1、文件上传下载（MVC应用）
视图：form表单，编码方式为multipart/form-data
<body>
<div>
<form action="/Demo/FileUpload" enctype="multipart/form-data" method="post">
<input id="f1" type="file" name="f1" />
<input id="Submit1" type="submit" value="上传" />
</form>
<a href="/Demo/FileDownLoad">下载</a>
</div>
</body>
控制器
public ActionResult FileUpLoad(HttpPostedFileBase f1) { string path = Server.MapPath("~/Picture"); string filename = Path.Combine(path,f1.FileName); f1.SaveAs(filename); return Content("OK"); } public ActionResult FileDownLoad() { string path = Server.MapPath(@"C:UsersAdministratorDesktop自己练习上传下载UpLoadUpLoadPictureQQ图片20190228155326.png"); FileStream fs = new FileStream(path,FileMode.Open); return File(fs,"text/plain","a.jpg"); }
2、将Excal导入datatable（控制台应用）
static void Main(string[] args) { Workbook wk = new Workbook(@"C:UsersadminDesktopuser.xlsx"); //获取数据所在的单元格 Cells cells = wk.Worksheets[0].Cells; for (int i = 0; i < cells.MaxDataRow; i++) { for (int j = 0; j < cells.MaxDataColumn; j++) { Console.Write(cells[i,j].Value+" "); } } Console.ReadKey(); }
3、提取数据库数据到Excel（控制台应用）
//提取数据到Excal static void Main(string[] args) { //读取证书 License license = new License(); license.SetLicense(@"C:UsersadminDesktop自己练习表达式树从数据库中读取数据到ExcalAidLicense.lic"); DataTable dt = GetDataTable(); //全新的工作簿 Workbook wb = new Workbook(); //工作表 Worksheet ws = wb.Worksheets[0]; ws.Cells.ImportDataTable(dt,true,"A1"); wb.Save(@"C:UsersadminDesktop\user.xlsx",SaveFormat.Xlsx); Console.WriteLine("读取成功"); Console.ReadKey(); } public static DataTable GetDataTable() { string sql = "select * from Student"; return DBHelper.GetDataTable(sql); }
4、Word读取（控制台应用）
static void Main(string[] args) { using (StreamReader reader = new StreamReader(@"D:《雪中悍刀行》作者：烽火戏诸侯.txt", Encoding.Default)) { string line; while ((line = reader.ReadLine()) != null) { Console.WriteLine(line); } } Console.ReadKey(); }
5、Word写入（控制台应用）
static void Main(string[] args) { if (File.Exists(@"C:UsersAdministratorDesktop新建 Microsoft Word 文档")) { Console.WriteLine("文件已存在"); } FileStream fs = new FileStream(@"C:UsersAdministratorDesktop新建 Microsoft Word 文档", FileMode.Create); StreamWriter sw = new StreamWriter(fs); sw.WriteLine("床前明月光"); sw.WriteLine("疑是地上霜"); sw.Close(); fs.Close(); Console.WriteLine("写入成功"); Console.ReadKey(); }