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  • how to convert Database Hierarchical Data to XML using ASP.net 3.5 and LINQ

    - by mahdiahmadirad
    hello guys! i have a table with hierarchical structure. like this: and table data shown here: this strategy gives me the ability to have unbounded categories and sub-categories. i use ASP.net 3.5 SP1 and LINQ and MSSQL Server2005. How to convert it to XML? I can Do it with Dataset Object and ".GetXML()" method. but how to implement it with LINQtoSQL or LINQtoXML??? or if there is another simpler way to perform that? what is your suggestion? the best way? I searched the web but found nothing for .net 3.5 featuers.

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  • Extremely slow insert from Delphi to Remote MySQL Database

    - by MarkRobinson
    Having a major hair-pulling issue with extremely slow inserts from Delphi 2010 to a remote MySQL 5.09 server. So far, I have tried: ADO using MySQL ODBC Driver Zeoslib v7 Alpha I have used batching and direct insert with ADO (using table access), and with Zeos I have used SQL insertion with a Query, then used Table direct mode and also cached updates Table mode using applyupdates and commit. Both technologies I have tried with compression on and off. So far I have seen a pretty much the same across the board 7.5 records per second!!! Now, I would from this point assume that the remote server is just slow, but the MySQL Workbench is amazingly fast, and the Migration toolkit managed the initial migration very quickly (to be honest, I don't recall how quickly - which kind of means that it was quick) I'm just about to try the MyDAC components as we already use SDAC (wish there was a multi-buy discount or that we'd chosen UniDAC instead now!) Any ideas?

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  • Action Controller: Exception - ID not found

    - by Danny McClelland
    Hi Everyone, I am slowly getting the hang of Rails and thanks to a few people I now have a basic grasp of the database relations and associations etc. You can see my previous questions here: http://stackoverflow.com/questions/2714621/rails-database-relationships I have setup my applications models with all of the necessary has_one and has_many :through etc. but when I go to add a kase and choose from a company from the drop down list - it doesnt seem to be assigning the company ID to the kase. You can see a video of the the application and error here: http://screenr.com/BHC You can see a full breakdown of the application and relevant source code at the Git repo here: http://github.com/dannyweb/surveycontrol If anyone could shed some light on my mistake I would be appreciate it very much! Thanks, Danny

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  • XSD data set with Oracle database

    - by Ed Woodcock
    Hi folks, I'm having a major issue with an XSD dataset mapping thingy that I'm using within my current project. We are using XSDs for some data abstraction (it's quicker and debatably more maintainable that using Parameterised SQL or a StoredProc), and on my machine (running in the VS development environment) thy're working fine. However, on the Pre-production server we use for our testing, the XSDs are not working correctly: some method calls will fail with the following error: System.ArgumentException: Value does not fall within the expected range. at Oracle.DataAccess.Client.OracleParameter.set_DbType(DbType value) Has anyone ever encountered this issue before? The methods being called are simple select statements using 1-3 parameters, and as I said before they work fine on my machine.

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  • MySQL Insert Statement Queue

    - by Justin
    We are building an ajax application in which a users input is submitted for processing to a php script. We are currently writing every request to a log file for tracking. I would like to move this tracking into a database table but I do not want to run a insert statement after request. What I would like to do is set up a 'queue' of transactions (inserts and updates) that need to be processed on the MySQL database. I would then set up a cron job or process to check and process the transactions in the queue. Is there something out there that we could build upon or do we have to just write to plain ol' text log files and process them?

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  • asp.net cannot update database

    - by tom
    string ConnectionString = WebConfigurationManager.ConnectionStrings["dbnameConnectionString"].ConnectionString; SqlConnection myConnection = new SqlConnection(ConnectionString); myConnection.Open(); try { string qry = "UPDATE customers SET firstname=@firstname WHERE cid=1"; SqlCommand insertQuery = new SqlCommand(qry, myConnection); insertQuery.Parameters.Add(new SqlParameter("@firstname", txtFirstname.Text)); insertQuery.ExecuteNonQuery(); myConnection.Close(); } catch (Exception ee) { } Any suggestions?

