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  • SqlCeException: The column cannot be modified. [ Column name = id ]

    - by pek
    I am simply trying to add a single row in the database but I keep getting an exception. I created a local database and added a single table: users. It consists of two columns: "id" and "name". I only made the id primary key (not auto-increment or anything else). When I run the following code: string execPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().GetName().CodeBase); string dbfile = execPath + @"\LocalDatabase.sdf"; SqlCeConnection conn = new SqlCeConnection("datasource=" + dbfile); conn.Open(); string command = "INSERT INTO users VALUES('1','pek')"; Debug.WriteLine(command); SqlCeCommand comm = conn.CreateCommand(); comm.CommandText = command; comm.ExecuteNonQuery(); I get the following Exception at "comm.ExecuteNonQuery();": SqlCeException was unhandled The column cannot be modified. [ Column name = id ] What's with the "modified" part?

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  • .NET Access automation with Access 2007 Runtime

    - by Robert Morgan
    I'm having trouble deploying .NET application which uses Microsoft Access automation. I've installed the Access 2007 Runtime and Primary Interop Assemblies (PIAs) on the target machine: Access 2007 Runtime Office 2007 PIAs However, when I try to create the ApplicationClass: Application access = new ApplicationClass(); I get the following exception: Unhandled Exception: System.Runtime.InteropServices.COMException (0x80080005): Retrieving the COM class factory for component with CLSID {73A4C9C1-D68D-11D0-98BF-00A0C90DC8D9} failed due to the following error: 80080005. I've googled the error code and tried tweaking the security settings in dcomcnfg, to no avail. Any ideas? I don't want to install the full version of Access due to the cost, and the runtime should at least be able to create an instance of the application, surely?

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  • Very large database, very small portion most being retrieved in real time

    - by ming yeow
    Hi folks, I have an interesting database problem. I have a DB that is 150GB in size. My memory buffer is 8GB. Most of my data is rarely being retrieved, or mainly being retrieved by backend processes. I would very much prefer to keep them around because some features require them. Some of it (namely some tables, and some identifiable parts of certain tables) are used very often in a user facing manner How can I make sure that the latter is always being kept in memory? (there is more than enough space for these) More info: We are on Ruby on rails. The database is MYSQL, our tables are stored using INNODB. We are sharding the data across 2 partitions. Because we are sharding it, we store most of our data using JSON blobs, while indexing only the primary keys

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  • QT4 - MDI model or Dock Windows?

    - by umanga
    Greetings, In the QT application we develop we need to display several 'Viewer windows'(to display data in XY plane ,YX plane,XZ plane and in 3D). We were hoping to use MDI application model ,but later client asked for a requirement to drag and view 'Viewer windows' in multiple desktops.(using multiple monitors). This can not be done using MDI window model ,because we cannot move MDI window outside the Main Application Window. Only possible way is to use Dock windows because they can be undocked from Main Application Window and move into other desktops, but Dock windows primary used for tool-palettes or utility windows. (http://doc.qt.nokia.com/4.6/qdockwidget.html#details) Is it a good practice to use Dock window for our requirement? thanks in advance.

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  • Populate Android Database From CSV file?

    - by MoMo
    Is it possible to take a csv file stored in the res/raw resource directory and use it to populate a table in the sqlite3 database? My thought was that, if there was a way to do a bulk import for the entire file into the table then that would be cleaner and faster than iterating over each line in the file and executing individual insert statements... I've found that there is a sqlite import command that allows this: http://stackoverflow.com/questions/1045910/how-can-i-import-load-a-sql-or-csv-file-into-sqlite ...but I'm having trouble applying those statements in my Android application. My first thought was to try something like the following...but no luck: db.execSQL("CREATE TABLE " + TABLE_NAME + "(id INTEGER PRIMARY KEY, name TEXT)"); db.execSQL(".mode csv"); db.execSQL(".import res/raw/MyFile.csv " + TABLE_NAME); Is this possible? Should I be trying a different approach to populate my database? Thanks for you answers!

