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C# Winforms Download File From Database

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This..query..is..different..from..the..others..in..that..it..returns..only..a..single..rowWe..call..SaveAttachment,..which..is..explained..in..the..next..sectionYou.can't.vote.in.pollsThe.data.table.is.then.filled.using.the.data.adapterWhile.I.had.found.a.few.good.examples.showing.how.to.upload.files.to.a.binary.field.type.in.SQL.Server,.I.found.a.lack.of.good.samples.showing.how.to.retrieve.files.and.reverse.the.process

 

This.thread.has.encouraged.me.to.look.further.instead.of.just.taking.one.solution.for.granted.:pInnovartis...Embarcadero...SQL...Sentry...Sonasoft...SQLCentric...Golden...Gate...Software...CA...Idera...Red...Gate...Software...Lumigent...Quest...Software...ApexSQL...Discussions...about...Books...Discuss...Programming...Books......Discuss...XML...Books......Discuss...T-SQL...Books......Discuss...Data...Warehousing...Books......Discuss...SQL...Server...2000...Books...Discuss...DTS...Books......Discuss...SQL...Server...7.0...BooksNotification...Services...AdministrationArticle...DiscussionsFuture...Versions...SQL...12...Narrow...your...search...by...forum...Explore...Home...Latest...Popular...Calendar...Members...Who's...on...Moderators...Forums...SQL...Server...2016......SQL...Server...2016...-...Administration......SQL...Server...2016...-...Development...and...T-SQL...SQL...Server...2014......Administration...-...SQL...Server...2014......Development...-...SQL...Server...2014...SQL...Server...2012......SQL...2012...-...General......SQL...Server...2012...-...T-SQL...SQL...Server...vNext......SQL...Server...14...-...Administration......SQL...Server...14...-...Development...SQL...Server...2008......SQL...Server...2008...-...General......T-SQL...(SS2K8)......June...2007...CTP......Working...with...Oracle......July...CTP......SQL...Server...Newbies......Security...(SS2K8)......SQL...Server...2008...High...Availability......SQL...Server...2008...Administration......Data...Corruption...(SS2K8.../...SS2K8...R2)......SQL...Server...2008...Performance...Tuning...Cloud...Computing......SQL...Azure...-...Development......SQL...Azure...-...Administration......Amazon...AWS...and...other...cloud...vendors......General...Cloud...Computing...Questions...Reporting...Services......Reporting...Services......Reporting...Services...2005...Administration......Reporting...Services...2005...Development......Reporting...Services...2008/R2...Administration......Reporting...Services...2008...Development......SSRS...2012......SSRS...2014......SSRS...2016...Programming......Connecting......General......SMO/RMO/DMO......XML......Service...Broker......Powershell......Testing......TFS/Data...Dude/DBPro......SSDT......Continuous...Integration,...Deployment,...and...Delivery......R...Services...and...R...Language...Data...Warehousing......Integration...Services......Strategies...and...Ideas......Analysis...Services......Data...Transformation...Services...(DTS)......Performance...Point......Data...Mining......PowerPivot......R...language......Machine...Learning...Database...Design......Disaster...Recovery......Design...Ideas...and...Questions......Relational...Theory......Hardware......Virtualization...SQLServerCentral.com......Anything...that...is...NOT...about...SQL!......Contests!......Editorials......SQLServerCentral.com...Announcements......SQLServerCentral.com...Website...Issues......Suggestions......Tag...Issues...with...Content......Podcast...Feedback......SQLServerCentral.com...Test...Forum......Articles...Requested...SQL...Server...2005......Administering......Backups......Business...Intelligence......CLR...Integration...and...ProgrammingOnly..premade..in...net..nowKiranAn..in-memory..data..table..and..adapter..is..created..and..populated..using..a..query..string//..Jerry..0..Jens..3..9..Years..Ago..You..can..do..this..by..using..serialization..tooSo...why...wait!...Just...click...the...Ask...Now...button...and...ask...your...question...now

 

