NPOI generates and downloads excel files, and NPOI generates and downloads excel files

NPOI generates and downloads excel files, and NPOI generates and downloads excel files

NPIO file: http://npoi.codeplex.com/

Directly reference the file to the project ,,,,,

Although there are a lot of online materials, you may not be able to find the functions you want. Today, I am idle, so I just sorted out a simple example and hope I can use them in future projects, you don't need to search for the code on the Internet. just copy the code ~~~~ I typed it in the mvc controller and pasted the Code directly .....

1,Logic code

Public EmptyResult ExportExcle () {HSSFCellStyle style; HSSFFont font; # if DEBUG UserInfo u = new UserInfo (); List <UserInfo> list = u. getDate (); string url = Server. mapPath (@ "\ Content \ File \ MyBook.xls"); string sheetName = "MySheet"; # endif HSSFWorkbook hssfworkbook = new HSSFWorkbook (); FileStream filecreate = new FileStream (url, FileMode. create, FileAccess. readWrite); // create a worksheet HSSFSheet sheet = hssfworkbook. createSheet (sheetName) as HSSFSheet; IRow row = sheet. createRow (0); row. createCell (0 ). setCellValue ("User ID"); row. createCell (1 ). setCellValue ("username"); row. createCell (2 ). setCellValue ("gender"); row. createCell (3 ). setCellValue ("Age"); row. createCell (4 ). setCellValue ("phone"); row. createCell (5 ). setCellValue ("ID card"); // row Height row. heightInPoints = 20; // set the style (alignment, border, Font, and background color) for the header cell List <ICell> cell = row. cells; style = hssfworkbook. createCellStyle () as HSSFCellStyle; font = hssfworkbook. createFont () as HSSFFont; font. isBold = true; // bold font. fontName = ""; font. color = HSSFColor. red. index; // font color style. setFont (font); this. cellStyle (style, sheet); style. fillForegroundColor = NPOI. HSSF. util. HSSFColor. green. index; style. fillPattern = FillPattern. solidForeground; cell. forEach (delegate (ICell c) {c. cellStyle = style ;}); // loads the content if (list. any () {style = hssfworkbook. createCellStyle () as HSSFCellStyle; this. cellStyle (style, sheet); for (int I = 0; I <list. count; I ++) {row = sheet. createRow (I + 1); row. heightInPoints = 20; row. createCell (0 ). setCellValue (list [I]. userId); row. createCell (1 ). setCellValue (list [I]. userName); row. createCell (2 ). setCellValue (list [I]. sex); row. createCell (3 ). setCellValue (list [I]. age); row. createCell (4 ). setCellValue (list [I]. tel); row. createCell (5 ). setCellValue (list [I]. idCard); cell = row. cells; cell. forEach (p => p. cellStyle = style) ;}}// write the stream to the excel file hssfworkbook. write (filecreate); filecreate. close (); # region download file FileStream fileopen = new FileStream (url, FileMode. open); byte [] bytes = new byte [(int) fileopen. length]; fileopen. read (bytes, 0, bytes. length); Response. contentType = "application/octet-stream"; Response. addHeader ("Content-Disposition", "attachment; filename =" + HttpUtility. urlEncode ("MyBook.xls", System. text. encoding. UTF8); Response. binaryWrite (bytes); fileopen. close (); Response. flush (); Response. end (); return new EmptyResult (); # endregion}

 2. Cell Style

/// <Summary> /// style /// </summary> /// <param name = "style"> </param> /// <param name =" sheet "> </param> private void CellStyle (HSSFCellStyle style, HSSFSheet) {// wrap style automatically. wrapText = true; // border style. borderBottom = BorderStyle. thin; style. borderLeft = BorderStyle. thin; style. borderRight = BorderStyle. thin; style. borderTop = BorderStyle. thin; // alignment style. alignment = HorizontalAlignment. center; style. verticalAlignment = verticalignment. center; // set the width of the fourth and fifth columns. setColumnWidth (4, 20*256); sheet. setColumnWidth (5, 30*256 );}

3. Data sources

Private class UserInfo {public int UserId {get; set;} public string UserName {get; set;} public string Sex {get; set;} public int Age {get; set ;} public string Tel {get; set;} public string IdCard {get; set;} public List <UserInfo> GetDate () {List <UserInfo> list = new List <UserInfo> () {new UserInfo {UserId = 1, UserName = "Zhang San", Sex = "male", Age = 20, Tel = "18217722343", IdCard = "150726198810235436 "}, new UserInfo {UserId = 2, UserName = "", Sex = "female", Age = 23, Tel = "18217722343", IdCard = "150726198810235436 "}, new UserInfo {UserId = 3, UserName = "", Sex = "male", Age = 21, Tel = "18217722343", IdCard = "150726198810235436 "}, new UserInfo {UserId = 4, UserName = "Zhao ", Sex = "female", Age = 30, Tel = "18217722343", IdCard = "150726198810235436 "}, new UserInfo {UserId = 5, UserName = "Qian Qi", Sex = "male", Age = 45, Tel = "18217722343", IdCard = "150726198810235436 "}, new UserInfo {UserId = 6, UserName = "Zhang San", Sex = "female", Age = 18, Tel = "18217722343", IdCard = "150726198810235436 "}}; return list ;}}

4. Front-end code

I encountered a problem before, because at first I used the Ajax Method for submission, so I could not see the download prompt box in the browser. Finally, I spent half a day, because the submission method was incorrect, change to location.

<! DOCTYPE html> 
5. Foreground page Effects
 
6. Open Excel

Well, I will introduce it here. I hope it will be helpful to you ~~~~