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  • Trouble updating my datagrid in WPF

    - by wrigley06
    As the title indicates, I'm having trouble updating a datagrid in WPF. Basically what I'm trying to accomplish is a datagrid, that is connected to a SQL Server database, that updates automatically once a user enters information into a few textboxes and clicks a submit button. You'll notice that I have a command that joins two tables. The data from the Quote_Data table will be inserted by a different user at a later time. For now my only concern is getting the information from the textboxes and into the General_Info table, and from there into my datagrid. The code, which I'll include below compiles fine, but when I hit the submit button, nothing happens. This is the first application I've ever built working with a SQL Database so many of these concepts are new to me, which is why you'll probably look at my code and wonder what is he thinking. public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } public DataSet mds; // main data set (mds) private void Window_Loaded_1(object sender, RoutedEventArgs e) { try { string connectionString = Sqtm.Properties.Settings.Default.SqtmDbConnectionString; using (SqlConnection connection = new SqlConnection(connectionString)) { connection.Open(); //Merging tables General_Info and Quote_Data SqlCommand cmd = new SqlCommand("SELECT General_Info.Quote_ID, General_Info.Open_Quote, General_Info.Customer_Name," + "General_Info.OEM_Name, General_Info.Qty, General_Info.Quote_Num, General_Info.Fab_Drawing_Num, " + "General_Info.Rfq_Num, General_Info.Rev_Num, Quote_Data.MOA, Quote_Data.MOQ, " + "Quote_Data.Markup, Quote_Data.FOB, Quote_Data.Shipping_Method, Quote_Data.Freight, " + "Quote_Data.Vendor_Price, Unit_Price, Quote_Data.Difference, Quote_Data.Vendor_NRE_ET, " + "Quote_Data.NRE, Quote_Data.ET, Quote_Data.STI_NET, Quote_Data.Mfg_Time, Quote_Data.Delivery_Time, " + "Quote_Data.Mfg_Name, Quote_Data.Mfg_Location " + "FROM General_Info INNER JOIN dbo.Quote_Data ON General_Info.Quote_ID = Quote_Data.Quote_ID", connection); SqlDataAdapter da = new SqlDataAdapter(cmd); DataTable dt = new DataTable(); da.Fill(dt); MainGrid.ItemsSource = dt.DefaultView; mds = new DataSet(); da.Fill(mds, "General_Info"); MainGrid.DataContext = mds.Tables["General_Info"]; } } catch (Exception ex) { MessageBox.Show(ex.Message); } // renaming column names from the database so they are easier to read in the datagrid MainGrid.Columns[0].Header = "#"; MainGrid.Columns[1].Header = "Date"; MainGrid.Columns[2].Header = "Customer"; MainGrid.Columns[3].Header = "OEM"; MainGrid.Columns[4].Header = "Qty"; MainGrid.Columns[5].Header = "Quote Number"; MainGrid.Columns[6].Header = "Fab Drawing