抄的两个前辈的代码，反正是实现了
https://www.cnblogs.com/IT-Ramon/p/13100039.html
https://www.cnblogs.com/zhaocici/p/16434320.html
合并了两个代码的功能，反正能用
他们是在web上用，我是在桌面程序上用，小改一下就可以用了
点击查看代码
using ICSharpCode.SharpZipLib.Zip;
//using Microsoft.AspNetCore.Mvc;
using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using System.Collections.Generic;
using System;
using System.Data;
using System.Data.Entity.Core.Common.CommandTrees.ExpressionBuilder;
using System.IO;
using System.Runtime.InteropServices;
using System.Xml;
using System.Linq;
using NPOI.OpenXmlFormats.Dml.Diagram;
using System.Windows.Forms;
using System.Threading.Tasks;
using NPOI.SS.Formula.Functions;
namespace ExcelOption.Controllers
{
//[ApiController]
//[Route("[controller]")]
public class ImportExcelController
{
//private readonly Microsoft.AspNetCore.Hosting.IHostingEnvironment _hostingEnvironment;
//public ImportExcelController(Microsoft.AspNetCore.Hosting.IHostingEnvironment hostingEnvironment)
//{
// _hostingEnvironment = hostingEnvironment;
//}
//[HttpGet(Name = "dele")]
public bool dele()
{
string zipFileName = "filezip" + ".zip";
string xlsxFileName = "filexlsx" + ".xlsx";
var mapPath = Path.Combine(Application.StartupPath, "img");
//业务逻辑处理完了就把原来的文件和解压的文件夹删除
Directory.Delete(mapPath + @"\" + "filezip", true);
System.IO.File.Delete(mapPath + @"\" + xlsxFileName);
//File.Delete(mapPath + "\\" + xlsxFileName);
System.IO.File.Delete(mapPath + @"\" + zipFileName);
return true;
}
//[HttpPost(Name = "ImportExcel_Img")]
public void ImportExcel_Img(string filename)
{
// if (files.Count > 0)
{
var file = new FileStream(filename, FileMode.Open, FileAccess.Read);
//读取导入的文件类型
var fileExt = Path.GetExtension(filename).ToLower();
if (!fileExt.Equals(".xlsx"))
{
//提示文件类型不正确
// return false;
}
//转换保存zip
string zipFileName = "filezip" + ".zip";
string xlsxFileName = "filexlsx" + ".xlsx";
var mapPath = Path.Combine(Application.StartupPath, "imgs\\");
//保存xlsx到目录下
if (!Directory.Exists(mapPath)) { Directory.CreateDirectory(mapPath); }
//判断文件是否存在
if (File.Exists(mapPath + xlsxFileName)) { File.Delete(mapPath + xlsxFileName); }
Task.Run(() => File.Copy(filename, mapPath + xlsxFileName));
//using (var stream = new FileStream(mapPath + xlsxFileName, FileMode.OpenOrCreate, FileAccess.ReadWrite))
//{
// await file.CopyToAsync(stream);
//}
//保存zip到服务器
//查看文件是否存在
if (File.Exists(mapPath + zipFileName)) { File.Delete(mapPath + zipFileName); }
Task.Run(() => File.Copy(filename, mapPath + zipFileName));
//using (var stream = new FileStream(mapPath + zipFileName, FileMode.OpenOrCreate, FileAccess.ReadWrite))
//{
// await file.CopyToAsync(stream);
//}
var dt = ExcelHelper.ExcelToDataTable(mapPath + xlsxFileName);
if (dt == null) { return; }
foreach (DataRow row in dt.Rows.Cast<DataRow>().ToList())
{
//判断行是否为空
if (IsRowEmpty(row))
{
dt.Rows.Remove(row);
}
}
//解压，如果解压成功则根据xml处理 (应为方便我就放在ExcelHelper里面了)
if (UnZipFile(mapPath + zipFileName, out string path))
{
//excel 图片信息
List<o_ExcelImgModel> o_ExcelImgModelList = new List<o_ExcelImgModel>();
List<o_ExcelImgModel> o_ExcelImgModelListFloat = new List<o_ExcelImgModel>();
//图片路径文件夹
var mediaFolderPath = path + @"xl\media";
//判断是否存在此文件夹如果有则处理（如果没有图片他是不会有这个文件夹的）
if (System.IO.Directory.Exists(mediaFolderPath))
{
//解压成功获取xml 节点做处理
var exclNode = GetXmlExclNodeList(path);
