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  • SQL statement with datetimepicker

    - by David Archer
    This should hopefully be a simple one. When using a date time picker in a windows form, I want an SQL statement to be carried out, like so: string sql = "SELECT * FROM Jobs WHERE JobDate = '" + dtpJobDate.Text + "'"; Unfortunately, this doesn't actually provide any results because the JobDate field is stored as a DateTime value. I'd like to be able to search for all records that are on this date, no matter what the time stored may be, any help? New query: SqlDataAdapter da2 = new SqlDataAdapter(); SqlCommand cmd = new SqlCommand(); cmd.CommandText = "SELECT * FROM Jobs WHERE JobDate >= @p_StartDate AND JobDate < @p_EndDate"; cmd.Parameters.Add ("@p_StartDate", SqlDbType.DateTime).Value = dtpJobDate.Value.Date; cmd.Parameters.Add ("@p_EndDate", SqlDbType.DateTime).Value = dtpJobDate.Value.Date.AddDays(1); cmd.Connection = conn; da2.SelectCommand = cmd; da2.Fill(dt); dgvJobDiary.DataSource = dt; Huge thanks for all the help!

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  • Borland linker error

    - by david-tran
    Hello, I am recompling a project using Borland C++ Builder 6 and LMD tool 2010. The recompile process failed due to linker error. The message was: "[Linker Fatal error] Fatal unable to open file LMDOneInstance.OBJ" I searched the whole hard drive, but could not find any reference to LMDOneInstance.OBJ Any help is appreciated. Thanks in advance. David

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  • ASP.Net double-click problem

    - by David Archer
    Hi there, having a slight problem with an ASP.net page of mine. If a user were to double click on a "submit" button it will write to the database twice (i.e. carry out the 'onclick' method on the imagebutton twice) How can I make it so that if a user clicks on the imagebutton, just the imagebutton is disabled? I've tried: <asp:ImageButton runat="server" ID="VerifyStepContinue" ImageUrl=image src ToolTip="Go" TabIndex="98" CausesValidation="true" OnClick="methodName" OnClientClick="this.disabled = true;" /> But this OnClientClick property completely stops the page from being submitted! Any help? Sorry, yes, I do have Validation controls... hence the icky problem.

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  • How to overcome shortcomings in reporting from EAV database?

