxx” with the excel file path.

Create a new Excel file, please replace “xxx” with “true”.

Note: There is only one worksheet in the Excel file.

2. Get, Delete and Add Sheet

Sheets shs = _objWB.Sheets;

2.1 Get

//i is index of the sheet which you want get: _Worksheet _objWS = (_Worksheet)shs.get_Item(i)

2.2 Delete

//must do when delete app.DisplayAlerts = false;
_objWS.Delete();

2.3 Add

a(before),b(after):after which sheet; c:NumberOfSheets to add;d:type (normal, hidden or charttype)
app.Worksheets.Add(a,b,c,d);

2.4 Rename Sheet

_objWS.Name = "xxx";

3. Delete Rows and Columns

3.1 Delete Rows

((Range)_objWS.Rows[3, Missing.Value]).Delete(XlDeleteShiftDirection.xlShiftUp);

3.2 Delete Columns

_objWS.get_Range(
_objWS.Cells[1, 2],
_objWS.Cells[_objWS.Rows.Count, 2]).Delete(XlDeleteShiftDirection.xlShiftToLeft
);

4. Add Rows and Columns

4.1 Add Rows

((Range)_objWS.Rows[11, Missing.Value])
.Insert(Missing.Value, XlInsertFormatOrigin.xlFormatFromLeftOrAbove);

4.2 Add Columns

_objWS.get_Range(
_objWS.Cells[1, 1], _objWS.Cells[_objWS.Rows.Count, 1])
.Insert(Missing.Value, XlInsertShiftDirection.xlShiftToRight);

5. Format Cells

5.1 Get Cell

//Get cell object _objWS.Cells[row, cell]

5.2 Set Formula

//input formula in the cell _objWS.Cells[row, cell] = "=Sum(A1/B1)";

5.3 Merge Cells

((Range)_objWS.Rows[1, Missing.Value]).Merge(Missing.Value);

5.4 Set Row Height and Column Width

((Range)_objWS.Rows[3, Missing.Value]).RowHeight = 5;
((Range)_objWS.Rows[3, Missing.Value]).ColumnWidth = 5;

5.5 Set Cell Color (56 Choices) Color Table Attached

((Range)_objWS.Rows[1, Missing.Value]).Interior.ColorIndex = 3;

5.6 Set Font Size

((Range)_objWS.Cells[1, "B"]).Font.Size = 8;

5.7 Set Font Bold

((Range)_objWS.Rows[1, Missing.Value]).Font.Bold = false;

5.8 Set Cell or Field Horizontal and Center

((Range)_objWS.Cells[2, 1]).HorizontalAlignment = XlVAlign.xlVAlignCenter;

5.9 Set Field Borders

((Range)_objWS.Cells[3, 3]).Borders.LineStyle = 3;

5.10 Set Border Lines (Upside, Downside, Left Side and Right Side)

//Left side border line _objWS.get_Range(
_objWS.Cells[2, 1], _objWS.Cells[2, 2])
.Borders[XlBordersIndex.xlEdgeLeft].Weight = XlBorderWeight.xlThick;//	 
//Right side border line _objWS.get_Range(
_objWS.Cells[2, 1], _objWS.Cells[2, 2])
.Borders[XlBordersIndex.xlEdgeRight].Weight = XlBorderWeight.xlThick;//	 
//Upside border line _objWS.get_Range(
_objWS.Cells[2, 1], _objWS.Cells[2, 2])
.Borders[XlBordersIndex.xlEdgeTop].Weight = XlBorderWeight.xlThick;//? 	 
//Downside border line _objWS.get_Range(
_objWS.Cells[2, 1], _objWS.Cells[2, 2])
.Borders[XlBordersIndex.xlEdgeBottom].Weight = XlBorderWeight.xlThick;

6. Copy Selected Field

_Worksheet _objWS = (_Worksheet)shs.get_Item(1);// Copy selected field content 	 
Range range = _objWS.get_Range(_objWS.Cells[7, 1], _objWS.Cells[10, 

_objWS.Columns.Count]);

range.Select();
range.Copy(Type.Missing);

//Select paste starting position Range test = ((Range)_objWS.Cells[11, 1]);
test.Select();

// Shield Alert, default confirm paste app.DisplayAlerts = false;
test.Parse(Missing.Value, Missing.Value);

Note: Type Missing and Missing Value are considered as some parameters’ default value. Most of time, they are form complemented parameters.

8. Save Excel and Follow-up Processes

8.1 Save Excel File

// Shield Alert popped up from system app.AlertBeforeOverwriting = false;

// Save to selected file path SaveAs(filePath, Missing.Value, Missing.Value, Missing.Value, Missing.Value, 
Missing.Value, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, 
Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

Note: It’s the only solution for saving the Excel file. Otherwise, there will generate a corresponding copy in “My File”.