var pictNode = GetXmlPictNodeList(path);
var exclNodefloat = GetXmlExclNodeListFloat(path);
var pictNodefloat = GetXmlPictNodeListFloat(path);
//获取嵌入图片信息与地址
foreach (var nl in exclNode)
{
XmlElement sondNode = (XmlElement)nl;
XmlNodeList descendDodeList = sondNode.ChildNodes;
XmlNodeList picNodeList = descendDodeList[0].ChildNodes;
XmlNodeList nvPicPrNodeList = picNodeList[0].ChildNodes;
XmlElement cNvPrElement = (XmlElement)nvPicPrNodeList.Item(0);
string name = cNvPrElement.GetAttribute("name").ToString();
XmlNodeList blipFillNodeList = picNodeList[1].ChildNodes;
XmlElement picElement = (XmlElement)blipFillNodeList.Item(0);
string id = picElement.GetAttribute("r:embed").ToString();
foreach (XmlNode xn in pictNode)
{
XmlElement xe = (XmlElement)xn;
if (xe.GetAttribute("Id").ToString() == id)
{
var pathOfPicture = xe.GetAttribute("Target").ToString().Replace("..", "").Replace("/", @"\");
pathOfPicture = path + @"xl\" + pathOfPicture;
o_ExcelImgModelList.Add(new o_ExcelImgModel()
{
ID = id,
Name = name,
PathOfPicture = pathOfPicture
});
break;
}
}
}
//图片对应dt的哪一列，存到dt然后再循环dt去处理（这个是小编的思维，如果有更好的做法可以随缘发挥）
foreach (var item in o_ExcelImgModelList)
{
//item.PathOfPicture 图片路径取到了，此时你可以存储了
Console.WriteLine(item.PathOfPicture);
}
//获取悬浮图片信息与地址
foreach (var nl in exclNodefloat)
{
XmlElement sondNode = (XmlElement)nl;
XmlNodeList descendDodeList = sondNode.ChildNodes;
XmlNodeList fromNodeList = descendDodeList[0].ChildNodes;
//取得行号
var row = Convert.ToInt32(fromNodeList.Item(2).InnerText.Trim());
var col = Convert.ToInt32(fromNodeList.Item(0).InnerText.Trim());
XmlNodeList picNodeList = descendDodeList[2].ChildNodes;
XmlNodeList blipFillNodeList = picNodeList[1].ChildNodes;
XmlElement picElement = (XmlElement)blipFillNodeList.Item(0);
string id = picElement.GetAttribute("r:embed").ToString();
foreach (XmlNode xn in pictNodefloat)
{
XmlElement xe = (XmlElement)xn;
if (xe.GetAttribute("Id").ToString() == id)
{
var pathOfPicture = xe.GetAttribute("Target").ToString().Replace("..", "").Replace("/", @"\");
pathOfPicture = path + "\\xl" + pathOfPicture;
o_ExcelImgModelListFloat.Add(new o_ExcelImgModel()
{
ID = id,
Col = col,
Row = row,
PathOfPicture = pathOfPicture
});
break;
}
}
}
//图片对应dt的哪一列，存到dt然后再循环dt去处理（这个是小编的思维，如果有更好的做法可以随缘发挥）
foreach (var item in o_ExcelImgModelListFloat)
{
dt.Rows[item.Row - 1][item.Col] += string.IsNullOrWhiteSpace(dt.Rows[item.Row - 1][item.Col].ToString()) ? item.PathOfPicture : "," + item.PathOfPicture;
}
}
//现在dt某一列存放了图片的绝对路径就可以通过table去处理了
//循环表插入数据及上传
foreach (DataRow item in dt.Rows)
{
//此时你excel转换的 dataTable表的图片字段的 值是："_xlfn.DISPIMG(\"ID_CD49305586E940EF8F78CD3B54A4BCD3\",1)"
Console.WriteLine(item["fbanum"].ToString()); //"zhao1"
//var kkl= item["IMG"].ToString(); // "_xlfn.DISPIMG(\"ID_CD49305586E940EF8F78CD3B54A4BCD3\",1)"
Console.WriteLine(item["图片"].ToString());
var itmevalue = item["图片"].ToString();
if (itmevalue.Contains("_xlfn")) {
var breakApart = item["图片"].ToString().Split('\\', '"')[1];
var imgPath = o_ExcelImgModelList.FirstOrDefault(x => x.Name == breakApart);
item["图片"] = imgPath.PathOfPicture;
//dt.Rows[]
}
//获取图片然后做上传逻辑，这个自己实现我就不多讲了
}
}
else
{
//解压时报直接返回，这个返回啥类型或者啥数据自己定义就好我这边demo 随缘来个bool意思下
// return false;
}
foreach (DataRow item in dt.Rows) {
Console.WriteLine(item["图片"].ToString());
