免费高效实用的.NET操作Excel组件NPOI(.NET组件介绍之六)
很多的软件项目几乎都包含着对文档的操作,前面已经介绍过两款操作文档的组件,现在介绍一款文档操作的组件NPOI。
NPOI可以生成没有安装在您的服务器上的Microsoft Office套件的Excel报表,并且在后台调用Microsoft Excel ActiveX更有效率;从Office文档中提取文本,以帮助您实现全文索引功能(大多数时候,此功能用于创建搜索引擎); 从Office文档提取图像; 生成包含公式的Excel工作表。
一.NPOI组件概述:
NPOI是完全免费使用; 涵盖Excel的大多数功能(单元格样式,数据格式,公式等);支持xls,xlsx,docx;设计为面向接口(看看NPOI.SS命名空间);支持不仅导出而且导入; .Net 2.0甚至为xlsx和docx(虽然我们也支持.NET 4.0); 来自世界各地的成功案例;巨大的基本例子;对隔离存储没有依赖。
以上是NPOI的优点,其他一些优点可以不用太在意,估计很多人对“支持xls,xlsx,docx”这一特点感觉有些惊讶,因为在很多人的印象里面NPOI就是对Excel进行相关的操作,但是在这里突然看到了对docx也可以操作,这一特点可能让很多人感到欣喜,因为NPOI的的确确是一个很不错的组件,用过的人都说好,我也不例外。
NPOI的运行要求:VS2010与.NET 4.0运行时;VS2005或VS2008与.NET 2.0运行时(SP1);vs2003与.NET 1.1;Mono;ASP.NET中的中等信任环境。
二.NPOI核心类和方法解析:
以上是对NPOI的相关背景和使用环境做了一个简单的介绍,接下来我具体的看一下NPOI的一些核心类和方法,由于下载的是DLL文件,还是采用.NET Reflector对DLL文件进行反编译,以此查看源代码。
如果需要具体的了解NPOI可以直接访问:http://npoi.codeplex.com/SourceControl/latest,提供了NPOI的源码和一些demo,由于本溪介绍的重点是NPOI对Excel的操作,所以下面的类和实例主要是对操作Excel的介绍,如果需要对docx的操作,可以具体查看相应的类demo。
1.XSSFWorkbook类CreateSheet():创建表。
public ISheet CreateSheet(string sheetname)<br/> {<br/> if (sheetname == null)<br/> {<br/> throw new ArgumentException("sheetName must not be null");<br/> }<br/> if (this.ContainsSheet(sheetname, this.sheets.Count))<br/> {<br/> throw new ArgumentException("The workbook already contains a sheet of this name");<br/> }<br/> if (sheetname.Length > 0x1f)<br/> {<br/> sheetname = sheetname.Substring(, 0x1f);<br/> }<br/> WorkbookUtil.ValidateSheetName(sheetname);<br/> CT_Sheet sheet = this.AddSheet(sheetname);<br/> int index = ;<br/> foreach (XSSFSheet sheet2 in this.sheets)<br/> {<br/> index = (int) Math.Max((long) (sheet2.sheet.sheetId + ), (long) index);<br/> }<br/> Label_0099:<br/> foreach (XSSFSheet sheet3 in this.sheets)<br/> {<br/> index = (int) Math.Max((long) (sheet3.sheet.sheetId + ), (long) index);<br/> }<br/> string fileName = XSSFRelation.WORKSHEET.GetFileName(index);<br/> foreach (POIXMLDocumentPart part in base.GetRelations())<br/> {<br/> if ((part.GetPackagePart() != null) && fileName.Equals(part.GetPackagePart().PartName.Name))<br/> {<br/> index++;<br/> goto Label_0099;<br/> }<br/> }<br/> XSSFSheet item = (XSSFSheet) base.CreateRelationship(XSSFRelation.WORKSHEET, XSSFFactory.GetInstance(), index);<br/> item.sheet = sheet;<br/> sheet.id = item.GetPackageRelationship().Id;<br/> sheet.sheetId = (uint) index;<br/> if (this.sheets.Count == )<br/> {<br/> item.IsSelected = true;<br/> }<br/> this.sheets.Add(item);<br/> return item;<br/> }
2.XSSFSheet类Write():将文件流写入到excel。
internal virtual void Write(Stream stream)<br/> {<br/> bool flag = false;<br/> if (this.worksheet.sizeOfColsArray() == )<br/> {<br/> CT_Cols colsArray = this.worksheet.GetColsArray();<br/> if (colsArray.sizeOfColArray() == )<br/> {<br/> flag = true;<br/> this.worksheet.SetColsArray(null);<br/> }<br/> else<br/> {<br/> this.SetColWidthAttribute(colsArray);<br/> }<br/> }<br/> if (this.hyperlinks.Count > )<br/> {<br/> if (this.worksheet.hyperlinks == null)<br/> {<br/> this.worksheet.AddNewHyperlinks();<br/> }<br/> CT_Hyperlink[] array = new CT_Hyperlink[this.hyperlinks.Count];<br/> for (int i = ; i < array.Length; i++)<br/> {<br/> XSSFHyperlink hyperlink = this.hyperlinks[i];<br/> hyperlink.GenerateRelationIfNeeded(base.GetPackagePart());<br/> array[i] = hyperlink.GetCTHyperlink();<br/> }<br/> this.worksheet.hyperlinks.SetHyperlinkArray(array);<br/> }<br/> foreach (XSSFRow row in this._rows.Values)<br/> {<br/> row.OnDocumentWrite();<br/> }<br/> Dictionary<string, string> dictionary = new Dictionary<string, string>();<br/> dictionary[ST_RelationshipId.NamespaceURI] = "r";<br/> new WorksheetDocument(this.worksheet).Save(stream);<br/> if (flag)<br/> {<br/> this.worksheet.AddNewCols();<br/> }<br/> }<br/>
