c# - How do you display the SQL statement of a Linq-To-SQL query? -

-

I am trying to get the date value of a specific date that is the earliest date value. The holder example has already been taken from data reference (without prefetching), now I need to search through IO EntitySet (that has not been received).

I am doing this in a foreach loop, it takes a long time to retrieve the requested values ​​for each holder. The index did not help indexing, so I want to see the SQL statement to customize the database.

This is the code that needs to be translated into SQL: 

  DateTime? EntryDateTime = (Where in Holder.IOs io.IOStatus == "Entry" & amp; amp;; & amp; io.IODateTime.HasValue & amp; io.IODateTime.Value.Date == date.Date Selection io.IODateTime ) .Min ();   
 I can not use  LINQPad because the LINQ statement is directly DataContext, but iOS EntitySet does not quesry.  
  Also, if anyone knows that to rewrite the linq statement to speed up recovery, please let me know I use the LoadOptions as the application to delay the application process Would not want to be.    
  after "text" itemprop = "text"> 
 Hold the query, stop it in the debugger. The UO should be able to see it with the mouse on the query object.  
 I think your problem is minimal, you get into SQL, what you have in LINQ, and this is not what I will do in SQL  
 I have a top 1 order and with Will be GL - .. Which is first converted into LINQ ()

Comments

Post a Comment

Popular posts from this blog

php - PDO bindParam() fatal error -

-
I am trying to learn PDO, now I have written this small code, but it gives me a serious error: < P> Fatal error: Call a member function at a non-object dot () ... $ con = new mysqli ("127.0.0.1", "root", "", "csvdangercheck"); $ Query = $ con- & gt; ("Id,` var1`, `var2`) values ​​(" id,: var1,: var2) ";); $ query- & gt; bypass pattern (': id', $ id); $ query- & gt; BindParam (': var1', $ VAL1); $ Query- & gt; bindParam (': var2', $ val2); $ Query-> Executed (); I Trying to use print_r ($ con-> errorInfo ()) but Fatal error: Undefined method mysqli :: errorInfo ( ) ... can someone tell me what am I missing? Flaffeh said, you have PDO Missing Mysqy, try it: $ con = new PDO ('mysql: host = 127.0.0.1; dbname = csvdangercheck', 'root', '');
Read more

logging - How can I log both the Request.InputStream and Response.OutputStream traffic in my ASP.NET MVC3 Application for specific Actions? -

-
For a specific set of tasks, I need to log in to the incoming request inputstream as well as outgoing response. is. I am using an ActionFilterAttribute for this and overriding the OnActionExecuted and OnResultExecuted methods. So I'm starting with this idea ... Public category ActionLoggerAttribute: ActionFilterArrbit {Public Override Zero On-Offed Execution (ActionActioned Contact Filter Filter) {base.OnActionAxecuted (FilterContext); HttpRequestBase request = filterContext.HttpContext.Request; // TODO: Log the request. InputStream} Public Override Zero OnResultExecuted (ResultExecutedContext FilterContext) {base.OnResultExecuted (filterContext); HTTPRPSPointBase Response = FilterContacts Hpptex response; // TODO: Log on Response.OutputStream}} Ideally I'll hook it up with enterprise library logging because I'm already using it for error logging. Am I reaching the input and output stream at the right time? Can I easily use the Enterprise Library to log i
Read more

java - Why my included JSP file won't get processed correctly? -

-
I am trying to create Java web framework (and learning), and on the basis of 'Code Generator In the process of making the material view of the database in the process of development, I stumbled into a difficulty, which I do not know how to solve it. First of all, I want the following index.jsp : & lt; Body & gt; Use all pages to be created. & Lt;% @ include file = "header.jsp"% & gt; & Lt; Hours / & gt; & Lt;% @ included file = "body.jsp"%> & Lt; Hours / & gt; & Lt;% @ include file = "footer.jsp"% & gt; & Lt; / Body & gt; And, in body.jsp , I should have it like this: & lt; Jsp: include page = "$ {Application_modul}"%> Where application_modul is an attribute defined in its controller: request.setAttribute ("application_modul", "USER_ACCOUNT \\ ' View_user_account.jsp "); This file can be found properly, but the processed JSP does
Read more