asp.net - Specified cast is not valid when reading a Float column -


well stuck... again. sailing smooth until now. reading data db (something usual) giving me specified cast not valid error. not first time i've dealt error; earlier on had date column. anyway, have table need read. data type float. code using:

dim rdr = sqlcmd.executereader while rdr.read     theresults.add(new userdata {         .balavailable = rdr.getfloat(0),         .branch = rdr.getint32(1)      }) end while

this running under function; class...

class userdata     dim theresults = new list(of userdata)      property branch integer     property balavailable single  end class

and input part...

dim clientno integer = 0 dim myresults = getdata(clientno) if integer.tryparse(txtinput.text, clientno)     if myresults.count = 1         txtbalavail.text = cint(myresults(0).balavail)     else

everytime input value gives me specified cast not valid error. 

system.data.sqlclient.sqlbuffer.get_int32() +5270501 system.data.sqlclient.sqldatareader.getint32(int32 i) +62

i believe related statements use?

imports system.data imports system.data.sqlclient imports system.configuration

i stuck. tried changing rdr.getfloat double, , in integer.tryparse double.tryparse. stuck!

the strongly-typed get... methods (getfloat, getint32, etc.) work if data-type of field exact match.

use getfieldtype method examine real data-type of field, , either use appropriate strongly-typed get... method, or untyped getvalue method.


Comments

Post a Comment

Popular posts from this blog

linux - Does gcc have any options to add version info in ELF binary file? -

i mean whether gcc can insert source code version infor elf binary section or similar. not want change source file, add info gcc option in makefile. you can emit version info text file, turn text file object file statically link executable. the first step simple have write code: script or write version info in format plain text file. write makefile rule produce version.o version.txt, using objcopy . you'll have object file 2 useful symbols defined in it: beginning , end of textual version info. add generated object executable, , you'll able access version 2 ways: running strings on binary, or writing code in application print version string (you'll need declare start , end symbols variables in header file).
Read more

java - Are there any classes that implement javax.persistence.Parameter<T>? -

i'm using named queries fetch entities database using jpa , hibernate , came across puzzling me: how come there no default implementations of javax.persistence.parameter interface? i rather impressed how @staticmetamodel used criteriabuilder in jpa2 meaning type safety , don't have mess around setting string names. wanted apply similar of jpa1 ejb's i'm working on: dealergroup_.class: public dealergroup_ { public parameter<integer> id = new parameterimpl<integer>("id"); /// etc... } dealergroupfacade.class: // ... public dealergroup fetch(integer id) { typedquery<dealergroup> query = em.createnamedquery("dealergroup.fetchbyid", dealergroup.class); query.setparameter(dealergroup_.id, query); return query.getsingleresult(); } // ... i surprised find there no implementations of parameter interface - of course, implement myself absence makes me suspicious may mistake using in way? should implementing parameter...
Read more

android - send complex objects as post php java -

is possible send contact numbers via post php class inside eclipse ? or post limited primitive types , have find work arounds send them string ? i propose: send them json in post request, befor start, have @ gson project , keep in mind set content application -> json. luck
Read more