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  • Silverlight 4 + RIA Services: Ready for Business: Updating Data in the Client

    To continue our series, lets look at updating the data.  I have created a Plates.xaml page with very similar structure to the above.    For details on how I created this page, check out my PDC 09 demo walk through.    Now lets look at updating the Plate data.. First we will create some default form UI by dragging an entity from the datasources window in much the same way we did above.  But before we create the UI, notice the order of the fields it...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Ad-hoc reporting similar to Microstrategy/Pentaho - is OLAP really the only choice (is OLAP even sufficient)?

    - by TheBeefMightBeTough
    So I'm getting ready to develop an API in Java that will provide all dimensions, metrics, hierarchies, etc to a user such that they can pick and choose what they want (say, e.g., dimensions of Location (a store) and Weekly, and the metric Product Sales $), provide their choices to the api, and have it spit out an object that contains the answer to their question (the object would probably be a set of cells). I don't even believe there will be much drill up/down. The data warehouse the APIwill interface with is in a standard form (FACT tables, dimensions, star schema format). My question is, is an OLAP framework such as Mondrian the only way to achieve something akin to ad-hoc reporting? I can envisage a really large Cube (or VirtualCube) that contains most of the dimensions and metrics the user could ever want, which would give the illusion of ad-hoc reporting. The problem is that there is a ton of setup to do (so much XML) to get the framework to work with the data. Further it requires specific knowledge, such as MDX, and even moreso learning the framework peculiars (Mondrian API). Finally, I am not positive it will scale much better than simply making queries against a SQL database. OLAP to me feels like very old technology. Is performance really an issue anymore? The alternative I can think of would be dynamic SQL. If the existing tables in the data warehouse conform to a naming scheme (FACT_, DIM_, etc), or if a very simple config file/ database table containing config information existed that stored which tables are fact tables, which are dimensions, and what metrics are available, then couldn't the api read from that and assembly the appropriate sql query? Would this necessarily be harder than learning MDX, Mondrian (or another OLAP framework), and creating all the cubes? In general, I feel that OLAP is at the same time too powerful (supports drill up/down, complex functions) and outdated and am reluctant to base my architecture on it. However, I am unsure if the alternative(s), such as rolling my own ad-hoc reporting framework using dynamic SQL would remove any complexity while still fulfilling requirements, both functional and non-functional (e.g., scalability; some FACT tables have many millions of rows). I also wonder about other techniques (e.g., hive). Has anyone here tried to do ad-hoc reporting? Any advice? I expect this project to take a pretty long time (3 months min, but probably longer), so I just do not want to commit to an architecture without being absolutely sure of its pros and cons. Thanks so much.

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  • How to restore my D Drive

    - by buggi
    I need help in recovering one of my drives from my windows7 machine. I used to have two drives, c and d. I used D to save all my data. i have been using my laptop from 3years. and when I saw it today, i cant find D drive on my computer :( . When I opened the parititioning wizard it showed me that the space I allocated for D is there but as unallocated space. I badly need the data from D. Can you please suggest if I can use ubuntu to recover D? Thanks in advance.

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  • PHP - Data Access Layer

    - by scarpacci
    I am currently reviewing a code base and noticed that a majority of the calls (along with DB connections) are just buried inside the PHP scripts. I would have assumed that like other languages they would have developed some sort of data access layer (Like I would do in .Net or Java) for all of the communication to the DB (or implemented MVC, etc). Is this still a common pattern in PHP or is there alternative methodologies/patterns for this technology? I am just trying to understand why the subs would have developed it this way. Any insight/info on how experienced developers design an approach data access in PHP would be very much appreciated.

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  • Introduction to the SQL Server Analysis Services Neural Network Data Mining Algorithm

    In data mining and machine learning circles, the neural network is one of the most difficult algorithms to explain. Fortunately, SQL Server Analysis Services allows for a simple implementation of the algorithm for data analytics. Dallas Snider explains 24% of devs don’t use database source control – make sure you aren’t one of themVersion control is standard for application code, but databases haven’t caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out…

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  • Organizing your Data Access Layer

    - by nighthawk457
    I am using Entity Framework as my ORM in an ASP.Net application. I have my database already created so ended up generating the entity model from it. What is a good way to organize files/classes in the data access layer. My entity framework model is in a class library and I was planning on adding additional classes per Entity(i.e per database table) and putting all the queries related to those tables in their respective classes. I am not sure if this is a right approach and if it is then where do the queries requiring data from multiple tables go? Am I completely wrong in organizing my files based on entities/tables and should I organize them based on functional areas instead.

