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  • sql to linq translated code

    - by ognjenb
    SQL: SELECT o.Id, o.OrderNumber, o.Date, d.Name AS 'Distributor', d.Notes AS 'DistrNotes', -- distributer c.Name AS 'Custoer', c.Notes AS 'CustmNotes', -- customer t.Name AS 'Transporter', -- transporter o.InvoiceFile, o.Notes, o.AwbFile, o.TrackingFile, o.Status, o.DeliveryNotification, o.ServiceType, o.ValidityDate, o.DeliveryTime, o.Weight, o.CustomerId, o.CustomerOrderNumber, o.CustomerDate, o.Shipment, o.Payment, o.TransporterId, o.TotalPrice, o.Discount, o.AlreadyPaid, o.Delivered, o.Received, o.OrderEnteredBy, CONCAT(e.Name, ' ', e.Surname) AS 'IBEKO Engineer', o.Confirmed FROM `order` o LEFT JOIN person d ON o.`DistributorId` = d.`Id` LEFT JOIN person c ON o.`CustomerId` = c.Id LEFT JOIN Transporter t ON o.`TransporterId` = t.Id LEFT JOIN IbekoEngineer e ON o.OrderEnteredBy = e.Id LINQ: testEntities6 ordersEntities = new testEntities6(); var orders_query = (from o in ordersEntities.order join pd in ordersEntities.person on o.DistributorId equals pd.Id join pc in ordersEntities.person on o.CustomerId equals pc.Id join t in ordersEntities.transporter on o.TransporterId equals t.Id select new OrdersModel { Id = o.Id, OrderNumber = o.OrderNumber, Date = o.Date, Distributor_Name = pdk.Name, Distributor_Notes = pdk.Notes, Customer_Name = pc.Name, Customer_Notes = pc.Notes, Transporter_Name = t.Name, InvoiceFile = o.InvoiceFile, Notes = o.Notes, AwbFile = o.AwbFile, TrackingFile = o.TrackingFile, Status = o.Status, DeliveryNotification = o.DeliveryNotification, ServiceType = o.ServiceType, ValidityDate = o.ValidityDate, DeliveryTime = o.DeliveryTime, Weight = o.Weight, CustomerId = o.CustomerId, CustomerOrderNumber = o.CustomerOrderNumber, CustomerDate = o.CustomerDate, Shipment = o.Shipment, Payment = o.Payment, TransporterId = o.TransporterId, TotalPrice = o.TotalPrice, Discount = o.Discount, AlreadyPaid = o.AlreadyPaid, Delivered = o.Delivered, Received = o.Received, OrderEnteredBy = o.OrderEnteredBy, Confirmed = o.Confirmed }); I translated the above SQL code into linq. SQL code return data from database but LINQ not return data. Why?

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  • Logic for capturing unique characteristics in an object array. C# LINQ [closed]

    - by Shawn H.
    Given the following "response" or array of objects, what would be the most efficient way to get the desired results. There must be an easier way than the exhaustive and tedious way I'm doing it now. A LINQ solution would be fantastic. Situation #1 <things> <thing id="1"> <feature>Tall</feature> </thing> <thing id="2"> <feature>Tall</feature> </thing> <thing id="3"> <feature>Tall</feature> <feature>Wide</feature> </thing> <thing id="4"> <feature>Tall</feature> </thing> </things> Result: Wide Situation #2 <things> <thing id="1"> <feature>Short</feature> </thing> <thing id="2"> <feature>Tall</feature> </thing> <thing id="3"> <feature>Tall</feature> <feature>Wide</feature> </thing> <thing id="4"> <feature>Tall</feature> </thing> </things> Result: Wide, Short, Tall Situation #3 <things> <thing id="1"> <feature>Tall</feature> <feature>Thin</feature> </thing> <thing id="2"> <feature>Tall</feature> </thing> <thing id="3"> <feature>Tall</feature> <feature>Wide</feature> </thing> <thing id="4"> <feature>Tall</feature> </thing> </things> Result: Wide, Thin Thanks.

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  • NHibernate LINQ query throws error "Could not resolve property"

