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  • ASP.NET MVC2 - using LINQ-generated class

    - by ile
    There are few things not clear to me about ASP.NET MV2. In database I have table Contacts with several fields, and there is an additional field XmlFields of which type is xml. In that field are stored additional description fields. There are 4 classes: Contact class which corresponds to Contact table and is defined by default when creating LINQ classes ContactListView class which inherits Contact class and has some additional properties ContactXmlView class that contains fields from XmlFields field ContactDetailsView class which merges ContactListView and ContactXmlView into one class and this one is used to display data in view pages ContactListView class has re-defined some properties from Contact class (so that I can add [Required] filter used for validation) - but I get warning message: 'ObjectTest.Models.Contacts.ContactListView.FirstName' hides inherited member 'SA.Model.Contact.FirstName'. Use the new keyword if hiding was intended. ContactDetailsView class is also used in a form when creating new contact and adding it to database. I am not sure if this is correct way, and the warning message confuses me a bit. Any advise about this? Thanks, Ile

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  • Perl: catch error without die

    - by Pmarcoen
    I'm playing around with error handling and got a little problem. I connect with a database using the DBI module. I do my own error handling by using a subroutine that I call upon an error. I can catch my own dies and handle them just fine but when my database connection fails, the DBI module apparently prints out it's own die : DBI connect(...) failed: ORA-12154: TNS:could not resolve the connect identifier specified (DBD ERROR: OCIServerAttach) at ... How would I go about catching this ? I tried using $SIG{DIE} like so : local $SIG{__DIE__} = sub { my $e = shift; print "Error: " .$e; }; This is on the bottom of my main file, in this file I also call the connect subroutine that is available in a module of my own. I also tried putting this piece of code on the bottom of my module but it still prints the error without the "Error:" in front of it.

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  • AES Encryption. From Python (pyCrypto) to .NET

    - by Why
    I am currently trying to port a legacy Python app over to .NET which contains AES encrpytion using from what I can tell pyCrpyto. I have very limited Python and Crypto experience. The code uses the snippet from the following page. http://www.djangosnippets.org/snippets/1095/ So far I believe I have managed to work out that it that it calls Crypto.Cipher with AES and the first 32 character of our secret key as the password, but no mode or IV. It also puts a prefix on the encrpyed text when it is added to database. What I can't work out is how I can decrypt the existing ecrypted database records in .NET. I have been looking at RijndaelManaged but it requires an IV and can't see any reference to one in python. Can anyone point me in the dirrection to what method could be used in .NET to get the desired result.

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  • C# and MySQL .NET Connector - Any way of preventing SQL Injection attacks in a generic class?

    - by John M
    My idea is to create some generic classes for Insert/Update/Select via a C# (3.5) Winforms app talking with a MySQL database via MySQL .NET Connector 6.2.2. For example: public void Insert(string strSQL) { if (this.OpenConnection() == true) { MySqlCommand cmd = new MySqlCommand(strSQL, connection); cmd.ExecuteNonQuery(); this.CloseConnection(); } } Then from anywhere in the program I can run a query with/without user input by just passing a SQL query string. Reading around on SO is starting to give me the indication that this may lead to SQL injection attacks (for any user-input values). Is there anyway of scrubbing the inputted strSQL or do I need to go and create individual parameterized queries in every method that needs to do a database function?

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  • why create "EventType clr20r3, P1 w3wp.exe" but don't have detail description of this unhandled exce

    - by Weixiao.Fan
    On the production server, I can see event from system Event Viewer when an asp.net app crash: *EventType clr20r3, P1 w3wp.exe, P2 6.0.3790.3959, P3 45d691cc, P4 app_web_default.aspx.cdcab7d2, P5 0.0.0.0, P6 4b2e4bf0, P7 4, P8 4, P9 system.dividebyzeroexception, P10 NIL.* it belongs to ".NET Runtime 2.0 Error Reporting" category. but I can't find a event which belongs to "ASP.NET 2.0.50727.0" which can give me this exception a detail view: *An unhandled exception occurred and the process was terminated. Application ID: /LM/W3SVC/505951206/Root Process ID: 1112 Exception: System.DivideByZeroException Message: Attempted to divide by zero. StackTrace: at _Default.Foo(Object state) at System.Threading.ExecutionContext.runTryCode(Object userData) at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack) at System.Threading.ThreadPoolWaitCallback.PerformWaitCallback(Object state) For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp I can find these two event on my dev machine, because of Visual Studio installing? If so, how can I disable this so I can emulate production environment? Great thanks and best regards, Fan

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  • Statistics based marketing campaign measurement tools

    - by AFHood
    Currently using SAS as measurement engine and Business Objects as display layer. Looking to develop a new, faster, slicker solution. Has anyone developed or purchased a campaign measurement reporting system? This solution should measure everything from email stats, web stats, customer activity, lift, ROI, etc. Ok.. I'm researching and finding nada... We are working with a team from India and they want to re-write everything from scratch.. Any solutions out there at all?