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  • Converting obj data to CSS3D

    - by Don Boots
    I found a ton of formulae and what not, but 3D isn't my forte so I'm at a loss of what specifically to use. My goal is to convert the data in an 3D .obj file (vertices, normals, faces) to CSS3D (width, height, rotateX,Y,Z and/or similar transforms). For example 2 simple planes g plane1 # simple along along Z axis v 0.0 0.0 0.0 v 0.0 0.0 1.0 v 0.0 1.0 1.0 v 0.0 1.0 0.0 g plane2 # plane rotated 90 degrees along Y-axis v 0.0 0.0 0.0 v 0.0 1.0 0.0 v 1.0 1.0 0.0 v 1.0 0.0 0.0 f 1 2 3 4 f 5 6 7 8 Could this data be converted to: #plane1 { width: X; height: Y; transform: rotateX(Xdeg) rotateY(Ydeg) rotateZ(Zdeg) translateZ(Zpx) } #plane2 { width: X; height: Y; transform: rotateX(Xdeg) rotateY(Ydeg) rotateZ(Zdeg) translateZ(Zpx) } /* Or something equivalent such as transform: matrix3d() */ In summary, while this may be too HTML/CSS-y for game development, the core question is how to get the X/Y/Z-rotation of a 4 point plane from it's matrix of x,y,z coordinates?

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  • How do I recover my accidentally lost Windows partitions after installing Ubuntu?

    - by Totally newbie
    I have a Toshiba satellite A-200 laptop with a Vista OS on it with 4 NTFS partitions (C:) Vista (D:) Entertainment (E:) Work (F:) Sources and I wanted to start using Ubuntu instead. So I tried it first from the live CD and everything was OK and all the partitions were shown and working and so I decided to install Ubuntu to replace Vista on the (C:) drive. After I did that I can no longer find my folders and files on the (D:), (E:), (F:) partitions and the only file system that is shown is one 198 GB although my HDD is 320 GB. I can't access the lost data on the remaining 120 GB which I hope is still there and not totally lost I am now working from the live CD but I am unable to install testdisk. Can I recover the Vista partitions by the product recovery CD to get my laptop back to the factory settings? Can I recover the NTFS partitions using a recovery program for Windows or will that make the problem worse? I need these data badly as I don't have a backup for them.

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  • Ubuntu crashed during the update to 12.04, not I can't recover my files, help please

    - by mrah
    I'm pretty new to Linux and I've only installed Ubuntu as I couldn't afford to buy Windows, worked well and I liked it. But I chose to upgrade it to the newest version after a prompt. The update froze and the machine was unresponsive which forced me to hard reboot it. Now nothing seems to load and I've reached my wits end (mainly cos I'm lost in all the command lines). I've decided to try and recover my data from the hard drive, only two folders, by selecting the try Ubuntu option when I insert the OS CD into the machine. The problem I'm experiencing now is it won't let me copy my folders, I get a 'The folder contents could not be displayed. You do not have the permissions necessary to view the contents of "folder_name".' Does anyone know how I can recover this data?

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  • android application that visualize real time data

    - by matarsak
    I want to build and android app that visualize real time data , I set up a UDP channel that get the data , now I want to visualize it . I now that I can use openGL ES. but I have now back ground and in a few weeks I dont think that i'm able to learn that . what about android processing ? could it be used for extensive visualization task like this? or it's limited ? I heard it's not hard to learn that. any other option ?

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  • Partition Hard Drive For Data

    - by user211779
    Greetings ~ I am a new Linux/Ubuntu user. For various reasons (mostly my own ignorance) I am on my third install of Ubuntu 12.04. I want to partition the hard drive to create a drive for data and personal files in case I ever have to install again. I have been struggling all afternoon to make a gparted live USB. Tuxboot looked like the answer but I get an error message when using it. So, I am asking for help. Ultimately, I want to partition the hard drive for data and personal files. What do you recommend?

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  • How to bind Data to Dropdownlist in Kendo Ui Mobile

    - by dinesh Haraveer
    I have been using Kendo Mobile to develop an application, previously same application i have done in Kendo web,it's works fine.The main problem is that i have to bind data to two dropdownlist which the below code i have written,when my application is running it show an error like "Microsoft JScript runtime error: Object doesn't support property or method 'append'". in HTML <div id="forms" data-role="view" data-title="Form Elements" data-init="initForm"> <table> <tr> <td> <label style="margin-left: 20px"> Company:</label> </td> <td> <select id="ddlCompany" style="width: 200px"> <option>Select Company</option> </select> </td> <td class="style1"> <label style="margin-left: 20px"> Category:</label> </td> <td> <select id="ddlCategory" style="width: 200px"> <option>Select Category</option> </select> </td> <td> <label style="margin-left: 20px"> Product :</label> </td> <td> <select id="ddlProduct" style="width: 200px"> <option>Select Product</option> </select> </td> </tr> </table> </div> function initForm() { $.ajax({ type: "POST", contentType: "application/json; charset=utf-8", url: "FlashReportMobileWebService.asmx/GetCompany", dataType: "json", success: function (data) { for (i = 0; i < data.d.length; i++) { ddlCompany.append($("<option></option>").val(data.d[i].Company).html(data.d[i].Company)); }; $("#ddlCompany").kendoDropDownList(); } }); $.ajax({ type: "POST", contentType: "application/json; charset=utf-8", url: "FlashReportMobileWebService.asmx/ToCategoryDropDown", dataType: "json", success: function (data) { for (i = 0; i < data.d.length; i++) { ddlCategory.append($("<option></option>").val(data.d[i].Category).html(data.d[i].Category)); }; $("#ddlCategory").kendoDropDownList(); }, failure: function (msg) { alert(msg); } }); } $("#ddlCategory").change( function (e) { var ddlProduct= $("#ddlProduct"); var dataItem = $("#ddlCategory").val(); $.ajax({ type: "POST", contentType: "application/json; charset=utf-8", data: "{'Category':'" + dataItem + "'}", url: "FlashReportWebService.asmx/ToFillProductDropDown", dataType: "json", success: function (data) { ddlProduct.empty(); for (i = 0; i < data.d.length; i++) { ddlProduct.append($("<option></option>").val(data.d[i].ProductName).html(data.d[i].ProductName)); }; $("#ddlProduct").kendoDropDownList(); }, failure: function (msg) { alert(msg); } }); }); var app = new kendo.mobile.Application(document.body); thanks for reading this