Num"; MainGrid.Columns[7].Header = "RFQ Number"; MainGrid.Columns[8].Header = "Rev Number"; MainGrid.Columns[9].Header = "MOA"; MainGrid.Columns[10].Header = "MOQ"; MainGrid.Columns[11].Header = "Markup"; MainGrid.Columns[12].Header = "FOB"; MainGrid.Columns[13].Header = "Shipping"; MainGrid.Columns[14].Header = "Freight"; MainGrid.Columns[15].Header = "Vendor Price"; MainGrid.Columns[16].Header = "Unit Price"; MainGrid.Columns[17].Header = "Difference"; MainGrid.Columns[18].Header = "Vendor NRE/ET"; MainGrid.Columns[19].Header = "NRE"; MainGrid.Columns[20].Header = "ET"; MainGrid.Columns[21].Header = "STINET"; MainGrid.Columns[22].Header = "Mfg. Time"; MainGrid.Columns[23].Header = "Delivery Time"; MainGrid.Columns[24].Header = "Manufacturer"; MainGrid.Columns[25].Header = "Mfg. Location"; } private void submitQuotebtn_Click(object sender, RoutedEventArgs e) { CustomerData newQuote = new CustomerData(); int quantity; quantity = Convert.ToInt32(quantityTxt.Text); string theDate = System.DateTime.Today.Date.ToString("d"); newQuote.OpenQuote = theDate; newQuote.CustomerName = customerNameTxt.Text; newQuote.OEMName = oemNameTxt.Text; newQuote.Qty = quantity; newQuote.QuoteNumber = quoteNumberTxt.Text; newQuote.FdNumber = fabDrawingNumberTxt.Text; newQuote.RfqNumber = rfqNumberTxt.Text; newQuote.RevNumber = revNumberTxt.Text; try { string insertConString = Sqtm.Properties.Settings.Default.SqtmDbConnectionString; using (SqlConnection insertConnection = new SqlConnection(insertConString)) { insertConnection.Open(); SqlDataAdapter adapter = new SqlDataAdapter(Sqtm.Properties.Settings.Default.SqtmDbConnectionString, insertConnection); SqlCommand updateCmd = new SqlCommand("UPDATE General_Info " + "Quote_ID = @Quote_ID, " + "Open_Quote = @Open_Quote, " + "OEM_Name = @OEM_Name, " + "Qty = @Qty, " + "Quote_Num = @Quote_Num, " + "Fab_Drawing_Num = @Fab_Drawing_Num, " + "Rfq_Num = @Rfq_Num, " + "Rev_Num = @Rev_Num " + "WHERE Quote_ID = @Quote_ID"); updateCmd.Connection = insertConnection; System.Data.SqlClient.SqlParameterCollection param = updateCmd.Parameters; // // Add new SqlParameters to the command. // param.AddWithValue("Open_Quote", newQuote.OpenQuote); param.AddWithValue("Customer_Name", newQuote.CustomerName); param.AddWithValue("OEM_Name", newQuote.OEMName); param.AddWithValue("Qty", newQuote.Qty); param.AddWithValue("Quote_Num", newQuote.QuoteNumber); param.AddWithValue("Fab_Drawing_Num", newQuote.FdNumber); param.AddWithValue("Rfq_Num", newQuote.RfqNumber); param.AddWithValue("Rev_Num", newQuote.RevNumber); adapter.UpdateCommand = updateCmd; adapter.Update(mds.Tables[0]); mds.AcceptChanges(); } } catch (Exception ex) { MessageBox.Show(ex.Message); } } Thanks in advance to anyone who can help, I really appreciate it, Andrew

