/// <summary> /// 获取目录下文件路径 /// </summary> /// <param name="path"></param> /// <param name="type">例如:"zip","xls"</param> /// <returns></returns> List<string> GetFilesPath(string path,string type) { List<string> filesPath = new List<string>(); FileInfo[] files = GetFileInfo(path); foreach (FileInfo item in files) { if (item.FullName.Contains(type)) { filesPath.Add(item.FullName); } } return filesPath; } /// <summary> /// 获取路径下的所有文件 /// </summary> /// <param name="path">文件夹路径</param> /// <returns>所有文件</returns> FileInfo[] GetFileInfo(string path) { DirectoryInfo root = new DirectoryInfo(path); FileInfo[] files = root.GetFiles(); return files; }
读取.xls文件到DataSet
/// <summary> /// 读取Excel表 /// </summary> /// <param name="filePath">路径</param> /// <param name="table">表名</param> /// <returns>DataSet</returns> public static DataSet LoadDataFromExcel(string filePath, string table) { try { string strConn; strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties='Excel 8.0;HDR=False;IMEX=1'"; OleDbConnection OleConn = new OleDbConnection(strConn); OleConn.Open(); String sql = "SELECT * FROM [" + table + "$]";//可是更改Sheet名称，比如sheet2，等等 OleDbDataAdapter OleDaExcel = new OleDbDataAdapter(sql, OleConn); DataSet OleDsExcle = new DataSet(); OleDaExcel.Fill(OleDsExcle, table); OleConn.Close(); return OleDsExcle; } catch (Exception err) { //MessageBox.Show("数据绑定Excel失败!失败原因：" + err.Message, "提示信息", //MessageBoxButtons.OK, MessageBoxIcon.Information); return null; } }
导出DataTable到.xls格式，如果是.xlsx将代码中HSS改为XSS
首先引入NPOI
/// <summary> /// DataTable导出到Excel文件 .xls格式 /// </summary> /// <param name="dtSource">源DataSet</param> /// <param name="strFileName">保存位置</param> public static void DataTableToExcel(DataTable dt, string strFileName) { using (MemoryStream ms = DataSetToExcel(dt)) { using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write)) { byte[] data = ms.ToArray(); fs.Write(data, 0, data.Length); fs.Flush(); } } } /// <summary> /// DataTable导出到Excel的MemoryStream /// </summary> /// <param name="dtSource">源DataTable</param> public static MemoryStream DataSetToExcel(DataTable dt) { HSSFWorkbook workbook = new HSSFWorkbook(); // HSSFSheet sheet = (HSSFSheet)workbook.CreateSheet(); HSSFSheet sheet = (HSSFSheet)workbook.CreateSheet(dt.TableName.ToString()); #region 右击文件 属性信息 { DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation(); dsi.Company = "NPOI"; // workbook.DocumentSummaryInformation = dsi; SummaryInformation si = PropertySetFactory.CreateSummaryInformation(); //si.Author = "文件作者信息"; //填加xls文件作者信息 //si.ApplicationName = "创建程序信息"; //填加xls文件创建程序信息 //si.LastAuthor = "最后保存者信息"; //填加xls文件最后保存者信息 //si.Comments = "作者信息"; //填加xls文件作者信息 //si.Title = "标题信息"; //填加xls文件标题信息 //si.Subject = "主题信息";//填加文件主题信息 si.CreateDateTime = System.DateTime.Now; // workbook.SummaryInformation = si; } #endregion HSSFCellStyle dateStyle = (HSSFCellStyle)workbook.CreateCellStyle(); HSSFDataFormat format = (HSSFDataFormat)workbook.CreateDataFormat(); dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd"); //取得列宽 /* int[] arrColWidth = new int[dtSource.Columns.Count]; foreach (DataColumn item in dtSource.Columns) { arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length; } for (int i = 0; i < dtSource.Rows.Count; i++) { for (int j = 0; j < dtSource.Columns.Count; j++) { int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length; if (intTemp > arrColWidth[j]) { arrColWidth[j] = intTemp; } } } */ int rowIndex = 0; foreach (DataRow row in dt.Rows) { #region 新建表，填充表头，填充列头，样式 if (rowIndex == 0) { //if (rowIndex != 0) //{ // sheet = (XSSFSheet)workbook.CreateSheet(); //} #region 表头及样式 //{ //XSSFRow headerRow = (XSSFRow)sheet.CreateRow(0); //headerRow.HeightInPoints = 25; //headerRow.CreateCell(0).SetCellValue(strHeaderText); //HSSFCellStyle headStyle = (HSSFCellStyle)workbook.CreateCellStyle(); //// headStyle.Alignment = CellHorizontalAlignment.CENTER; //HSSFFont font = (HSSFFont)workbook.CreateFont(); //font.FontHeightInPoints = 20; //font.Boldweight = 700; //headStyle.SetFont(font); //headerRow.GetCell(0).CellStyle = headStyle; //// sheet.AddMergedRegion(new Region(0, 0, 0, dtSource.Columns.Count - 1)); ////headerRow.Dispose(); //} #endregion #region 列头及样式 //{ // XSSFRow headerRow = (XSSFRow)sheet.CreateRow(0); // XSSFCellStyle headStyle = (XSSFCellStyle)workbook.CreateCellStyle(); // //headStyle.Alignment = CellHorizontalAlignment.CENTER; // XSSFFont font = (XSSFFont)workbook.CreateFont(); // font.FontHeightInPoints = 10; // font.Boldweight = 700; // headStyle.SetFont(font); // foreach (DataColumn column in ds.Tables[k].Columns) // { // headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName); // headerRow.GetCell(column.Ordinal).CellStyle = headStyle; // //设置列宽 // // sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256); // } // // headerRow.Dispose(); //} #endregion rowIndex = 1; } #endregion #region 填充内容 HSSFRow dataRow = (HSSFRow)sheet.CreateRow(rowIndex); foreach (DataColumn column in dt.Columns) { HSSFCell newCell = (HSSFCell)dataRow.CreateCell(column.Ordinal); string drValue = row[column].ToString(); switch (column.DataType.ToString()) { case "System.String"://字符串类型 newCell.SetCellValue(drValue); break; case "System.DateTime"://日期类型 System.DateTime dateV; System.DateTime.TryParse(drValue, out dateV); newCell.SetCellValue(dateV); newCell.CellStyle = dateStyle;//格式化显示 break; case "System.Boolean"://布尔型 bool boolV = false; bool.TryParse(drValue, out boolV); newCell.SetCellValue(boolV); break; case "System.Int16"://整型 case "System.Int32": case "System.Int64": case "System.Byte": int intV = 0; int.TryParse(drValue, out intV); newCell.SetCellValue(intV); break; case "System.Decimal"://浮点型 case "System.Double": double doubV = 0; double.TryParse(drValue, out doubV); newCell.SetCellValue(doubV); break; case "System.DBNull"://空值处理 newCell.SetCellValue(""); break; default: newCell.SetCellValue(""); break; } } #endregion rowIndex++; } using (MemoryStream ms = new MemoryStream()) { workbook.Write(ms); ms.Flush(); return ms; } }
导出DataTable到.csv格式
public static void Export2CSV(DataTable data, string filename, bool exportHeader = true) { if (File.Exists(filename)) File.Delete(filename); var buffer = new StringBuilder(); if (exportHeader) { for (var i = 0; i < data.Columns.Count; i++) { buffer.AppendFormat(""{0}"", data.Columns[i].ColumnName); if (i < data.Columns.Count - 1) buffer.Append(","); } buffer.AppendLine(); } for (var i = 0; i < data.Rows.Count; i++) { for (var j = 0; j < data.Columns.Count; j++) { buffer.AppendFormat(""{0}"", data.Rows[i][j].ToString()); if (j < data.Columns.Count - 1) buffer.Append(","); } buffer.AppendLine(); } File.WriteAllText(filename, buffer.ToString(), Encoding.Default); }
Zip解压 引入插件：
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; using ICSharpCode.SharpZipLib.Zip; using ICSharpCode.SharpZipLib.Checksums; namespace Jerry.API.C { /// <summary> /// 适用与ZIP压缩 /// </summary> public class ZipHelper { #region 压缩 /// <summary> /// 递归压缩文件夹的内部方法 /// </summary> /// <param name="folderToZip">要压缩的文件夹路径</param> /// <param name="zipStream">压缩输出流</param> /// <param name="parentFolderName">此文件夹的上级文件夹</param> /// <returns></returns> private static bool ZipDirectory(string folderToZip, ZipOutputStream zipStream, string parentFolderName) { bool result = true; string[] folders, files; ZipEntry ent = null; FileStream fs = null; Crc32 crc = new Crc32(); try { ent = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/")); zipStream.PutNextEntry(ent); zipStream.Flush(); files = Directory.GetFiles(folderToZip); foreach (string file in files) { fs = File.OpenRead(file); byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); ent = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/" + Path.GetFileName(file))); ent.DateTime = DateTime.Now; ent.Size = fs.Length; fs.Close(); crc.Reset(); crc.Update(buffer); ent.Crc = crc.Value; zipStream.PutNextEntry(ent); zipStream.Write(buffer, 0, buffer.Length); } } catch { result = false; } finally { if (fs != null) { fs.Close(); fs.Dispose(); } if (ent != null) { ent = null; } GC.Collect(); GC.Collect(1); } folders = Directory.GetDirectories(folderToZip); foreach (string folder in folders) if (!ZipDirectory(folder, zipStream, folderToZip)) return false; return result; } /// <summary> /// 压缩文件夹 /// </summary> /// <param name="folderToZip">要压缩的文件夹路径</param> /// <param name="zipedFile">压缩文件完整路径</param> /// <param name="password">密码</param> /// <returns>是否压缩成功</returns> public static bool ZipDirectory(string folderToZip, string zipedFile, string password) { bool result = false; if (!Directory.Exists(folderToZip)) return result; ZipOutputStream zipStream = new