sql server - c# Local Database insert into doesn't work -


i tried many times insertion doesn't work! please me..

codes:

sqlconnection conn = new sqlconnection(@"data source=(localdb)\v11.0;attachdbfilename=|datadirectory|\database1.mdf;integrated security=true"); conn.open(); sqlcommand cmd = new sqlcommand("insert mytbl(id, nav) values('yek','du')", conn); //yek , du examples //following command doesn't work, //"insert mytbl(id, nav) values('"+tb.text+"','"+tb2.text+"')" cmd.executenonquery(); conn.close();

the whole user instance , attachdbfilename= approach flawed - @ best! when running app in visual studio, copying around .mdf file (from app_data directory output directory - typically .\bin\debug - app runs) , most likely, insert works fine - you're looking @ wrong .mdf file in end!

if want stick approach, try putting breakpoint on myconnection.close() call - , inspect .mdf file sql server mgmt studio express - i'm data there.

the real solution in opinion

  1. install sql server express (and you've done anyway)

  2. install sql server management studio express

  3. create database in ssms express, give logical name (e.g. victorydatabase)

  4. connect using logical database name (given when create on server) - , don't mess around physical database files , user instances. in case, connection string like:

    data source=.\\sqlexpress;database=victorydatabase;integrated security=true

    and else exactly same before...

also see aaron bertrand's excellent blog post bad habits kick: using attachdbfilename more background info.


-

Comments

Post a Comment

Popular posts from this blog

c# - Binding a comma separated list to a List<int> in asp.net web api -

the default binder in web api expecst http://url.com/webapi/report/?pageids=3243&pageids=2365 to bind public ihttpactionresult report(list<int> pageids){ // exciting webapi code} i wish bind http://url.com/webapi/report/?pageids=3243,2365 as running out of space in url get . i have created class public class commaseparatedmodelbinder : system.web.http.modelbinding.imodelbinder { public bool bindmodel(httpactioncontext actioncontext, modelbindingcontext bindingcontext) { //binding in here } } and registered in webapiconfig.cs var provider = new simplemodelbinderprovider( typeof(list<int>), new commaseparatedmodelbinder()); config.services.insert(typeof(modelbinderprovider), 0, provider); i have altered method signature use model binder so public ihttpactionresult report( [modelbinder] list<int> pageids){ // exciting webapi code} however break point in binder not being
Read more

Delphi 7 and decode UTF-8 base64 -

in delphi 7, have widestring encoded base64(that received web service widestring result) : pd94bwwgdmvyc2lvbj0ims4wij8+dqo8c3ryaw5nptiq2lpyqjwvc3ryaw5npg== when decoded it, result not utf-8: <?xml version="1.0"?> <string>طھط³طھ</string> but when decoded base64decode.org, result true : <?xml version="1.0"?> <string>تست</string> i have use encddecd unit decodestring function. the problem have using decodestring . function, in delphi 7, treats decoded binary data being ansi encoded. , problem text utf-8 encoded. to continue encddecd unit have couple of options. can switch decodestream . instance, code produce utf-8 encoded text file data: {$apptype console} uses classes, encddecd; const data = 'pd94bwwgdmvyc2lvbj0ims4wij8+dqo8c3ryaw5nptiq2lpyqjwvc3ryaw5npg=='; var input: tstringstream; output: tfilestream; begin input := tstringstream.create(data); try output := tfilestream.
Read more

html - Is there any way to exclude a single element from the style? (Bootstrap) -

so, have img logo, overlaid on div styled background-image: url("...") , , both elements inside 2 div classes .to-color , .to-overlay respectively, black transparent overlay. is there way exclude logo style given these 2 classes? here's jsfiddle example: link html , css example: - html - <div class="to-color"> <div class="to-overlay"> <div class="respo"> <div class="row"> <div class="col-xs-4 col-xs-offset-4 text-center"> <img src="http://ansonalex.com/wp-content/uploads/2011/06/google-logo-768x260.png" alt="..." class="img-responsive"> </div> </div> </div> </div> </div> - css - .to-color { background-color: #000; } .to-overlay { opacity : 0.5; } .respo { background-image: url("https://source.unsplash.com/category/objects/1600x900"); background-position: center center;
Read more