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  • Dealing with XML in ASP.NET MVC

    - by Matt W
    I have a block of XML in a database which is easy enough to pull out using ASP.NET MVC, however I would like to access and modify the XML in an way more consistent with class instances. Is there a way to get the MVC (or any other model) to generate a data access (or perhaps Entity) class set from the DB-stored XML? If the above is rather obtuse, the question could be summarised as; What method would you use to best access and modify XML stored in a database from an ASP.NET MVC application? Thanks, Matt.

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  • One repository per table or one per functional section?

    - by Ian Roke
    I am using ASP.NET MVC 2 and C# with Entity Framework 4.0 to code against a normalised SQL Server database. A part of my database structure contains a table of entries with foreign keys relating to sub-tables containing drivers, cars, engines, chassis etc. I am following the Nerd Dinner tutorial which sets up a repository for dinners which is fair enough. Do I do one for drivers, one for engines, one for cars and so on or do I do one big one for entries? Which is the best practise for this type of work? I am still new to this method of coding.

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  • Tail recursion in Erlang

    - by dagda1
    Hi, I am really struggling to understand tail recursion in Erlang. I have the following eunit test: db_write_many_test() -> Db = db:new(), Db1 = db:write(francesco, london, Db), Db2 = db:write(lelle, stockholm, Db1), ?assertEqual([{lelle, stockholm},{francesco, london}], Db2). And here is my implementation: -module(db) . -include_lib("eunit/include/eunit.hrl"). -export([new/0,write/3]). new() -> []. write(Key, Value, Database) -> Record = {Key, Value}, [Record|append(Database)]. append([H|T]) -> [H|append(T)]; append([]) -> []. Is my implementation tail recursive and if not, how can I make it so? Thanks in advance

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  • Javamelody with Tomcat and MySql

    - by Shane
    I have setup a web application in Tomcat with Javamelody and MySql. I am able to see the JDBC connection details under system info so I know that Javamelody is able to connect to the database. I have executed select/update statements from my application but nothing is ever shown on the monitoring page under statistics sql. I have executed "show full processlist" using the same user as my database connection and it works fine. I can't work out what I am doing wrong. Any ideas?

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  • Why does installing NVidia 9600GT graphics card, take 1GB of RAM away from Windows?

    - by Nick G
    Hi, I've changed graphics cards in my PC and now Windows 7 (32bit) is reporting that I have a whole gigabyte less physical RAM in my PC. Why is this? Firstly, the machine has 4GB of physical RAM. The old card was an ATI 2600XT with 256MB and the new card is an NVidia 9600GT with 512MB. With the ATI card windows sees 3326MB. With the NVidia card, windows sees 2558MB. I realise that due to address space restrictions I will not see all 4GB with 32bit windows, but why is there such a massive loss of RAM when simply changing cards (bearing in mind BOTH cards have their own RAM and borrow no main memory like some built on chipsets do). Would using 64 bit windows solve this? Thanks Nick.

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  • Mysql out of disk space

    - by Paddy
    I have just finished developing a rails app which has a mysql db as a backend. The app is meant for high traffic and will store lots of information. I am planning to set up my own web server and host the site from it. If in future my disk space runs out i would want to expand by adding more space. But say if my mysql database is housed in my /disk0s1 and by adding a new drive i have more partitions (and hence more disk space), how then would i extend my database to store information on those partitions too, and at the same time prevent any information from being written on the original partition. Should i go for multiple databases? if so how? If i went for a hosting solution i wouldn't be bothering about this as i would just have to worry about making payments for the extra space :) I always wondered how space is added on-the-go by these webhosts. Is there any specific mysql configuration that i have to make?