ZipOutputStream(File.Create(zipedFile)); zipStream.SetLevel(6); if (!string.IsNullOrEmpty(password)) zipStream.Password = password; result = ZipDirectory(folderToZip, zipStream, ""); zipStream.Finish(); zipStream.Close(); return result; } /// <summary> /// 压缩文件夹 /// </summary> /// <param name="folderToZip">要压缩的文件夹路径</param> /// <param name="zipedFile">压缩文件完整路径</param> /// <returns>是否压缩成功</returns> public static bool ZipDirectory(string folderToZip, string zipedFile) { bool result = ZipDirectory(folderToZip, zipedFile, null); return result; } /// <summary> /// 压缩文件 /// </summary> /// <param name="fileToZip">要压缩的文件全名</param> /// <param name="zipedFile">压缩后的文件名</param> /// <param name="password">密码</param> /// <returns>压缩结果</returns> public static bool ZipFile(string fileToZip, string zipedFile, string password) { bool result = true; ZipOutputStream zipStream = null; FileStream fs = null; ZipEntry ent = null; if (!File.Exists(fileToZip)) return false; try { fs = File.OpenRead(fileToZip); byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); fs.Close(); fs = File.Create(zipedFile); zipStream = new ZipOutputStream(fs); if (!string.IsNullOrEmpty(password)) zipStream.Password = password; ent = new ZipEntry(Path.GetFileName(fileToZip)); zipStream.PutNextEntry(ent); zipStream.SetLevel(6); zipStream.Write(buffer, 0, buffer.Length); } catch { result = false; } finally { if (zipStream != null) { zipStream.Finish(); zipStream.Close(); } if (ent != null) { ent = null; } if (fs != null) { fs.Close(); fs.Dispose(); } } GC.Collect(); GC.Collect(1); return result; } /// <summary> /// 压缩文件 /// </summary> /// <param name="fileToZip">要压缩的文件全名</param> /// <param name="zipedFile">压缩后的文件名</param> /// <returns>压缩结果</returns> public static bool ZipFile(string fileToZip, string zipedFile) { bool result = ZipFile(fileToZip, zipedFile, null); return result; } /// <summary> /// 压缩文件或文件夹 /// </summary> /// <param name="fileToZip">要压缩的路径</param> /// <param name="zipedFile">压缩后的文件名</param> /// <param name="password">密码</param> /// <returns>压缩结果</returns> public static bool Zip(string fileToZip, string zipedFile, string password) { bool result = false; if (Directory.Exists(fileToZip)) result = ZipDirectory(fileToZip, zipedFile, password); else if (File.Exists(fileToZip)) result = ZipFile(fileToZip, zipedFile, password); return result; } /// <summary> /// 压缩文件或文件夹 /// </summary> /// <param name="fileToZip">要压缩的路径</param> /// <param name="zipedFile">压缩后的文件名</param> /// <returns>压缩结果</returns> public static bool Zip(string fileToZip, string zipedFile) { bool result = Zip(fileToZip, zipedFile, null); return result; } #endregion #region 解压 /// <summary> /// 解压功能(解压压缩文件到指定目录) /// </summary> /// <param name="fileToUnZip">待解压的文件</param> /// <param name="zipedFolder">指定解压目标目录</param> /// <param name="password">密码</param> /// <returns>解压结果</returns> public static bool UnZip(string fileToUnZip, string zipedFolder, string password) { bool result = true; FileStream fs = null; ZipInputStream zipStream = null; ZipEntry ent = null; string fileName; if (!File.Exists(fileToUnZip)) return false; if (!Directory.Exists(zipedFolder)) Directory.CreateDirectory(zipedFolder); try { zipStream = new ZipInputStream(File.OpenRead(fileToUnZip)); if (!string.IsNullOrEmpty(password)) zipStream.Password = password; while ((ent = zipStream.GetNextEntry()) != null) { if (!string.IsNullOrEmpty(ent.Name)) { fileName = Path.Combine(zipedFolder, ent.Name); fileName = fileName.Replace('/', '\');//change by Mr.HopeGi if (fileName.EndsWith("\")) { Directory.CreateDirectory(fileName); continue; } fs = File.Create(fileName); int size = 2048; byte[] data = new byte[size]; while (true) { size = zipStream.Read(data, 0, data.Length); if (size > 0) fs.Write(data, 0, data.Length); else break; } } } } catch { result = false; } finally { if (fs != null) { fs.Close(); fs.Dispose(); } if (zipStream != null) { zipStream.Close(); zipStream.Dispose(); } if (ent != null) { ent = null; } GC.Collect(); GC.Collect(1); } return result; } /// <summary> /// 解压功能(解压压缩文件到指定目录) /// </summary> /// <param name="fileToUnZip">待解压的文件</param> /// <param name="zipedFolder">指定解压目标目录</param> /// <returns>解压结果</returns> public static bool UnZip(string fileToUnZip, string zipedFolder) { bool result = UnZip(fileToUnZip, zipedFolder, null); return result; } #endregion } }