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  • Removing offline/defunct files in SQL server 2008

    - by philox
    How to remove traces of files marked as OFFLINE or DEFUNCT in Microsoft SQL server 2008? I have been playing around with a setup where I create a database with 3 file-groups which are: Primary, FileGroupData and FileGroupIndex. The clustered index is using FileGroupData and a non-clustered index is set to use FileGroupIndex. To simulate a disk failure I've shut down SQL server and manually deleted the files in index file-group. To start the database I'll mark the files 'OFFLINE', but after that I can't delete the index files, which are now offline. I don't have backup of the files as they are merely indices, but that has the implication that I can't restore the files and have their status as "ONLINE". How would you recommend removing the files and the file-group as they still show up in management studio under files/file-groups. Management studio is not able to delete them. As far as I can tell this is different from the question posted in : http://stackoverflow.com/questions/462637/how-do-i-remove-offline-files-from-a-sql-server-2005-database /Philip

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  • Escape apostrophe when passing parameter in onclick event

    - by RememberME
    I'm passing the company name to an onclick event. Some company names have apostrophes in them. I added '.Replace("'", "'")' to the company_name field. This allows the onclick event to fire, but the confirm message displays as "Jane's Welding Company". <a href="#" onclick="return Actionclick('<%= Url.Action("Activate", new {id = item.company_id}) %>', '<%= Html.Encode(item.company1.company_name.Replace("'", "&#39;")) %>');" class="fg-button fg-button-icon-solo ui-state-default ui-corner-all"><span class="ui-icon ui-icon-refresh"></span></a> <script type="text/javascript"> function Actionclick(url, companyName) { if (confirm('This action will activate this company\'s primary company ('+companyName+') and all of its other subsidiaries. Continue?')) { location.href = url; }; };

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  • Display separator in Sharepoint AspMenu control

    - by Ryan Eastabrook
    All I'm trying to do is display a separator (I've tried images & stylesheets) between the primary navigation menu items in Sharepoint. Here is what I want it to look like: Home | Menu1 | Menu2 | Menu3 When I attempt to use the StaticTopSeparatorImageUrl (using a bar image) it results in the following: Home | Menu1 | Menu2 | Menu3 | This is obviously not a separator, and when I use the StaticBottomSeparatorImageUrl the opposite happens. I also tried to style the ms-topnav class to have a left border, which doesn't work because the control doesn't identify the first (or last) item in the menu... So, my next option was to use the Telerik RadMenu, after fighting to get it into Sharepoint I had difficulties getting it to display like the Sharepoint Menu using the SiteMapDataSource (display only the Home item and no children). This seems SO simple, but it is Sharepoint, so nothing is really simple. I'm wondering if there is either a way to make the default Sharepoint separator work correctly that I might have missed, or is there a GOOD Sharepoint menu replacement that actually takes styling into account?

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  • Linq To Sql and identity_insert

    - by Ronnie Overby
    I am trying to do record inserts on a table where the primary key is an Identity field. I have tried calling mycontext.ExecuteCommand("SET identity_insert myTable ON") but this doesn't do any good. I get an error saying that identity_insert is off when I submit changes. How can I turn it ON from the c# code before I submit changes? EDIT I have read that this is because ExecuteCommand's code gets executed in a different session. EDIT 2 Is there any way I can execute some DDL to remove the Identity Specification from my C# code, do the inserts, and then turn Identity Specification back on?

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  • Which programming language is manageable by an 11 year old kid?