    - by Xorandor
    I'm testing out using LINQ with NHibernate but have run into some problems with resolving string.length. I have the following public class DC_Control { public virtual int ID { get; private set; } public virtual string Name { get; set; } public virtual bool IsEnabled { get; set; } public virtual string Url { get; set; } public virtual string Category { get; set; } public virtual string Description { get; set; } public virtual bool RequireScriptManager { get; set; } public virtual string TriggerQueryString { get; set; } public virtual DateTime? DateAdded { get; set; } public virtual DateTime? DateUpdated { get; set; } } public class DC_ControlMap : ClassMap<DC_Control> { public DC_ControlMap() { Id(x => x.ID); Map(x => x.Name).Length(128); Map(x => x.IsEnabled); Map(x => x.Url); Map(x => x.Category); Map(x => x.Description); Map(x => x.RequireScriptManager); Map(x => x.TriggerQueryString); Map(x => x.DateAdded); Map(x => x.DateUpdated); } } private static ISessionFactory CreateSessionFactory() { return Fluently.Configure() .Database(FluentNHibernate.Cfg.Db.MsSqlConfiguration.MsSql2008) .Mappings(m => m.FluentMappings.AddFromAssembly(Assembly.GetExecutingAssembly())) .ExposeConfiguration(c => c.SetProperty("connection.connection_string", "CONNSTRING")) .ExposeConfiguration(c => c.SetProperty("proxyfactory.factory_class", "NHibernate.ByteCode.Castle.ProxyFactoryFactory,NHibernate.ByteCode.Castle")) .BuildSessionFactory(); } public static void test() { using (ISession session = sessionFactory.OpenSession()) { var sqlQuery = session.CreateSQLQuery("select * from DC_Control where LEN(url) > 80").AddEntity(typeof(DC_Control)).List<DC_Control>(); var linqQuery= session.Linq<DC_Control>().Where(c => c.Url.Length > 80).ToList(); } } In my test method I first try and perform the query using SQL, this works just fine. Then I want to do the same thing in LINQ, and it throws the following error: NHibernate.QueryException: could not resolve property: Url.Length of: DC_Control I've searched alot for this "could not resolve property" error, but I can't quite figure out, what this means. Is this because the LINQ implementation is not complete? If so it's a bit disappointing coming from Linq2Sql where this would just work. I also tried it setting up the mapping with a hbm.xml instead of using FluentNHibernate but it produced teh same error.

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  • C# where does the dbml file come from?

    - by 5YrsLaterDBA
    Learning C# and learing Linq now. have lots of qestions about it. Basically I need a step by step tutorial. I suppose the dbml file is the configuration file of the database. I double click it and VS will open it with kind of design diagram. I can create/delete/modify table here? I can use add new item to add the Linq to SQL Classes to get a dbml file? what's next? generate tables in database? generate sql script? generate cs files? when? how?

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  • Entity Framework, what's so bad and what's so good?

    - by AverageJoe719
    Hi all, I am curious as to what your opinions are in Entity Framework? I have read some things like the first version of it is super horrible because it doesn't handle many to many relationships (though many ORMs don't and I've never seen the issue with just making a linking table). Also is LINQ to Entities the same as Entity Framework? I think it is, but it seems like one term is used or the other. I have used Linq to SQL before, what are the advantages of it compared to that? In terms of coding preference I like to build everything from the ground up so I can fully understand it/be in control of the code I write. So I have heard that Entity Framework is harder and I know LinqToSQL handles a lot of stuff automatically, but specifically what are the differences? I appreciate your responses, Thanks =)

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  • How do I get a right outer join in L2E?

    - by Dan
    I have two tables that I set up through the VS Entity Data Model Diagram tool. I'm trying to do a right outer join and it doesn't return results from the 2nd table. I have set up a 0..1 to MANY relationship from the diagram tool. When I run a Linq-To-Entities query, it still defaults to an INNER JOIN. From my understanding of entities, if I set up the relationship using VS, when I join the tables, it should automagically figure out the join syntax based on the relationship I supply. It doesn't seem to be doing that. I am using EF v1 (not Linq-to-Sql). Query I'm running: from s in SomeTable join t in SomeOtherTable on s.ID equals t.ID select new { s.MyFieldName, t.MyOtherFieldName }

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  • Dynamic query to immediate execute?

    - by Curtis White
    I am using the MSDN Dynamic linq to sql package. It allows using strings for queries. But, the returned type is an IQueryable and not an IQueryable<T>. I do not have the ToList() method. How can I this immediate execute without manually enumerating over the IQueryable? My goal is to databind to the Selecting event on a linqtosql datasource and that throws a datacontext disposed exception. I can set the query as the Datasource on a gridview though. Any help greatly appreciated! Thanks. The dynamic linq to sql is the one from the samples that comes with visual studio.

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  • Linq to LLBLGen query problem