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  • How to improve INSERT INTO ... SELECT locking behavior

    - by Artem
    In our production database, we ran the following pseudo-code SQL batch query running every hour: INSERT INTO TemporaryTable (SELECT FROM HighlyContentiousTableInInnoDb WHERE allKindsOfComplexConditions are true) Now this query itself does not need to be fast, but I noticed it was locking up HighlyContentiousTableInInnoDb, even though it was just reading from it. Which was making some other very simple queries take ~25 seconds (that's how long that other query takes). Then I discovered that InnoDB tables in such a case are actually locked by a SELECT! http://www.mysqlperformanceblog.com/2006/07/12/insert-into-select-performance-with-innodb-tables/ But I don't really like the solution in the article of selecting into an OUTFILE, it seems like a hack (temporary files on filesystem seem sucky). Any other ideas? Is there a way to make a full copy of an InnoDB table without locking it in this way during the copy. Then I could just copy the HighlyContentiousTable to another table and do the query there.

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  • Will this safely delete my record?

    - by Sergio Tapia
    I hate these three tables that. Two tables have a many to many relationship and as such it generates a third table. I'm using Linq-to-SQL and in the .dbml file I've dragged all the folder there to the graphic surface. Here is the method I'm using to delete an Area safely. Remember that documents are associated to an Area, so I can't just delete it and leave documents hanging. ScansDataContext db = new ScansDataContext(); /// <summary> /// Deletes an Area object from the database along with all associations in the database. /// </summary> /// <param name="area">Area object to save</param> public void Delete(Area area) { db.DocumentAreaRelations.DeleteAllOnSubmit(area.DocumentAreaRelations); db.Areas.DeleteOnSubmit(area); db.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict); }

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  • C# LINQ: Join and Group

    - by Soo
    I have two tables TableA aId aValue TableB bId aId bValue I want to join these two tables via aId, and from there, group them by bValue var result = from a in db.TableA join b in db.TableB on a.aId equals b.aId group b by b.bValue into x select new {x}; My code doesn't recognize the join after the group. In other words, the grouping works, but the join doesn't (or at least I can't figure out how to access all of the data after the join). Any help would be appreciated. I'm a n00b.

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  • Seeting up MySQL database

    - by mathew
    I do have single database and near about 11 tables. while my web page is opening informations from these 11 tables will be accessed same time. according to my current settings what I did now is for each table database is opening and closing. say I had given username and password to open databse for each table and close after retrieving information from that table. Is this the right way to do it?? I feel because of this the database is opeing and closing 11 times!!!! Am I right?? is this the right way to do that?? THanks Mathew

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  • Microsoft Sync Framework - Local DB and Remote DB have to have the same schema?

    - by Josh
    When using MSF, is it implied in the technology that the sync tables are supposed to be 1-1? The reason I'm wondering is that if I'm synching from a SQL2005 database to a SQLCE, I might want the CE one to be a little more flattened out so I can get data out with a simpler SELECT statement (as CE does not support sprocs). For example, I might have a tblCustomer, tblOrder, and tblCustomerOrder in the central database, but in the local databases one table with all the data might be preferred. Of course I'd still want the updates to reflect back and forth between the two databases. Does MSF make this possible, or does the local DB have to have the same tables as the central?

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  • SQL Join a View with a Table

    - by gamerzfuse
    CREATE VIEW qtyorderedview AS SELECT titleditors.title_id, titleditors.ed_id, salesdetails.title_id, salesdetails.qty_shipped FROM titleditors, salesdetails WHERE titleditors.title_id = salesdetails.title_id I am using the above SQL statement to create a view. I need to show Editors First Name, Last Name, City where they shipped more than 50 books. The three tables I have are: create table editors ( ed_id char(11), ed_lname varchar(20), ed_fname varchar(20), ed_pos varchar(12), phone varchar(10), address varchar(30), city varchar(20), state char(2), zip char(5), ed_boss char(11)); create table titleditors ( ed_id char(11), title_id char(6), ed_ord integer); create table salesdetails ( sonum integer, qty_ordered integer, qty_shipped integer, title_id char(6), date_shipped date); Can anyone tell me what the second Join code would be to create this result? My first view works fine, but I don't know how to join it to the second table to achieve this result? I didn't make the tables, I just have to work with what I was given. Thanks in advance!

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  • What ports does Advantage Database Server need?

    - by asherber
    I have an application which uses ADS and I am attempting to deploy it in a Windows network environment with a rather restrictive firewall. I am having a problem configuring firewall ports appropriately. ADS lives on \server, and it's listening on port 1234. When \client tries to connect to \server\tables, I get Error 6420 (Discovery process failed). When \client tries to connect to \server:1234\tables, I get error 6097, bad IP address specified in the connection path. \server is pingable from \client, and I can telnet to \server:1234. If I try to connect from a client machine inside the firewall, either connection path works fine. It seems there must be something else I need to open in the firewall. Any ideas? Thanks, Aaron.