    - by tangens
    Possible Duplicates: What is the easiest language to start with? What are some recommended programming resources for pre-teens? My son is 11 years old and he would like to learn a programming language. Of course his primary goal is to develop some (simple) games. Do you know of a programming language that is suitable for this situation? Summary of languages recommended in the answers Snake Wrangling for Kids (answer) Scratch (answer) Small Basic (answer) (answer) Logo NXT-G for Lego Mindstorms (answer) Alice (answer) BlueJ (answer) Squeak Smalltalk (answer) (answer) (answer) Blender Game Engine (answer) PyGame (answer) (answer) (answer) Inform (answer) Phrogram (answer) Dr Scheme (answer) eToys (answer) runrev (answer) Karel Programming (answer) Hackety Hack (answer) Visual Basic (answer) (answer) Learn to Program (answer) QBasic (answer) (answer) Visual Basic Express (answer) Processing (answer) C# (answer) JavaScript (answer) (answer) Ruby (answer) ToonTalk (answer) Flash and ActionScript (answer) StarLogo (answer) Java (answer) Kodu (answer) XNA (answer) (answer) unity3D (answer) BlitzBasic (answer)(answer) Lua (answer)

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  • Configuration file 'C:\my\App.Config' is being used to configure all executables

    - by Taylor Leese
    I have a Visual Studio setup project that installs an application into the task scheduler and also installs a GUI application to manage some configuration parameters in the registry. This being the case, the setup project installs two different primary outputs (.exe's) as part of the process. I am getting the following warning when I rebuild the setup project: Configuration file 'C:\my\App.Config' is being used to configure all executables Is there any way to remove this warning? The suggested MSFT solution apears to be to use a different setup project for each .exe, but I only want the users to have to run one installer. Any suggestions?

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  • build error, warning MSB3258

    - by Steed
    I have recently moved my solution from my main dev machine using vs2010 pro sp1 to a new machine. The setup is supposed to be the same except its failing to build. Its giving errors like c:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets(1360,9): warning MSB3258: The primary reference "C:\rep\hms\trunk\ikassystemv3\ikasDAL\bin\Debug\ikasDAL.dll" could not be resolved because it has an indirect dependency on the .NET Framework assembly "mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" which has a higher version "4.0.0.0" than the version "2.0.0.0" in the current target framework. However all all the libraries in question are set to use the .net 2 framework and I need it this way or else it will break stuff that uses them. However for some reason it seems to think that somehow my .net 2 system libs are somehow referencing .net 4 stuff. All the referenced libs are .net 2 You can see my build output here http://tinyurl.com/bnugru4

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  • WinForms - Localization - UI controls positions different in additional Culture

    - by binball
    Hi, I did my UI settings.Original language is English. After that I set Localizable property to True. Copied original resx file to frmMain.de-De.resx (for example). Translated all strings. Everything works. But now I would like to change positions of controls. After that changes are visible only for original/primary Culture (En). When I change Culture to de-De then UI controls are on the "old positions"(?!) Is this normal behaviour? :O I'm unable to change controls positions on my form after localization? Can someone explain me this and give some best solution. I really have to change UI design but I don't want to manual copy all translated strings again. If my description is not clear then I can post source code, just please let me know. I use VS 2008. Greetz!

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  • Using truncate table alongside Hibernate?

    - by Marcus
    Is it OK to truncate tables while at the same time using Hibernate to insert data? We parse a big XML file with many relationships into Hibernate POJO's and persist to the DB. We are now planning on purging existing data at certain points in time by truncating the tables. Is this OK? It seems to work fine. We don't use Hibernate's second level cache. One thing I did notice, which is fine, is that when inserting we generate primary keys using Hibernate's @GeneratedValue where Hibernate just uses a key value one greater than the highest value in the table - and even though we are truncating the tables, Hibernate remembers the prior value and uses prior value + 1 as opposed to starting over at 1. This is fine, just unexpected. Note that the reason we do truncate as opposed to calling delete() on the Hibernate POJO's is for speed. We have gazillions of rows of data, and truncate is just so much faster.

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  • Calling next value of a sequence in jpa

    - by Javi
    Hello, I have a class mapped as an Entity to persist it in a database. I have an id field as the primary key so every time the object is persisted the value of the id is retrieved from the sequence "myClass_pk_seq", a code like the following one. @Entity @Table(name="myObjects") public class MyClass { @Id @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="sequence") @SequenceGenerator(name="sequence", sequenceName="myClass_pk_seq", allocationSize=1) @Column(name="myClassId") private Integer id; ... } I need to get the next value of the sequence myClass_pk_seq to reserve that value (get the next value of the sequence and the current value is incremented), but without saving the object. How can I call the next value of a sequence when it's defined like this? Thanks.