    - by David Archer
    The major shortcomings with Entity-Attribute-Value database designs in SQL all seem to be related to being able to query and report on the data efficiently and quickly. Most of the information I read on the subject warn against implementing EAV due to these problems and the commonality of querying/reporting for almost all applications. I am currently designing a system where almost all the fields necessary for data storage are not known at design/compile time and are defined by the end-user of the system. EAV seems like a good fit for this requirement but due to the problems I've read about, I am hesitant in implementing it as there are also some pretty heavy reporting requirements for this system as well. I think I've come up with a way around this but would like to pose the question to the SO community. Given that typical normalized database (OLTP) still isn't always the best option for running reports, a good practice seems to be having a "reporting" database (OLAP) where the data from the normalized database is copied to, indexed extensively, and possibly denormalized for easier querying. Could the same idea be used to work around the shortcomings of an EAV design? The main downside I see are the increased complexity of transferring the data from the EAV database to reporting as you may end up having to alter the tables in the reporting database as new fields are defined in the EAV database. But that is hardly impossible and seems to be an acceptable tradeoff for the increased flexibility given by the EAV design. This downside also exists if I use a non-SQL data store (i.e. CouchDB or similar) for the main data storage since all the standard reporting tools are expecting a SQL backend to query against. Do the issues with EAV systems mostly go away if you have a seperate reporting database for querying? EDIT: Thanks for the comments so far. One of the important things about the system I'm working on it that I'm really only talking about using EAV for one of the entities, not everything in the system. The whole gist of the system is to be able to pull data from multiple disparate sources that are not known ahead of time and crunch the data to come up with some "best known" data about a particular entity. So every "field" I'm dealing with is multi-valued and I'm also required to track history for each. The normalized design for this ends up being 1 table per field which makes querying it kind of painful anyway. Here are the table schemas and sample data I'm looking at (obviously changed from what I'm working on but I think it illustrates the point well): EAV Tables Person ------------------- - Id - Name - ------------------- - 123 - Joe Smith - ------------------- Person_Value ------------------------------------------------------------------- - PersonId - Source - Field - Value - EffectiveDate - ------------------------------------------------------------------- - 123 - CIA - HomeAddress - 123 Cherry Ln - 2010-03-26 - - 123 - DMV - HomeAddress - 561 Stoney Rd - 2010-02-15 - - 123 - FBI - HomeAddress - 676 Lancas Dr - 2010-03-01 - ------------------------------------------------------------------- Reporting Table Person_Denormalized ---------------------------------------------------------------------------------------- - Id - Name - HomeAddress - HomeAddress_Confidence - HomeAddress_EffectiveDate - ---------------------------------------------------------------------------------------- - 123 - Joe Smith - 123 Cherry Ln - 0.713 - 2010-03-26 - ---------------------------------------------------------------------------------------- Normalized Design Person ------------------- - Id - Name - ------------------- - 123 - Joe Smith - ------------------- Person_HomeAddress ------------------------------------------------------ - PersonId - Source - Value - Effective Date - ------------------------------------------------------ - 123 - CIA - 123 Cherry Ln - 2010-03-26 - - 123 - DMV - 561 Stoney Rd - 2010-02-15 - - 123 - FBI - 676 Lancas Dr - 2010-03-01 - ------------------------------------------------------ The "Confidence" field here is generated using logic that cannot be expressed easily (if at all) using SQL so my most common operation besides inserting new values will be pulling ALL data about a person for all fields so I can generate the record for the reporting table. This is actually easier in the EAV model as I can do a single query. In the normalized design, I end up having to do 1 query per field to avoid a massive cartesian product from joining them all together.

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  • StructureMap for Silverlight

    - by David Whitten
    Hey fellow coders, Has anyone tried to port the current StructureMap source to work with Silverlight? I know there are other IOC containers for Silverlight like Unity, Ninject, and a few others, but I particularly like the ease of use with StrutureMap. Anyways, I'm on a quest at the moment to get it working with SL. Let me know your thoughts if this is really worth doing? Seems like something fun to do. Thanks, David

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  • Lucene complex structure search

    - by archer
    Basically I do have pretty simple database that I'd like to index with Lucene. Domains are: // Person domain class Person { Set<Pair> keys; } // Pair domain class Pair { KeyItem keyItem; String value; } // KeyItem domain, name is unique field within the DB (!!) class KeyItem{ String name; } I've tens of millions of profiles and hundreds of millions of Pairs, however, since most of KeyItem's "name" fields duplicates, there are only few dozens KeyItem instances. Came up to that structure to save on KeyItem instances. Basically any Profile with any fields could be saved into that structure. Lets say we've profile with properties - name: Andrew Morton - eduction: University of New South Wales, - country: Australia, - occupation: Linux programmer. To store it, we'll have single Profile instance, 4 KeyItem instances: name, education,country and occupation, and 4 Pair instances with values: "Andrew Morton", "University of New South Wales", "Australia" and "Linux Programmer". All other profile will reference (all or some) same instances of KeyItem: name, education, country and occupation. My question is, how to index all of that so I can search for Profile for some particular values of KeyItem::name and Pair::value. Ideally I'd like that kind of query to work: name:Andrew* AND occupation:Linux* Should I create custom Indexer and Searcher? Or I could use standard ones and just map KeyItem and Pair as Lucene components somehow?