8.2 Follow-up Processes: Exit and Release

//_objWB.Close(null, null, null); //objWBs.Close(); app.Quit();

// Release unnecessary excel processes System.Runtime.InteropServices.Marshal.ReleaseComObject(app);
app = null;

Note: During the process of closing application, we usually have 2 solutions:

• Directly exit app
• Close workbook, close workbooks, exit app. (Recommended)

9. Set Cell Field and Get the Necessary Data from Field

9.1 If cell has been set as drop-down box

// Here the “1, 2, 3” means the drop-down box value  ((Range)_objWS.Cells[2, 1])
.Validation.Modify(XlDVType.xlValidateList, XlDVAlertStyle.xlValidAlertStop, 
	Type.Missing, "1,2,3", Type.Missing);

9.2 If cell has not been set as drop-down box

((Range)_objWS.Cells[2, 1])
.Validation.Add(XlDVType.xlValidateList, XlDVAlertStyle.xlValidAlertStop, 
	Type.Missing,"1,2,3", Type.Missing);

9.3 Get drop-down box field value

string strValue = ((Range)_objWS.Cells[2, 1]).Validation.Formula1;

Note: In the excel template, if set drop-down box value through effectiveness, strValue will get the formula of excel, which need be converted.

After get strValue, you can get the numerical value according to index.

10. Hide Rows and Hide Columns

10.1 Hide Rows

_objWS.get_Range(_objWS.Cells[19, 1], _objWS.Cells[22, 

1]).EntireRow.Hidden = true;

10.2 Hide Columns

_objWS.get_Range(_objWS.Cells[1, 1], _objWS.Cells[_objWS.Rows.Count, 1])
.EntireColumn.Hidden = true;

11. Convert Excel to PDF (Excel 2007 onwards)

For security reasons, sometimes we need convert Excel to PDF format. However, we can also use C# to do this job. By easily using “Document.ExportAsFixedFormat”

method, we can convert this Excel worksheet to PDF format. Do as the following codes:

objWB.ExportAsFixedFormat(paramExportFormat, pdfPath, paramExportQuality, paramIncludeDocProps, paramIgnorePrintAreas, paramFromPage,  paramToPage, 

paramOpenAfterPublish,mis);

See more:

Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.ApplicationClass();

excelApp.Visible = true;

Microsoft.Office.Interop.Excel.Workbook excelWorkbook = excelApp.Workbooks.Open(varFileName,0, false, 5, """, """, false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, """,
                true, false, 0, true, false, false);
                Microsoft.Office.Interop.Excel.Worksheet workSheet = (Microsoft.Office.Interop.Excel.Worksheet)excelWorkbook.ActiveSheet;

workSheet.Activate();

excelApp.ActiveWorkbook.Save();
excelApp.ActiveWorkbook.Close((Object)false, (Object)oMissing, (Object)oMissing);
excelApp.Quit();

This tutorial will discuss the method to write data to an Excel file in C#.

Write Data to an Excel File With the Microsoft.Office.Interop.Excel Namespace in C#

The Microsoft.Office.Interop.Excel namespace provides methods for interacting with the Microsoft Excel application in C#. We can create new Excel sheets, display data of existing sheets, modify the existing Excel sheets’ contents, etc., with this namespace. The following code example shows us how to write our data to an Excel file with the Microsoft.Office.Interop.Excel namespace in C#. We need to add a reference to the Microsoft.Office.Interop.Excel namespace from the solution explorer for this approach to work.

using System;
using Excel = Microsoft.Office.Interop.Excel;
namespace write_to_excel
{
    class Program
    {
        static void writeToExcel()
        {
            
            Excel.Application myexcelApplication = new Excel.Application();
            if (myexcelApplication != null)
            {
                Excel.Workbook myexcelWorkbook = myexcelApplication.Workbooks.Add();
                Excel.Worksheet myexcelWorksheet = (Excel.Worksheet)myexcelWorkbook.Sheets.Add();

                myexcelWorksheet.Cells[1, 1] = "Value 1";
                myexcelWorksheet.Cells[2, 1] = "Value 2";
                myexcelWorksheet.Cells[3, 1] = "Value 3";

                myexcelApplication.ActiveWorkbook.SaveAs(@"C:abc.xls", Excel.XlFileFormat.xlWorkbookNormal);

                myexcelWorkbook.Close();
                myexcelApplication.Quit();
            }
        }
        static void Main(string[] args)
        {
            writeToExcel();
        }
    }
}

In the above code, we first initialized an instance of the Excel.Application class myExcelApplication. We then initialized the instance myExcelWorkbook of the Excel.Workbook class and added a workbook to our myExcelApplication with the myExcelApplication.Workbooks.Add() function. After that, we initialized the instance myExcelWorksheet of the Excel.Worksheet class and added an excel worksheet to our workbook with the myExcelWorkbook.Sheets.Add() function.

We then inserted data into the cells inside the myExcelWroksheet with the myExcelWorksheet.Cells[1, 1] = "Value 1". Here, the first index, 1, is the row index, and the second index, 1, is the column index. The Excel file was saved by the myExcelApplication.ActiveWorkbook.SaveAs(path, format) function. In the end, after inserting all the data inside the cells and saving our Excel file, we closed our workbook with myExcelWorkbook.Close() and exited our application with myExcelApp.Quit() functions in C#.

Related Article — Csharp Excel

• Export DataTable to Excel in C#
• Export Data to an Excel File Using C#
• Create Excel File in C#
• Read XLSX File in C#