解决中文文件名保存Excel乱码问题，主要是判断火狐或者IE浏览器，然后做对应的判断处理，核心代码如下：
System.Web.HttpContext.Current.Response.ContentType = "application/vnd.ms-excel"; //设置下载的Excel文件名\ if (System.Web.HttpContext.Current.Request.ServerVariables["http_user_agent"].ToString().IndexOf("Firefox") != -1) { //火狐浏览器 System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}", "=?UTF-8?B?" + Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(fileName)) + "?=")); } else { //IE等浏览器 System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}", System.Web.HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8))); }
废话不多说，直接上类库代码，ATNPOIHelper.cs：
using System; using System.Linq; using System.Web; using System.IO; using NPOI; using NPOI.SS.Util; using NPOI.HSSF.Util; using NPOI.SS.UserModel; using NPOI.HSSF.UserModel; using System.Data; using System.Collections.Generic; using System.Text; namespace AT.Utility.DotNetFile { /* 导出Excel包含的功能： 1.多表头导出最多支持到三行，表头格式说明 相邻父列头之间用'#'分隔,父列头与子列头用空格(' ‘)分隔,相邻子列头用逗号分隔(‘,') 两行：序号#分公司#组别#本日成功签约单数 预警,续约,流失,合计#累计成功签约单数 预警,续约,流失,合计#任务数#完成比例#排名 三行：等级#级别#上期结存 件数,重量,比例#本期调入 收购调入 件数,重量,比例#本期发出 车间投料 件数,重量,比例#本期发出 产品外销百分比 件数,重量,比例#平均值 三行时请注意：列头要重复 2.添加表头标题功能 3.添加序号功能 4.根据数据设置列宽 缺陷： 数据内容不能合并列合并行 改进思路： 添加一属性：设置要合并的列，为了实现多列合并可以这样设置{“列1,列2”,”列4”} */ /// <summary> /// 利用NPOI实现导出Excel /// </summary> public class ATNPOIHelper { #region 初始化 /// <summary> /// 声明 HSSFWorkbook 对象 /// </summary> private static HSSFWorkbook _workbook; /// <summary> /// 声明 HSSFSheet 对象 /// </summary> private static HSSFSheet _sheet; #endregion #region Excel导出 /// <summary> /// Excel导出 /// </summary> /// <param>文件名称 如果为空或NULL，则默认“新建Excel.xls”</param> /// <param></param> /// <param>合计：末行合计时，合并的列数</param> /// <param>导出方式 1：WEB导出（默认）2：按文件路径导出</param> /// <param>文件路径 如果WEB导出，则可以为空；如果按文件路径导出，则默认桌面路径</param> public static void Export(string fileName, IList<NPOIModel> list, int ColMergeNum, int method = 1, string filePath = null) { // 文件名称 if (!string.IsNullOrEmpty(fileName)) { if (fileName.IndexOf('.') == -1) { fileName += ".xls"; } else { fileName = fileName.Substring(1, fileName.IndexOf('.')) + ".xls"; } } else { fileName = "新建Excel.xls"; } // 文件路径 if (2 == method && string.IsNullOrEmpty(filePath)) { filePath = Environment.GetFolderPath(Environment.SpecialFolder.Desktop); } // 调用导出处理程序 Export(list, ColMergeNum); // WEB导出 if (1 == method) { System.Web.HttpContext.Current.Response.ContentType = "application/vnd.ms-excel"; //设置下载的Excel文件名\ if (System.Web.HttpContext.Current.Request.ServerVariables["http_user_agent"].ToString().IndexOf("Firefox") != -1) { //火狐浏览器 System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}", "=?UTF-8?B?" + Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(fileName)) + "?