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  • Achieve Rails-style migrations in MS Access VBA application

    - by avguchenko
    This is a simple way to do Rails-style migrations in a VBA application. Just add additional migrations like migration(name, sql_string, database) to run_migratons and call run_migrations somewhere in the beginning of your execution. Function migrate(signature As String, sql As String, dbs As DAO.database) Dim rs As DAO.Recordset Set rs = dbs.OpenRecordset("select * from versions where migration = '" & signature & "'") If rs.EOF Then dbs.Execute (sql) rs.AddNew rs("migration") = signature rs.Update End If End Function Function setup_versions(dbs As DAO.database) Dim t As DAO.TableDef On Error Resume Next Set t = dbs.TableDefs("versions") If Err.Number <> 0 Then dbs.Execute ("CREATE TABLE versions (migration text)") End If Err.Clear End Function Function run_migrations(dbs As DAO.database) setup_versions(dbs) migrate("20100315142400_create_table", "CREATE TABLE table_name (field1 type, field 2 type)", dbs) 'add migrations here' End Function

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  • MySQL Connection Error in PHP

    - by user309381
    I have set the password for root and grant all privileges for root. Why does it say it is denied? ****mysql_query() [function.mysql-query]: Access denied for user 'SYSTEM'@'localhost' (using password: NO) in C:\wamp\www\photo_gallery\includes\database.php on line 56 Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in C:\wamp\www\photo_gallery\includes\database.php on line 56 The Query has problemAccess denied for user 'SYSTEM'@'localhost' (using password: NO) Code as follows: <?php include("DB_Info.php"); class MySQLDatabase { public $connection; function _construct() { $this->open_connection(); } public function open_connection() { /* $DB_SERVER = "localhost"; $DB_USER = "root"; $DB_PASS = ""; $DB_NAME = "photo_gallery";*/ $this->connection = mysql_connect($DBSERVER,$DBUSER,$DBPASS); if(!$this->connection) { die("Database Connection Failed" . mysql_error()); } else { $db_select = mysql_select_db($DBNAME,$this->connection); if(!$db_select) { die("Database Selection Failed" . mysql_error()); } } } function mysql_prep($value) { if (get_magic_quotes_gpc()) { $value = stripslashes($value); } // Quote if not a number if (!is_numeric($value)) { $value = "'" . mysql_real_escape_string($value) . "'"; } return $value; } public function close_connection() { if(isset($this->connection)) { mysql_close($this->connection); unset($this->connection); } } public function query($sql) { //$sql = "SELECT*FROM users where id = 1"; $result = mysql_query($sql); $this->confirm_query($result); //$found_user = mysql_fetch_assoc($result); //echo $found_user; return $found_user; } private function confirm_query($result) { if(!$result) { die("The Query has problem" . mysql_error()); } } } $database = new MySQLDatabase(); ?>

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  • sql exception when transferring project from usb to c:\

    - by jello
    I'm working on a C# windows program with Visual Studio 2008. Usually, I work from school, directly on my usb drive. But when I copy the folder on my hard drive at home, an sql exception is unhandled whenever I try to write to the database. it is unhandled at the conn.Open(); line. here's the exception unhandled Database 'L:\system\project\the_project\the_project\bin\Debug\PatientMonitoringDatabase.mdf' already exists. Choose a different database name. Cannot attach the file 'C:\Documents and Settings\Administrator\My Documents\system\project\the_project\the_project\bin\Debug\PatientMonitoringDatabase.mdf' as database 'PatientMonitoringDatabase'. it's weird, because my connection string says |DataDirectory|, so it should work on any drive... here's my connection string: string connStr = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\PatientMonitoringDatabase.mdf; " + "Initial Catalog=PatientMonitoringDatabase; " + "Integrated Security=True"; what's going on here?

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  • Creating Membership Tables, SPROCs, Views in Attached DB

    - by azamsharp
    I have AdventureWorks database mdf file in my VS 2010 project. Is there anyway I can create Membership tables inside my AdventureWorks database. I know I can detach the database attach in SQL SERVER 2008. Create the tables and then detach. But I don't have SQL SERVER 2008 and I want to see if this can be done using command line tool. I tried this but no use: aspnet_regsql.exe -d AdventureWorks.mdf -A mr -E -S .\SQLEXPRESS Update: If I right click and see the properties of the AdventureWorks.mdf database then it shows the name as "C4BE6C8DA139A060D14925377A7E63D0_64A_10\ADVENTUREWORKSWEBFORMS\ADVENTUREWORKSWEBFORMS\ADVENTUREWORKS\APP_DATA\ADVENTUREWORKS.MDF" This is interesting!

