C#使用NPOI將excel導入到list的方法
本文實例為大傢分享瞭C#使用NPOI將excel導入到list的具體代碼,供大傢參考,具體內容如下
這個是確定是實體類接收
/// <summary> /// 將excel導入到list /// </summary> /// <typeparam name="T"></typeparam> /// <param name="fs">Stream 文件流</param> /// <param name="list">轉換的Dictionary:例如 ("昵稱","nickname")</param> /// <returns></returns> public static List<T> ExcelToList<T>(this Stream fs, Dictionary<string, string> list) where T : class, new() { List<T> ts = new List<T>(); IWorkbook workbook = null; ISheet sheet = null; T t = new T(); List<string> listName = new List<string>(); try { // 獲得此模型的公共屬性 var propertys = t.GetType().GetProperties().ToList(); workbook = new HSSFWorkbook(fs); if (workbook != null) { sheet = workbook.GetSheetAt(0);//讀取第一個sheet,當然也可以循環讀取每個sheet if (sheet != null) { int rowCount = sheet.LastRowNum;//總行數 if (rowCount > 0) { IRow firstRow = sheet.GetRow(0);//第一行 int cellCount = firstRow.LastCellNum;//列數 //循環列數 for (int i = 0; i < cellCount; i++) { //循環需要轉換的值 foreach (var item in list) { if (item.Key.Equals(firstRow.GetCell(i).StringCellValue)) { //替換表頭 firstRow.GetCell(i).SetCellValue(item.Value); } } //獲取已經替換的表頭 var s = firstRow.GetCell(i).StringCellValue; //添加到listname listName.Add(s); } for (int i = 1; i <= rowCount; i++) { t = new T(); IRow currRow = sheet.GetRow(i);//第i行 for (int k = 0; k < cellCount; k++) { //取值 object value = null; if (currRow.GetCell(k) != null) { firstRow.GetCell(0).SetCellType(CellType.String); currRow.GetCell(k).SetCellType(CellType.String); value = currRow.GetCell(k).StringCellValue; } else { continue; } var Name = string.Empty; //獲取第表頭的值 Name = listName[k]; //循環屬性 foreach (var pi in propertys) { if (pi.Name.Equals(Name)) { //獲取屬性類型名稱 var s = pi.PropertyType.Name; //如果非空,則賦給對象的屬性 if (value != DBNull.Value) { //判斷屬性的類型(可以自行添加) switch (s) { case "Guid": pi.SetValue(t, new Guid(value.ToString()), null); break; case "Int32": pi.SetValue(t, value.ToString() == "" ? 0 : Convert.ToInt32(value.ToString()), null); break; case "Decimal": pi.SetValue(t, value.ToString() == "" ? 0 : Convert.ToDecimal(value.ToString()), null); break; case "DateTime": pi.SetValue(t, Convert.ToDateTime(value.ToString()), null); break; case "Double": pi.SetValue(t, value.ToString() == "" ? 0 : Convert.ToDouble(value.ToString()), null); break; case "String": pi.SetValue(t, value, null); break; default: break; } } } } } //對象添加到泛型集合中 ts.Add(t); } } } } return ts; } catch (Exception ex) { if (fs != null) { fs.Close(); } return null; } }
調用
var list = new Dictionary<string, string>(); list.Add("ID", "TradeAccountId"); list.Add("簡介", "Intro"); list.Add("昵稱1", "Nickname"); list.Add("限制人數", "SubscribeLimit"); list.Add("模式", "SubscribeMode"); list.Add("收益率", "ProfitRate"); list.Add("收益", "ProfitLossAmount"); list.Add("頭像", "Img"); list.Add("平臺名稱", "Name"); list.Add("用戶昵稱", "UserNickname"); FileStream fs = new FileStream(@"C:\Users\Administrator\Desktop\Test\Test\bin\Debug\Export\2021-04-27-14-46-36.xls", FileMode.Open); var list3 = fs.ExcelToList<Res_Signal>(list);
實體類
[Serializable] public class Res_Signal { /// <summary> /// 交易賬號ID /// </summary> public Guid TradeAccountId { get; set; } /// <summary> /// 交易賬號簡介 /// </summary> public String Intro { get; set; } /// <summary> /// 交易賬號昵稱 /// </summary> public String Nickname { get; set; } /// <summary> /// 訂閱限制值 /// </summary> public Int32 SubscribeLimit { get; set; } /// <summary> /// 訂閱模式 目前都是免費 0免費 1收費 /// </summary> public Int32 SubscribeMode { get; set; } /// <summary> /// 訂閱模式名稱 /// </summary> public String SubscribeMode_Des { get; set; } /// <summary> /// 平臺名稱 /// </summary> public String Name { get; set; } /// <summary> /// 頭像 /// </summary> public String HeadImg { get; set; } /// <summary> /// 用戶昵稱 /// </summary> public String UserNickname { get; set; } /// <summary> /// 訂閱人數 /// </summary> public Int32 SubscribeCount { get; set; } /// <summary> /// 平臺圖片 /// </summary> public String Img { get; set; } /// <summary> /// 收益率 /// </summary> public decimal ProfitRate { get; set; } /// <summary> /// 總收益 /// </summary> public decimal ProfitLossAmount { get; set; } }
以上就是本文的全部內容,希望對大傢的學習有所幫助,也希望大傢多多支持WalkonNet。
推薦閱讀:
- C#使用NPOI讀取excel轉為DataSet
- C#使用NPOI實現Excel導入導出功能
- C#實現字符串進制轉換方法匯總
- C#實現十六進制與十進制相互轉換以及及不同進制表示
- .NET6導入和導出EXCEL