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  • Load a MySQL innodb database into memory

    - by jack
    I have a MySQL innodb database at 1.9GB, showed by following command. SELECT table_schema "Data Base Name", -> sum( data_length + index_length ) / 1024 / -> 1024 "Data Base Size in MB", -> sum( data_free )/ 1024 / 1024 "Free Space in MB" -> FROM information_schema.TABLES -> GROUP BY table_schema ; +--------------------+----------------------+------------------+ | Data Base Name | Data Base Size in MB | Free Space in MB | +--------------------+----------------------+------------------+ | database_name | 1959.73437500 | 31080.00000000 | My questions are: Does it mean if I set the innodb_buffer_pool_size to 2GB or larger, the whole database can be loaded into memory so much fewer read from disk requests are needed? What does the free space of 31GB mean? If the maximum RAM can be allocated to innodb_buffer_pool_size is 1GB, is it possible to specify which tables to loaded into memory while keep others always read from disk? Thanks in advance.

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  • How to implement multi relationship in MS SQL?

    - by Ethan
    I’m trying to design a database to use with ASP.net MVC application. Here is the scenario: There are three entities and users can post their comments for each of these different entities. I just wonder how just put one table for Comments and link all other entities to it. Obviously, Comments table needs 3 references (foreign key) to those tables but as you know these foreign keys can’t be null and just one of them can be filled for each row. Is there any better way than implementing three different tables for each entity’s comments? Cheers Ethan

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  • Trac & Sqlite PK problem

    - by fampinheiro
    I create my trac enviromnets using a sqlite database, it works very well. Now i want to get some information directly from the database and i'm using C# to do it using System.Data.SQLite. The problem i have is an error in the designer cause the tables don't have primary keys. After get this error i went and noticed that all tables that have more than one primary key defined in the schema were not 'converted' to sqlite, that information is lost. I believe the problem is in sqlite_backend.py but python isn't my speciality and i'm in a hurry so if you can guide me to a quick fix. thank you.

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  • SaaS Architecture Question from Newbie

    - by user226767
    I have developed a number of departmental client-server applications, and am now ready to begin working on moving one of these applications to a SaaS model. I have done some basic web development, but I'm a newbie when it comes to SaaS architectures. One of the first questions that comes to mind as I try to design the architecture is the question of single vs. multi tenancy. The pros and cons of each vary significantly depending on the type of application and scale required, so I'd like to describe my application and scale needs below, and hope others can comment on how I should get started with the architecture. The client-server application currently consists of a Firebird database and a Windows application. The database contains about 20 tables containing a few thousand records in 4 primary tables, and a few hundred records in various lookup and related tables. Although the number of records is small, the size can get large, as the database can contain large BLOBS. Each customer sets up their own database and has a handful of users within the organization connected to it. When I update the db schema, a new windows application is released, and it checks the db schema and then applies the updates as needed. For the SaaS application, I am designing for 100's (not 1000's or millions) of new customers per year. My first thought was to go with a multi tenancy model to make updates easy (shut down apply the updates to one database, and then start up). On the other hand, a single tenancy model would provide a means to roll updates out to a group of customers at a time, and spread the risk of data corruption - i.e. if something goes wrong with a database, it will impact one customer instead of all customers. With this idea, I was thinking of having a single web front-end which would connect to a single customer database upon login. Thus, when a new customer creates an account, a new database would be created (each customer would have their own db with multiple users as needed for the customer). In this model, a db update would require either a process to go through each db to apply schema changes, or a trigger upon logging in to initiate a schema update similar to the client-server model currently in use. Can anyone point me to information for similar applications which have been ported from client-server to SaaS? Or provide any pointers to consider? Basically I'm looking for architecture examples of taking a departmental application and making it available as a self service website for multiple customers. Thanks for any suggestions, resources, etc.

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  • How should I model the database for this problem? And which ORM can handle it?