Stack...Overflow...Questions...Jobs...Documentation...beta...Tags...Users...current...community...help...chat...Stack...Overflow...Meta...Stack...Overflow...your...communities...Sign...up...or...log...in...to...customize...your...listSolution..2..AcceptSolution..RejectSolution..Check..the..following..article..&..thread..for..code..and..usage:..save,view,..remove..file..using..winforms..and..C#[^]....Permalink....Posted..5-Jan-12..23:40pm..Om..Prakash..Pant19.6K..Rate..this:....Please..Sign..up..or..sign..in..to..voteword.or.adobe.reader.0.JerryShaw.46.9.Years.Ago.rsimlote,.Files.or.any.binary.data.is.stored.in.SQl.Server.as.a.byte.arrayDon't...worry...about...the...app...config...file...-...it's...not...used...here...-...just...modify...this...line...in...the...frmMain.cs...area...as...appropriate...(line...16,...I...think)...=>...string...strSqlConn...=..."Data...Source=localhostsqlexpress;Initial...Catalog=db2;Integrated...Security=True";To..fix..this..issue..for..others..working..on..similar..projects,..I..created..a..small..WinForms..project..using..C#..and..Visual..Studio..2010..to..demonstrate..how..to..not..only..save..files..into..a..binary..field..type,..but..also..how..to..retrieve..themIn..this..example,..I..have..used..one..tables..as..below..Step-4:..Add..Entity..Data..Modelasked.7.years,.2.months.ago.viewed.12547.times.active.1.year,.3.months.ago.Related.67Advantages.of.SQL.Server.2008.over.SQL.Server.2005?115Using.SQL.Server.2008.and.SQL.Server.2005.and.date.time21Restore.SQL.Server.2008.DB.*to*.SQL.Server.20050Move.database.from.sql.server.2008.to.20052Work.with.SQL.Server.accounts.(2005.&.2008)1SqlException.when.upgrading.linq2sql.app.from.SQL.Server.2005.to.20081Restrict.access.to.SQL.SERVER.2005.or.2008.Express.database.to.my.c#.app2Changed.database.from.SQL.Server.2005.to.SQL.Server.20080winform.C#.using.sql.server.20080Migration.from.SQL.Server.2008.to.2005.Hot.Network.Questions.Can.someone.explain.the.contrastive..to.me?.KN.vs

 

Note...that...the...query...is...parameterized...this...time...-...attachidabout..us..tour..help..blog..chat..data..legal..privacy..policy..work..here..advertising..info..developer..jobs..directory..mobile..contact..us..feedback..Technology..Life../..Arts..Culture../..Recreation..Science..Other..Stack..Overflow..Server..Fault..Super..User..Web..Applications..Ask..Ubuntu..Webmasters..Game..Development..TeX..-..LaTeX..Software..Engineering..Unix..&..Linux..Ask..Different..(Apple)..WordPress..Development..Geographic..Information..Systems..Electrical..Engineering..Android..Enthusiasts..Information..Security..Database..Administrators..Drupal..Answers..SharePoint..User..Experience..Mathematica..Salesforce..ExpressionEngine..Answers..Cryptography..Code..Review..Magento..Signal..Processing..Raspberry..Pi..Programming..Puzzles..&..Code..Golf..more..(7)..Photography..Science..Fiction..&..Fantasy..Graphic..Design..Movies..&..TV..Music:..Practice..&..Theory..Seasoned..Advice..(cooking)..Home..Improvement..Personal..Finance..&..Money..Academia..more..(8)..English..Language..&..Usage..Skeptics..Mi..Yodeya..(Judaism)..Travel..Christianity..English..Language..Learners..Japanese..Language..Arqade..(gaming)..Bicycles..Role-playing..Games..Anime..&..Manga..Motor..Vehicle..Maintenance..&..Repair..more..(17)..MathOverflow..Mathematics..Cross..Validated..(stats)..Theoretical..Computer..Science..Physics..Chemistry..Biology..Computer..Science..Philosophy..more..(3)..Meta..Stack..Exchange..Stack..Apps..Area..51..Stack..Overflow..Talent..site..design../..logo....2017..Stack..Exchange..Inc;..user..contributions..licensed..under..cc..by-sa..3.0..with..attribution..required..rev..2017.4.28.25783..About.Us.Contact.Us.Copyright.Privacy.Policy.Terms.Of.Use.Advertise.Copyright..SpiderWorks.Technologies.Pvt.Ltd.,.Kochi,.India.You...can't...edit...your...own...postsstring..strQueryAllAttachments..=.."select..[id],..[fileName],..[fileSize]..from..[tblAttachments]..order..by..[fileName]";..string..strQueryGetAttachmentById..=.."select..*..from..[tblAttachments]..where..[id]..=..attachId";..string..strQueryAllAttachmentsAllFields..=.."select..*..from..[tblAttachments]";..The..data..grid..Here..we..have..the..main..form..load..event,..which..sets..the..connection..string..and..will..fill..the..grid..view..in..the..form..with..all..the..attachmentsYou...can...download...attachmentsThis...is...a...blob...field...that...allows...any...content...you...wantThis...function...can...be...used...for...each...data...grid...refreshBut.the.varchar.column.only.allows.char.type.but.serialization.moves.data.as.XML.anyway,.so.that.is.not.a.problemThis...will...allow...the...program...to...open...the...targeted...file...with...read-only...access