    - by Jeroen Breuer
    Hello, I've got a Stored Procedure and i'm trying to convert it to a Linq to LLBLGen query. The query in Linq to LLBGen works, but when I trace the query which is send to sql server it is far from perfect. This is the Stored Procedure: ALTER PROCEDURE [dbo].[spDIGI_GetAllUmbracoProducts] -- Add the parameters for the stored procedure. @searchText nvarchar(255), @startRowIndex int, @maximumRows int, @sortExpression nvarchar(255) AS BEGIN SET @startRowIndex = @startRowIndex + 1 SET @searchText = '%' + @searchText + '%' -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. SET NOCOUNT ON; -- This is the query which will fetch all the UmbracoProducts. -- This query also supports paging and sorting. WITH UmbracoOverview As ( SELECT ROW_NUMBER() OVER( ORDER BY CASE WHEN @sortExpression = 'productName' THEN umbracoProduct.productName WHEN @sortExpression = 'productCode' THEN umbracoProduct.productCode END ASC, CASE WHEN @sortExpression = 'productName DESC' THEN umbracoProduct.productName WHEN @sortExpression = 'productCode DESC' THEN umbracoProduct.productCode END DESC ) AS row_num, umbracoProduct.umbracoProductId, umbracoProduct.productName, umbracoProduct.productCode FROM umbracoProduct INNER JOIN product ON umbracoProduct.umbracoProductId = product.umbracoProductId WHERE (umbracoProduct.productName LIKE @searchText OR umbracoProduct.productCode LIKE @searchText OR product.code LIKE @searchText OR product.description LIKE @searchText OR product.descriptionLong LIKE @searchText OR product.unitCode LIKE @searchText) ) SELECT UmbracoOverview.UmbracoProductId, UmbracoOverview.productName, UmbracoOverview.productCode FROM UmbracoOverview WHERE (row_num >= @startRowIndex AND row_num < (@startRowIndex + @maximumRows)) -- This query will count all the UmbracoProducts. -- This query is used for paging inside ASP.NET. SELECT COUNT (umbracoProduct.umbracoProductId) AS CountNumber FROM umbracoProduct INNER JOIN product ON umbracoProduct.umbracoProductId = product.umbracoProductId WHERE (umbracoProduct.productName LIKE @searchText OR umbracoProduct.productCode LIKE @searchText OR product.code LIKE @searchText OR product.description LIKE @searchText OR product.descriptionLong LIKE @searchText OR product.unitCode LIKE @searchText) END This is my Linq to LLBLGen query: using System.Linq.Dynamic; var q = ( from up in MetaData.UmbracoProduct join p in MetaData.Product on up.UmbracoProductId equals p.UmbracoProductId where up.ProductCode.Contains(searchText) || up.ProductName.Contains(searchText) || p.Code.Contains(searchText) || p.Description.Contains(searchText) || p.DescriptionLong.Contains(searchText) || p.UnitCode.Contains(searchText) select new UmbracoProductOverview { UmbracoProductId = up.UmbracoProductId, ProductName = up.ProductName, ProductCode = up.ProductCode } ).OrderBy(sortExpression); //Save the count in HttpContext.Current.Items. This value will only be saved during 1 single HTTP request. HttpContext.Current.Items["AllProductsCount"] = q.Count(); //Returns the results paged. return q.Skip(startRowIndex).Take(maximumRows).ToList<UmbracoProductOverview>(); This is my Initial expression to process: value(SD.LLBLGen.Pro.LinqSupportClasses.DataSource`1[Eurofysica.DB.EntityClasses.UmbracoProductEntity]).Join(value(SD.LLBLGen.Pro.LinqSupportClasses.DataSource`1[Eurofysica.DB.EntityClasses.ProductEntity]), up => up.UmbracoProductId, p => p.UmbracoProductId, (up, p) => new <>f__AnonymousType0`2(up = up, p = p)).Where(<>h__TransparentIdentifier0 => (((((<>h__TransparentIdentifier0.up.ProductCode.Contains(value(Eurofysica.BusinessLogic.BLL.Controllers.UmbracoProductController+<>c__DisplayClass1).searchText) || <>h__TransparentIdentifier0.up.ProductName.Contains(value(Eurofysica.BusinessLogic.BLL.Controllers.UmbracoProductController+<>c__DisplayClass1).searchText)) || <>h__TransparentIdentifier0.p.Code.Contains(value(Eurofysica.BusinessLogic.BLL.Controllers.UmbracoProductController+<>c__DisplayClass1).searchText)) || <>h__TransparentIdentifier0.p.Description.Contains(value(Eurofysica.BusinessLogic.BLL.Controllers.UmbracoProductController+<>c__DisplayClass1).searchText)) || <>h__TransparentIdentifier0.p.DescriptionLong.Contains(value(Eurofysica.BusinessLogic.BLL.Controllers.UmbracoProductController+<>c__DisplayClass1).searchText)) || <>h__TransparentIdentifier0.p.UnitCode.Contains(value(Eurofysica.BusinessLogic.BLL.Controllers.UmbracoProductController+<>c__DisplayClass1).searchText))).Select(<>h__TransparentIdentifier0 => new UmbracoProductOverview() {UmbracoProductId = <>h__TransparentIdentifier0.up.UmbracoProductId, ProductName = <>h__TransparentIdentifier0.up.ProductName, ProductCode = <>h__TransparentIdentifier0.up.ProductCode}).OrderBy( => .ProductName).Count() Now this is how the queries look like that are send to sql server: Select query: Query: SELECT [LPA_L2].[umbracoProductId] AS [UmbracoProductId], [LPA_L2].[productName] AS [ProductName], [LPA_L2].[productCode] AS [ProductCode] FROM ( [eurofysica].[dbo].[umbracoProduct] [LPA_L2] INNER JOIN [eurofysica].[dbo].[product] [LPA_L3] ON [LPA_L2].[umbracoProductId] = [LPA_L3].[umbracoProductId]) WHERE ( ( ( ( ( ( ( ( [LPA_L2].[productCode] LIKE @ProductCode1) OR ( [LPA_L2].[productName] LIKE @ProductName2)) OR ( [LPA_L3].[code] LIKE @Code3)) OR ( [LPA_L3].[description] LIKE @Description4)) OR ( [LPA_L3].[descriptionLong] LIKE @DescriptionLong5)) OR ( [LPA_L3].[unitCode] LIKE @UnitCode6)))) Parameter: @ProductCode1 : String. Length: 2. Precision: 0. Scale: 0. Direction: Input. Value: "%%". Parameter: @ProductName2 : String. Length: 2. Precision: 0. Scale: 0. Direction: Input. Value: "%%". Parameter: @Code3 : String. Length: 2. Precision: 0. Scale: 0. Direction: Input. Value: "%%". Parameter: @Description4 : String. Length: 2. Precision: 0. Scale: 0. Direction: Input. Value: "%%". Parameter: @DescriptionLong5 : String. Length: 2. Precision: 0. Scale: 0. Direction: Input. Value: "%%". Parameter: @UnitCode6 : String. Length: 2. Precision: 0. Scale: 0. Direction: Input. Value: "%%". Count query: Query: SELECT TOP 1 COUNT(*) AS [LPAV_] FROM (SELECT [LPA_L2].[umbracoProductId] AS [UmbracoProductId], [LPA_L2].[productName] AS [ProductName], [LPA_L2].[productCode] AS [ProductCode] FROM ( [eurofysica].[dbo].[umbracoProduct] [LPA_L2] INNER JOIN [eurofysica].[dbo].[product] [LPA_L3] ON [LPA_L2].[umbracoProductId] = [LPA_L3].[umbracoProductId]) WHERE ( ( ( ( ( ( ( ( [LPA_L2].[productCode] LIKE @ProductCode1) OR ( [LPA_L2].[productName] LIKE @ProductName2)) OR ( [LPA_L3].[code] LIKE @Code3)) OR ( [LPA_L3].[description] LIKE @Description4)) OR ( [LPA_L3].[descriptionLong] LIKE @DescriptionLong5)) OR ( [LPA_L3].[unitCode] LIKE @UnitCode6))))) [LPA_L1] Parameter: @ProductCode1 : String. Length: 2. Precision: 0. Scale: 0. Direction: Input. Value: "%%". Parameter: @ProductName2 : String. Length: 2. Precision: 0. Scale: 0. Direction: Input. Value: "%%". Parameter: @Code3 : String. Length: 2. Precision: 0. Scale: 0. Direction: Input. Value: "%%". Parameter: @Description4 : String. Length: 2. Precision: 0. Scale: 0. Direction: Input. Value: "%%". Parameter: @DescriptionLong5 : String. Length: 2. Precision: 0. Scale: 0. Direction: Input. Value: "%%". Parameter: @UnitCode6 : String. Length: 2. Precision: 0. Scale: 0. Direction: Input. Value: "%%". As you can see no sorting or paging is done (like in my Stored Procedure). This is probably done inside the code after all the results are fetched. This costs a lot of performance! Does anybody know how I can convert my Stored Procedure to Linq to LLBLGen the proper way?

