.net mvc中epplus导出excel

帮助类

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.Web;

namespace EpPlus.Demo.Models
{
    public class EpPlusHelper
    {
        ExcelPackage package;
        ExcelWorksheet worksheet;

        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="sheetName"></param>
        /// <param name="path"></param>
        public EpPlusHelper(string sheetName = "", string path = "")
        {
            try
            {
                if (!string.IsNullOrEmpty(path))
                {
                    package = new ExcelPackage(new FileInfo(path));
                }
                else
                {
                    package = new ExcelPackage();
                }

                if (package.Workbook.Worksheets.Count > 0)
                {
                    worksheet = package.Workbook.Worksheets[0];
                }
                else
                {
                    CreateSheet(DateTime.Now.ToString("yyyyMMdd"));
                }

                if (!string.IsNullOrWhiteSpace(sheetName))
                {
                    worksheet.Name = sheetName;
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 创建工作薄
        /// </summary>
        /// <param name="sheetName"></param>
        public void CreateSheet(string sheetName)
        {
            try
            {
                worksheet = package.Workbook.Worksheets.Add(sheetName);//创建worksheet
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 切换工作薄
        /// </summary>
        /// <param name="index"></param>
        public void ChangeSheet(int index)
        {
            try
            {
                worksheet = package.Workbook.Worksheets[index];
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 切换工作簿
        /// </summary>
        /// <param name="sheetName"></param>
        public void ChangeSheet(string sheetName)
        {
            try
            {
                worksheet = package.Workbook.Worksheets[sheetName];
            }
            catch (Exception ex)
            {
                throw ex;

            }
        }

        /// <summary>
        /// 保存excel
        /// </summary>
        /// <param name="password"></param>
        public void SaveExcel(HttpResponseBase response, string excelName)
        {
            try
            {
                if (package != null)
                {
                    if (!string.IsNullOrEmpty(excelName))
                    {
                        //package.Save();
                        //package.SaveAs();
                        response.BinaryWrite(package.GetAsByteArray());
                        response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
                        response.AddHeader("content-disposition", "attachment;  filename=" + excelName + ".xlsx");
                    }
                    else
                    {
                        response.BinaryWrite(package.GetAsByteArray());
                        response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
                        response.AddHeader("content-disposition", "attachment;  filename=" + (DateTime.Now.ToString("yyyyMMddHHmmss")) + ".xlsx");
                    }
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 通过索引赋值，索引从1开始
        /// </summary>
        /// <param name="x">行</param>
        /// <param name="y">列</param>
        /// <param name="value"></param>
        public void SetValue(int x, int y, string value)
        {
            worksheet.Cells[x, y].Value = value;//直接指定行列数进行赋值
        }

        /// <summary>
        /// 单元格赋值
        /// </summary>
        /// <param name="cell">单元格，如：A1</param>
        /// <param name="value"></param>
        public void SetValue(string cell, string value)
        {
            worksheet.Cells[cell].Value = value;//直接指定单元格进行赋值
        }

        /// <summary>
        /// 设置样式
        /// </summary>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <param name="isWrapText">是否换行</param>
        /// <param name="horizontal">水平格式</param>
        /// <param name="vertical">垂直格式</param>
        /// <param name="isBold">是否粗体</param>
        /// <param name="size">文字大小</param>
        /// <param name="height">行高</param>
        /// <param name="isShowGridLines">是否显示网格线</param>
        public void SetStyle(int x, int y, bool isWrapText = true, ExcelHorizontalAlignment horizontal = ExcelHorizontalAlignment.Center, ExcelVerticalAlignment vertical = ExcelVerticalAlignment.Center, bool isBold = false, int size = 12, int height = 15, bool isShowGridLines = false)
        {
            //worksheet.Cells[x, y].Style.Numberformat.Format = "#,##0.00";//这是保留两位小数

            worksheet.Cells[x, y].Style.HorizontalAlignment = horizontal;//水平居中
            worksheet.Cells[x, y].Style.VerticalAlignment = vertical;//垂直居中
            //worksheet.Cells[1, 4, 1, 5].Merge = true;//合并单元格
            worksheet.Cells.Style.WrapText = isWrapText;//自动换行

            worksheet.Cells[x, y].Style.Font.Bold = isBold;//字体为粗体
            //worksheet.Cells[1, 1].Style.Font.Color.SetColor(Color.White);//字体颜色
            //worksheet.Cells[1, 1].Style.Font.Name = "微软雅黑";//字体
            worksheet.Cells[x, y].Style.Font.Size = size;//字体大小