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  • Change My.Settings ConnectionString in runtime?

    - by Sultanen
    I have a ClickOnce deployment where i have a INI-settings file on the network file with "global" settings that is supposed to affect the program on all client computers. The problem i have is that i whant to have the Database connectionString stored in this INI file and have it read and stored in the My.Settings ConnectionString at program startup. How do i do this? The ConnectionString setting is Application scoped and therefore Read-Only, if i try to set it by My.Settings("ConnectionString") = "Source=server;Initial Catalog=database;Integrated Security=True" I get a runtime error: An error occurred creating the form. See Exception.InnerException for details. The error is: The type initializer for 'DB_lib.DB_LINQ' threw an exception. [EDIT] I got rid of the error by using the My.Settings("ConnectionString") = "Source=server;Initial Catalog=database;Integrated Security=True" in another place then the the eventtriggerd settingsLoaded method i created.. The problem is that even though the connectionstring semes to be the right, the program still connects to the "default" database that is typed in to the app.config file??

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  • Search for multiple values in an xml column

    - by Yuriy Gettya
    Environment: SQL Server 2012. Primary and secondary (value) index is built on xml column. Say I have a table Message with xml column WordIndex. I also have a table Word which has WordId and WordText. Xml for Message.WordIndex has the following schema: <xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.example.com"> <xs:element name="wi"> <xs:complexType> <xs:sequence> <xs:element maxOccurs="unbounded" name="w"> <xs:complexType> <xs:sequence> <xs:element maxOccurs="unbounded" name="p" type="xs:unsignedByte" /> </xs:sequence> <xs:attribute name="wid" type="xs:unsignedByte" use="required" /> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> </xs:schema> and some data to go with it: <wi xmlns="http://www.example.com"> <w wid="1"> <p>28</p> <p>72</p> <p>125</p> </w> <w wid="4"> <p>89</p> </w> <w wid="5"> <p>11</p> </w> </wi> I need to search for multiple values in my xml column WordIndex either using OR or AND. What I'm doing is fairly rudimentary, since I'm a n00b in XQuery (taken from debug output, hence real values): with xmlnamespaces(default 'http://www.example.com') select m.Subject, m.MessageId, m.WordIndex.query(' let $dummy := 0 return <word_list> { for $w in /wi/w where $w/@wid=64 return <word wid="64" pos="{data($w/p)}"/> } { for $w in /wi/w where $w/@wid=70 return <word wid="70" pos="{data($w/p)}"/> } { for $w in /wi/w where $w/@wid=63 return <word wid="63" pos="{data($w/p)}"/> } </word_list> ') as WordPosition from Message as m -- more joins go here ... where -- more conditions go here ... and m.WordIndex.exist('/wi/w[@wid=64]') = 1 and m.WordIndex.exist('/wi/w[@wid=70]') = 1 and m.WordIndex.exist('/wi/w[@wid=63]') = 1 How can this be optimized?

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  • postgresql table for storing automation test results

    - by Martin
    I am building an automation test suite which is running on multiple machines, all reporting their status to a postgresql database. We will run a number of automated tests for which we will store the following information: test ID (a GUID) test name test description status (running, done, waiting to be run) progress (%) start time of test end time of test test result latest screenshot of the running test (updated every 30 seconds) The number of tests isn't huge (say a few thousands) and each machine (say, 50 of them) have a service which checks the database and figures out if it's time to start a new automated test on that machine. How should I organize my SQL table to store all the information? Is a single table with a column per attribute the way to go? If in the future I need to add attributes but want to keep compatibility with old database format (ie I may not want to delete and create a new table with more columns), how should I proceed? Should the new attributes just be in a different table? I'm also thinking of replicating the database. In case of failure, I don't mind if the latest screenshots aren't backed up on the slave database. Should I just store the screenshots in its own table to simplify the replication? Thanks!

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  • Why is XML Deserilzation not throwing exceptions when it should.

