ExcelHelper.cs
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using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using OfficeOpenXml;
using OfficeOpenXml.Style;
using System;
using System.Collections.Generic;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Web;
namespace Infrastructure
{
public class ExcelHelper
{
private IHostingEnvironment _hostingEnvironment;
public static string ExcelContentType
{
get
{
return "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
}
}
public ExcelHelper(IHostingEnvironment hostingEnvironment)
{
_hostingEnvironment = hostingEnvironment;
}
private ExcelHelper() { }
/// <summary>
/// Excel文件 Content-Type
/// </summary>
private const string Excel = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
/// <summary>
/// Excel导出
/// </summary>
/// <param name="keyValuePairs">字典表【名称，数据】</param>
/// <param name="sWebRootFolder">网站根文件夹</param>
/// <param name="tuple">item1:The virtual path of the file to be returned.|item2:The Content-Type of the file</param>
public static string Export(Dictionary<string, DataTable> keyValuePairs, out Tuple<string, string> tuple)
{
ExcelHelper excle = new ExcelHelper();
string sWebRootFolder = @"wwwroot\ExportData\";
if (string.IsNullOrWhiteSpace(sWebRootFolder))
tuple = Tuple.Create("", Excel);
string sFileName = $"{DateTime.Now.ToString("yyyyMMddHHmmssfff")}-{Guid.NewGuid()}.xlsx";
FileInfo file = new FileInfo(Path.Combine(sWebRootFolder, sFileName));
using (ExcelPackage package = new ExcelPackage(file))
{
foreach (var item in keyValuePairs)
{
string worksheetTitle = item.Key; //表名称
var dt = item.Value; //数据表
// 添加worksheet
ExcelWorksheet worksheet = package.Workbook.Worksheets.Add(worksheetTitle);
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
if (i == 0)
{
//添加表头
worksheet.Cells[i + 1, j + 1].Value = dt.Columns[j].ColumnName;
worksheet.Cells[i + 1, j + 1].Style.Font.Bold = true;
//添加值
worksheet.Cells[i + 2, j + 1].Value = dt.Rows[i][j].ToString();
}
else
{
//添加值
worksheet.Cells[i + 2, j + 1].Value = dt.Rows[i][j].ToString();
}
}
}
}
package.Save();
}
tuple = Tuple.Create(sFileName, Excel);
return sFileName;
}
private Tuple<string, string> GetTuple()
{
//string sWebRootFolder = @"wwwroot\";
string sWebRootFolder = _hostingEnvironment.WebRootPath;
string sFileName = $"{DateTime.Now.ToString("yyyyMMddHHmmssfff")}-{Guid.NewGuid()}.xlsx";
return Tuple.Create(sWebRootFolder, sFileName);
}
public List<T> ConvertToModel<T>(IFormFile excelfile, Dictionary<int, string> ExcelMap = null) where T : new()
{
string sWebRootFolder = GetTuple().Item1;
string sFileName = GetTuple().Item2;
FileInfo file = new FileInfo(Path.Combine(sWebRootFolder, sFileName));
string filePath = Path.Combine(sWebRootFolder, sFileName);
// 定义集合
List<T> ts = new List<T>();
string tempName = "";
DataTable dt = new DataTable();
string fileExt = Path.GetExtension(filePath).ToLower();
using (FileStream fs = new FileStream(file.ToString(), FileMode.Create))
{
excelfile.CopyTo(fs);
fs.Flush();
}
int No = 0;
string sErrorMsg = "";
bool tempFlag = false;
using (ExcelPackage package = new ExcelPackage(file))
{
ExcelWorksheet worksheet = package.Workbook.Worksheets[1];
int rowCount = worksheet.Dimension.Rows;
int ColCount = worksheet.Dimension.Columns;
bool bHeaderRow = false;
for (int j = 1; j <= ColCount; j++)
{
dt.Columns.Add(worksheet.Cells[1, j].Value.ToString());
}
for (int row = 1; row <= rowCount; row++)
{
DataRow dr = dt.NewRow();
for (int col = 1; col <= ColCount; col++)
{
if (bHeaderRow)
{
dr[col - 1] = worksheet.Cells[row, col].Value.ToString();
}
else if (worksheet.Cells[row, col].Value == null)
{
dr[col - 1] = null;
}
else
{
dr[col - 1] = worksheet.Cells[row, col].Value.ToString();
}
}
dt.Rows.Add(dr);
}