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  • Ext.data.Store, Javascript Arrays and Ext.grid.ColumnModel

    - by Michael Wales
    I am using Ext.data.Store to call a PHP script which returns a JSON response with some metadata about fields that will be used in a query (unique name, table, field, and user-friendly title). I then loop through each of the Ext.data.Record objects, placing the data I need into an array (this_column), push that array onto the end of another array (columns), and eventually pass this to an Ext.grid.ColumnModel object. The problem I am having is - no matter which query I am testing against (I have a number of them, varying in size and complexity), the columns array always works as expected up to columns[15]. At columns[16], all indexes from that point and previous are filled with the value of columns[15]. This behavior continues until the loop reaches the end of the Ext.data.Store object, when the entire arrays consists of the same value. Here's some code: columns = []; this_column = []; var MetaData = Ext.data.Record.create([ {name: 'id'}, {name: 'table'}, {name: 'field'}, {name: 'title'} ]); // Query the server for metadata for the query we're about to run metaDataStore = new Ext.data.Store({ autoLoad: true, reader: new Ext.data.JsonReader({ totalProperty: 'results', root: 'fields', id: 'id' }, MetaData), proxy: new Ext.data.HttpProxy({ url: 'index.php/' + type + '/' + slug }), listeners: { 'load': function () { metaDataStore.each(function(r) { this_column['id'] = r.data['id']; this_column['header'] = r.data['title']; this_column['sortable'] = true; this_column['dataIndex'] = r.data['table'] + '.' + r.data['field']; // This display valid information, through the entire process console.info(this_column['id'] + ' : ' + this_column['header'] + ' : ' + this_column['sortable'] + ' : ' + this_column['dataIndex']); columns.push(this_column); }); // This goes nuts at columns[15] console.info(columns); gridColModel = new Ext.grid.ColumnModel({ columns: columns });

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  • iPhone Core Data Lightweight Migration error: reason = "Can't find model for source store";

    - by tul697
    Steps taken: 1. Added Data Model version: Changed my XXX.xcdatamodel to XXX.xcdatamodeId with Design - Data Model - Add Model Version. Set the new XXX 2.xcdatamodel as current version Added an attribute to XXX 2.xcdatamodel Added NSMigratePersistentStoresAutomaticallyOption and NSInferMappingModelAutomaticallyOption like most tutorials, I added the option in the addPersistentStoreWithType. ran the code and I got this error: Unresolved error Error Domain=NSCocoaErrorDomain Code=134130 UserInfo=0x146bb80 "Operation could not be completed. (Cocoa error 134130.)", { URL = file://localhost/Users/tleung/Library/Application%20Support/iPhone%20Simulator/3.0/Applications/B585CDFC-17C3-4A44-84E2-0B75893C46B8/Documents/favorites.sqlite; metadata = { NSPersistenceFrameworkVersion = 241; NSStoreModelVersionHashes = { City = <70ea1f9f aaa9af29 52d2bfe4 3071d97f 8224f765 d69928d5 e5844120 52742a35; StationStore = <40d8093a 1d7d00ec 178b4374 36dfc137 ccfa3a88 87e2d467 69e8ae7e d4c49dbb; }; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers = ( ); NSStoreType = SQLite; NSStoreUUID = "9DD342A6-1F68-4997-A097-096DC96D7BF3"; }; reason = "Can't find model for source store"; } I've also tried NSString *path = [[NSBundle mainBundle] pathForResource:@"YOURDB" ofType:@"momd"]; NSURL *momURL = [NSURL fileURLWithPath:path]; managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:momURL]; as suggested by other posts with no success. It seems that it can't find ANY of my models... anyone have any idea?

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