    - by Kristof Claes
    I need to build some sort of a custom CMS for a client of ours. These are some of the functional requirements: Must be able to manage the list of Pages in the site Each Page can contain a number of ColumnGroups A ColumnGroup is nothing more than a list of Columns in a certain ColumnGroupLayout. For example: "one column taking up the entire width of the page", "two columns each taking up half of the width", ... Each Column can contain a number ContentBlocks Examples of a ContentBlock are: TextBlock, NewsBlock, PictureBlock, ... ContentBlocks can be given a certain sorting within a Column A ContentBlock can be put in different Columns so that content can be reused without having to be duplicated. My first quick draft of how this could look like in C# code (we're using ASP.NET 4.0 to develop the CMS) can be found at the bottom of my question. One of the technical requirements is that it must be as easy as possible to add new types of ContentBlocks to the CMS. So I would like model everything as flexible as possible. Unfortunately, I'm already stuck at trying to figure out how the database should look like. One of the problems I'm having has to do with sorting different types of ContentBlocks in a Column. I guess each type of ContentBlock (like TextBlock, NewsBlock, PictureBlock, ...) should have it's own table in the database because each has it's own different fields. A TextBlock might only have a field called Text whereas a NewsBlock might have fields for the Text, the Summary, the PublicationDate, ... Since one Column can have ContentBlocks located in different tables, I guess I'll have to create a many-to-many association for each type of ContentBlock. For example: ColumnTextBlocks, ColumnNewsBlocks and ColumnPictureBlocks. The problem I have with this setup is the sorting of the different ContentBlocks in a column. This could be something like this: TextBlock NewsBlock TextBlock TextBlock PictureBlock Where do I store the sorting number? If I store them in the associaton tables, I'll have to update a lot of tables when changing the sorting order of ContentBlocks in a Column. Is this a good approach to the problem? Basically, my question is: What is the best way to model this keeping in mind that it should be easy to add new types of ContentBlocks? My next question is: What ORM can deal with that kind of modeling? To be honest, we are ORM-virgins at work. I have been reading a bit about Linq-to-SQL and NHibernate, but we have no experience with them. Because of the IList in the Column class (see code below) I think we can rule out Linq-to-SQL, right? Can NHibernate handle the mapping of data from many different tables to one IList? Also keep in mind that this is just a very small portion of the domain. Other parts are Users belonging to a certain UserGroup having certain Permissions on Pages, ColumnGroups, Columns and ContentBlocks. The code (just a quick first draft): public class Page { public int PageID { get; set; } public string Title { get; set; } public string Description { get; set; } public string Keywords { get; set; } public IList<ColumnGroup> ColumnGroups { get; set; } } public class ColumnGroup { public enum ColumnGroupLayout { OneColumn, HalfHalf, NarrowWide, WideNarrow } public int ColumnGroupID { get; set; } public ColumnGroupLayout Layout { get; set; } public IList<Column> Columns { get; set; } } public class Column { public int ColumnID { get; set; } public IList<IContentBlock> ContentBlocks { get; set; } } public interface IContentBlock { string GetSummary(); } public class TextBlock : IContentBlock { public string GetSummary() { return "I am a piece of text."; } } public class NewsBlock : IContentBlock { public string GetSummary() { return "I am a news item."; } }

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  • possible to create sql query with table wildcards?

    - by Rees
    this is probably a simple question, but i have been unable to find a solution online, any help would be much appreciated. I'm trying to create an SQL query in PHP and would like to somehow apply a wild card to the TABLE filter... something perhaps like.... select * from %table%. However, I have only so far been able to see filters for column values not table names. as an example i would have tables such as: jan_table_1 feb_table_1 jan_table_2 feb_table_2 and would want to say, select only tables with a "jan" prefix... or "1" suffix. Is there a quick and easy solution to this that I have not seen? Thanks in advance!

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  • Do MyISAM holes get filled in automatically?

    - by NNN
    When you run a delete on a MyISAM table, it leaves a hole in the table until the table is optimized. This affects concurrent inserts. On the default setting, concurrent_inserts only work for tables without holes. However, in the documentation for MyISAM, under the concurrent_insert section it says: Enables concurrent inserts for all MyISAM tables, even those that have holes. For a table with a hole, new rows are inserted at the end of the table if it is in use by another thread. Otherwise, MySQL acquires a normal write lock and inserts the row into the hole. http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html#sysvar_concurrent_insert Does that mean MyISAM automatically fills in holes whenever a new row is insert into the table? Previously I thought the holes would not be fixed until you OPTIMIZE a table.

