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c#操作excel表格有很多方法，本文介绍的是基于Interop.Excel方式。该方式并不是winform操作excel的最好方法，本文介绍该方法主要是为一些仍有需求的小伙伴。建议有兴趣的小伙伴可以看一下miniexcel，该方法更简洁高效。
一、首先需要下载interop.excel库，在“管理NuGET程序包中下载
二、包含头文件
using Excel = Microsoft.Office.Interop.Excel;三、操作excel
本文把相关读写excel封装成函数，具体如下：
1、往某个单元格写入数据
public bool WriteToCell(string openAddr,string sheet,int row,int column,string value){try{Excel.Application excelAppWrite = null;Excel.Workbook workbookWrite = null;Excel.Worksheet worksheetWrite = null;excelAppWrite = new Excel.Application();workbookWrite = excelAppWrite.Workbooks.Open(openAddr);worksheetWrite = workbookWrite.Sheets[sheet];Excel.Range xlRange = worksheetWrite.UsedRange;xlRange.Cells[row, column] = value;// 关闭工作簿并退出Excel应用程序workbookWrite.Close(true);excelAppWrite.Quit();System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheetWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(excelAppWrite);worksheetWrite = null;workbookWrite = null;excelAppWrite = null;GC.Collect();return true;}catch (Exception ex){ return false;}}2、往excel表最后一行写入数据
public bool WriteToRow(string openAddr, string sheet,string[] valueArray){try{Excel.Application excelAppWrite = null;Excel.Workbook workbookWrite = null;Excel.Worksheet worksheetWrite = null;excelAppWrite = new Excel.Application();workbookWrite = excelAppWrite.Workbooks.Open(openAddr);worksheetWrite = workbookWrite.Sheets[sheet];Excel.Range xlRange = worksheetWrite.UsedRange;int numberOfRows = xlRange.Rows.Count;for (int i = 0; i < valueArray.Length; i++){xlRange.Cells[numberOfRows + 1, i + 1] = valueArray[i];}// 关闭工作簿并退出Excel应用程序workbookWrite.Close(true);excelAppWrite.Quit();System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheetWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(excelAppWrite);worksheetWrite = null;workbookWrite = null;excelAppWrite = null;GC.Collect();return true;}catch (Exception ex){return false;}}3、把数据库数据写入excel
public bool WriteToExcel(string openAddr, string sheet, DataTable dataTable){try{Excel.Application excelAppWrite = null;Excel.Workbook workbookWrite = null;Excel.Worksheet worksheetWrite = null;excelAppWrite = new Excel.Application();workbookWrite = excelAppWrite.Workbooks.Open(openAddr);worksheetWrite = workbookWrite.Sheets[sheet];Excel.Range xlRange = worksheetWrite.UsedRange;int numberOfRows = xlRange.Rows.Count;for (int i = 0; i < dataTable.Rows.Count; i++){DataRow dataRow = dataTable.Rows[i];for (int j = 0; j < dataTable .Columns.Count; j++){xlRange.Cells[numberOfRows + i + 1, j + 1] = dataRow[j];}}// 关闭工作簿并退出Excel应用程序workbookWrite.Close(true);excelAppWrite.Quit();System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheetWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(excelAppWrite);worksheetWrite = null;workbookWrite = null;excelAppWrite = null;GC.Collect();return true;}catch (Exception ex){return false;}}4、读取某一个单元格数据
public string ReadCell(string openAddr, string sheet, int row, int column){try{Excel.Application excelAppWrite = null;Excel.Workbook workbookWrite = null;Excel.Worksheet worksheetWrite = null;excelAppWrite = new Excel.Application();workbookWrite = excelAppWrite.Workbooks.Open(openAddr);worksheetWrite = workbookWrite.Sheets[sheet];Excel.Range xlRange = worksheetWrite.UsedRange;string cellValue = xlRange.Cells[row, column].Text.ToString();// 关闭工作簿并退出Excel应用程序workbookWrite.Close(true);excelAppWrite.Quit();System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheetWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(excelAppWrite);worksheetWrite = null;workbookWrite = null;excelAppWrite = null;GC.Collect();return cellValue;}catch (Exception ex){return "";}}5、读取最后一行数据
public List<string> ReadToRow(string openAddr, string sheet){List<string> valueArray = new List<string>();try{Excel.Application excelAppWrite = null;Excel.Workbook workbookWrite = null;Excel.Worksheet worksheetWrite = null;excelAppWrite = new Excel.Application();workbookWrite = excelAppWrite.Workbooks.Open(openAddr);worksheetWrite = workbookWrite.Sheets[sheet];Excel.Range xlRange = worksheetWrite.UsedRange;int numberOfRows = xlRange.Rows.Count;int numberOfColumn = xlRange.Columns.Count;for(int i = 0; i < numberOfColumn; i++){valueArray.Add(xlRange.Cells[numberOfRows, i + 1].Text.ToString());}// 关闭工作簿并退出Excel应用程序workbookWrite.Close(true);excelAppWrite.Quit();System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheetWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(excelAppWrite);worksheetWrite = null;workbookWrite = null;excelAppWrite = null;GC.Collect();return valueArray;}catch (Exception ex){return valueArray;}}最后给出详细代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Excel = Microsoft.Office.Interop.Excel;