    - by chobo2
    Hi Here is some dummy xml and dummy xml schema I made. schema <?xml version="1.0" encoding="utf-8"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.domain.com" xmlns="http://www.domain.com" elementFormDefault="qualified"> <xs:element name="vehicles"> <xs:complexType> <xs:sequence> <xs:element name="owner" minOccurs="1" maxOccurs="1"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:minLength value="2" /> <xs:maxLength value="8" /> </xs:restriction> </xs:simpleType> </xs:element> <xs:element name="Car" minOccurs="1" maxOccurs="1"> <xs:complexType> <xs:sequence> <xs:element name="Information" type="CarInfo" minOccurs="0" maxOccurs="unbounded" /> </xs:sequence> </xs:complexType> </xs:element> <xs:element name="Truck"> <xs:complexType> <xs:sequence> <xs:element name="Information" type="CarInfo" minOccurs="0" maxOccurs="unbounded"/> </xs:sequence> </xs:complexType> </xs:element> <xs:element name="SUV"> <xs:complexType> <xs:sequence> <xs:element name="Information" type="CarInfo" minOccurs="0" maxOccurs="unbounded" /> </xs:sequence> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> <xs:complexType name="CarInfo"> <xs:sequence> <xs:element name="CarName"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:minLength value="1"/> <xs:maxLength value="50"/> </xs:restriction> </xs:simpleType> </xs:element> <xs:element name="CarPassword"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:minLength value="6"/> <xs:maxLength value="50"/> </xs:restriction> </xs:simpleType> </xs:element> <xs:element name="CarEmail"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:pattern value="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"/> </xs:restriction> </xs:simpleType> </xs:element> </xs:sequence> </xs:complexType> </xs:schema> xml sample <?xml version="1.0" encoding="utf-8" ?> <vehicles> <owner>Car</owner> <Car> <Information> <CarName>Bob</CarName> <CarPassword>123456</CarPassword> <CarEmail>[email protected]</CarEmail> </Information> <Information> <CarName>Bob2</CarName> <CarPassword>123456</CarPassword> <CarEmail>[email protected]</CarEmail> </Information> </Car> <Truck> <Information> <CarName>Jim</CarName> <CarPassword>123456</CarPassword> <CarEmail>[email protected]</CarEmail> </Information> <Information> <CarName>Jim2</CarName> <CarPassword>123456</CarPassword> <CarEmail>[email protected]</CarEmail> </Information> </Truck> <SUV> <Information> <CarName>Jane</CarName> <CarPassword>123456</CarPassword> <CarEmail>[email protected]</CarEmail> </Information> <Information> <CarName>Jane</CarName> <CarPassword>123456</CarPassword> <CarEmail>[email protected]</CarEmail> </Information> </SUV> </vehicles> Serialization Class using System; using System.Collections.Generic; using System.Xml; using System.Xml.Serialization; [XmlRoot("vehicles")] public class MyClass { public MyClass() { Cars = new List<Information>(); Trucks = new List<Information>(); SUVs = new List<Information>(); } [XmlElement(ElementName = "owner")] public string Owner { get; set; } [XmlElement("Car")] public List<Information> Cars { get; set; } [XmlElement("Truck")] public List<Information> Trucks { get; set; } [XmlElement("SUV")] public List<Information> SUVs { get; set; } } public class CarInfo { public CarInfo() { Info = new List<Information>(); } [XmlElement("Information")] public List<Information> Info { get; set; } } public class Information { [XmlElement(ElementName = "CarName")] public string CarName { get; set; } [XmlElement("CarPassword")] public string CarPassword { get; set; } [XmlElement("CarEmail")] public string CarEmail { get; set; } } Now I think this should all validate. If not assume it is write as my real file does work and this is what this dummy one is based off. Now my problem is this. I want to enforce as much as I can from my schema. Such as the "owner" tag must be the first element and should show up one time and only one time ( minOccurs="1" maxOccurs="1"). Right now I can remove the owner element from my dummy xml file and deseriliaze it and it will go on it's happy way and convert it to object and will just put that property as null. I don't want that I want it to throw an exception or something saying this does match what was expected. I don't want to have to validate things like that once deserialized. Same goes for the <car></car> tag I want that to appear always even if there is no information yet I can remove that too and it will be happy with that. So what tags do I have to add to make my serialization class know that these things are required and if they are not found throw an exception.