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  • Reading correctly alphanumeric fields into R

    - by gd047
    A tab-delimited text file, which is actually an export (using bcp) of a database table, is of that form: 102 1 01 e113c 3224.96 12 102 1 01 e185 101127.25 12 102 2 01 e185 176417.90 12 102A 3 01 e185 26261.03 12 I tried to import it in R with a command like data <- read.delim("C:\\test.txt", header = FALSE, sep = "\t") The problem is that the 3rd column which is actually a varchar field (alphanumeric) is mistakenly read as integer (as there are no letters in the entire column) and the leading zeros disappeared. The same thing happened when I imported the data directly from the database, using odbcConnect. Again that column was read as integer. str(data) $ code: int 1 1 1 1 1 1 6 1 1 8 ... How can I import such a dataset in R correctly, so as to be able to safely populate that db table again, after doing some data manipulations?

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  • Applying Domain Model on top of Linq2Sql entities

    - by Thomas
    I am trying to practice the model first approach and I am putting together a domain model. My requirement is pretty simple: UserSession can have multiple ShoppingCartItems. I should start off by saying that I am going to apply the domain model interfaces to Linq2Sql generated entities (using partial classes). My requirement translates into three database tables (UserSession, Product, ShoppingCartItem where ProductId and UserSessionId are foreign keys in the ShoppingCartItem table). Linq2Sql generates these entities for me. I know I shouldn't even be dealing with the database at this point but I think it is important to mention. The aggregate root is UserSession as a ShoppingCartItem can not exist without a UserSession but I am unclear on the rest. What about Product? It is defiently an entity but should it be associated to ShoppingCartItem? Here are a few suggestion (they might all be incorrect implementations): public interface IUserSession { public Guid Id { get; set; } public IList<IShoppingCartItem> ShoppingCartItems{ get; set; } } public interface IShoppingCartItem { public Guid UserSessionId { get; set; } public int ProductId { get; set; } } Another one would be: public interface IUserSession { public Guid Id { get; set; } public IList<IShoppingCartItem> ShoppingCartItems{ get; set; } } public interface IShoppingCartItem { public Guid UserSessionId { get; set; } public IProduct Product { get; set; } } A third one is: public interface IUserSession { public Guid Id { get; set; } public IList<IShoppingCartItemColletion> ShoppingCartItems{ get; set; } } public interface IShoppingCartItemColletion { public IUserSession UserSession { get; set; } public IProduct Product { get; set; } } public interface IProduct { public int ProductId { get; set; } } I have a feeling my mind is too tightly coupled with database models and tables which is making this hard to grasp. Anyone care to decouple?

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  • Delphi 7: how to execute shell command and check the result?

    - by mawg
    I'm using Delphi 7 and can't predict the target version of Windows. I need to create a database (probably MySql, but might be something else) and define some table structures. I do not need to populate any data. Unfortunately, all of the ADO components seem to expect that a database already exists and they will then allow you to manipulate it. So, since it's only a few simple commands, I thought that I might as well use ShellExectute(). Agree? Disagree? Can anyone give me a sample code which will attempt to run "MySql --version" and let me check the result? After that I should be able to figure it out for myself. Thanks.

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  • how find out the form is submit in JSP?

    - by user261002
    I am trying to create a an online exam with JSP. I want to get the questions one by one and show them on the screen, and create a "Next" button then user is able to to see the next question, but the problem is that I dont know how to find out that the user has clicked on the "Next" button, I know how to do it in PHP : if($_SERVER['REQUEST_METHOD']=='GET') if($_GET['action']=='Next') but I dont know how to do it in JSP. Please help me this is piece of my code: String result = ""; if (database.DatabaseManager.getInstance().connectionOK()) { database.SQLSelectStatement sqlselect = new database.SQLSelectStatement("question", "question", "0"); ResultSet _userExist = sqlselect.executeWithNoCondition(); ResultSetMetaData rsm = _userExist.getMetaData(); result+="<form method='post'>"; result += "<table border=2>"; for (int i = 0; i < rsm.getColumnCount(); i++) { result += "<th>" + rsm.getColumnName(i + 1) + "</th>"; } if (_userExist.next()) { result += "<tr>"; result += "<td>" + _userExist.getInt(1) + "</td>"; result += "<td>" + _userExist.getString(2) + "</td>"; result += "</tr>"; result += "<tr>"; result += "<tr> <td colspan='2'>asdas</td></tr>"; result += "</tr>"; } result += "</table>"; result+="<input type='submit' value='next' name='next'/></form>"; }

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  • Validation of user input or ?????????