}
//业务逻辑处理完了就把原来的文件和解压的文件夹删除
Directory.Delete(mapPath + "\\" + "filezip", true);
System.IO.File.Delete(mapPath + "\\" + xlsxFileName);
//File.Delete(mapPath + "\\" + xlsxFileName);
System.IO.File.Delete(mapPath + "\\" + zipFileName);
}
// return true;
}
bool IsRowEmpty(DataRow row)
{
foreach (var item in row.ItemArray)
{
if (!string.IsNullOrEmpty(item.ToString()))
{
return false; // 只要有一个列不为空，就不是空行
}
}
return true; // 所有列都为空，是空行
}
public static string MidStrEx(string sourse, string startstr, string endstr)
{
string result = string.Empty;
int startindex, endindex;
try
{
startindex = sourse.IndexOf(startstr);
if (startindex == -1)
return result;
string tmpstr = sourse.Substring(startindex + startstr.Length);
endindex = tmpstr.IndexOf(endstr);
if (endindex == -1)
return result;
result = tmpstr.Remove(endindex);
}
catch (Exception ex)
{
Console.Write("MidStrEx Err:" + ex.Message);
}
return result;
}
/// <summary>
/// Xml图片表格位置及路径ID
/// </summary>
private const string _XmlExcel = @"xl\cellimages.xml";
/// <summary>
/// Xml图片路径
/// </summary>
private const string _XmlPict = @"xl\_rels\cellimages.xml.rels";
/// <summary>
/// Xml图片表格位置及路径ID
/// </summary>
private const string _XmlExcelfloat = @"\xl\drawings\drawing1.xml";
/// <summary>
/// Xml图片路径
/// </summary>
private const string _XmlPictfloat = @"\xl\drawings\_rels\drawing1.xml.rels";
/// <summary>
/// 获取图片路径 Xml节点
/// </summary>
/// <param name="path">解压后的文件夹路径</param>
/// <returns></returns>
private XmlNodeList GetXmlPictNodeList(string path)
{
XmlDocument doc = new XmlDocument();
if (File.Exists(path + _XmlPict)) {
doc.Load(path + _XmlPict);
XmlNode root = doc.DocumentElement;
return root.ChildNodes;
}
return null;
}
private XmlNodeList GetXmlPictNodeListFloat(string path)
{
XmlDocument doc = new XmlDocument();
if (File.Exists(path + _XmlPictfloat)) {
doc.Load(path + _XmlPictfloat);
XmlNode root = doc.DocumentElement;
return root.ChildNodes;
}
return null;
}
/// <summary>
/// 获取图片表格位置及路径ID Xml节点
/// </summary>
/// <param name="path">解压后的文件夹路径</param>
/// <returns></returns>
private XmlNodeList GetXmlExclNodeList(string path)
{
XmlDocument doc = new XmlDocument();
if (File.Exists(path + _XmlExcel)) {
doc.Load(path + _XmlExcel);
XmlNode root = doc.DocumentElement;
return root.ChildNodes;
}
return null;
}
private XmlNodeList GetXmlExclNodeListFloat(string path)
{
XmlDocument doc = new XmlDocument();
if (File.Exists(path + _XmlExcelfloat))
{
doc.Load(path + _XmlExcelfloat);
XmlNode root = doc.DocumentElement;
return root.ChildNodes;
}
return null;
}
/// <summary>
/// 解压文件
/// </summary>
/// <param name="zipFilePath">压缩文件路径</param>
/// <param name="path">返回压缩文件夹路径</param>
/// <param name="unZipDir">解压文件存放路径,为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹</param>
/// <returns></returns>
private bool UnZipFile(string zipFilePath, out string path, string unZipDir = null)
{
if (zipFilePath == string.Empty)
{
path = null;
return false;
}
if (!System.IO.File.Exists(zipFilePath))
{
path = null;
return false;
}
//解压文件夹为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹
if (string.IsNullOrWhiteSpace(unZipDir))
unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));
if (!unZipDir.EndsWith("\\"))
unZipDir += "\\";
if (!Directory.Exists(unZipDir))