=")); } else { //IE等浏览器 System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}", System.Web.HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8))); } using (MemoryStream ms = new MemoryStream()) { //将工作簿的内容放到内存流中 _workbook.Write(ms); //将内存流转换成字节数组发送到客户端 System.Web.HttpContext.Current.Response.BinaryWrite(ms.GetBuffer()); System.Web.HttpContext.Current.Response.End(); _sheet = null; _workbook = null; } } else if (2 == method) { using (FileStream fs = File.Open(filePath, FileMode.Append)) { _workbook.Write(fs); _sheet = null; _workbook = null; } } } /// <summary> /// 导出方法实现 /// </summary> /// <param></param> private static void Export(IList<NPOIModel> list, int ColMergeNum) { #region 变量声明 // 初始化 _workbook = new HSSFWorkbook(); // 声明 Row 对象 IRow _row; // 声明 Cell 对象 ICell _cell; // 总列数 int cols = 0; // 总行数 int rows = 0; // 行数计数器 int rowIndex = 0; // 单元格值 string drValue = null; #endregion foreach (NPOIModel model in list) { // 工作薄命名 if (model.sheetName != null) _sheet = (HSSFSheet)_workbook.CreateSheet(model.sheetName); else _sheet = (HSSFSheet)_workbook.CreateSheet(); // 获取数据源 DataTable dt = model.dataSource; // 初始化 rowIndex = 0; // 获取总行数 rows = GetRowCount(model.headerName); // 获取总列数 cols = GetColCount(model.headerName); //合计：合并表格末行N列,rows为表头行数，dt.Rows.Count为数据行数 if (ColMergeNum > 1) { CellRangeAddress region_Merge = new CellRangeAddress(rows + dt.Rows.Count, rows + dt.Rows.Count, 0, ColMergeNum - 1); _sheet.AddMergedRegion(region_Merge); } ICellStyle myBodyStyle = bodyStyle; ICellStyle myTitleStyle = titleStyle; ICellStyle myDateStyle = dateStyle; ICellStyle myBodyRightStyle = bodyRightStyle; // 循环行数 foreach (DataRow row in dt.Rows) { #region 新建表，填充表头，填充列头，样式 if (rowIndex == 65535 || rowIndex == 0) { if (rowIndex != 0) _sheet = (HSSFSheet)_workbook.CreateSheet(); // 构建行 for (int i = 0; i < rows + model.isTitle; i++) { _row = _sheet.GetRow(i); // 创建行 if (_row == null) _row = _sheet.CreateRow(i); for (int j = 0; j < cols; j++) _row.CreateCell(j).CellStyle = myBodyStyle; } // 如果存在表标题 if (model.isTitle > 0) { // 获取行 _row = _sheet.GetRow(0); // 合并单元格 CellRangeAddress region = new CellRangeAddress(0, 0, 0, (cols - 1)); _sheet.AddMergedRegion(region); // 填充值 _row.CreateCell(0).SetCellValue(model.tableTitle); // 设置样式 _row.GetCell(0).CellStyle = myTitleStyle; // 设置行高 _row.HeightInPoints = 20; } // 取得上一个实体 NPOIHeader lastRow = null; IList<NPOIHeader> hList = GetHeaders(model.headerName, rows, model.isTitle); // 创建表头 foreach (NPOIHeader m in hList) { var data = hList.Where(c => c.firstRow == m.firstRow && c.lastCol == m.firstCol - 1); if (data.Count() > 0) { lastRow = data.First(); if (m.headerName == lastRow.headerName) m.firstCol = lastRow.firstCol; } // 获取行 _row = _sheet.GetRow(m.firstRow); // 合并单元格 CellRangeAddress region = new CellRangeAddress(m.firstRow, m.lastRow, m.firstCol, m.lastCol); _sheet.AddMergedRegion(region); // 填充值 _row.CreateCell(m.firstCol).SetCellValue(m.headerName); } // 填充表头样式 for (int i = 0; i < rows + model.isTitle; i++) { _row = _sheet.GetRow(i); for (int j = 0; j < cols; j++) { _row.GetCell(j).CellStyle = myBodyStyle; //设置列宽 _sheet.SetColumnWidth(j, (model.colWidths[j] + 1) * 450); } } rowIndex = (rows + model.isTitle); } #endregion #region 填充内容 // 构建列 _row = _sheet.CreateRow(rowIndex); foreach (DataColumn column in dt.Columns) { // 添加序号列 if (1 == model.isOrderby && column.Ordinal == 0) { _cell = _row.CreateCell(0); _cell.SetCellValue(rowIndex - rows); _cell.CellStyle = myBodyStyle; } // 创建列 _cell = _row.CreateCell(column.Ordinal + model.isOrderby); // 获取值 drValue = row[column].ToString(); switch (column.DataType.ToString()) { case "System.String"://字符串类型 _cell.SetCellValue(drValue); _cell.CellStyle = myBodyStyle; break; case "System.DateTime"://日期类型 DateTime dateV; DateTime.TryParse(drValue, out dateV); _cell.SetCellValue(dateV); _cell.CellStyle = myDateStyle;//格式化显示 break; case "System.Boolean"://布尔型 bool boolV = false; bool.TryParse(drValue, out boolV); _cell.SetCellValue(boolV); _cell.CellStyle = myBodyStyle; break; case "System.Int16"://整型 case "System.Int32": case "System.Int64": case "System.Byte": int intV = 0; int.TryParse(drValue, out intV); _cell.SetCellValue(intV); _cell.CellStyle = myBodyRightStyle; break; case "System.Decimal"://浮点型 case "System.Double": double doubV = 0; double.TryParse(drValue, out doubV); _cell.SetCellValue(doubV.ToString("f2")); _cell.CellStyle = myBodyRightStyle; break; case "System.DBNull"://空值处理 _cell.SetCellValue(""); break; default: _cell.SetCellValue(""); break; } } #endregion rowIndex++; } } } #region 辅助方法 /// <summary> /// 表头解析 /// </summary> /// <remarks> /// </remarks> /// <param>表头</param> /// <param>总行数</param> /// <param>外加行</param> /// <param>外加列</param> /// <returns></returns> private static IList<NPOIHeader> GetHeaders(string header, int rows, int addRows) { // 临时表头数组 string[] tempHeader; string[] tempHeader2; // 所跨列数 int colSpan = 0; // 所跨行数 int rowSpan = 0; // 单元格对象 NPOIHeader model = null; // 行数计数器 int rowIndex = 0; // 列数计数器 int colIndex = 0; // IList<NPOIHeader> list = new List<NPOIHeader>(); // 初步解析 string[] headers = header.Split(new string[] { "#" }, StringSplitOptions.RemoveEmptyEntries); // 表头遍历 for (int i = 0; i < headers.Length; i++) { // 行数计数器清零 rowIndex = 0; // 列数计数器清零 colIndex = 0; // 获取所跨行数 rowSpan = GetRowSpan(headers[i], rows); // 获取所跨列数 colSpan = GetColSpan(headers[i]); // 如果所跨行数与总行数相等，则不考虑是否合并单元格问题 if (rows == rowSpan) { colIndex = GetMaxCol(list); model = new NPOIHeader(headers[i], addRows, (rowSpan - 1 + addRows), colIndex, (colSpan - 1 + colIndex), addRows); list.Add(model); rowIndex += (rowSpan - 1) + addRows; } else { // 列索引 colIndex = GetMaxCol(list); // 如果所跨行数不相等，则考虑是否包含多行 tempHeader = headers[i].Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries); for (int j = 0; j < tempHeader.Length; j++) { // 如果总行数=数组长度 if (1 == GetColSpan(tempHeader[j])) { if (j == tempHeader.Length - 1 && tempHeader.Length < rows) { model = new NPOIHeader(tempHeader[j], (j + addRows), (j + addRows) + (rows - tempHeader.Length), colIndex, (colIndex + colSpan - 1), addRows); list.Add(model); } else { model = new NPOIHeader(tempHeader[j], (j + addRows), (j + addRows), colIndex, (colIndex + colSpan - 1), addRows); list.Add(model); } } else { // 如果所跨列数不相等，则考虑是否包含多列 tempHeader2 = tempHeader[j].Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries); for (int m = 0; m < tempHeader2.Length; m++) { // 列索引 colIndex = GetMaxCol(list) - colSpan + m; if (j == tempHeader.Length - 1 && tempHeader.Length < rows) { model = new NPOIHeader(tempHeader2[m], (j + addRows), (j + addRows) + (rows - tempHeader.Length), colIndex, colIndex, addRows); list.Add(model); } else { model = new NPOIHeader(tempHeader2[m], (j + addRows), (j + addRows), colIndex, colIndex, addRows); list.Add(model); } } } rowIndex += j + addRows; } } } return list; } /// <summary> /// 获取最大列 /// </summary> /// <param></param> /// <returns></returns> private static int GetMaxCol(IList<NPOIHeader> list) { int maxCol = 0; if (list.Count > 0) { foreach (NPOIHeader model in list) { if (maxCol < model.lastCol) maxCol = model.lastCol; } maxCol += 1; } return maxCol; } /// <summary> /// 获取表头行数 /// </summary> /// <param>表头文字</param> /// <returns></returns> private static int GetRowCount(string newHeaders) { string[] ColumnNames = newHeaders.Split(new char[] { '@' }); int Count = 0; if (ColumnNames.Length <= 1) ColumnNames = newHeaders.Split(new char[] { '#' }); foreach (string name in ColumnNames) { int TempCount = name.Split(new char[] { ' ' }).Length; if (TempCount > Count) Count = TempCount; } return Count; } /// <summary> /// 获取表头列数 /// </summary> /// <param>表头文字</param> /// <returns></returns> private static int GetColCount(string newHeaders) { string[] ColumnNames = newHeaders.Split(new char[] { '@' }); int Count = 0; if (ColumnNames.Length <= 1) ColumnNames = newHeaders.Split(new char[] { '#' }); Count = ColumnNames.Length; foreach (string name in ColumnNames) { int TempCount = name.Split(new char[] { ',' }).Length; if (TempCount > 1) Count += TempCount - 1; } return Count; } /// <summary> /// 列头跨列数 /// </summary> /// <remarks> /// </remarks> /// <param>表头文字</param> /// <returns></returns> private static int GetColSpan(string newHeaders) { return newHeaders.Split(',').Count(); } /// <summary> /// 列头跨行数 /// </summary> /// <remarks> /// </remarks> /// <param>列头文本</param> /// <param>表头总行数</param> /// <returns></returns> private static int GetRowSpan(string newHeaders, int rows) { int Count = newHeaders.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries).Length; // 如果总行数与当前表头所拥有行数相等 if (rows == Count) Count = 1; else if (Count < rows) Count = 1 + (rows - Count); else throw new Exception("表头格式不正确！"); return Count; } #endregion #region 单元格样式 /// <summary> /// 数据单元格样式 /// </summary> private static ICellStyle bodyStyle { get { ICellStyle style = _workbook.CreateCellStyle(); style.Alignment = HorizontalAlignment.CENTER; //居中 style.VerticalAlignment = VerticalAlignment.CENTER;//垂直居中 style.WrapText = true;//自动换行 // 边框 style.BorderBottom = BorderStyle.THIN; style.BorderLeft = BorderStyle.THIN; style.BorderRight = BorderStyle.THIN; style.BorderTop = BorderStyle.THIN; // 字体 //IFont font = _workbook.CreateFont(); //font.FontHeightInPoints = 10; //font.FontName = "宋体"; //style.SetFont(font); return style; } } /// <summary> /// 数据单元格样式 /// </summary> private static ICellStyle bodyRightStyle { get { ICellStyle style = _workbook.CreateCellStyle(); style.Alignment = HorizontalAlignment.RIGHT; //居中 style.VerticalAlignment = VerticalAlignment.CENTER;//垂直居中 style.WrapText = true;//自动换行 // 边框 style.BorderBottom = BorderStyle.THIN; style.BorderLeft = BorderStyle.THIN; style.BorderRight = BorderStyle.THIN; style.BorderTop = BorderStyle.THIN; // 字体 //IFont font = _workbook.CreateFont(); //font.FontHeightInPoints = 10; //font.FontName = "宋体"; //style.SetFont(font); return style; } } /// <summary> /// 标题单元格样式 /// </summary> private static ICellStyle titleStyle { get { ICellStyle style = _workbook.CreateCellStyle(); style.Alignment = HorizontalAlignment.CENTER; //居中 style.VerticalAlignment = VerticalAlignment.CENTER;//垂直居中 style.WrapText = true;//自动换行 //IFont font = _workbook.CreateFont(); //font.FontHeightInPoints = 14; //font.FontName = "宋体"; //font.Boldweight = (short)FontBoldWeight.BOLD; //style.SetFont(font); return style; } } /// <summary> /// 日期单元格样式 /// </summary> private static ICellStyle dateStyle { get { ICellStyle style = _workbook.CreateCellStyle(); style.Alignment = HorizontalAlignment.CENTER; //居中 style.VerticalAlignment = VerticalAlignment.CENTER;//垂直居中 style.WrapText = true;//自动换行 // 边框 style.BorderBottom = BorderStyle.THIN; style.BorderLeft = BorderStyle.THIN; style.BorderRight = BorderStyle.THIN; style.BorderTop = BorderStyle.THIN; // 字体 //IFont font = _workbook.CreateFont(); //font.FontHeightInPoints = 10; //font.FontName = "宋体"; //style.SetFont(font); IDataFormat format = _workbook.CreateDataFormat(); style.DataFormat = format.GetFormat("yyyy-MM-dd"); return style; } } #endregion #endregion } /// <summary> /// 实体类 /// </summary> public class NPOIModel { /// <summary> /// 数据源 /// </summary> public DataTable dataSource { get; private set; } /// <summary> /// 要导出的数据列数组 /// </summary> public string[] fileds { get; private set; } /// <summary> /// 工作薄名称数组 /// </summary> public string sheetName { get; private set; } /// <summary> /// 表标题 /// </summary> public string tableTitle { get; private set; } /// <summary> /// 表标题是否存在 1：存在 0：不存在 /// </summary> public int isTitle { get; private set; } /// <summary> /// 是否添加序号 /// </summary> public int isOrderby { get; private set; } /// <summary> /// 表头 /// </summary> public string headerName { get; private set; } /// <summary> /// 取得列宽 /// </summary> public int[] colWidths { get; private set; } /// <summary> /// 构造函数 /// </summary> /// <remarks> /// </remarks> /// <param>数据来源 DataTable</param> /// <param>要导出的字段，如果为空或NULL，则默认全部</param> /// <param>工作薄名称</param> /// <param>表头名称 如果为空或NULL，则默认数据列字段 /// 相邻父列头之间用'#'分隔,父列头与子列头用空格(' ')分隔,相邻子列头用逗号分隔(',') /// 两行：序号#分公司#组别#本日成功签约单数 预警,续约,流失,合计#累计成功签约单数 预警,续约,流失,合计#任务数#完成比例#排名 /// 三行：等级#级别#上期结存 件数,重量,比例#本期调入 收购调入 件数,重量,比例#本期发出 车间投料 件数,重量,比例#本期发出 产品外销百分比 件数,重量,比例#平均值 /// 三行时请注意：列头要重复 /// </param> /// <param>表标题</param> /// <param>是否添加序号 0：不添加 1：添加</param> public NPOIModel(DataTable dataSource, string filed, string sheetName, string headerName, string tableTitle = null, int isOrderby = 0) { if (!string.IsNullOrEmpty(filed)) { this.fileds = filed.ToUpper().Split(new