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POEntityCommandExecutionException when returning a PagedList
 

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    <p><strong>Edit: I've solved the original problem, but it gives rise to another question</strong></p> <p>The problem was with this line</p> <pre><code>&amp;&amp; (logLevel == "All" || logLevel == "Error") </code></pre> <p>The LINQ query in 'list' generated the following SQL</p> <pre><code>SELECT 0 AS [C1], N'guid' AS [C2], [Extent1].[ErrorId] AS [ErrorId], [Extent1].[TimeUtc] AS [TimeUtc] FROM [ELMAH_Error] AS [Extent1] WHERE ([Extent1].[TimeUtc] &gt;= @p__linq__0) AND ([Extent1].[TimeUtc] &lt;= @p__linq__1) AND ((N'All' = @p__linq__2) OR (N'Error' = @p__linq__3)) </code></pre> <p>The error I was getting (Inner exception = "p_linq_2 : String truncation: max=3, len=5, value='Error'.") was caused by this part of the SQL</p> <pre><code>(N'All' = @p__linq__2) </code></pre> <p>When I removed logLevel == "All" from the LINQ query, the error disappeared.</p> <p><strong>So, my question now is - why is LINQ/SQL attempting to truncate p_linq__2? It is performing a comparison... why did it need to truncate?</strong></p> <hr> <p><strong>Original Question</strong></p> <p>I'm integrating Elmah and Log4Net with my existing MVC application (following this guide - <a href="http://www.codeproject.com/Articles/104112/Log-Reporting-Dashboard-for-ASP-NET-MVC" rel="nofollow">http://www.codeproject.com/Articles/104112/Log-Reporting-Dashboard-for-ASP-NET-MVC</a>). I'm using SQL CE 4. Handled and unhandled errors ARE being logged to the database, the issue I am having is with the UI to view the errors </p> <p>I am getting an EntityCommandExecutionException triggered by this line (full method listing below)</p> <pre><code>return new PagedList&lt;LogEvent&gt;(list, pageIndex, pageSize); </code></pre> <ul> <li>Error message = "An error occurred while executing the command definition. See the inner exception for details." </li> <li>Inner exception = "p_<em>linq</em>_2 : String truncation: max=3, len=5, value='Error'."</li> </ul> <p>From what I can see, 'list' is populated OK.. </p> <p>The method where the error originates</p> <pre><code>public IPagedList&lt;LogEvent&gt; GetByDateRangeAndType(int pageIndex, int pageSize, DateTime start, DateTime end, string logProviderName, string logLevel) { IQueryable&lt;LogEvent&gt; list = null; switch (logProviderName) { case "All": foreach (string providerName in logProviders.Keys) { IQueryable&lt;LogEvent&gt; logList = GetProvider(providerName).GetByDateRangeAndType(pageIndex, pageSize, start, end, logLevel); list = (list == null) ? logList : list.Union(logList); } break; default: list = GetProvider(logProviderName).GetByDateRangeAndType(pageIndex, pageSize, start, end, logLevel); break; } list = list.OrderByDescending(d =&gt; d.LogDate); return new PagedList&lt;LogEvent&gt;(list, pageIndex, pageSize); } </code></pre> <p>The method it calls</p> <pre><code>private ILogReportingRepository GetProvider(string logProviderName) { string logSourceType = logProviders[logProviderName]; Type providerType = Type.GetType(logSourceType); ILogReportingRepository provider = Activator.CreateInstance(providerType, _context) as ILogReportingRepository; return provider; } </code></pre> <p>The chained method</p> <pre><code>public IQueryable&lt;LogEvent&gt; GetByDateRangeAndType(int pageIndex, int pageSize, DateTime start, DateTime end, string logLevel) { IQueryable&lt;LogEvent&gt; list = (from a in _context.ELMAH_Error where a.TimeUtc &gt;= start &amp;&amp; a.TimeUtc &lt;= end &amp;&amp; (logLevel == "All" || logLevel == "Error") select new LogEvent { IdType = "guid" , Id = "" , IdAsInteger = 0 , IdAsGuid = a.ErrorId , LoggerProviderName = "Elmah" , LogDate = a.TimeUtc , MachineName = a.Host , Message = a.Message , Type = a.Type , Level = "Error" , Source = a.Source, StackTrace = "" }); return list; } </code></pre> <p>Stack trace</p> <p>[InvalidOperationException: p_<em>linq</em>_2 : String truncation: max=3, len=5, value='Error'.] System.Data.SqlServerCe.SqlCeCommand.FillParameterDataBindings(Boolean verifyValue) +1670 System.Data.SqlServerCe.SqlCeCommand.ExecuteCommand(CommandBehavior behavior, String method, ResultSetOptions options) +397 System.Data.SqlServerCe.SqlCeCommand.ExecuteReader(CommandBehavior behavior) +59 System.Data.SqlServerCe.SqlCeMultiCommand.ExecuteReader(CommandBehavior behavior) +342 System.Data.SqlServerCe.SqlCeMultiCommand.ExecuteDbDataReader(CommandBehavior behavior) +41 System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior) +10 System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) +437</p> <p>[EntityCommandExecutionException: An error occurred while executing the command definition. See the inner exception for details.] System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) +507 System.Data.Objects.Internal.ObjectQueryExecutionPlan.Execute(ObjectContext context, ObjectParameterCollection parameterValues) +675 System.Data.Objects.ObjectQuery<code>1.GetResults(Nullable</code>1 forMergeOption) +102 System.Data.Objects.ObjectQuery<code>1.System.Collections.Generic.IEnumerable&lt;T&gt;.GetEnumerator() +30 System.Linq.Enumerable.Single(IEnumerable</code>1 source) +100 System.Data.Objects.ELinq.ObjectQueryProvider.b__3(IEnumerable<code>1 sequence) +5 System.Data.Objects.ELinq.ObjectQueryProvider.ExecuteSingle(IEnumerable</code>1 query, Expression queryRoot) +25 System.Data.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression) +70 System.Data.Entity.Internal.Linq.DbQueryProvider.Execute(Expression expression) +82 System.Linq.Queryable.Count(IQueryable<code>1 source) +233 MvcPaging.PagedList</code>1..ctor(IQueryable<code>1 source, Int32 index, Int32 pageSize, Nullable</code>1 totalCount) +532 IDSM.Repository.LogReportingFacade.GetByDateRangeAndType(Int32 pageIndex, Int32 pageSize, DateTime start, DateTime end, </p> <hr>
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