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  • New Fusion CRM Webinars for Partners dates and subjects announced

    - by Richard Lefebvre
    New Fusion CRM Weekly webinars dates and subjects have been announced! Visit our microsite to find out the sessions to come and mark them in your agenda. The next session will take place Monday April the 2nd at 3pm GMT / 4pm CET and will address the Fusion CRM Sales Planning  In order to check the complete agenda and see login-details, please visit our dedicated microsite. How to join the dedicated microsite: Click on http://isdportal.oracle.com/isd_html/sf.htm Enter your Email Address in the corresponding field Enter fusion_crm in the “Access URL/Page Token” field Agenda: The list of sessions is published and will be regularly updated in the microsite. Duration: Each session lasts up to 60 minutes Webex: The respective webinar link and session ID are published in the microsite Audio:  The audio call details (telephone numbers by country, call number and password) is indicated in the microsite Slides: For your convenience, a pdf copy of each presentation will be stored in the microsite’s document section. We hope that this series of webcasts will be instrumental to your way of Fusion CRM business success!  For further information please contact me at [email protected]

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  • MORE on Oracle CRM and the Apple iPad

    - by divya.malik
      Our announcement last week regarding Oracle CRM’s support of the new Apple iPad  has been very well received. I have been watching with glee, the numbers of our demo video downloads move up every day. We now have an updated video which I hope you have all got to see. Click here for the new video. We also got some good coverage on this announcement and lots of positive tweets. Thank you!. Here are just a couple of stories: Oracle Announces Siebel CRM Support for the iPad-                              TMCnet.com, Madhubanti Rudra #10c Oracle Announces CRM Support For iPad-                                          CMSWire, David Roe Finally, a few of you also had asked for more details on this integration, here is the new white paper.