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  • Objective C iPhone save text

    - by David Maitland
    How is it possible to save text from a text field when the user quit's the app then when the user re opens the app the text appears back in the same text box, can this be done with out a save button? What code is needed for the text to be saved and what action is needed for doing this when the app is opened? Thanks, David

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  • Grails 1.2.1 with Spring 3.0.0 dependency problem under Jetty

    - by archer
    Just moved to Grails 1.2.1 (used 1.1.1 before). Changed application.properties, ran grails upgrade, fixed BuildConfig and Bootstrap - everything works just fine from grails console. However, getting a problem when deploy packaged war under jetty 6.1.22: 1581 [main] ERROR org.springframework.web.context.ContextLoader - Context initialization failed org.springframework.beans.factory.access.BootstrapException: Error executing bootstraps; nested exception is java.lang.NoSuchMethodError: org.codehaus.groovy.grails.commons.spring.ReloadAwareAutowireCapableBeanFactory.setParameterNameDiscoverer(Lorg/springframework/core/ParameterNameDiscoverer;)V My project is built with maven2. I researched the war dependencies and see that both spring 2.5.6 and 3.0.0.RELEASE are used there. I then tried to suppress use of spring 2.5.6 and got a problem with Acegi plugin (using version 0.5.1): 2010-03-10 21:06:56.440:WARN::Nested in org.springframework.beans.factory.access.BootstrapException: Error executing bootstraps; nested exception is java.lang.NoSuchMethodError: org.springframework.web.context.ConfigurableWebApplicationContext.setId(Ljava/lang/String;)V Any help would be greatly appreciated.

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  • c# linq to xml dynamic query

    - by David Archer
    Right, bit of a strange question; I have been doing some linq to XML work recently (see my other recent posts here and here). Basically, I want to be able to create a query that checks whether a textbox is null before it's value is included in the query, like so: XDocument db = XDocument.Load(xmlPath); var query = (from vals in db.Descendants("Customer") where (if(textbox1.Text != "") {vals.Element("CustomerID") == Convert.ToInt32(textbox1.Text) } || if(textbox2.Text != "") {vals.Element("Name") == textbox2.Text}) select vals).ToList();

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  • How do the readers fields should work like?

    - by David Marko
    In release notes of CouchDB 0.11 is stated, that it supports readers fields. I guess it should work similary as in Lotus Notes. But unfortunately I cant find any documentation on this topic. Can someone point me to documentation or some brief explanation at least? Thank you David

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  • automating write conflict messages

    - by archer
    is there any method to avoid the annoying write conflict messages by automating and hiding the process so that it doesn't appear as if the program is defective? there doesn't seem to be any point to these messages anyway as there is only one real choice which is to drop the changes.

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  • Ruby SerialPorts

    - by Seth Archer
    I'm using the ruby serial port gem. After I open up the port I send the data I want like this. sp.write [200.chr, 30.chr, 7.chr, 5.chr, 1.chr, 2.chr, 0.chr, 245.chr].to_s It doesn't work, but if I put it in a loop of around 200 times: 200.times do sp.write [200.chr, 30.chr, 7.chr, 5.chr, 1.chr, 2.chr, 0.chr, 245.chr].to_s end It works. Any ideas on why this is happening?

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  • ClickOnce Deployment online questions

    - by David Archer
    Hi all, Bit of a strange question, but how do ClickOnce deployments work from a web site? I seem to be having some problems with this. Basically, the setup file will download when you click the "install" button, but then some files are missing. Do you need to be on a Microsoft server to run ClickOnce deployments? I usually do deployments over a local server with UNC, and as this is the first time I've done one online I'm struggling a bit. Any newbie tutorials you can point me to would be great, and if I do need a special host for it, could you please recommend some? Cheers!

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  • How to reliably retrieve tables and columns information stored in Torque Criteria object

    - by David Zhao
    Hi there, Is there a way to retrieve tables, including alias tables, and columns, including alias columns, from an Apache Torque Criteria object reliably? I understand that there is methods like: getSelectedColumns, getAsColumns(), getJoins(), etc., but for examples, getJoins() will just return a list of joined tables strings in free text, where one has to use regular expression to extract the needed joined table information out of it. Thanks in advance! David

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