3.XSSFSheet类CreateRow():创建行。
public virtual IRow CreateRow(int rownum)<br/> {<br/> CT_Row cTRow;<br/> XSSFRow row2 = this._rows.ContainsKey(rownum) ? this._rows[rownum] : null;<br/> if (row2 != null)<br/> {<br/> cTRow = row2.GetCTRow();<br/> cTRow.Set(new CT_Row());<br/> }<br/> else if ((this._rows.Count == ) || (rownum > this.GetLastKey(this._rows.Keys)))<br/> {<br/> cTRow = this.worksheet.sheetData.AddNewRow();<br/> }<br/> else<br/> {<br/> int count = this.HeadMap(this._rows, rownum).Count;<br/> cTRow = this.worksheet.sheetData.InsertNewRow(count);<br/> }<br/> XSSFRow row3 = new XSSFRow(cTRow, this) {<br/> RowNum = rownum<br/> };<br/> this._rows[rownum] = row3;<br/> return row3;<br/> }
4.XSSFWorkbook类GetSheet:获取表。
public ISheet GetSheet(string name)<br/> {<br/> foreach (XSSFSheet sheet in this.sheets)<br/> {<br/> if (name.Equals(sheet.SheetName, StringComparison.InvariantCultureIgnoreCase))<br/> {<br/> return sheet;<br/> }<br/> }<br/> return null;<br/> }
5.WorkbookFactory类:
public class PropertySetFactory<br/> {<br/> public static PropertySet Create(DirectoryEntry dir, string name);<br/> public static PropertySet Create(Stream stream);<br/> public static SummaryInformation CreateSummaryInformation();<br/> public static DocumentSummaryInformation CreateDocumentSummaryInformation();<br/> }
6.DocumentSummaryInformation:
[Serializable]<br/> public class DocumentSummaryInformation : SpecialPropertySet<br/> {<br/> // Fields<br/> public const string DEFAULT_STREAM_NAME = "\x0005DocumentSummaryInformation"; // Methods<br/> public DocumentSummaryInformation(PropertySet ps);<br/> private void EnsureSection2();<br/> public void RemoveByteCount();<br/> public void RemoveCategory();<br/> public void RemoveCompany();<br/> public void RemoveCustomProperties();<br/> public void RemoveDocparts();<br/> public void RemoveHeadingPair();<br/> public void RemoveHiddenCount();<br/> public void RemoveLineCount();<br/> public void RemoveLinksDirty();<br/> public void RemoveManager();<br/> public void RemoveMMClipCount();<br/> public void RemoveNoteCount();<br/> public void RemoveParCount();<br/> public void RemovePresentationFormat();<br/> public void RemoveScale();<br/> public void RemoveSlideCount(); // Properties<br/> public int ByteCount { get; set; }<br/> public string Category { get; set; }<br/> public string Company { get; set; }<br/> public CustomProperties CustomProperties { get; set; }<br/> public byte[] Docparts { get; set; }<br/> public byte[] HeadingPair { get; set; }<br/> public int HiddenCount { get; set; }<br/> public int LineCount { get; set; }<br/> public bool LinksDirty { get; set; }<br/> public string Manager { get; set; }<br/> public int MMClipCount { get; set; }<br/> public int NoteCount { get; set; }<br/> public int ParCount { get; set; }<br/> public string PresentationFormat { get; set; }<br/> public override PropertyIDMap PropertySetIDMap { get; }<br/> public bool Scale { get; set; }<br/> public int SlideCount { get; set; }<br/> } 具体方法:<br/> private void EnsureSection2()<br/> {<br/> if (this.SectionCount < )<br/> {<br/> MutableSection section = new MutableSection();<br/> section.SetFormatID(SectionIDMap.DOCUMENT_SUMMARY_INFORMATION_ID2);<br/> this.AddSection(section);<br/> }<br/> }