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  • Need Help on entity framework

    - by Sarathi1904
    I have 3 tables(Roles,Actions and RoleActionLinks). Roles table has few columns(RoleID,RoleName,Desc). Actions table has few colums(ActionID,ActionName,Desc). In RoleActionLink is created for store the association between Roles and Actions and this table has the columns such as RoleID,ActionID When I created the data model(edmx). it shows only Role and Action as entity. i did not find RoleActionLink table. but even there is no direct relation between Roles and Actions table, both tables are automatically related using RoleActionLink table. When i create the new Action, a action record should be populated in Action table(this is works fine). At the same time, i need to populate record in RoleActionLinks table. But i dont have the entity to populate. Please tell me how to accomplish my needs.

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  • SQL Server 2005 RIGHT OUTER JOIN not working

    - by CheeseConQueso
    I'm looking up access logs for specific courses. I need to show all the courses even if they don't exist in the logs table. Hence the outer join.... but after trying (presumably) all of the variations of LEFT OUTER, RIGHT OUTER, INNER and placement of the tables within the SQL code, I couldn't get my result. Here's what I am running: SELECT (a.first_name+' '+a.last_name) instructor, c.course_id, COUNT(l.access_date) course_logins, a.logins system_logins, MAX(l.access_date) last_course_login, a.last_login last_system_login FROM lsn_logs l RIGHT OUTER JOIN courses c ON l.course_id = c.course_id, accounts a WHERE l.object_id = 'LOGIN' AND c.course_type = 'COURSE' AND c.course_id NOT LIKE '%TEST%' AND a.account_rights > 2 AND l.user_id = a.username AND ((a.first_name+' '+a.last_name) = c.instructor) GROUP BY c.course_id, a.first_name, a.last_name, a.last_login, a.logins, c.instructor ORDER BY a.last_name, a.first_name, c.course_id, course_logins DESC Is it something in the WHERE clause that's preventing me from getting course_id's that don't exist in lsn_logs? Is it the way I'm joining the tables? Again, in short, I want all course_id's regardless of their existence in lsn_logs.

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  • Problem with autocommit in ANT SQL task

    - by Alex Stamper
    I have an SQL script and want to apply it witn ANT task. This script clears out schema, creates new tables and views. The ANT defined task as follows: <sql driver="com.mysql.jdbc.Driver" url="jdbc:mysql://host:3306/smth" userid="smth" password="smth" expandProperties="false" autocommit="true" src="all.sql" > </sql> When this task launches, it shows in log that tables are cleared and created. But when it tries to create first view, it fails with: Failed to execute: CREATE VIEW component... AS SELECT component_raw.id AS MySQLSyntaxErrorException: Table 'component_raw' doesn't exist I have no idea why it fails here. Running this all.sql from MySQL query browser gives no errors. When I launched ANT with -v option, I didn't see any "COMMIT" messages.. Please, help to resolve the problem.

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  • Free Online tools for testing mysql queries - having features like PhPMyAdmin

    - by Sandeepan Nath
    Can anybody tell me any "free online hosted database servers" (don't know if that is the correct term) where we can do query testing and all those things that we can do on tools like PhpMyAdmin? does something like that exist? Like we have http://jsfiddle.net/ for testing js codes. I checked http://sqlzoo.net/ but this is very much limited and there are some predefined tables in some given examples on which we can alter things. That's all. It does not allow me to do a lots of other things like creating tables etc. A nice resource - PhpMyAdmin's demo site . Use the latest stable version here. You have full control over the MySQL server, however you should not change root, debian-sys-maint or pma user password or limit their permissions. If you do so, demo can not be accessed until privileges are restored, so you just break things for you and other users.

