c# - SQLBulkCopy - WriteToServer method not working -


i'm trying export data excel file mdf database. that, i'm using excel data reader , sql bulk copy : 

using system; using system.collections.generic; using system.linq; using system.text; using system.io; using excel; using system.data; using system.diagnostics; using system.data.sqlclient;  namespace bulktest {     class program     {         static void main(string[] args)         {             filestream fs = file.open(@"c:\users\maarab\desktop\list_personnel 2013.xlsx", filemode.open, fileaccess.read);             iexceldatareader excelreader = excelreaderfactory.createopenxmlreader(fs);              datatable dt = createdatatable();              string cx = @"data source=.\sqlexpress;attachdbfilename=|datadirectory|\datatest.mdf;integrated security=true;user instance=true";             sqlbulkcopy bcp = new sqlbulkcopy(cx, sqlbulkcopyoptions.keepidentity);               bool first = true;              while (excelreader.read())             {                 if (first)                 {                     first = false;                 }                  else                 {                     if (string.isnullorwhitespace(excelreader.getstring(0)))                         break;                      else                     {                         string numnat = excelreader.getstring(2);                         datetime birthdate = excelreader.getdatetime(9);                         datetime startdate = excelreader.getdatetime(1);                          if (!string.isnullorwhitespace(numnat))                         {                             if (numnat.length == 12)                             {                                 numnat = numnat.remove(6, 1);                             }                         }                          if (birthdate.year < 1753)                             birthdate = datetime.now;                          if (startdate.year < 1753)                             startdate = datetime.now;                          dt.rows.add(excelreader.getstring(0), excelreader.getstring(0), numnat, startdate, birthdate);                      }                 }             }              bcp.destinationtablename = "person";             bcp.batchsize = 100;              bcp.columnmappings.add(0, 1);             bcp.columnmappings.add(1, 2);             bcp.columnmappings.add(2, 3);             bcp.columnmappings.add(3, 4);             bcp.columnmappings.add(4, 5);              try             {                 bcp.writetoserver(dt, datarowstate.unchanged);             }             catch (exception e)             {                 console.writeline(e.message);             }               console.readline();          }           public static datatable createdatatable()         {             datatable dt = new datatable();              dt.columns.add("firstname", typeof(string));             dt.columns.add("lastname", typeof(string));             dt.columns.add("numnat", typeof(string));             dt.columns.add("birthdate", typeof(datetime));             dt.columns.add("startdate", typeof(datetime));              return dt;         }     } }

i'm filling datatable excel file , goes good. program running without problem unfortunatelly there's no insert table. idea solve that?

if @ table using server explorer should check connection used in window. happens have database file listed in project files , connection used server explorer points file in project folder.
of course, when program runs, connection used 1 specified in app.config.
in scenario have no error (because no error exists) server explorer wrong database no action occured , can't see updates.
solution easy, need reconfigure connection used server explorer point effective value of |datadirectory| substitution string (usually bin\debug or bin depending on project type)


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