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  • ADD COLUMN to sqlite db IF NOT EXISTS - flex/air sqlite?

    - by Adam
    I've got a flex/air app I've been working on, it uses a local sqlite database that is created on the initial application start. I've added some features to the application and in the process I had to add a new field to one of the database tables. My questions is how to I go about getting the application to create one new field that is located in a table that already exists? this is a the line that creates the table stmt.text = "CREATE TABLE IF NOT EXISTS tbl_status ("+"status_id INTEGER PRIMARY KEY AUTOINCREMENT,"+" status_status TEXT)"; And now I'd like to add a status_default field. thanks! Thanks - MPelletier I've add the code you provided and it does add the field, but now the next time I restart my app I get an error - 'status_default' already exists'. So how can I go about adding some sort of a IF NOT EXISTS statement to the line you provided?

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  • Supplementary Developer Laptop

    - by David Silva Smith
    I'm looking to buy a laptop with the following specs for a developer. The goal will be to have a development machine supplementing the devs desktop. During work hours the dev will be on a beefy desktop. For working while on the go: trains, client sites, code camps, it would be nice to have a machine which can run Visual Studio 2008 without needing to remote desktop into their primary machine. What do you think is the lowest cost laptop meeting this need? Here are the specs I have in mind: SSD drive 64GB-doesn't need to be huge, most data is stored on servers. Will need to fit Windows 7, IIS, SQL Server, and Visual Studio 2010. RAM-3GB processor =Pentium Core 2 duo Screen size = 14 inches. OS doesn't matter. It will be paved with Windows 7 Ultimate optical drive omitted would be a plus. weight and battery life aren't so important because the machine will be plugged in almost all the time.

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  • Convert byte array from Oracle RAW to System.Guid?

    - by Cory McCarty
    My app interacts with both Oracle and SQL Server databases using a custom data access layer written in ADO.NET using DataReaders. Right now I'm having a problem with the conversion between GUIDs (which we use for primary keys) and the Oracle RAW datatype. Inserts into oracle are fine (I just use the ToByteArray() method on System.Guid). The problem is converting back to System.Guid when I load records from the database. Currently, I'm using the byte array I get from ADO.NET to pass into the constructor for System.Guid. This appears to be working, but the Guids that appear in the database do not correspond to the Guids I'm generating in this manner. I can't change the database schema or the query (since it's reused for SQL Server). I need code to convert the byte array from Oracle into the correct Guid.

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  • Generating Entity Keys

    - by David Veeneman
    I have run into my first dissapointment with Entity Framework 4. It turns out that SQL CE, when used with EF4, does not support autogenerated primary keys. I get a System.Data.UpdateException from OnjectContext.SaveChanges() with this message: Server-generated keys and server-generated values are not supported by SQL Server Compact. So, now I have to manually generate keys for my entities. Assuming I want to use auto-incremented integer keys, what is the best way to go about generating and keeping track of the keys when using Entity Framework? Thanks for your help.

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  • Convert SQLITE SQL dump file to POSTGRESQL

    - by DevX
    I've been doing development using SQLITE database with production in POSTGRESQL. I just updated my local database with a huge amount of data and need to transfer a specific table to the production database. SQLITE outputs a table dump in the following format: BEGIN TRANSACTION; CREATE TABLE "courses_school" ("id" integer PRIMARY KEY, "department_count" integer NOT NULL DEFAULT 0, "the_id" integer UNIQUE, "school_name" varchar(150), "slug" varchar(50)); INSERT INTO "courses_school" VALUES(1,168,213,'TEST Name A',NULL); INSERT INTO "courses_school" VALUES(2,0,656,'TEST Name B',NULL); .... COMMIT; How do I convert the above into a POSTGRESQL compatible dump file that I can import into my production server?