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  • CRM On Demand Performance Tips - Live Web Session on April 20, 2010

    - by Cheryl
    The CRM On Demand Customer Care specialists have another live Web session coming up - this one is about performance - issues, tips, and considerations. This is a part of their Web series, where they pick topics that they hear a lot of questions or concerns about from customers and run live (and free) 1-hour Web sessions about them. Here are the details for this event: Event Title: CRM On Demand Performance Brandon (Hank) Henrie will present some of the top CRM On Demand performance questions and issues that customers raise and some tips and tricks that you can use to avoid them. He will point out good resources that can help and tips for logging performance-related service requests, when all else fails. Date: April 20, 2010 Time: 10:00 am (UTC-07:00 Arizona) How to join: 1. Dial 1-866-682-4770 to access the conference line. 2. Enter the conference code - 6241996 and press # 3. Follow the instructions to record your name and press # 4. Enter the meeting passcode - 1212 and press # 5. Follow the instructions below to join the web portion of the conference. The Web Conference Go to the Oracle Web Conference site: https://strtc.oracle.com Prior to the event: Click the New User button then run the New User Test. (If you have difficulties installing the web conference software try downloading the conference software from the test status window and installing manually.) To join the event: 1. Enter the conference information In the Join Conference box: Conference ID: 6566623 Your Name 2. Click the Join Conference button. Watch for announcements of future sessions on different topics. And, let us know what you think!

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  • 100% Product Coverage in EBS CRM Communities

    - by Oracle_EBS
    Starting June 1st we are now providing 100% coverage for the entire Oracle CRM product line! To facilitate this growth we have made the following changes: Quoting, Telesales, Mobile Field Service and Lease and Finance Management have all been decommissioned and their content moved to their respective communities. Quoting and Telesales are now covered in the newly renamed Sales, Marketing & Common Apps community. Mobile Field Service is now covered in the Field Service Product Family community which used to be called Depot Repair. Lease and Finance Management is now under Contracts. The CRM Communities are an excellent channel for collaborating on issues that are not highly time sensitive or complex. Check with Oracle experts and Industry Peers as they can provide a clue or a nudge toward an answer or a confirmation on a workaround. Some of the best and brightest will be there to assist you. Check the News & Announcement regions for an updated list of covered products. Here are links to the current CRM communities. Service Install Base Contracts CRMO Field Service Product Family Sales, Marketing & Common Apps Trade Management Sales Compensation

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  • jqgrid with asp.net webmethod and json working with sorting, paging, searching and LINQ

    - by aimlessWonderer
    THIS WORKS! Most topics covering jqgrid and asp.net seem to relate to just receiving JSON, or working in the MVC framework, or utilizing other handlers or web services... but not many dealt with actually passing parameters back to an actual webmethod in the codebehind. Furthermore, scarce are the examples that contain successful implementation the AJAX paging, sorting, or searching along with LINQ to SQL for asp.net jqGrid. Below is a working example that may help others who need help to pass parameters to jqGrid in order to have correct paging, sorting, filtering.. it uses pieces from here and there... ================================================== First, THE JAVASCRIPT <script type="text/javascript"> $(document).ready(function() { var grid = $("#list"); $("#list").jqGrid({ // setup custom parameter names to pass to server prmNames: { search: "isSearch", nd: null, rows: "numRows", page: "page", sort: "sortField", order: "sortOrder" }, // add by default to avoid webmethod parameter conflicts postData: { searchString: '', searchField: '', searchOper: '' }, // setup ajax call to webmethod datatype: function(postdata) { mtype: "GET", $.ajax({ url: 'PageName.aspx/getGridData', type: "POST", contentType: "application/json; charset=utf-8", data: JSON.stringify(postdata), dataType: "json", success: function(data, st) { if (st == "success") { var grid = jQuery("#list")[0]; grid.addJSONData(JSON.parse(data.d)); } }, error: function() { alert("Error with AJAX callback"); } }); }, // this is what jqGrid is looking for in json callback jsonReader: { root: "rows", page: "page", total: "totalpages", records: "totalrecords", cell: "cell", id: "id", //index of the column with the PK in it userdata: "userdata", repeatitems: true }, colNames: ['Id', 'First Name', 'Last Name'], colModel: [ { name: 'id', index: 'id', width: 55, search: false }, { name: 'fname', index: 'fname', width: 200, searchoptions: { sopt: ['eq', 'ne', 'cn']} }, { name: 'lname', index: 'lname', width: 200, searchoptions: { sopt: ['eq', 'ne', 'cn']} } ], rowNum: 10, rowList: [10, 20, 30], pager: jQuery("#pager"), sortname: "fname", sortorder: "asc", viewrecords: true, caption: "Grid Title Here" }).jqGrid('navGrid', '#pager', { edit: false, add: false, del: false }, {}, // default settings for edit {}, // add {}, // delete { closeOnEscape: true, closeAfterSearch: true}, //search {} ) }); </script> ================================================== Second, THE C# WEBMETHOD [WebMethod] public static string getGridData(int? numRows, int? page, string sortField, string sortOrder, bool isSearch, string searchField, string searchString, string searchOper) { string result = null; MyDataContext db = null; try { //--- retrieve the data db = new MyDataContext("my connection string path"); var query = from u in db.TBL_USERs select u; //--- determine if this is a search filter if (isSearch) { searchOper = getOperator(searchOper); // need to associate correct operator to value sent from jqGrid string whereClause = String.Format("{0} {1} {2}", searchField, searchOper, "@" + searchField); //--- associate value to field parameter Dictionary<string, object> param = new Dictionary<string, object>(); param.Add("@" + searchField, searchString); query = query.Where(whereClause, new object[1] { param }); } //--- setup calculations int pageIndex = page ?? 1; //--- current page int pageSize = numRows ?? 10; //--- number of rows to show per page int totalRecords = query.Count(); //--- number of total items from query int totalPages = (int)Math.Ceiling((decimal)totalRecords / (decimal)pageSize); //--- number of pages //--- filter dataset for paging and sorting IQueryable<TBL_USER> orderedRecords = query.OrderBy(sortfield); IEnumerable<TBL_USER> sortedRecords = orderedRecords.ToList(); if (sortorder == "desc") sortedRecords= sortedRecords.Reverse(); sortedRecords= sortedRecords .Skip((pageIndex - 1) * pageSize) //--- page the data .Take(pageSize); //--- format json var jsonData = new { totalpages = totalPages, //--- number of pages page = pageIndex, //--- current page totalrecords = totalRecords, //--- total items rows = ( from row in sortedRecords select new { i = row.USER_ID, cell = new string[] { row.USER_ID.ToString(), row.FNAME.ToString(), row.LNAME } } ).ToArray() }; result = Newtonsoft.Json.JsonConvert.SerializeObject(jsonData); } catch (Exception ex) { Debug.WriteLine(ex); } finally { if (db != null) db.Dispose(); } return result; } ================================================== Third, NECESSITIES In order to have dynamic OrderBy clauses in the LINQ, I had to pull in a class to my AppCode folder called 'Dynamic.cs'. You can retrieve the file from downloading here. You will find the file in the "DynamicQuery" folder. That file will give you the ability to utilized dynamic ORDERBY clause since we don't know what column we're filtering by except on the initial load. To serialize the JSON back from the C-sharp to the JS, I incorporated the James Newton-King JSON.net DLL found here : http://json.codeplex.com/releases/view/37810. After downloading, there is a "Newtonsoft.Json.Compact.dll" which you can add in your Bin folder as a reference Here's my USING's block using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Web.UI.WebControls; using System.Web.Services; using System.Linq.Dynamic; For the Javascript references, I'm using the following scripts in respective order in case that helps some folks: 1) jquery-1.3.2.min.js ... 2) jquery-ui-1.7.2.custom.min.js ... 3) json.min.js ... 4) i18n/grid.locale-en.js ... 5) jquery.jqGrid.min.js For the CSS, I'm using jqGrid's necessities as well as the jQuery UI Theme: 1) jquery_theme/jquery-ui-1.7.2.custom.css ... 2) ui.jqgrid.css The key to getting the parameters from the JS to the WebMethod without having to parse an unserialized string on the backend or having to setup some JS logic to switch methods for different numbers of parameters was this block postData: { searchString: '', searchField: '', searchOper: '' }, Those parameters will still be set correctly when you actually do a search and then reset to empty when you "reset" or want the grid to not do any filtering Hope this helps some others!!!! Please reply if you find major issues or ways of refactoring or doing better that I haven't considered.

