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Question about how to use strong typed dataset in N-tier application for .NET


Question about how to use strong typed dataset in N-tier application for .NET

By : user3861995
Date : November 21 2020, 07:01 PM
I wish this help you I would stay away from datasets if I were you. They are very much a .NET 2.0 solution to the problem, and they weren't a very good solution, either.
I would use Entity Framework as a data layer - they do not have the issues a DataSet has, including the one you're seeing. A DataSet has to live in both worlds - both XML and relational, and they don't always fit. Entity Framework can build you entity models that need only conform to standard programming concepts like inheritance and association.
code :


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Warning C4564 when building C++/CLI project that consumes strong-typed dataset

Warning C4564 when building C++/CLI project that consumes strong-typed dataset


By : user2082761
Date : March 29 2020, 07:55 AM
will be helpful for those in need It is a warning level 4 message, falling in the category "this may byte you in the rear end some day". Support for calling methods with default parameter values without specifying the value is spotty in the .NET languages. VB.NET always had it, C# just acquired it in version 4. C++/CLI does not support it and surely never will. Which is notable because the C++ language does support it. A C++/CLI programmer could well be surprised by this, thus the warning.
There isn't much you can do about the warning, the code for the dataset is auto-generated. It is otherwise utterly benign, if you call the method without supplying a value for the argument with the default value then you'll get a compiler error.
Calculations on Subquery in strong typed dataset

Calculations on Subquery in strong typed dataset


By : user2253324
Date : March 29 2020, 07:55 AM
I wish did fix the issue. It would help a lot if you were more specific and gave an example. I'm not sure what "30 conditions on the same query(the WHERE-clause)" means or what "strongly typed" has to do with anything. Can you give two or three example of the 30 things you want?
A guess at what you want is something like this:
code :
SELECT
  COUNT(CASE WHEN (fiClaimStatus = 1) AND (fiClaimStatus_ChangeTo = 8)
        THEN 1 ELSE NULL END) AS myCount1,
  COUNT(CASE WHEN (fiClaimStatus = 2) AND (fiClaimStatus_ChangeTo = 8)
        THEN 1 ELSE NULL END) AS myCount2,
  COUNT(CASE WHEN (fiClaimStatus = 2) AND (fiClaimStatus_ChangeTo = 6)
        THEN 1 ELSE NULL END) AS myCount1,
  ...
FROM dbo.getRuleConfigBySetSlsRules(@fiSet, @ServiceLocations, @Rules) AS T
Adding rows to Strong Typed Dataset with relation

Adding rows to Strong Typed Dataset with relation


By : ind_tan
Date : March 29 2020, 07:55 AM
it fixes the issue Hello got typed Dataset named DSMain. , The way you are doing it, AddUserRow has the following signature:
code :
AddUserRow(string fName, string lName, CaseRow case) //note case is of type CaseRow, not int.
public static void AddNewDluznik(string fName, string lName, int case)
{
    MainData.User.AddUserRow(fName, lName, MainData.Case.FindByC_id(case));
}
public static void AddNewDluznik(string fName, string lName, int case)
{
     var row = MainData.User.NewUserRow();
     row.U_fname = fName;
     row.U_lname = lName;
     row.U_Case = case; 
     MainData.User.AddUserRow(row);
}
Strong Typed Dataset set variable TOP value

Strong Typed Dataset set variable TOP value


By : user3099363
Date : March 29 2020, 07:55 AM
Does that help I've got a problem with a strong typed dataset query in my project. , You can put it in brackets:
code :
SELECT TOP (@TopValue) * FROM dbo.PositionData WHERE ID_Tracker=@ID_Tracker
SELECT TOP @TopValue * FROM dbo.PositionData WHERE ID_Tracker=@ID_Tracker
ORDER BY 
    CASE WHEN @OrderDirection = 'ASC'  THEN [Time] END ASC, 
    CASE WHEN @OrderDirection = 'DESC' THEN [Time] END DESC
How to insert data into Strong Typed DataSet?

How to insert data into Strong Typed DataSet?


By : Arunanshu Pandey
Date : March 29 2020, 07:55 AM
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