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  • Store and retrieve images from file system instead of database

    - by Karsten
    Hi I need a place to store images. My first thought was to use the database, but many seems to recommend using the filesystem. This seems to fit my case, but how do I implement it? The filenames need to be unique, how to do that. Should I use a guid? How to retrieve the files, should I go directly to the database using the filename, make a aspx page and passing either filename or primary key as a querystring and then read the file. What about client side caching, is that enabled when using a page like image.aspx?id=123 ? How do I delete the files, when the associated record is deleted? I guess there are many other things that I still haven't thought about. Links, samples and guidelines are very welcome!

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  • Check ReturnUrl is valid before redirecting

    - by Josh
    I'm using ASP.NET Membership and Form Authentication and before redirecting to the returnURL I wanted to validate it. For those unfamiliar with the workflow, basically if you request a page that requires that you are authenticated, you are redirected to a login page. In the URL string you'll see a parameter called returnURL, e.g. http://example.com/login.aspx?ReturnUrl=%2fprotected%2fdefault.aspx Whether you use this in a redirect such as Response.Redirect(returnURL) or indirectly through the FormsAuthentication.RedirectFromLoginPage method, it passes without validating returnURL. FormsAuthentication.RedirectFromLoginPage does have a security check that it is isn't leaving the domain, but that still doesn't stop someone from putting enough random characters to cause an error. I tried using System.IO.File.Exists(Server.MapPath(returnURL)) but given enough illegal characters it cause Server.MapPath to error. Note: URLEncoding doesn't work because we are not cleaning a parameter, but the primary URL. Any other suggestions for validating or cleaning the returnURL value?

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  • Is PHP serialize function compatible UTF-8 ?

    - by Matthieu
    I have a site I want to migrate from ISO to UTF-8. I have a record in database indexed by the following primary key : s:22:"Informations générales"; The problem is, now (with UTF-8), when I serialize the string, I get : s:24:"Informations générales"; (notice the size of the string is now the number of bytes, not string length) So this is not compatible with non-utf8 previous records ! Did I do something wrong ? How could I fix this ? Thanks

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  • How to select the top n from a union of two queries where the resulting order needs to be ranked by individual query?

    - by Jedidja
    Let's say I have a table with usernames: Id | Name ----------- 1 | Bobby 20 | Bob 90 | Bob 100 | Joe-Bob 630 | Bobberino 820 | Bob Junior I want to return a list of n matches on name for 'Bob' where the resulting set first contains exact matches followed by similar matches. I thought something like this might work SELECT TOP 4 a.* FROM ( SELECT * from Usernames WHERE Name = 'Bob' UNION SELECT * from Usernames WHERE Name LIKE '%Bob%' ) AS a but there are two problems: It's an inefficient query since the sub-select could return many rows (looking at the execution plan shows a join happening before top) (Almost) more importantly, the exact match(es) will not appear first in the results since the resulting set appears to be ordered by primary key. I am looking for a query that will return (for TOP 4) Id | Name --------- 20 | Bob 90 | Bob (and then 2 results from the LIKE query, e.g. 1 Bobby and 100 Joe-Bob) Is this possible in a single query?

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  • Modifying a column with the 'Identity' pattern is not supported in WCF RIA Services

    - by Banford
    I've been following the walkthrough for creating your first WCF RIA Services Application from Microsoft and have encountered a problem when trying to edit and update data using the SubmitChanges() method of the Data Context. The table being updated has an Identity Specification set in SQL Server 2008 on the 'CourseID' column. However the PRIMARY key is a composite of two other fields. When using SubmitChanges() the application locks up in the browser an presents an unhandled exception. By handling this exception I managed to get the message: Modifying a column with the 'Identity' pattern is not supported. This is referring to the 'CourseID' column. Turning identity specification off solves the problem, but I need the auto-incrementing ID. In what way isn't this supported. Or where am I going wrong?

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