            //worksheet.Cells[1, 1].Style.Fill.PatternType = ExcelFillStyle.Solid;
            //worksheet.Cells[1, 1].Style.Fill.BackgroundColor.SetColor(Color.FromArgb(128, 128, 128));//设置单元格背景色

            worksheet.Cells[x, y].Style.Border.BorderAround(ExcelBorderStyle.Thin, Color.FromArgb(191, 191, 191));//设置单元格所有边框
            worksheet.Cells[x, y].Style.Border.Bottom.Style = ExcelBorderStyle.Thin;//单独设置单元格底部边框样式和颜色（上下左右均可分开设置）
            worksheet.Cells[x, y].Style.Border.Bottom.Color.SetColor(Color.FromArgb(191, 191, 191));

            //worksheet.Cells.Style.ShrinkToFit = true;//单元格自动适应大小
            worksheet.Row(x).Height = height;//设置行高
            //worksheet.Row(1).CustomHeight = true;//自动调整行高
            //worksheet.Column(1).Width = 15;//设置列宽

            worksheet.View.ShowGridLines = isShowGridLines;//去掉sheet的网格线
            //worksheet.Cells.Style.Fill.PatternType = ExcelFillStyle.Solid;
            //worksheet.Cells.Style.Fill.BackgroundColor.SetColor(Color.LightGray);//设置背景色
            //worksheet.BackgroundImage.Image = Image.FromFile(@"firstbg.jpg");//设置背景图片
        }

        public void SetMergeCell(int x1, int y1, int x2, int y2)
        {
            worksheet.Cells[x1, y1, x2, y2].Merge = true;//合并单元格
        }

        public void TableToExcel(DataTable dt, string title)
        {
            DataColumnCollection columns = dt.Columns;

            int addIndex = 1;

            //表格标题
            if (!string.IsNullOrEmpty(title))
            {
                addIndex = 2;
                SetMergeCell(1, 1, 1, columns.Count);
                SetStyle(1, 1, false, ExcelHorizontalAlignment.Center, ExcelVerticalAlignment.Center, true, 16, 25);
                //worksheet.Cells.Merge(1, 1, 1, columns.Count);
                SetValue(1, 1, title);
            }

            //表头
            if (columns.Count > 0)
            {
                int columnIndex = 1;

                foreach (DataColumn dc in columns)
                {
                    SetStyle(addIndex, columnIndex);
                    SetValue(addIndex, columnIndex, dc.ColumnName);
                    columnIndex += 1;
                }
            }

            //数据
            if (dt.Rows.Count > 0)
            {
                int rowIndex = 1 + addIndex;

                foreach (DataRow dr in dt.Rows)
                {
                    for (int i = 0; i < columns.Count; i++)
                    {
                        SetStyle(rowIndex, i + 1);
                        SetValue(rowIndex, i + 1, dr[i].ToString());
                    }

                    rowIndex += 1;
                }
            }
        }
    }
}

　　demo

public void ExcelDemo02()
        {
            EpPlusHelper ep = new EpPlusHelper(Server.MapPath("/ExcelModel/model.xlsx"));

            ep.SetValue(3, 2, "龙富工业区");
            ep.SetValue(3, 4, "2018.6.1 0:00-2018.6.30 24:00");

            DataTable dt = new DataTable();

            dt.Columns.Add("ID", typeof(string));
            dt.Columns.Add("Address", typeof(string));
            dt.Columns.Add("平台", typeof(string));
            dt.Columns.Add("DeviceType", typeof(string));
            dt.Columns.Add("DeviceStatus", typeof(string));
            dt.Columns.Add("Count", typeof(string));
            dt.Columns.Add("Remark", typeof(string));

            for (int i = 1; i < 10; i++)
            {
                DataRow dr = dt.NewRow();

                dr["ID"] = i.ToString();
                dr["Address"] = "地址" + i.ToString();
                dr["平台"] = "平台" + i.ToString();
                dr["DeviceType"] = "类型" + i.ToString();
                dr["DeviceStatus"] = "状况" + i.ToString();
                dr["Count"] = i.ToString();
                dr["Remark"] = "备注" + i.ToString();

                dt.Rows.Add(dr);
            }

            int index = 6;

            foreach (DataRow dr in dt.Rows)
            {
                ep.SetValue(index, 1, Convert.ToString(dr["ID"]));
                ep.SetStyle(index, 1);

                ep.SetValue(index, 2, Convert.ToString(dr["Address"]));
                ep.SetStyle(index, 2);

                ep.SetValue(index, 3, Convert.ToString(dr["平台"]));
                ep.SetStyle(index, 3);

                ep.SetValue(index, 4, Convert.ToString(dr["DeviceType"]));
                ep.SetStyle(index, 4);

                ep.SetValue(index, 5, Convert.ToString(dr["DeviceStatus"]));
                ep.SetStyle(index, 5);

                ep.SetValue(index, 6, Convert.ToString(dr["Count"]));
                ep.SetStyle(index, 6);

                ep.SetValue(index, 7, Convert.ToString(dr["Remark"]));
                ep.SetStyle(index, 7);

                index++;
            }

            ep.SaveExcel(Response,"自定义名称");
        }