c# - threading problem (reading and writing to one excel file) -

-

i have application, something. generaly main task analise , drawing charts after getting data excel file. application can @ same time max. 10 analise , each of them execute in separate thread in separate tabpage control. great moment when appearing 3 problems.

  1. i can't reading data 1 excel file few analises. if i'm using 1 file 1 analise , want use same file it's not possible beacuse there massage file acctually using process. read data excel file i'm using oledbconnection schema. how solve problem.

  2. i have same problem write data 1 file. how force application write same message different threads 1 file.

  3. if want close application (when 1 of analise working) there show me message communication: "interruption lasted thread (or that)". don't know why. support

please me solve problems beacuse i'm trying solve sice monday , there no effect :(

possible example

string  fullexcelfilepath = "c:\excelfile.xls";   excel.application xlapp = new excel.application()  excel.workbook xlworkbook1 = xlapp.workbooks.add(fullexcelfilepath); excel.workbook xlworkbook2 = xlapp.workbooks.add(fullexcelfilepath);  //then in first threadcall foreach(excel.worksheet in xlworkbook1.sheets) { //get want }   //then in 2nd threadcal foreach(excel.worksheet in xlworkbook2.sheets) { //get want }

other option is:

you make copy of xls other thread, ,

use copy of xls file in other thread.

file.copy(strfilename, strdestination);

then afterwards delete it

file.delete(strfilenamesecondversion)

Comments

Post a Comment

Popular posts from this blog

Javascript line number mapping -

-
magically formatted comments change reported line number of javascript errors in browsers; this: //@line n "f" n line number , f file name. unfortunately, //@line appears ungoogleable. know there documentation on feature, , browsers support it? (i found references here , here .) from can find available in mozilla based browsers. it using js_setoptions command can turn these options on or off depending on values passed. https://developer.mozilla.org/en/js_setoptions
Read more

c# - Is it possible to remove an existing registration from Autofac container builder? -

-
something along lines: builder.registertype<mytype>().as<itype>(); builder.registertype<mytype2>().as<itype>(); builder.deregistertype<mytype>().as<itype>() var container = builder.build(); var types = container.resolve<ienumerable<itype>>(); assert.istrue(types.count == 1); assert.istrue(types[0].gettype == typeof(mytype2)); scenario: go through bunch of assemblies , go register types want make sure have 1 implementation of given type. need before create container. track on own nice if autofac me bit. this cannot done directly using containerbuilder , unless start on new one. mind you, having first built container should able construct new container filtering away unwanted types , reusing registrations first container. this: ... var container = builder.build(); builder = new containerbuilder(); var components = container.componentregistry.registrations .where(cr => cr.activator.limittype != typ...
Read more

php - Mysql PK and FK char(36) vs int(10) -

-
i have read mysql can handle indexes , searches better if tables keys integers rather char(36) uuid's. is worth converting int(10)? note: use 1 server , have have plans use multiple databases concurrently therefore removing 1 of big reasons using uuid. our tables innodb if makes difference. thanks in advance. usually rdbms can handle integer keys pk more efficient, other datatypes. reason how build index column, yes: long dont require string (or other typed) keys, should use integers. however: char(36) , int(10) far away being equal, because int(10) much smaller, char(36). dont know, if require many different keys, should keep in mind. update, complete last paragraph: int(10) 32-bit, char(36) 36 - ^byte^ (= 288-bit). not mean, int consumes less space, means, char(36) has 4 times more different keys.
Read more