Excel Scientific Notation以編程方式在C＃中進行字符串轉換

Question

我已經做了...

1. 將Excel文件內容讀取到數據表中

2. 列之一包含科學計數形式的數據（例如6.75436E + 12）

     string filename = Server.MapPath("testfile.xlsx"); string conStr = ""; string Extension = ".xlsx"; switch (Extension) { case ".xls": //Excel 97-03 conStr = ConfigurationManager.ConnectionStrings["Excel03ConString"] .ConnectionString; break; case ".xlsx": //Excel 07 conStr = ConfigurationManager.ConnectionStrings["Excel07ConString"] .ConnectionString; break; } conStr = String.Format(conStr, filename, "Yes"); OleDbConnection connExcel = new OleDbConnection(conStr); OleDbCommand cmdExcel = new OleDbCommand(); OleDbDataAdapter oda = new OleDbDataAdapter(); DataTable dt = new DataTable(); cmdExcel.Connection = connExcel; //Get the name of First Sheet connExcel.Open(); DataTable dtExcelSchema; dtExcelSchema = connExcel.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null); string SheetName = dtExcelSchema.Rows[0]["TABLE_NAME"].ToString(); connExcel.Close(); //Read Data from First Sheet connExcel.Open(); cmdExcel.CommandText = "SELECT * From [" + SheetName + "]"; oda.SelectCommand = cmdExcel; oda.Fill(dt); connExcel.Close(); 

   科學計數法如何轉換為實際數據（例如6754357899912）

Answer 1

嘗試使用此：

double result = Double.Parse("6.75436E+12", System.Globalization.NumberStyles.Float);

*注意，當您將值懸停在c＃中時，它看起來仍然像sci，但實際上是兩倍。