dt.Rows.RemoveAt(0);
if (ExcelMap != null)
{
foreach (var item in ExcelMap)
{
int key = item.Key;
string value = item.Value;
dt.Columns[key - 1].ColumnName = value;
}
}
T t = new T();
// 获得此模型的公共属性
PropertyInfo[] propertys = t.GetType().GetProperties();
string propertysName = "";
foreach (PropertyInfo pi in propertys)
{
propertysName = pi.Name;
Type p = pi.PropertyType;
if (dt.Columns.Contains(propertysName))
{
tempFlag = true;
}
}
}
try
{
File.Delete(filePath);
}
catch (Exception)
{
}
try
{
if (tempFlag)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
No = i;
T t = new T();
object value = null;
// 获得此模型的公共属性
PropertyInfo[] propertys = t.GetType().GetProperties();
foreach (PropertyInfo pi in propertys)
{
tempName = pi.Name;
Type p = pi.PropertyType;
if (dt.Columns.Contains(tempName))
{
// 判断此属性是否有Setter
if (!pi.CanWrite) continue;
Type[] Type = p.GetGenericArguments();
string row = dt.Rows[i][tempName].ToString().Trim();
if (row != "")
{
if (Type.Count() > 0)
{
value = Convert.ChangeType(row, Type[0]);
}
else
{
value = Convert.ChangeType(row, p);
}
if (value != DBNull.Value)
{
pi.SetValue(t, value, null);
}
}
else
{
if (dt.Rows[0][tempName].ToString().EndsWith("(必填项)"))
{
sErrorMsg += (sErrorMsg.Equals(string.Empty) ? "导入失败<br>" : "") + "第" + (i + 2) + "行:字段:[" + dt.Rows[0][tempName].ToString().Replace("(必填项)", "") + "] 为必填项<br>";
}
}
}
}
ts.Add(t);
}
}
}
catch (Exception ex)
{
LogHelper.Log(ex.ToString());
throw new Exception("EXCEL数据加载错误: 第" + (No + 2) + "行" + " 字段:[" + tempName + "] 数据不正确");
}
if (ts.Count == 0)
{
if (!tempFlag)
{
throw new Exception("EXCEL数据加载错误, 请使用下载模板功能来生成数据模板!");
}
if (dt.Rows.Count == 1)
{
throw new Exception("EXCEL数据加载错误, 请确认EXCEL中是否有填充数据!");
}
}
if (!sErrorMsg.Equals(string.Empty))
{
throw new Exception(sErrorMsg);
}
file.Delete();
return ts;
}
public static byte[] ExportByEPPlus(DataTable sourceTable/*, string strFileName*/)
{
byte[] reslut = null;
using (ExcelPackage pck = new ExcelPackage())
{
//Create the worksheet
string sheetName = string.IsNullOrEmpty(sourceTable.TableName) ? "Sheet1" : sourceTable.TableName;
ExcelWorksheet ws = pck.Workbook.Worksheets.Add(sheetName);
//Load the datatable into the sheet, starting from cell A1. Print the column names on row 1
ws.Cells["A1"].LoadFromDataTable(sourceTable, true);
//Format the row
ExcelBorderStyle borderStyle = ExcelBorderStyle.Thin;
Color borderColor = Color.FromArgb(155, 155, 155);
using (ExcelRange rng = ws.Cells[1, 1, sourceTable.Rows.Count + 1, sourceTable.Columns.Count])
{
rng.Style.Font.Name = "宋体";
rng.Style.Font.Size = 10;
rng.Style.Fill.PatternType = ExcelFillStyle.Solid; //Set Pattern for the background to Solid
rng.Style.Fill.BackgroundColor.SetColor(Color.FromArgb(255, 255, 255));
rng.Style.Border.Top.Style = borderStyle;
rng.Style.Border.Top.Color.SetColor(borderColor);
rng.Style.Border.Bottom.Style = borderStyle;
rng.Style.Border.Bottom.Color.SetColor(borderColor);
rng.Style.Border.Right.Style = borderStyle;
rng.Style.Border.Right.Color.SetColor(borderColor);
}
//Format the header row
using (ExcelRange rng = ws.Cells[1, 1, 1, sourceTable.Columns.Count])
{
rng.Style.Font.Bold = true;
rng.Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
rng.Style.Fill.BackgroundColor.SetColor(Color.FromArgb(234, 241, 246)); //Set color to dark blue
rng.Style.Font.Color.SetColor(Color.FromArgb(51, 51, 51));
}
////Write it back to the client
//HttpContext.Current.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
// HttpContext.Current.Response.AddHeader("content-disposition", string.Format("attachment; filename={0}.xlsx", HttpUtility.UrlEncode(strFileName, Encoding.UTF8)));
// HttpContext.Current.Response.ContentEncoding = Encoding.UTF8;
reslut = pck.GetAsByteArray();
return reslut;
}
}
}
}