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  • ado.net managing connections

    - by madlan
    Hi, I'm populating a listview with a list of databases on a selected SQL instance, then retrieving a value from each database (It's internal product version, column doesn't always exist) I'm calling the below function to populate the second column of the listview: item.SubItems.Add(DBVersionCheck(serverName, database.Name)) Function DBVersionCheck(ByVal SelectedInstance As String, ByVal SelectedDatabase As String) Dim m_Connection As New SqlConnection("Server=" + SelectedInstance + ";User Id=sa;Password=password;Database=" + SelectedDatabase) Dim db_command As New SqlCommand("select Setting from SystemSettings where [Setting] = 'version'", m_Connection) Try m_Connection.Open() Return db_command.ExecuteScalar().trim m_Connection.Dispose() Catch ex As Exception 'MessageBox.Show(ex.Message) Return "NA" Finally m_Connection.Dispose() End Try End Function This works fine except it's creating a connection to each database and leaving it open. My understanding is the close()\dispose() releases only the connection from the pool in ado rather than the actual connection to sql. How would I close the actual connections after I've retrieved the value? Leaving these open will create hundreds of connections to databases that will probably not be used for that session.

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  • i have problem with include file

    - by user309381
    //this is intializer.php defined('DS')? null :define('DS',DIRECTORY_SEPARATOR); defined('SITE_ROOT')? null : define('SITE_ROOT',DS.'C:',DS.'wamp',DS.'www',DS.'photo_gallery'); defined('LIB_PATH')?null:define('LIB_PATH',SITE_ROOT.DS.'includes'); require_once(LIB_PATH.DS.'datainfo.php'); require_once(LIB_PATH.DS.'function.php'); require_once(LIB_PATH.DS.'session.php'); require_once(LIB_PATH.DS.'database.php'); require_once(LIB_PATH.DS.'user.php'); //this is other file where i call php file // ERROR Use of undefined constant LIB_PATH - assumed 'LIB_PATH' in //C:\wamp\www\photo_gallery\includes\database.php on //Notice: Use of undefined constant DS - assumed 'DS' in //C:\wamp\www\photo_gallery\includes\database.php on include(LIB_PATH.DS."database.php") ?

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  • Sharing ASP.NET State databases between multiple apps

    - by MikeWyatt
    Is it better for a collection of ASP.NET web apps to share the same session database, or should each one have its own? If there is no significant difference, having a single database would be preferable due to easier maintenance. Background My team has an assortment of ASP.NET web apps, all written in either Monorail 1.1 or ASP.NET MVC 1.0. Each app currently uses a dedicated session state database. I'm working on adding a new site to that list, and am debating whether I should create another new session database, or just share an existing one with another app.

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  • How to get hibernate3-maven-plugin hbm2ddl to find JDBC driver?

    - by HDave
    I have a Java project I am building with Maven. I am now trying to get the hibernate3-maven-plugin to run the hbm2ddl tool to generate a schema.sql file I can use to create the database schema from my annotated domain classes. This is a JPA application that uses Hibernate as the provider. In my persistence.xml file I call out the mysql driver: <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/> <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/> When I run Maven, I see it processing all my classes, but when it goes to output the schema, I get the following error: ERROR org.hibernate.connection.DriverManagerConnectionProvider - JDBC Driver class not found: com.mysql.jdbc.Driver java.lang.ClassNotFoundException: com.mysql.jdbc.Driver I have the MySQL driver as a dependency of this module. However it seems like the hbm2ddl tool cannot find it. I would have guessed that the Maven plugin would have known to search the local Maven file repository for this driver. What gives? The relevant part of my pom.xml is this: <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>hibernate3-maven-plugin</artifactId> <executions> <execution> <phase>process-classes</phase> <goals> <goal>hbm2ddl</goal> </goals> </execution> </executions> <configuration> <components> <component> <name>hbm2ddl</name> <implementation>jpaconfiguration</implementation> </component> </components> <componentProperties> <persistenceunit>my-unit</persistenceunit> </componentProperties> </configuration> </plugin>

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  • By passing active x object while sending request to url?

    - by Burak Dede
    Hi i am trying to login site with request, using username and password , i can succesfully login the user than i want to parse some html and send it to database ,what it return is activex object that i can not do anything(by the way i am using java to do that) ,in order to bypasss the active x object what is your solution? 1-First come to my mind i can write c# application that using internex explorer dll than login user, it parse html and send it to database than i can use data in database

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  • Are these tables too big for SQL Server or Oracle

    - by Jeffrey Cameron
    Hey all, I'm not much of a database guru so I would like some advice. Background We have 4 tables that are currently stored in Sybase IQ. We don't currently have any choice over this, we're basically stuck with what someone else decided for us. Sybase IQ is a column-oriented database that is perfect for a data warehouse. Unfortunately, my project needs to do a lot of transactional updating (we're more of an operational database) so I'm looking for more mainstream alternatives. Question Given these tables' dimensions, would anyone consider SQL Server or Oracle to be a viable alternative? Table 1 : 172 columns * 32 million rows Table 2 : 453 columns * 7 million rows Table 3 : 112 columns * 13 million rows Table 4 : 147 columns * 2.5 million rows Given the size of data what are the things I should be concerned about in terms of database choice, server configuration, memory, platform, etc.?