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  • Help with complex sql query

    - by eugeneK
    To make story short, i'm building self-learning banner management system. Users will be able to insert these banners to their site when banners will be shown based on sales/impressions ratio. I have 4 tables Banners bannerID int bannerImage varchar.... SmartBanners smartBannerID int smartBannerArrayID int bannerID int impressionsCount int visibility tinyint (percents) SmartBannerArrays smartBannerArrayID int userID int Statistics bannerID int saleAmountPerDay decimal... Each night i need to generate new "visibility" for each SmartBanner based on whole SmartBannerArray that same user has. So i need to get sum of impressions and sales for each bannerID in SmartBannerArray. All comes to my mind is to use double cursor, one will loop thought SmartBannerArrays get needed values for sum of impressions and sales and then inner loop which will access each SmartBanner and change it's "visibility" percentage based on (sales/impressions)/(sumOfSales/sumOfImpressions)*100 Hope you get the picture... Is there any other way to design better tables or not to use double cursor to avoid server overload ?

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  • unit test service layer - NUnit, NHibernate

    - by csetzkorn
    Hi, I would like to unit test a DEPENDENT service layer which allows me to perform CRUD operation without mocking using NUnit. I know this is probably bad practice but I want to give it a try anyway - even if the tests have to run over night. My data is persisted using NHibernate and I have implemented a little library that 'bootstraps' the database which I could use in a [Setup] method. I am just wondering if someone has done something similar and what the fastest method for bootstrapping the database is. I am using something like this: var cfg = new Configuration(); cfg.Configure(); cfg.AddAssembly("Bla"); new SchemaExport(cfg).Execute(false, true, false); to establish the db schema. After that I populate some lookup tables from some Excel tables. Any feedback would be very much appreciated. Thanks. Christian

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  • ActiveRecord fundamentally incompatible with composite keys?

    - by stimms
    I have been attempting to use subsonic for a project on which I'm working. All was going quite well until I encountered a link table with a composite primary key. That is a key made up of the primary keys of the two tables it joins. Subsonic failed to recognize both keys which was problematic. I was going to adjust subsonic to support compound keys but I stopped and though "Maybe there is a reason for this". Normally active record relies on a single primary key field for every record, even in link tables. But is this necessary? Should I just give up on active record for this project or continue with my modifications?

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  • ASP.NET MVC- Bizarre problem - suddennly lost all LINQTO SQL data context objects

    - by MikeD
    I was making an edit to a long existing project. Specifically I added some fields to a table and had to delete the table from the LINQTOSQL designer and re-add it. doesn't Also had to do the same for a view. Mode some other code changes and went to build . Now my project won't build because it can't resolve any of the data context objects (all tables and views) in my code. I don't know what I did or how this happeened. I have many tables and views in the project's L2S data context so I don't wont to try and do over. Please any suggestions on how to resolve this problem are greatly appreciated. Desparate! The error messages I am getting are the familiar The type or namespace name 'equipment' could not be found (are you missing a using directive or an assembly reference?)

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  • OleDbException in my update method

    - by Hamed Norouzi
    Why do I have this error? The error message is: Syntax error in INSERT INTO statement. I want to add a record to my database, but it isn't working. Where is the problem? The code is: using (OleDbConnection connection = new OleDbConnection(connectionString)) { OleDbDataAdapter DbDataAdabter = new OleDbDataAdapter(); DbDataAdabter.SelectCommand = new OleDbCommand("SELECT * FROM [Phone-Book]", connection); OleDbCommandBuilder cb = new OleDbCommandBuilder(DbDataAdabter); connection.Open(); DataRow dataRow = myDataset.Tables["salam"].NewRow(); dataRow[1] = textBox2.Text; dataRow[2] = textBox3.Text; dataRow[3] = textBox4.Text; dataRow[4] = textBox5.Text; dataRow.EndEdit(); myDataset.Tables["salam"].Rows.Add(dataRow); DbDataAdabter.Update(myDataset , "salam"); connection.Close(); connection.Dispose(); } }

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