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  • Image gallery control for ASP.Net with filtering capabilities

    - by ks78
    I'm writing an ASP.Net application which needs to display a large number of thumbnails, preferably in a paginated format. These thumbnails will be stored on the server's hard disk, but will have their filenames listed in a SQL Server database. What I want to do is to be able to filter the images being displayed based on criteria within the database. I've looked at the NotesForGallery control, which I really like, but it doesn't seem to have a way to do that. --if I'm wrong, please correct me. Are there any other image gallery type controls, preferably free, that can do what I need? I'm hoping someone can recommend a control or solution that will point me in the right direction. Thanks in advance.

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  • Easiest way to create drop down with database generated options

    - by aarontb
    I'm trying to build a multi-level "game". A randomly generated option (Option1) will trigger other options in a drop down (Option2)...the options in the new drop down will be directly related the to Option1. Option2 will then trigger another drop down with info directly related to Option2 and so forth until reaching OptionEnd...any suggestions, preferably SQL and PHP. Thanks...yeah, I'm a n00b.

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  • GWT Date Picker Format problem when saving a java date through hibernate in postgresql

    - by Noor
    Hi, I am using Java Date and Hibernate which is then being saved in the database (Postgresql). I am not that good in hibernate Part of the Mapping File <property name="DateOfBirth" type="java.util.Date"> <column name="DATEOFBIRTH" /> </property> I am using GWT Date picker Short date format i.e. yyyy-MM-dd. I am getting the value from the date picker using View.getUserDateOfBirth().getValue() But when I am saving the date 2010-11-30 into the datebase it is saving it as 2010-11-30 00:00:00 instead of 2010-11-30 So, I want it to be saved in the database as in this format 2010-11-30?? I have many things such timestamp but i not being able to configure it. I think this part <property name="DateOfBirth" type="java.util.Date"> <column name="DATEOFBIRTH" /> </property> should be changed but I do not know what to change

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  • Duplicate all rows in sql database table

    - by Andrew Welch
    I have a table which contains house details called property. I am creating a localised application, and I have a db table called propertylocalised. In this table is held duplicates of the data and culture column e.g. key culture propertyname 1 en helloproperty 1 fr bonjourproperty At the moment I have all my en culture inserted but I want to duplicate all of those rows and then for every other row insert fr into culture. I obviously only want to do this once, for the purpose of setting up the localisation. Thanks Andy

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  • Can MYSQL filter by date if date is stored as text? ex "02/10/1984"

    - by Roeland
    Hello! I am trying to modify an app for a client which has already a database of over 1000 items. The dates are stored as text in the database with the format "02/10/1984". The system allows you to add and remove fields to the catalog dynamically and it also allows the advanced search to have specific fields be allowed. The problem is that it wasn't designed with dates in mind, so when I set a field as a date, and try to search by a range the query is trying to do a AND (cfv0.value = 01/02/2004 AND cfv0.value <= 05/03/2008) . I can make it so the date range passed is a numeric time value. Is there a way that when sending the query, it takes the text fields (with the date) and converts it to numeric time value so at that point I am basically just comparing numbers which would work fine. I do not have the option to change all the current date to numeric value due to the way the dynamic fields are set up. Thanks guys!

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  • Compact Framework : Read a SQL CE database on a PDA from a PC

    - by CF_Maintainer
    Hello, I have tasked with upgrading a CF Framework 1.1 suite of apps. Currently, the PC starts a server [after confirming via RAPI that the device exists and is connected] and spawns a app on the PDA as the client. The client process on the PDA talks with the db on the PDA and returns records to the PC app [using SQL CE 2.0. OpenNETCF 1.4 for communication/io]. I have a chance to upgrade the PC and PDA suite of apps to Framework 3.5 & CF 3.5 respectively. Due to a business requirement, I cannot get rid of workflow requiring the PC app to show a preview of the work done on the PDA. Question : Are there better ways to achieve the above in general with the constraints I have? I would really appreciate any Ideas/advice.