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  • Linq to Datarow, Select multiple columns as distinct?

    - by Beta033
    basically i'm trying to reproduce the following mssql query as LINQ SELECT DISTINCT [TABLENAME], [COLUMNNAME] FROM [DATATABLE] the closest i've got is Dim query = (From row As DataRow In ds.Tables("DATATABLE").Rows _ Select row("COLUMNNAME") ,row("TABLENAME").Distinct when i do the above i get the error Range variable name can be inferred only from a simple or qualified name with no arguments. i was sort of expecting it to return a collection that i could then iterate through and perform actions for each entry. maybe a datarow collection? As a complete LINQ newb, i'm not sure what i'm missing. i've tried variations on Select new with { row("COLUMNNAME") ,row("TABLENAME")} and get: Anonymous type member name can be inferred only from a simple or qualified name with no arguments. Also, does anyone know of any good books/resources to get fluent?

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  • SQL Subquery in LINQ for Entity Framework 4.0

    - by Jorin
    I'm new to LINQ and EF, but I've been able to stumble through for the majority of the queries I have, but this one has me completely confused. No matter what I try, it comes up in SQL Profiler as a big mess :-). I have two tables: Users and UsersProjects. The goal of this query is to list all the users who are working on projects with the specified user. Here is the query as I have it written in SQL. It's a subquery, but I don't know of a way to simplify it further, but I'm open to suggestions there as well. SELECT DISTINCT Users.FirstName, Users.LastName FROM Users INNER JOIN UsersProjects ON Users.ID=UsersProjects.UserID WHERE UsersProjects.ProjectID IN (SELECT ProjectID FROM UsersProjects WHERE UserID=@UserID) Anybody able to help?? It seems like a fairly simple subquery in SQL, but in LINQ, I'm baffled. Thanks, Jorin

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  • Linq where clause with multiple conditions and null check

    - by SocialAddict
    I'm trying to check if a date is not null in linq and if it isn't check its a past date. QuestionnaireRepo.FindAll(q => !q.ExpiredDate.HasValue || q.ExpiredDate >DateTime.Now).OrderByDescending(order => order.CreatedDate); I need the second check to only apply if the first is true. I am using a single repository pattern and FindAll accepted a where clause ANy ideas? There are lots of similar questions on here but not that give the answer, I'm very new to Linq as you may of guessed :) Edit: I get the results I require now but it will be checking the conditional on null values in some cases. Is this not a bad thing?

