Excel Scientific Notation以编程方式在C＃中进行字符串转换

Question

what i've already done...

1. reading the excel file content into datatable

2. one of column contains data in scientific notation (eg 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(); 

   how can scientific notation be converted to actual data (eg 6754357899912)

Answer 1

Try using this:

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

*NB that when you hover the value in c# it'll look like sci still but it is indeed a double.