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  • Saving and retrieving image in SQL database from C# problem

    - by Mobin
    I used this code for inserting records in a person table in my DB System.IO.MemoryStream ms = new System.IO.MemoryStream(); Image img = Image_Box.Image; img.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp); this.personTableAdapter1.Insert(NIC_Box.Text.Trim(), Application_Box.Text.Trim(), Name_Box.Text.Trim(), Father_Name_Box.Text.Trim(), DOB_TimePicker.Value.Date, Address_Box.Text.Trim(), City_Box.Text.Trim(), Country_Box.Text.Trim(), ms.GetBuffer()); but when i retrieve this with this code byte[] image = (byte[])Person_On_Application.Rows[0][8]; MemoryStream Stream = new MemoryStream(); Stream.Write(image, 0, image.Length); Bitmap Display_Picture = new Bitmap(Stream); Image_Box.Image = Display_Picture; it works perfectly fine but if i update this with my own generated Query like System.IO.MemoryStream ms = new System.IO.MemoryStream(); Image img = Image_Box.Image; img.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp); Query = "UPDATE Person SET Person_Image ='"+ms.GetBuffer()+"' WHERE (Person_NIC = '"+NIC_Box.Text.Trim()+"')"; the next time i use the same code for retrieving the image and displaying it as used above . Program throws an exception

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  • Finding gaps (missing records) in database records using SQL

    - by Tony_Henrich
    I have a table with records for every consecutive hour. Each hour has some value. I want a T-SQL query to retrieve the missing records (missing hours, the gaps). So for the DDL below, I should get a record for missing hour 04/01/2010 02:00 AM (assuming date range is between the first and last record). Using SQL Server 2005. Prefer a set based query. DDL: CREATE TABLE [Readings]( [StartDate] [datetime] NOT NULL, [SomeValue] [int] NOT NULL ) INSERT INTO [Readings]([StartDate], [SomeValue]) SELECT '20100401 00:00:00.000', 2 UNION ALL SELECT '20100401 01:00:00.000', 3 UNION ALL SELECT '20100401 03:00:00.000', 45

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  • database transaction

    - by user121196
    If I'm using a mysql client(eg. squirrel) to execute an update query, after 10 seconds, I cancelled the query, would there be partial update or would everything that's done be rolled back?

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  • ASP.NET user database without web.config connection strings

    - by vikp
    Hi, I'm wondering whether it's possible to use built in ASP.NET application services (aspnet_user, aspnet_role etc table) without specifying a connection string in a web.config. At the moment I store connection strings externally, but I keep finding hard-coded connection strings all over the web.config xml, various providers etc. It's driving me crazy. Thank you

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  • How to efficiently SELECT rows from database table based on selected set of values

    - by Chau Chee Yang
    I have a transaction table of 1 million rows. The table has a field name "Code" to keep customer's ID. There are about 10,000 different customer code. I have an GUI interface allow user to render a report from transaction table. User may select arbitrary number of customers for rendering. I use IN operator first and it works for few customers: SELECT * FROM TRANS_TABLE WHERE CODE IN ('...', '...', '...') I quickly run into problem if I select few thousand customers. There is limitation using IN operator. An alternate way is create a temporary table with only one field of CODE, and inject selected customer codes into the temporary table using INSERT statement. I may then using SELECT A.* FROM TRANS_TABLE A INNER JOIN TEMP B ON (A.CODE=B.CODE) This works nice for huge selection. However, there is performance overhead for temporary table creation, INSERT injection and dropping of temporary table. Do you aware of better solution to handle this situation?

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  • Re-use of database object in sub-sonic

    - by cantabilesoftware
    Yet another newbie SubSonic/ActiveRecord question. Suppose I want to insert a couple of records, currently I'm doing this: using (var scope = new System.Transactions.TransactionScope()) { // Insert company company c = new company(); c.name = "ACME"; c.Save(); // Insert some options company_option o = new company_option(); o.name = "ColorScheme"; o.value = "Red"; o.company_id = c.company_id; o.Save(); o = new company_option(); o.name = "PreferredMode"; o.value = "Fast"; o.company_id = c.company_id; o.Save(); scope.Complete(); } Stepping through this code however, each of the company/company_option constructors go off and create a new myappDB object which just seems wasteful. Is this the recommended approach or should I be trying to re-use a single DB object - and if so, what's the easiest way to do this?