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  • NullReferenceException when calling InsertOnSubmit in Linq to Sql.

    - by Charlie
    I'm trying to insert a new object into my database using LINQ to SQL but get a NullReferenceException when I call InsertOnSubmit() in the code snippet below. I'm passing in a derived class called FileUploadAudit, and all properties on the object are set. public void Save(Audit audit) { try { using (ULNDataClassesDataContext dataContext = this.Connection.GetContext()) { if (audit.AuditID > 0) { throw new RepositoryException(RepositoryExceptionCode.EntityAlreadyExists, string.Format("An audit entry with ID {0} already exists and cannot be updated.", audit.AuditID)); } dataContext.Audits.InsertOnSubmit(audit); dataContext.SubmitChanges(); } } catch (Exception ex) { if (ObjectFactory.GetInstance<IExceptionHandler>().HandleException(ex)) { throw; } } } Here's the stack trace: at System.Data.Linq.Table`1.InsertOnSubmit(TEntity entity) at XXXX.XXXX.Repository.AuditRepository.Save(Audit audit) C:\XXXX\AuditRepository.cs:line 25" I've added to the Audit class like this: public partial class Audit { public Audit(string message, ULNComponent component) : this() { this.Message = message; this.DateTimeRecorded = DateTime.Now; this.SetComponent(component); this.ServerName = Environment.MachineName; } public bool IsError { get; set; } public void SetComponent(ULNComponent component) { this.Component = Enum.GetName(typeof(ULNComponent), component); } } And the derived FileUploadAudit looks like this: public class FileUploadAudit : Audit { public FileUploadAudit(string message, ULNComponent component, Guid fileGuid, string originalFilename, string physicalFilename, HttpPostedFileBase postedFile) : base(message, component) { this.FileGuid = fileGuid; this.OriginalFilename = originalFilename; this.PhysicalFileName = physicalFilename; this.PostedFile = postedFile; this.ValidationErrors = new List<string>(); } public Guid FileGuid { get; set; } public string OriginalFilename { get; set; } public string PhysicalFileName { get; set; } public HttpPostedFileBase PostedFile { get; set; } public IList<string> ValidationErrors { get; set; } } Any ideas what the problem is? The closest question I could find to mine is here but my partial Audit class is calling the parameterless constructor in the generated code, and I still get the problem. UPDATE: This problem only occurs when I pass in the derived FileUploadAudit class, the Audit class works fine. The Audit class is generated as a linq to sql class and there are no Properties mapped to database fields in the derived class.

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  • Connection Pool error LINQ to SQL

    - by Ved
    Guys, In Our project I have used LINQ to SQL for every kind of database interaction. Now from what I know , When I create and use DataContext object : it opens the connection , crates a transaction , perform the query and closes the connection. Every now and then we are getting Connection pool error on our services and Server. " The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached. " Any idea ? Am I completely off here ? Is this related to SQL Server itself ? We are using LINQ , .Net 3.5 and Sql Server 2008 NOTE: NO DATAREADER IS BEING USED ANYWHERE IN SYSTEM. Thanks

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  • Random sort list with LINQ and Entity Framework in vb.net

    - by Sander Versluys
    I've seen many examples in LINQ but i'm not able to reproduce the same result in vb.net. I have following code: Dim context As New MyModel.Entities() Dim rnd As New System.Random() Dim gardens As List(Of Tuin) = (From t In context.Gardens Where _ t.Approved = True And _ Not t.Famous = True _ Order By rnd.Next() _ Select t).ToList() But i receive an error when binding this list to a control. LINQ to Entities does not recognize the method 'Int32 Next()' method, and this method cannot be translated into a store expression. Any suggestion on how to get this to work?

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  • linq to sql -> join

    - by ile
    SQL query: SELECT ArticleCategories.Title AS Category, Articles.Title, Articles.[Content], Articles.Date FROM ArticleCategories INNER JOIN Articles ON ArticleCategories.CategoryID = Articles.CategoryID Object repository: public class ArticleRepository { private DB db = new DB(); // // Query Methods public IQueryable<Article> FindAllArticles() { var result = from category in db.ArticleCategories join article in db.Articles on category.CategoryID equals article.CategoryID select new { CategoryID = category.CategoryID, CategoryTitle = category.Title, ArticleID = article.ArticleID, ArticleTitle = article.Title, ArticleDate = article.Date, ArticleContent = article.Content }; return result; } .... } And finally, I get this error: Error 1 Cannot implicitly convert type 'System.Linq.IQueryable' to 'System.Linq.IQueryable'. An explicit conversion exists (are you missing a cast?) C:\Documents and Settings\ilija\My Documents\Visual Studio 2008\Projects\CMS\CMS\Models\ArticleRepository.cs 29 20 CMS Any idea what did I do wrong? Thanks, Ile

