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POUnable to pull fields from within LINQ query
 

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  1. POUnable to pull fields from within LINQ query
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    <p>Quick overview:<br /> Visual Basic 2010 WinForm app pulls data from DB2. The app allows users to filter the data.</p> <p>The problem:<br /> I'm doing something wrong with my LINQ query (or object definition), as I'm not able to access fields within the dataset. Pulling data from DB2 is fine, I get that data and store it as an IEnumerable.</p> <p>I plan to run this app as disconnected since its readonly for 95% of the users and it accesses 100,000+ records. Because of this, I have two datasets: 1) 'data' which is the full dataset pulled from DB2 (I don't plan on doing any modifications to it), (2) 'filteredData' which is a subset of data based on user entered filters.</p> <pre><code>Dim data As IEnumerable Dim dataFiltered = From record in data Select record 'Filter data based on version Select case uxCodeVersion.Text Case "10" dataFiltered = From rec in dataFiltered Where rec. ... (other parts of case statement removed) End Select </code></pre> <p>and this is my problem. I'm expecting to see the list of fields within 'rec.' (such as rec.CodeVersion) ;however, I just receive object methods (Equals, GetHashCode, GetType, ReferenceEquals, ToString).</p> <p>What simple thing am I missing?</p> <p>Performance is an issue too, but I figured one problem at a time...</p> <p>Thank you,<br /> Brian. <br /></p> <p>Here is the answer as provided below.</p> <p>When defining data, I need to define it to the generic list DTO. So in my case, that becomes: <br /></p> <pre><code> Dim data As IEnumerable(Of DataAccessLayer.DiagnosisAndDiagnosisIndustryCombinedDTO) </code></pre> <p>Then when accessing the code, its the same as before, though I temporarily took out the dataFiltered field and just used data.</p> <pre><code>dataFiltered = From rec in data Where rec.CodeVersion = uxCodeVersion.Text </code></pre>
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    1. USPHBeagle
    1. USPHBeagle
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      1. VTUpMod
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      1. VTUpMod
    1. COhow are you initializing `data`?
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      1. USAndy
    2. COIt varies by what the user selects from a combo box. The app allows for 4 tables to be read, with an additional 2 options being for a JOIN of those tables. In either case, the DataAccessLayer is creating a List (of T) in which "T" is determined by the table being accessed.
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      1. USPHBeagle
 

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