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  • Using DateDiff in Entity Framwork on a SQL CE database

    - by deverop
    I have a method which should return a list of anonymous objects with a calculated column like this: var tomorrow = DateTime.Today.AddDays(1); return from t in this.Events where (t.StartTime >= DateTime.Today && t.StartTime < tomorrow && t.EndTime.HasValue) select new { Client = t.Activity.Project.Customer.Name, Project = t.Activity.Project.Name, Task = t.Activity.Task.Name, Rate = t.Activity.Rate.Name, StartTime = t.StartTime, EndTime = t.EndTime.Value, Hours = (System.Data.Objects.SqlClient.SqlFunctions.DateDiff("m", t.StartTime, t.EndTime.Value) / 60), Description = t.Activity.Description }; Unfortunately I get the following error from the DateDiff function: The specified method 'System.Nullable1[System.Int32] DateDiff(System.String, System.Nullable1[System.DateTime], System.Nullable`1[System.DateTime])' on the type 'System.Data.Objects.SqlClient.SqlFunctions' cannot be translated into a LINQ to Entities store expression. Any ideas what I could have done wrong here? EDIT: I also tried the EntityFunctions class mentioned here, but that did not work as well. Minutes = EntityFunctions.DiffMinutes(t.EndTime, t.StartTime),

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  • How to think in data stores instead of databases?

    - by Jim
    As an example, Google App Engine uses data stores, not a database, to store data. Does anybody have any tips for using data stores instead of databases? It seems I've trained my mind to think 100% in object relationships that map directly to table structures, and now it's hard to see anything differently. I can understand some of the benefits of data stores (e.g. performance and the ability to distribute data), but some good database functionality is sacrificed (e.g. joins). Does anybody who has worked with data stores like BigTable have any good advice to working with them?

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  • Dynamic data-entry value store

    - by simendsjo
    I'm creating a data-entry application where users are allowed to create the entry schema. My first version of this just created a single table per entry schema with each entry spanning a single or multiple columns (for complex types) with the appropriate data type. This allowed for "fast" querying (on small datasets as I didn't index all columns) and simple synchronization where the data-entry was distributed on several databases. I'm not quite happy with this solution though; the only positive thing is the simplicity... I can only store a fixed number of columns. I need to create indexes on all columns. I need to recreate the table on schema changes. Some of my key design criterias are: Very fast querying (Using a simple domain specific query language) Writes doesn't have to be fast Many concurrent users Schemas will change often Schemas might contain many thousand columns The data-entries might be distributed and needs syncronization. Preferable MySQL and SQLite - Databases like DB2 and Oracle is out of the question. Using .Net/Mono I've been thinking of a couple of possible designs, but none of them seems like a good choice. Solution 1: Union like table containing a Type column and one nullable column per type. This avoids joins, but will definitly use a lot of space. Solution 2: Key/value store. All values are stored as string and converted when needed. Also use a lot of space, and of course, I hate having to convert everything to string. Solution 3: Use an xml database or store values as xml. Without any experience I would think this is quite slow (at least for the relational model unless there is some very good xpath support). I also would like to avoid an xml database as other parts of the application fits better as a relational model, and being able to join the data is helpful. I cannot help to think that someone has solved (some of) this already, but I'm unable to find anything. Not quite sure what to search for either... I know market research is doing something like this for their questionnaires, but there are few open source implementations, and the ones I've found doesn't quite fit the bill. PSPP has much of the logic I'm thinking of; primitive column types, many columns, many rows, fast querying and merging. Too bad it doesn't work against a database.. And of course... I don't need 99% of the provided functionality, but a lot of stuff not included. I'm not sure this is the right place to ask such a design related question, but I hope someone here has some tips, know of any existing work, or can point me to a better place to ask such a question. Thanks in advance!

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  • how to add data to database from rails console

    - by rails_guy
    I have a User model. >> @u = User.new => #<User id: nil, userid: nil, password: nil, created_at: nil, updated_at: nil, user_first_name: nil, user_last_name: nil, user_status: nil, user_type: nil> I am not able to add data to the Users table from the console. I am doing the following: >> @u.userid="test1" => "test1" >> @u.password="test2" => "test2" >> @u.user_first_name="test3" => "test3" >> @u.user_last_name="test4" => "test4" >> @u.user_status="test5" => "test5" >> @u.user_type="test6" => "test6" >> @u.save NoMethodError: undefined method `userid' for nil:NilClass what am i doing wrong? I just simply want to add one row of data to the app.

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  • Personal project/idea database and tracking

    - by cbrulak
    How do you keep track of your personal projects and ideas? If you come up with this amazing idea how do you write it down? Notepad? Some text file somewhere? How do you track your progress,etc? I'm not talking about FogBugz,etc as they are for tracking team work, I'm talking about tracking my ideas and projects and any associated content (notes,screenshots,etc) Can you put your solution on a thumb drive? Any suggestions for other developers?

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