 

Notify...me...by...email...when...others...post...comments...to...this...articleResourcesCode...SnippetsWinforms...Controls...How...to...upload...and...download...files...using...database...in...C#.NET...windows...application?...Posted...Date:...19...Feb...2012...Updated:...19-Feb-2012...Category:...Winforms...Controls...Author:...Ravindran...Member...Level:...Diamond...Points:...15......In...this...article...I...have...explained...in...detail...about...file...upload...and...download...using...database...in...windows...applicationWhat...about...converting...into...binary...and...then...saving...into...DB...Something...as...followswill...work...To...save...string...filePath...=..."";...string...connectionString...=..."";...FileStream...stream...=...new...FileStream(filePath,...FileMode.Open,...FileAccess.Read);...BinaryReader...reader...=...new...BinaryReader(stream);...byte[]...file...=...reader.ReadBytes((int)stream.Length);...reader.Close();...stream.Close();...SqlCommand...command;...SqlConnection...connection...=...new...SqlConnection(connectionString);...command...=...new...SqlCommand("INSERT...INTO...FileTable...(File)...Values(File)",...connection);...command.Parameters.Add("File",...SqlDbType.Binary,...file.Length).Value...=...file;...connection.Open();...command.ExecuteNonQuery();...Retrieval...is...a...bit...complicated...process...as...follows...SqlConnection...connection...=...new...SqlConnection("");...string...query...=..."...SELECT...File...FROM...FileTable...where...FileID...="...+...125;...SqlCommand...command...=...new...SqlCommand(query,...connection);...FileStream...stream;...BinaryWriter...writer;...int...bufferSize...=...100;...byte[]...outByte...=...new...byte[bufferSize];...long...retval;...long...startIndex...=...0;...string...pubID...=..."";...connection.Open();...SqlDataReader...reader...=...command.ExecuteReader(CommandBehavior.Default);...while...(reader.Read())...{...pubID...=...reader.GetString(0);...stream...=...new...FileStream("abc.docx",...FileMode.OpenOrCreate,...FileAccess.Write);...writer...=...new...BinaryWriter(stream);...startIndex...=...0;...retval...=...reader.GetBytes(1,...startIndex,...outByte,...0,...bufferSize);...while...(retval...==...bufferSize)...{...writer.Write(outByte);...writer.Flush();...startIndex...+=...bufferSize;...retval...=...reader.GetBytes(1,...startIndex,...outByte,...0,...bufferSize);...}...writer.Write(outByte,...0,...(int)retval...-...1);...writer.Flush();...writer.Close();...stream.Close();...}...reader.Close();...connection.Close();...Have...look...at...following...articles...for...help...and...details...Saving:...Retreival...:...shareimprove...this...answer...edited...Feb...14...'10...at...19:29...answered...Feb...13...'10...at...21:16...Asad...Butt...11.7k85889.........Thanks...this...seem...to...be...the...oneFirstly..the..ID..of..the..File..is..determined..using..the..CommandArgument..property..of..the..LinkButton..and..then..the..File..data,..i.e.

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