Directory.CreateDirectory(unZipDir);
try
{
using (ZipInputStream s = new ZipInputStream(System.IO.File.OpenRead(zipFilePath)))
{
ZipEntry theEntry;
while ((theEntry = s.GetNextEntry()) != null)
{
string directoryName = Path.GetDirectoryName(theEntry.Name);
string fileName = Path.GetFileName(theEntry.Name);
if (directoryName.Length > 0)
{
Directory.CreateDirectory(unZipDir + directoryName);
}
if (!directoryName.EndsWith("\\"))
directoryName += "\\";
if (fileName != String.Empty)
{
using (FileStream streamWriter = System.IO.File.Create(unZipDir + theEntry.Name))
{
int size = 2048;
byte[] data = new byte[2048];
while (true)
{
size = s.Read(data, 0, data.Length);
if (size > 0)
{
streamWriter.Write(data, 0, size);
}
else
{
break;
}
}
}
}
}
}
}
catch
{
path = null;
return false;
}
path = unZipDir;
return true;
}
}
/// <summary>
/// excel 图片信息
/// </summary>
public class o_ExcelImgModel
{
/// <summary>
/// ID
/// </summary>
public string ID { get; set; }
/// <summary>
/// 上传图片生成的id
/// </summary>
public string Name { get; set; }
/// <summary>
/// 行
/// </summary>
public int Row { get; set; }
/// <summary>
/// 单元格
/// </summary>
public int Col { get; set; }
/// <summary>
/// 图片文件绝对路径
/// </summary>
public string PathOfPicture { get; set; }
}
public class ExcelHelper
{
private static IWorkbook workbook = null;
private static FileStream fs = null;
/// <summary>
/// 将excel中的数据导入到DataTable中
/// </summary>
/// <param name="fileName">excel文件路径</param>
/// <param name="sheetName">excel工作薄sheet的名称</param>
/// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param>
/// <returns>返回的DataTable</returns>
public static DataTable ExcelToDataTable(string fileName, string sheetName = null, bool isFirstRowColumn = true)
{
ISheet sheet = null;
DataTable data = new DataTable();
int startRow = 0;
try
{
fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
workbook = new XSSFWorkbook(fs);
else if (fileName.IndexOf(".xls") > 0) // 2003版本
workbook = new HSSFWorkbook(fs);
if (sheetName != null)
{
sheet = workbook.GetSheet(sheetName);
if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
{
sheet = workbook.GetSheetAt(0);
}
}
else
{
sheet = workbook.GetSheetAt(0);
}
if (sheet != null)
{
IRow firstRow = sheet.GetRow(0);
int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数
if (isFirstRowColumn)
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
ICell cell = firstRow.GetCell(i);
if (cell != null)
{
string cellValue = cell.StringCellValue;
if (cellValue != null)
{
DataColumn column = new DataColumn(cellValue);
data.Columns.Add(column);
}
}
}
startRow = sheet.FirstRowNum + 1;
}
else
{
for (int i = firstRow.FirstCellNum; i < cellCount; i++)
{
DataColumn column = new DataColumn(i.ToString());
data.Columns.Add(column);
}
startRow = sheet.FirstRowNum;
}
//最后一列的标号
int rowCount = sheet.LastRowNum;
for (int i = startRow; i <= rowCount; ++i)
{
IRow row = sheet.GetRow(i);
if (row == null) continue; //没有数据的行默认是null
Console.WriteLine("第 " + i + " 行");
DataRow dataRow = data.NewRow();
if (row.FirstCellNum >= 0) {
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
dataRow[j] = row.GetCell(j).ToString();
Console.WriteLine("第" + j + "列");
}
data.Rows.Add(dataRow);
}
}
}
return data;
}
catch (Exception ex)
{
Console.WriteLine("Exception: " + ex.Message);
return null;
}
}
}
}