以上只是对部分的类和方法做了简单的说明,需要了解更多的内容,可以进入官网下载源码,或者使用软件查看DLL文件。
三.NPOI操作实例:
1.枚举(Excel单元格数据类型):
/// <summary><br/> /// 枚举(Excel单元格数据类型)<br/> /// </summary><br/> public enum NpoiDataType<br/> {<br/> /// <summary><br/> /// 字符串类型-值为1<br/> /// </summary><br/> String,<br/> /// <summary><br/> /// 布尔类型-值为2<br/> /// </summary><br/> Bool,<br/> /// <summary><br/> /// 时间类型-值为3<br/> /// </summary><br/> Datetime,<br/> /// <summary><br/> /// 数字类型-值为4<br/> /// </summary><br/> Numeric,<br/> /// <summary><br/> /// 复杂文本类型-值为5<br/> /// </summary><br/> Richtext,<br/> /// <summary><br/> /// 空白<br/> /// </summary><br/> Blank,<br/> /// <summary><br/> /// 错误<br/> /// </summary><br/> Error<br/> }
2. 将DataTable数据导入到excel中:
/// <summary><br/> /// 将DataTable数据导入到excel中<br/> /// </summary><br/> /// <param name="data">要导入的数据</param><br/> /// <param name="isColumnWritten">DataTable的列名是否要导入</param><br/> /// <param name="sheetName">要导入的excel的sheet的名称</param><br/> /// <param name="fileName">文件夹路径</param><br/> /// <returns>导入数据行数(包含列名那一行)</returns><br/> public static int DataTableToExcel(DataTable data, string sheetName, bool isColumnWritten, string fileName)<br/> {<br/> if (data == null)<br/> {<br/> throw new ArgumentNullException("data");<br/> }<br/> if (string.IsNullOrEmpty(sheetName))<br/> {<br/> throw new ArgumentNullException(sheetName);<br/> }<br/> if (string.IsNullOrEmpty(fileName))<br/> {<br/> throw new ArgumentNullException(fileName);<br/> }<br/> IWorkbook workbook = null;<br/> if (fileName.IndexOf(".xlsx", StringComparison.Ordinal) > )<br/> {<br/> workbook = new XSSFWorkbook();<br/> }<br/> else if (fileName.IndexOf(".xls", StringComparison.Ordinal) > )<br/> {<br/> workbook = new HSSFWorkbook();<br/> } FileStream fs = null;<br/> try<br/> {<br/> fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);<br/> ISheet sheet;<br/> if (workbook != null)<br/> {<br/> sheet = workbook.CreateSheet(sheetName);<br/> }<br/> else<br/> {<br/> return -;<br/> } int j;<br/> int count;<br/> //写入DataTable的列名,写入单元格中<br/> if (isColumnWritten)<br/> {<br/> var row = sheet.CreateRow();<br/> for (j = ; j < data.Columns.Count; ++j)<br/> {<br/> row.CreateCell(j).SetCellValue(data.Columns[j].ColumnName);<br/> }<br/> count = ;<br/> }<br/> else<br/> {<br/> count = ;<br/> }<br/> //遍历循环datatable具体数据项<br/> int i;<br/> for (i = ; i < data.Rows.Count; ++i)<br/> {<br/> var row = sheet.CreateRow(count);<br/> for (j = ; j < data.Columns.Count; ++j)<br/> {<br/> row.CreateCell(j).SetCellValue(data.Rows[i][j].ToString());<br/> }<br/> ++count;<br/> }<br/> //将文件流写入到excel<br/> workbook.Write(fs);<br/> return count;<br/> }<br/> catch (IOException ioex)<br/> {<br/> throw new IOException(ioex.Message);<br/> }<br/> catch (Exception ex)<br/> {<br/> throw new Exception(ex.Message);<br/> }<br/> finally<br/> {<br/> if (fs != null)<br/> {<br/> fs.Close();<br/> }<br/> }<br/> }
3.将excel中的数据导入到DataTable中:
/// <summary><br/> /// 将excel中的数据导入到DataTable中<br/> /// </summary><br/> /// <param name="sheetName">excel工作薄sheet的名称</param><br/> /// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param><br/> /// <param name="fileName">文件路径</param><br/> /// <returns>返回的DataTable</returns><br/> public static DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn, string fileName)<br/> {<br/> if (string.IsNullOrEmpty(sheetName))<br/> {<br/> throw new ArgumentNullException(sheetName);<br/> }<br/> if (string.IsNullOrEmpty(fileName))<br/> {<br/> throw new ArgumentNullException(fileName);<br/> }<br/> var data = new DataTable();<br/> IWorkbook workbook = null;<br/> FileStream fs = null;<br/> try<br/> {<br/> fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);<br/> if (fileName.IndexOf(".xlsx", StringComparison.Ordinal) > )<br/> {<br/> workbook = new XSSFWorkbook(fs);<br/> }<br/> else if (fileName.IndexOf(".xls", StringComparison.Ordinal) > )<br/> {<br/> workbook = new HSSFWorkbook(fs);<br/> } ISheet sheet = null;<br/> if (workbook != null)<br/> {<br/> //如果没有找到指定的sheetName对应的sheet,则尝试获取第一个sheet<br/> sheet = workbook.GetSheet(sheetName) ?? workbook.GetSheetAt();<br/> }<br/> if (sheet == null) return data;<br/> var firstRow = sheet.GetRow();<br/> //一行最后一个cell的编号 即总的列数<br/> int cellCount = firstRow.LastCellNum;<br/> int startRow;<br/> if (isFirstRowColumn)<br/> {<br/> for (int i = firstRow.FirstCellNum; i < cellCount; ++i)<br/> {<br/> var cell = firstRow.GetCell(i);<br/> var cellValue = cell.StringCellValue;<br/> if (cellValue == null) continue;<br/> var column = new DataColumn(cellValue);<br/> data.Columns.Add(column);<br/> }<br/> startRow = sheet.FirstRowNum + ;<br/> }<br/> else<br/> {<br/> startRow = sheet.FirstRowNum;<br/> }<br/> //最后一列的标号<br/> var rowCount = sheet.LastRowNum;<br/> for (var i = startRow; i <= rowCount; ++i)<br/> {<br/> var row = sheet.GetRow(i);<br/> //没有数据的行默认是null<br/> if (row == null) continue;<br/> var dataRow = data.NewRow();<br/> for (int j = row.FirstCellNum; j < cellCount; ++j)<br/> {<br/> //同理,没有数据的单元格都默认是null<br/> if (row.GetCell(j) != null)<br/> dataRow[j] = row.GetCell(j).ToString();<br/> }<br/> data.Rows.Add(dataRow);<br/> } return data;<br/> }<br/> catch (IOException ioex)<br/> {<br/> throw new IOException(ioex.Message);<br/> }<br/> catch (Exception ex)<br/> {<br/> throw new Exception(ex.Message);<br/> }<br/> finally<br/> {<br/> if (fs != null)<br/> {<br/> fs.Close();<br/> }<br/> }<br/> }
4.读取Excel文件内容转换为DataSet:
/// <summary><br/> /// 读取Excel文件内容转换为DataSet,列名依次为 "c0"……c[columnlength-1]<br/> /// </summary><br/> /// <param name="fileName">文件绝对路径</param><br/> /// <param name="startRow">数据开始行数(1为第一行)</param><br/> /// <param name="columnDataType">每列的数据类型</param><br/> /// <returns></returns><br/> public static DataSet ReadExcel(string fileName, int startRow, params NpoiDataType[] columnDataType)<br/> {<br/> var ds = new DataSet("ds");<br/> var dt = new DataTable("dt");<br/> var sb = new StringBuilder();<br/> using (var stream = new FileStream(fileName, FileMode.Open, FileAccess.Read))<br/> {<br/> //使用接口,自动识别excel2003/2007格式<br/> var workbook = WorkbookFactory.Create(stream);<br/> //得到里面第一个sheet<br/> var sheet = workbook.GetSheetAt();<br/> int j;<br/> IRow row;<br/> //ColumnDataType赋值<br/> if (columnDataType.Length <= )<br/> {<br/> //得到第i行<br/> row = sheet.GetRow(startRow - );<br/> columnDataType = new NpoiDataType[row.LastCellNum];<br/> for (var i = ; i < row.LastCellNum; i++)<br/> {<br/> var hs = row.GetCell(i);<br/> columnDataType[i] = GetCellDataType(hs);<br/> }<br/> }<br/> for (j = ; j < columnDataType.Length; j++)<br/> {<br/> var tp = GetDataTableType(columnDataType[j]);<br/> dt.Columns.Add("c" + j, tp);<br/> }<br/> for (var i = startRow - ; i <= sheet.PhysicalNumberOfRows; i++)<br/> {<br/> //得到第i行<br/> row = sheet.GetRow(i);<br/> if (row == null) continue;<br/> try<br/> {<br/> var dr = dt.NewRow(); for (j = ; j < columnDataType.Length; j++)<br/> {<br/> dr["c" + j] = GetCellData(columnDataType[j], row, j);<br/> }<br/> dt.Rows.Add(dr);<br/> }<br/> catch (Exception er)<br/> {<br/> sb.Append(string.Format("第{0}行出错:{1}\r\n", i + , er.Message));<br/> }<br/> }<br/> ds.Tables.Add(dt);<br/> }<br/> if (ds.Tables[].Rows.Count == && sb.ToString() != "") throw new Exception(sb.ToString());<br/> return ds;<br/> }