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  • Linq: convert string to int array

    - by Oops
    I have a function (tointarray) to convert a string into an array of ints, but I am not very satisfied with it. it does the job but there must be a more elegant way to do this, perhaps Linq could help here. unfortunately I am not very good in Linq. do you guys know a better way? my function: { string s1 = "1;2;3;4;5;6;7;8;9;10;11;12"; int[] ia = tointarray(s1, ';'); } int[] tointarray(string value, char sep) { string[] sa = value.Split(sep); int[] ia = new int[sa.Length]; for (int i = 0; i < ia.Length; ++i) { int j; string s = sa[i]; if (int.TryParse(s, out j)) { ia[i] = j; } } return ia; }

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  • Linq To Objects Auto Increment Number

    - by Nathan
    This feels like a completely basic question, but, for the life of me, I can't seem to work out an elegant solution. Basically, I am doing a Linq Query creating a new object from the query. In the new object, I want to generate a auto-incremented number to allow me to keep a selection order for later use (named Iter in my example). Here is my current solution that does what I am needing: Dim query2 = From x As DictionaryEntry In MasterCalendarInstance _ Order By x.Key _ Select New With {.CalendarId = x.Key, .Iter = 0} For i = 0 To query2.Count - 1 query2(i).Iter = i Next Is there a way to do this within the context of the linq query (so that I don't have to loop the collection after the query)? Thanks!

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  • Bidirectional Serialization with Linq

    - by Andy
    Anyone know why only undirectional serialization is supported in the Linq designer? Consider the following example: Say we have a Customer who requested an Order containing Products. We set the Serialization Mode in the Linq designer to Unidirectional to enable serialization. When looking at the code for the Order object, the DataMember attribute is added to all its internal properties such as ID,OrderNumber, etc. and also to the EntitySet of Products, but not to Customer. One can get around this by manually adding the DataMember attribute to Customer, but this becomes quite cumbersome when there's loads of entities in the database.

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  • Timeout Expired error Using LINQ

    - by Refracted Paladin
    I am going to sum up my problem first and then offer massive details and what I have already tried. Summary: I have an internal winform app that uses Linq 2 Sql to connect to a local SQL Express database. Each user has there own DB and the DB stay in sync through Merge Replication with a Central DB. All DB's are SQL 2005(sp2or3). We have been using this app for over 5 months now but recently our users are getting a Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. Detailed: The strange part is they get that in two differnt locations(2 differnt LINQ Methods) and only the first time they fire in a given time period(~5mins). One LINQ method is pulling all records that match a FK ID and then Manipulating them to form a Heirarchy View for a TreeView. The second is pulling all records that match a FK ID and dumping them into a DataGridView. The only things I can find in common with the 2 are that the first IS an IEnumerable and the second converts itself from IQueryable - IEnumerable - DataTable... I looked at the query's in Profiler and they 'seemed' normal. They are not very complicated querys. They are only pulling back 10 - 90 records, from one table. Any thoughts, suggestions, hints whatever would be greatly appreciated. I am at my wit's end on this.... public IList<CaseNoteTreeItem> GetTreeViewDataAsList(int personID) { var myContext = MatrixDataContext.Create(); var caseNotesTree = from cn in myContext.tblCaseNotes where cn.PersonID == personID orderby cn.ContactDate descending, cn.InsertDate descending select new CaseNoteTreeItem { CaseNoteID = cn.CaseNoteID, NoteContactDate = Convert.ToDateTime(cn.ContactDate). ToShortDateString(), ParentNoteID = cn.ParentNote, InsertUser = cn.InsertUser, ContactDetailsPreview = cn.ContactDetails.Substring(0, 75) }; return caseNotesTree.ToList<CaseNoteTreeItem>(); } AND THIS ONE public static DataTable GetAllCNotes(int personID) { using (var context = MatrixDataContext.Create()) { var caseNotes = from cn in context.tblCaseNotes where cn.PersonID == personID orderby cn.ContactDate select new { cn.ContactDate, cn.ContactDetails, cn.TimeSpentUnits, cn.IsCaseLog, cn.IsPreEnrollment, cn.PresentAtContact, cn.InsertDate, cn.InsertUser, cn.CaseNoteID, cn.ParentNote }; return caseNotes.ToList().CopyLinqToDataTable(); } }

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  • Linq to SQL, Repository, IList and Persist All

    - by Dr. Zim
    This discusses a repository which returns IList that also uses Linq to SQL as a DAL. Once you do a .ToList(), IQueryable object is gone once you exit the Repository. This means that I need to send the objects back in to the Repo methods .Create(Model model), .Update(Model model), and .Delete(int ID). Assuming that is correct, how do you do the PersistAll()? For example, if you did the following, how would you code that in the repository? Changed a single string property in the object Called .Update(object); Changed a different string property in the object Called .Update(object); Called .PersistAll(), which would update the database with both changed strings. How would you associate the objects in the Repository parameters with the objects in the Linq to Sql data context, especially over multiple calls? I am sure this is a standard thing. Links to examples on the web would be great!

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