using System.Data;namespace Test
{class InteropExcelHelper{//往某个单元格写入数据public bool WriteToCell(string openAddr,string sheet,int row,int column,string value){try{Excel.Application excelAppWrite = null;Excel.Workbook workbookWrite = null;Excel.Worksheet worksheetWrite = null;excelAppWrite = new Excel.Application();workbookWrite = excelAppWrite.Workbooks.Open(openAddr);worksheetWrite = workbookWrite.Sheets[sheet];Excel.Range xlRange = worksheetWrite.UsedRange;xlRange.Cells[row, column] = value;// 关闭工作簿并退出Excel应用程序workbookWrite.Close(true);excelAppWrite.Quit();System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheetWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(excelAppWrite);worksheetWrite = null;workbookWrite = null;excelAppWrite = null;GC.Collect();return true;}catch (Exception ex){ return false;}}//往最后一行写入数据public bool WriteToRow(string openAddr, string sheet,string[] valueArray){try{Excel.Application excelAppWrite = null;Excel.Workbook workbookWrite = null;Excel.Worksheet worksheetWrite = null;excelAppWrite = new Excel.Application();workbookWrite = excelAppWrite.Workbooks.Open(openAddr);worksheetWrite = workbookWrite.Sheets[sheet];Excel.Range xlRange = worksheetWrite.UsedRange;int numberOfRows = xlRange.Rows.Count;for (int i = 0; i < valueArray.Length; i++){xlRange.Cells[numberOfRows + 1, i + 1] = valueArray[i];}// 关闭工作簿并退出Excel应用程序workbookWrite.Close(true);excelAppWrite.Quit();System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheetWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(excelAppWrite);worksheetWrite = null;workbookWrite = null;excelAppWrite = null;GC.Collect();return true;}catch (Exception ex){return false;}}//把数据库数据写入工作表public bool WriteToExcel(string openAddr, string sheet, DataTable dataTable){try{Excel.Application excelAppWrite = null;Excel.Workbook workbookWrite = null;Excel.Worksheet worksheetWrite = null;excelAppWrite = new Excel.Application();workbookWrite = excelAppWrite.Workbooks.Open(openAddr);worksheetWrite = workbookWrite.Sheets[sheet];Excel.Range xlRange = worksheetWrite.UsedRange;int numberOfRows = xlRange.Rows.Count;for (int i = 0; i < dataTable.Rows.Count; i++){DataRow dataRow = dataTable.Rows[i];for (int j = 0; j < dataTable .Columns.Count; j++){xlRange.Cells[numberOfRows + i + 1, j + 1] = dataRow[j];}}// 关闭工作簿并退出Excel应用程序workbookWrite.Close(true);excelAppWrite.Quit();System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheetWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(excelAppWrite);worksheetWrite = null;workbookWrite = null;excelAppWrite = null;GC.Collect();return true;}catch (Exception ex){return false;}}//读取某一个单元格数据public string ReadCell(string openAddr, string sheet, int row, int column){try{Excel.Application excelAppWrite = null;Excel.Workbook workbookWrite = null;Excel.Worksheet worksheetWrite = null;excelAppWrite = new Excel.Application();workbookWrite = excelAppWrite.Workbooks.Open(openAddr);worksheetWrite = workbookWrite.Sheets[sheet];Excel.Range xlRange = worksheetWrite.UsedRange;string cellValue = xlRange.Cells[row, column].Text.ToString();// 关闭工作簿并退出Excel应用程序workbookWrite.Close(true);excelAppWrite.Quit();System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheetWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(excelAppWrite);worksheetWrite = null;workbookWrite = null;excelAppWrite = null;GC.Collect();return cellValue;}catch (Exception ex){return "";}}//读取最后一行数据public List<string> ReadToRow(string openAddr, string sheet){List<string> valueArray = new List<string>();try{Excel.Application excelAppWrite = null;Excel.Workbook workbookWrite = null;Excel.Worksheet worksheetWrite = null;excelAppWrite = new Excel.Application();workbookWrite = excelAppWrite.Workbooks.Open(openAddr);worksheetWrite = workbookWrite.Sheets[sheet];Excel.Range xlRange = worksheetWrite.UsedRange;int numberOfRows = xlRange.Rows.Count;int numberOfColumn = xlRange.Columns.Count;for(int i = 0; i < numberOfColumn; i++){valueArray.Add(xlRange.Cells[numberOfRows, i + 1].Text.ToString());}// 关闭工作簿并退出Excel应用程序workbookWrite.Close(true);excelAppWrite.Quit();System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheetWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookWrite);System.Runtime.InteropServices.Marshal.ReleaseComObject(excelAppWrite);worksheetWrite = null;workbookWrite = null;excelAppWrite = null;GC.Collect();return valueArray;}catch (Exception ex){return valueArray;}}}
}