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  • (EXCEL)VBA Spin button which steps through in an sql databases date time

    - by Gulredy
    I have an sql Database table in MySQL which have lots of rows with varied date time values. For example: 2012-08-21 10:10:00 <-- with these date there are around 12 rows 2012-08-21 15:31:00 <-- with these date there are around 5 rows 2012-08-22 11:40:00 <-- with these date there are around 10 rows 2012-08-22 12:17:00 <-- with these date there are around 9 rows 2012-08-22 12:18:00 <-- with these date there are around 7 rows 2012-08-25 07:21:00 <-- with these date there are around 6 rows If the user clicks on the SpinButton1_SpinUp() or SpinButton1_SpinDown() button then it should do the following: The SpinButton1_SpinUp() button should filter out those data from an sql table which is the next after what we are currently on now. Example: We have currently selected: 2012-08-21 15:31:00. The user hits the SpinUp button then the program selects those date from the database, which is the next higher value like this one: 2012-08-22 11:40:00. So the user hits the SpinUp button the data which is selected in the database will change from those with date: 2012-08-21 15:31:00 to those with date: 2012-08-22 11:40:00 The SpinButton1_SpinDown() will do exactly the reverse of the SpinUp button. When the user hits the SpinDown button the data which is selected in the database will change from those with date: 2012-08-21 15:31:00 to those with date 2012-08-21 10:10:00 So I think the date which we are currently on, should be stored in a variable. But on button hit not every bigger or lower data should be selected in the database, only those which are the closest bigger or the closest lower date. How can I do this? I hope I described my problem understandable. My native language is not english, so misunderstandings can occur! Please ask if you don't understand something! Thank you for reading!

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  • environment change in rake task

    - by Mellon
    I am developing Rails v2.3 app with MySQL database and mysql2 gem. I faced a weird situation which is about changing the environment in rake task. (all my setting and configurations for environment and database are correct, no problem for that.) Here is my simple story : I have a rake task like following: namespace :db do task :do_something => :environment do #1. run under 'development' environment my_helper.run_under_development_env #2. change to 'custom' environment RAILS_ENV='custom' Rake::Task['db:create'] Rake::Task['db:migrate'] #3. change back to 'development' environment RAILS_ENV='development' #4. But it still run in 'customer' environment, why? my_helper.run_under_development_env end end The rake task is quite simple, what it does is: 1. Firstly, run a method from my_helper under "development" environment 2. Then, change to "custom" environment and run db:create and db:migrate until now, everything is fine, the environment did change to "custom" 3. Then, change it back again to "development" environment 4. run helper method again under "development" environment But, though I have changed the environment back to "development" in step 3, the last method still run in "custom" environment, why? and how to get rid of it? --- P.S. --- I have also checked a post with the similar situation here, and tried to use the solution there like (in step 2): ActiveRecord::Base.establish_connection('custom') Rake::Task['db:create'] Rake::Task['db:migrate'] to change the database connection instead of changing environment but, the db:create and db:migrate will still run under "development" database, though the linked post said it should run for "custom" database... weird

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  • Foreign keys in MySQL?

    - by icco
    I have been slowly learning SQL the last few weeks. I've picked up all of the relational algebra and the basics of how relational databases work. What I'm trying to do now is learn how it's implemented. A stumbling block I've come across in this, is foreign keys in MySQL. I can't seem to find much about the other than that they exist in the InnoDB storage schema that MySQL has. What is a simple example of foreign keys implemented in MySQL? Here's part of a schema I wrote that doesn't seem to be working if you would rather point out my flaw than show me a working example. CREATE TABLE `posts` ( `pID` bigint(20) NOT NULL auto_increment, `content` text NOT NULL, `time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, `uID` bigint(20) NOT NULL, `wikiptr` bigint(20) default NULL, `cID` bigint(20) NOT NULL, PRIMARY KEY (`pID`), Foreign Key(`cID`) references categories, Foreign Key(`uID`) references users ) ENGINE=InnoDB;

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  • Run SQL scripts on windows mobile installer

    - by Guillermo Vasconcelos
    Hi, We are working on a Windows Mobile 6.5 application. The application is already installed in some devices, and we need to distribute a new version with changes in the database schema (we added a few tables). Is there a way to make a "patch" windows mobile installer that will replace the application and update the embedded SQL database with some scripts? In a normal windows installer we would create a custom action in the installation process to apply the changes in the database, but I'm not sure how to do that for Windows Mobile Thanks.