string[] { ";" }, StringSplitOptions.RemoveEmptyEntries); // 移除多余数据列 for (int i = dataSource.Columns.Count - 1; i >= 0; i--) { DataColumn dc = dataSource.Columns[i]; if (!this.fileds.Contains(dataSource.Columns[i].Caption.ToUpper())) { dataSource.Columns.Remove(dataSource.Columns[i]); } } // 列索引 int colIndex = 0; // 循环排序 for (int i = 0; i < dataSource.Columns.Count; i++) { // 获取索引 colIndex = GetColIndex(dataSource.Columns[i].Caption.ToUpper()); // 设置下标 dataSource.Columns[i].SetOrdinal(colIndex); } } else { this.fileds = new string[dataSource.Columns.Count]; for (int i = 0; i < dataSource.Columns.Count; i++) { this.fileds[i] = dataSource.Columns[i].ColumnName; } } this.dataSource = dataSource; if (!string.IsNullOrEmpty(sheetName)) { this.sheetName = sheetName; } if (!string.IsNullOrEmpty(headerName)) { this.headerName = headerName; } else { this.headerName = string.Join("#", this.fileds); } if (!string.IsNullOrEmpty(tableTitle)) { this.tableTitle = tableTitle; this.isTitle = 1; } // 取得数据列宽 数据列宽可以和表头列宽比较，采取最长宽度 colWidths = new int[this.dataSource.Columns.Count]; foreach (DataColumn item in this.dataSource.Columns) { colWidths[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length; } // 循环比较最大宽度 for (int i = 0; i < this.dataSource.Rows.Count; i++) { for (int j = 0; j < this.dataSource.Columns.Count; j++) { int intTemp = Encoding.GetEncoding(936).GetBytes(this.dataSource.Rows[i][j].ToString()).Length; if (intTemp > colWidths[j]) { colWidths[j] = intTemp; } } } if (isOrderby > 0) { this.isOrderby = isOrderby; this.headerName = "序号#" + this.headerName; } } /// <summary> /// 获取列名下标 /// </summary> /// <param>列名称</param> /// <returns></returns> private int GetColIndex(string colName) { for (int i = 0; i < this.fileds.Length; i++) { if (colName == this.fileds[i]) return i; } return 0; } } /// <summary> /// 表头构建类 /// </summary> public class NPOIHeader { /// <summary> /// 表头 /// </summary> public string headerName { get; set; } /// <summary> /// 起始行 /// </summary> public int firstRow { get; set; } /// <summary> /// 结束行 /// </summary> public int lastRow { get; set; } /// <summary> /// 起始列 /// </summary> public int firstCol { get; set; } /// <summary> /// 结束列 /// </summary> public int lastCol { get; set; } /// <summary> /// 是否跨行 /// </summary> public int isRowSpan { get; private set; } /// <summary> /// 是否跨列 /// </summary> public int isColSpan { get; private set; } /// <summary> /// 外加行 /// </summary> public int rows { get; set; } public NPOIHeader() { } /// <summary> /// 构造函数 /// </summary> /// <param>表头</param> /// <param>起始行</param> /// <param>结束行</param> /// <param>起始列</param> /// <param>结束列</param> /// <param>外加行</param> /// <param>外加列</param> public NPOIHeader(string headerName, int firstRow, int lastRow, int firstCol, int lastCol, int rows = 0) { this.headerName = headerName; this.firstRow = firstRow; this.lastRow = lastRow; this.firstCol = firstCol; this.lastCol = lastCol; // 是否跨行判断 if (firstRow != lastRow) isRowSpan = 1; if (firstCol != lastCol) isColSpan = 1; this.rows = rows; } } }
3、导出代码示例如下：