5.从DataSet导出到2003:
/// <summary><br/> /// 从DataSet导出到MemoryStream流2003<br/> /// </summary><br/> /// <param name="saveFileName">文件保存路径</param><br/> /// <param name="sheetName">Excel文件中的Sheet名称</param><br/> /// <param name="ds">存储数据的DataSet</param><br/> /// <param name="startRow">从哪一行开始写入,从0开始</param><br/> /// <param name="datatypes">DataSet中的各列对应的数据类型</param><br/> public static bool CreateExcel2003(string saveFileName, string sheetName, DataSet ds, int startRow, params NpoiDataType[] datatypes)<br/> {<br/> try<br/> {<br/> if (startRow < ) startRow = ;<br/> var wb = new HSSFWorkbook();<br/> var dsi = PropertySetFactory.CreateDocumentSummaryInformation();<br/> dsi.Company = "pkm";<br/> var si = PropertySetFactory.CreateSummaryInformation();<br/> si.Title =<br/> si.Subject = "automatic genereted document";<br/> si.Author = "pkm";<br/> wb.DocumentSummaryInformation = dsi;<br/> wb.SummaryInformation = si;<br/> var sheet = wb.CreateSheet(sheetName);<br/> //sheet.SetColumnWidth(0, 50 * 256);<br/> //sheet.SetColumnWidth(1, 100 * 256);<br/> ICell cell;<br/> int j;<br/> var maxLength = ;<br/> var curLength = ;<br/> object columnValue;<br/> var dt = ds.Tables[];<br/> if (datatypes.Length < dt.Columns.Count)<br/> {<br/> datatypes = new NpoiDataType[dt.Columns.Count];<br/> for (var i = ; i < dt.Columns.Count; i++)<br/> {<br/> var dtcolumntype = dt.Columns[i].DataType.Name.ToLower();<br/> switch (dtcolumntype)<br/> {<br/> case "string":<br/> datatypes[i] = NpoiDataType.String;<br/> break;<br/> case "datetime":<br/> datatypes[i] = NpoiDataType.Datetime;<br/> break;<br/> case "boolean":<br/> datatypes[i] = NpoiDataType.Bool;<br/> break;<br/> case "double":<br/> datatypes[i] = NpoiDataType.Numeric;<br/> break;<br/> default:<br/> datatypes[i] = NpoiDataType.String;<br/> break;<br/> }<br/> }<br/> } // 创建表头<br/> var row = sheet.CreateRow();<br/> //样式<br/> var style1 = wb.CreateCellStyle();<br/> //字体<br/> var font1 = wb.CreateFont();<br/> //字体颜色<br/> font1.Color = HSSFColor.White.Index;<br/> //字体加粗样式<br/> font1.Boldweight = (short)FontBoldWeight.Bold;<br/> //style1.FillBackgroundColor = HSSFColor.WHITE.index;<br/> style1.FillForegroundColor = HSSFColor.Green.Index;<br/> //GetXLColour(wb, LevelOneColor);// 设置图案色<br/> //GetXLColour(wb, LevelOneColor);// 设置背景色<br/> style1.FillPattern = FillPattern.SolidForeground;<br/> //样式里的字体设置具体的字体样式<br/> style1.SetFont(font1);<br/> //文字水平对齐方式<br/> style1.Alignment = HorizontalAlignment.Center;<br/> //文字垂直对齐方式<br/> style1.VerticalAlignment = VerticalAlignment.Center;<br/> row.HeightInPoints = ;<br/> for (j = ; j < dt.Columns.Count; j++)<br/> {<br/> columnValue = dt.Columns[j].ColumnName;<br/> curLength = Encoding.Default.GetByteCount(columnValue.ToString());<br/> maxLength = (maxLength < curLength ? curLength : maxLength);<br/> var colounwidth = * maxLength;<br/> sheet.SetColumnWidth(j, colounwidth);<br/> try<br/> {<br/> //创建第0行的第j列<br/> cell = row.CreateCell(j);<br/> //单元格式设置样式<br/> cell.CellStyle = style1; try<br/> {<br/> cell.SetCellType(CellType.String);<br/> cell.SetCellValue(columnValue.ToString());<br/> }<br/> catch (Exception ex)<br/> {<br/> throw new Exception(ex.Message);<br/> } }<br/> catch (Exception ex)<br/> {<br/> throw new Exception(ex.Message);<br/> }<br/> }<br/> // 创建每一行<br/> for (var i = startRow; i < ds.Tables[].Rows.Count; i++)<br/> {<br/> var dr = ds.Tables[].Rows[i];<br/> //创建第i行<br/> row = sheet.CreateRow(i + );<br/> for (j = ; j < dt.Columns.Count; j++)<br/> {<br/> columnValue = dr[j];<br/> curLength = Encoding.Default.GetByteCount(columnValue.ToString());<br/> maxLength = (maxLength < curLength ? curLength : maxLength);<br/> var colounwidth = * maxLength;<br/> sheet.SetColumnWidth(j, colounwidth);<br/> try<br/> {<br/> //创建第i行的第j列<br/> cell = row.CreateCell(j);<br/> // 插入第j列的数据<br/> try<br/> {<br/> var dtype = datatypes[j];<br/> switch (dtype)<br/> {<br/> case NpoiDataType.String:<br/> {<br/> cell.SetCellType(CellType.Numeric);<br/> cell.SetCellValue(columnValue.ToString());<br/> }<br/> break;<br/> case NpoiDataType.Datetime:<br/> {<br/> cell.SetCellType(CellType.Numeric);<br/> cell.SetCellValue(columnValue.ToString());<br/> }<br/> break;<br/> case NpoiDataType.Numeric:<br/> {<br/> cell.SetCellType(CellType.Numeric);<br/> cell.SetCellValue(Convert.ToDouble(columnValue));<br/> }<br/> break;<br/> case NpoiDataType.Bool:<br/> {<br/> cell.SetCellType(CellType.Numeric);<br/> cell.SetCellValue(Convert.ToBoolean(columnValue));<br/> }<br/> break;<br/> case NpoiDataType.Richtext:<br/> {<br/> cell.SetCellType(CellType.Numeric);<br/> cell.SetCellValue(columnValue.ToString());<br/> }<br/> break;<br/> }<br/> }<br/> catch (Exception ex)<br/> {<br/> cell.SetCellType(CellType.Numeric);<br/> cell.SetCellValue(columnValue.ToString());<br/> throw new Exception(ex.Message);<br/> }<br/> }<br/> catch (Exception ex)<br/> {<br/> throw new Exception(ex.Message);<br/> }<br/> }<br/> }<br/> //生成文件在服务器上<br/> using (var fs = new FileStream(saveFileName, FileMode.OpenOrCreate, FileAccess.Write))<br/> {<br/> wb.Write(fs);<br/> } return true;<br/> }<br/> catch (Exception er)<br/> {<br/> throw new Exception(er.Message);<br/> } }
6.从DataSet导出到MemoryStream流2007:
/// <summary><br/> /// 从DataSet导出到MemoryStream流2007<br/> /// </summary><br/> /// <param name="saveFileName">文件保存路径</param><br/> /// <param name="sheetName">Excel文件中的Sheet名称</param><br/> /// <param name="ds">存储数据的DataSet</param><br/> /// <param name="startRow">从哪一行开始写入,从0开始</param><br/> /// <param name="datatypes">DataSet中的各列对应的数据类型</param><br/> public static bool CreateExcel2007(string saveFileName, string sheetName, DataSet ds, int startRow, params NpoiDataType[] datatypes)<br/> {<br/> try<br/> {<br/> if (startRow < ) startRow = ;<br/> var wb = new XSSFWorkbook();<br/> var sheet = wb.CreateSheet(sheetName);<br/> ICell cell;<br/> int j;<br/> var maxLength = ;<br/> int curLength;<br/> object columnValue;<br/> var dt = ds.Tables[];<br/> if (datatypes.Length < dt.Columns.Count)<br/> {<br/> datatypes = new NpoiDataType[dt.Columns.Count];<br/> for (var i = ; i < dt.Columns.Count; i++)<br/> {<br/> var dtcolumntype = dt.Columns[i].DataType.Name.ToLower();<br/> switch (dtcolumntype)<br/> {<br/> case "string":<br/> datatypes[i] = NpoiDataType.String;<br/> break;<br/> case "datetime":<br/> datatypes[i] = NpoiDataType.Datetime;<br/> break;<br/> case "boolean":<br/> datatypes[i] = NpoiDataType.Bool;<br/> break;<br/> case "double":<br/> datatypes[i] = NpoiDataType.Numeric;<br/> break;<br/> default:<br/> datatypes[i] = NpoiDataType.String;<br/> break;<br/> }<br/> }<br/> }<br/> //创建表头<br/> var