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  • xml validity with xsd with xsi:nillable element

    - by Laxmikanth Samudrala
    My XML file <tns:SampleInfoResponse xsi:schemaLocation="sampleNS test.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tns="sampleNS"> String String String String String String String String String String String String MY XSD file <xsd:schema targetNamespace="sampleNS" elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="sampleNS" xmlns="http://www.w3.org/2001/XMLSchema"> parser is complaining on <tns:LSampleEnrlDetails/>, the XML file should be <tns:LSampleEnrlDetails xsi:nil="true"/> only for valid file ? By taking out the whole tag also the parser is complaining. I would like to know what possible cases for this tag makes the XML file valid according the above schema when i don't have the data to populate for tag

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  • Convert or strip out "illegal" Unicode characters

    - by Oli
    I've got a database in MSSQL that I'm porting to SQLite/Django. I'm using pymssql to connect to the database and save a text field to the local SQLite database. However for some characters, it explodes. I get complaints like this: UnicodeDecodeError: 'ascii' codec can't decode byte 0x97 in position 1916: ordinal not in range(128) Is there some way I can convert the chars to proper unicode versions? Or strip them out?

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  • sql exception when transferring project from usb to c:\

    - by jello
    I'm working on a C# windows program with Visual Studio 2008. Usually, I work from school, directly on my usb drive. But when I copy the folder on my hard drive at home, an sql exception is unhandled whenever I try to write to the database. it is unhandled at the conn.Open(); line. here's the exception unhandled Database 'L:\system\project\the_project\the_project\bin\Debug\PatientMonitoringDatabase.mdf' already exists. Choose a different database name. Cannot attach the file 'C:\Documents and Settings\Administrator\My Documents\system\project\the_project\the_project\bin\Debug\PatientMonitoringDatabase.mdf' as database 'PatientMonitoringDatabase'. it's weird, because my connection string says |DataDirectory|, so it should work on any drive... here's my connection string: string connStr = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\PatientMonitoringDatabase.mdf; " + "Initial Catalog=PatientMonitoringDatabase; " + "Integrated Security=True";

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  • Entity Framework - avoiding another query

    - by adamjellyit
    I have a requirement to only save data to a table in a database (I don't need to read it) If the record already exists I want to update it otherwise I will add it. It usually exists. My entity context might already hold the object .. if it does I want to find it and use it again without causing it to refresh from the database when I 'find' it i.e. The context holds a collection of entities (rows of a database) I want to find an entity in the collection and only want the context to go to the database if entity is not in the collection. I don't care about the current values of the entity .. I just want to update them. Hope this is clear ..... thanks

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  • Inspect in memory hsqldb while debugging

    - by Albert
    We're using hdsqldb in memory to run junit tests which operate against a database. The db is setup before running each test via a spring configuration. All works fine. Now when a tests fails it can be convinient to be able to inspect the values in the in memory database. Is this possible? If so how? Our url is: jdbc.url=jdbc:hsqldb:mem:testdb;sql.enforce_strict_size=true The database is destroyed after each tests. But when the debugger is running the database should also still be alive. I've tried connecting with the sqldb databaseManager. That works, but I don't see any tables or data. Any help is highly appreciated!

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  • LINQ query and lambda expressions

    - by user329269
    I'm trying to write a LINQ query and am having problems. I'm not sure if lambda expressions are the answer or not but I think they may be. I have two combo boxes on my form: "State" and "Color". I want to select Widgets from my database based on the values of these two dropdowns. My widgets can be in one of the following states: Not Started, In Production, In Finishing, In Inventory, Sold. Widgets can have any color in the 'color' table in the database. The 'state' combobox has selections "Not Sold," "In Production/Finishing", "Not Started," "In Production," "In Finishing," "In Inventory," "Sold." (I hope these are self-explanatory.) The 'color' dropdown has "All Colors," and a separate item for each color in the database. How can I create a LINQ query to select the widgets I want from the database based on the dropdowns?

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