    - by zaf
    We're letting users search a database from a single text input and I'm having difficulties in filtering some user supplied strings. For example, if the user submits: ????????? lcd SONY (Note the ?'s) I need to cancel the search. I include the base64 encoded version of the above string wrapped up so that its easy run: print(base64_decode("1MfLxc/RwdPHIGxjZCBTT05Z")); I've ignored such inputs before but now (am not sure why) just realised the mysql database query is taking nearly forever to execute so this is now on high priority. Another example to highlight that we are using utf-8 and mb_detect_encoding is not helping much: print(base64_decode("zqDOm8+Fzr3PhM63z4HOuc6/IM+Bzr/Phc+HzyU=")); ????t???? ?????% So: how can I detect/filter these inputs? how is this input being generated?

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  • SQL Server: Granting db_datawriter on all databases

    - by Michael J Swart
    I want to manage permissions and access to a SQL Server database server on a development machine. I've created a local windows group (called DBReaderGroup) and assigned various people to it. The group was created as a SQL Server login successfully: create login [MYMACHINE\DBReaderGroup] from windows My goal is to grant this group read/write access to all databases (which are constantly being added and dropped). Is it possible to configure the right settings so that SQL Server manages this? My biggest challenge is that each time a db is created, I have to update the "User Mapping" settings for this group on the new database. Am I missing something simple?

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  • how to build a index table(python dict like) in python with sqlite3

    - by Registered User KC
    Suppose I have one string list may have duplicated items: A B C A A C D E F F I want to make a list can assign an unique index for each item, looks like: 1 A 2 B 3 C 4 D 5 E 6 F now I created sqlite3 database with below SQL statement: CREATE TABLE aa ( myid INTEGER PRIMARY KEY AUTOINCREMENT, name STRING, UNIQUE (myid) ON CONFLICT FAIL, UNIQUE (name) ON CONFLICT FAIL); The plan is insert each row into the database in python. My question is how to handle the error when conflict do happened when insert in python module sqlite3? For example: the program will printing a warning message which item is conflicted and continue next insert action when inserting in python? Thanks

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  • Mark row as deleted in dataTable on

    - by dav.evans
    I have a datatable bound to a winforms dataGridView via a BindingSourceControl. I want to be able handle the UserDeletingRow event from the dataGridView and mark the row in my dataTable as deleted. I need to then be able to retrieve the rows marked as deleted from the datatable so that I can delete them from my database when a Save button is clicked. Please not I dont want to delete from the database on each firing of UserDeletingRow, only mark that row as deleted in my dataset. Can anyone point out how to do this?

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  • Relying on nhibernate's second level cache vs pushing objects into asp.net session

    - by AhmetC
    I have some big entities which are frequently accessed in the same session. For example, in my application there is a reporting page which consist of dynamically generated chart images. For each chart image on this page, the client makes requests to corresponding controller and the controller generates images using some entities. I can either use asp.net's session dictionary for "caching" those entities or rely on nhibernate's second level cache support with using cached queries for example. What is your opinion? By the way I will use shared hosting, is nhibernate's second level cache hosting friendly? Thanks.

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  • news website with php and links

    - by mohammad reza
    newly i have created a news website, everything is based on php and mysql, NOW with more attention on other news website i see something wrong with my site in all of them when you are click on a news, that news open like a new page and in link bar you can see the link of that news like this: http://www.wired.com/wiredscience/2012/09/space-shuttle-endeavour-lands-in-los-angeles/ BUT in my website i have a page that named viewer.php and this page connected to database, when you are click on a news in my site you see something like this in link bar: www.example.com/viewer.php?ne_id=14 ne_id in my news table set specific number for a news like 14 and all of news (title, content and so on)saved on database how that site work? how to create like that site? i don't have any idea? if you know somthing (EVERYTHING) i need it please , i have really confused really sorry for my terrible english and thanks for your time

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  • Enum in Hibernate, persisting as an enum

    - by niklassaers
    In my MySQL database, there's the column "gender enum('male','female')" I've created my enum "com.mydomain.myapp.enums.Gender", and in my Person entity I'm defined "Gender gender". Now I'd want to keep the enum type in my MySQL database, but when I launch my application I get: Wrong column type in MyApp.Person for column Gender. Found: enum, expected: integer Why is this? This would be the equivalent as if I'd annotated my "Gender gender" with "@Enumerated(EnumType.ORDINAL)", which I haven't. EnumType seems only to be able to be either ORDINAL or STRING, so how do I specify that it should treat the field as an enum, not as an int? (not that there's much difference, but enough for it to get upset about it.)

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