row = sheet.CreateRow();<br/> //样式<br/> var style1 = wb.CreateCellStyle();<br/> //字体<br/> var font1 = wb.CreateFont();<br/> //字体颜色<br/> font1.Color = HSSFColor.White.Index;<br/> //字体加粗样式<br/> font1.Boldweight = (short)FontBoldWeight.Bold;<br/> //style1.FillBackgroundColor = HSSFColor.WHITE.index;<br/> //GetXLColour(wb, LevelOneColor);<br/> // 设置图案色<br/> style1.FillForegroundColor = HSSFColor.Green.Index;<br/> //GetXLColour(wb, LevelOneColor);// 设置背景色<br/> style1.FillPattern = FillPattern.SolidForeground;<br/> //样式里的字体设置具体的字体样式<br/> style1.SetFont(font1);<br/> //文字水平对齐方式<br/> style1.Alignment = HorizontalAlignment.Center;<br/> //文字垂直对齐方式<br/> style1.VerticalAlignment = VerticalAlignment.Center;<br/> row.HeightInPoints = ;<br/> for (j = ; j < dt.Columns.Count; j++)<br/> {<br/> columnValue = dt.Columns[j].ColumnName;<br/> curLength = Encoding.Default.GetByteCount(columnValue.ToString());<br/> maxLength = (maxLength < curLength ? curLength : maxLength);<br/> var colounwidth = * maxLength;<br/> sheet.SetColumnWidth(j, colounwidth);<br/> try<br/> {<br/> //创建第0行的第j列<br/> cell = row.CreateCell(j);<br/> //单元格式设置样式<br/> cell.CellStyle = style1; try<br/> {<br/> cell.SetCellValue(columnValue.ToString());<br/> }<br/> catch (Exception ex)<br/> {<br/> throw new Exception(ex.Message);<br/> } }<br/> catch (Exception ex)<br/> {<br/> throw new Exception(ex.Message);<br/> }<br/> }<br/> // 创建每一行<br/> for (var i = startRow; i < ds.Tables[].Rows.Count; i++)<br/> {<br/> var dr = ds.Tables[].Rows[i];<br/> //创建第i行<br/> row = sheet.CreateRow(i + );<br/> for (j = ; j < dt.Columns.Count; j++)<br/> {<br/> columnValue = dr[j];<br/> curLength = Encoding.Default.GetByteCount(columnValue.ToString());<br/> maxLength = (maxLength < curLength ? curLength : maxLength);<br/> var colounwidth = * maxLength;<br/> sheet.SetColumnWidth(j, colounwidth);<br/> try<br/> {<br/> //创建第i行的第j列<br/> cell = row.CreateCell(j);<br/> // 插入第j列的数据<br/> try<br/> {<br/> var dtype = datatypes[j];<br/> switch (dtype)<br/> {<br/> case NpoiDataType.String:<br/> {<br/> cell.SetCellValue(columnValue.ToString());<br/> }<br/> break;<br/> case NpoiDataType.Datetime:<br/> {<br/> cell.SetCellValue(columnValue.ToString());<br/> }<br/> break;<br/> case NpoiDataType.Numeric:<br/> {<br/> cell.SetCellValue(Convert.ToDouble(columnValue));<br/> }<br/> break;<br/> case NpoiDataType.Bool:<br/> {<br/> cell.SetCellValue(Convert.ToBoolean(columnValue));<br/> }<br/> break;<br/> case NpoiDataType.Richtext:<br/> {<br/> cell.SetCellValue(columnValue.ToString());<br/> }<br/> break;<br/> }<br/> }<br/> catch (Exception ex)<br/> {<br/> cell.SetCellValue(columnValue.ToString());<br/> throw new Exception(ex.Message);<br/> }<br/> }<br/> catch (Exception ex)<br/> {<br/> throw new Exception(ex.Message);<br/> }<br/> }<br/> }<br/> //生成文件在服务器上<br/> using (var fs = new FileStream(saveFileName, FileMode.OpenOrCreate, FileAccess.Write))<br/> {<br/> wb.Write(fs);<br/> }<br/> return true;<br/> }<br/> catch (Exception er)<br/> {<br/> throw new Exception(er.Message);<br/> } }
7.读Excel-根据NpoiDataType创建的DataTable列的数据类型:
/// <summary><br/> /// 读Excel-根据NpoiDataType创建的DataTable列的数据类型<br/> /// </summary><br/> /// <param name="datatype"></param><br/> /// <returns></returns><br/> private static Type GetDataTableType(NpoiDataType datatype)<br/> {<br/> var tp = typeof(string);<br/> switch (datatype)<br/> {<br/> case NpoiDataType.Bool:<br/> tp = typeof(bool);<br/> break;<br/> case NpoiDataType.Datetime:<br/> tp = typeof(DateTime);<br/> break;<br/> case NpoiDataType.Numeric:<br/> tp = typeof(double);<br/> break;<br/> case NpoiDataType.Error:<br/> tp = typeof(string);<br/> break;<br/> case NpoiDataType.Blank:<br/> tp = typeof(string);<br/> break;<br/> }<br/> return tp;<br/> } /// <summary><br/> /// 读Excel-得到不同数据类型单元格的数据<br/> /// </summary><br/> /// <param name="datatype">数据类型</param><br/> /// <param name="row">数据中的一行</param><br/> /// <param name="column">哪列</param><br/> /// <returns></returns><br/> private static object GetCellData(NpoiDataType datatype, IRow row, int column)<br/> {<br/> switch (datatype)<br/> {<br/> case NpoiDataType.String:<br/> try<br/> {<br/> return row.GetCell(column).DateCellValue;<br/> }<br/> catch<br/> {<br/> try<br/> {<br/> return row.GetCell(column).StringCellValue;<br/> }<br/> catch<br/> {<br/> return row.GetCell(column).NumericCellValue;<br/> }<br/> }<br/> case NpoiDataType.Bool:<br/> try { return row.GetCell(column).BooleanCellValue; }<br/> catch { return row.GetCell(column).StringCellValue; }<br/> case NpoiDataType.Datetime:<br/> try { return row.GetCell(column).DateCellValue; }<br/> catch { return row.GetCell(column).StringCellValue; }<br/> case NpoiDataType.Numeric:<br/> try { return row.GetCell(column).NumericCellValue; }<br/> catch { return row.GetCell(column).StringCellValue; }<br/> case NpoiDataType.Richtext:<br/> try { return row.GetCell(column).RichStringCellValue; }<br/> catch { return row.GetCell(column).StringCellValue; }<br/> case NpoiDataType.Error:<br/> try { return row.GetCell(column).ErrorCellValue; }<br/> catch { return row.GetCell(column).StringCellValue; }<br/> case NpoiDataType.Blank:<br/> try { return row.GetCell(column).StringCellValue; }<br/> catch { return ""; }<br/> default: return "";<br/> }<br/> } /// <summary><br/> /// 获取单元格数据类型<br/> /// </summary><br/> /// <param name="hs">单元格对象</param><br/> /// <returns></returns><br/> private static NpoiDataType GetCellDataType(ICell hs)<br/> {<br/> NpoiDataType dtype;<br/> DateTime t1;<br/> var cellvalue = ""; switch (hs.CellType)<br/> {<br/> case CellType.Blank:<br/> dtype = NpoiDataType.String;<br/> cellvalue = hs.StringCellValue;<br/> break;<br/> case CellType.Boolean:<br/> dtype = NpoiDataType.Bool;<br/> break;<br/> case CellType.Numeric:<br/> dtype = NpoiDataType.Numeric;<br/> cellvalue = hs.NumericCellValue.ToString(CultureInfo.InvariantCulture);<br/> break;<br/> case CellType.String:<br/> dtype = NpoiDataType.String;<br/> cellvalue = hs.StringCellValue;<br/> break;<br/> case CellType.Error:<br/> dtype = NpoiDataType.Error;<br/> break;<br/> default:<br/> dtype = NpoiDataType.Datetime;<br/> break;<br/> }<br/> if (cellvalue != "" && DateTime.TryParse(cellvalue, out t1)) dtype = NpoiDataType.Datetime;<br/> return dtype;<br/> }
四.总结:
本文是接着上五篇介绍.NET组件,目的只是在于总结一些组件的用法,将文章作为一个引子,各位读者可以根据文章的介绍更加深入的去了解相关组件。有些地方写的有误,还望多多包涵和指正,欢迎大家给我建议介绍一些你们在项目中经常使用的组件,可以跟大家做一个分享。
.NET组件介绍系列:
一款开源免费的.NET文档操作组件DocX(.NET组件介绍之一)http://www.cnblogs.com/pengze0902/p/6122311.html
高效而稳定的企业级.NET Office 组件Spire(.NET组件介绍之二)http://www.cnblogs.com/pengze0902/p/6125570.html
最好的.NET开源免费ZIP库DotNetZip(.NET组件介绍之三)http://www.cnblogs.com/pengze0902/p/6124659.html
免费开源的DotNet二维码操作组件ThoughtWorks.QRCode(.NET组件介绍之四)http://www.cnblogs.com/pengze0902/p/6134506.html
免费开源的DotNet任务调度组件Quartz.NET(.NET组件介绍之五)http://www.cnblogs.com/pengze0902/p/6128558.html
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