InMemoryDataProviderWrapper Class

In This Topic

Wraps an IDataProvider instance into an in memory data source. This wrapper extends e.g. file-based dataproviders like JSON (also RestDataProvider or SchemaAwareJsonDataProvider), XML, CSV/XLS etc. with some important features. It enables features like sorting, native aggregations, effective filtering on database level and also relations - but not drilldown, on data sources that wouldn't support these features otherwise.

Object Model

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public NotInheritable Class InMemoryDataProviderWrapper 
   Implements ICanHandleUsedIdentifiers, IDataProvider, combit.Reporting.ISupportsLogger

public sealed class InMemoryDataProviderWrapper : ICanHandleUsedIdentifiers, IDataProvider, combit.Reporting.ISupportsLogger

public ref class InMemoryDataProviderWrapper sealed : public ICanHandleUsedIdentifiers, IDataProvider, combit.Reporting.ISupportsLogger

Remarks

Existsing projects based on the previous file-based dataprovider are not touched and can be re-used usually without any modifications - and vice versa.

Related to hugh files, it is also memory-saving, because of tables are only loaded into memory, if they are used and needed - caching-on-demand.

Example

C#
VB.NET

var provider = new XmlDataProvider(@"c:\temp\text.xml");
using (var LL = new ListLabel())
{
    var wrapper = new InMemoryDataProviderWrapper(provider);
    LL.DataSource = wrapper;
    LL.Design();
}

Dim provider As XmlDataProvider = New XmlDataProvider("c:\temp\text.xml")
Using LL As ListLabel = New ListLabel()

    Dim wrapper As InMemoryDataProviderWrapper = New InMemoryDataProviderWrapper(provider)
    LL.DataSource = wrapper
    LL.Design()

End Using

Inheritance Hierarchy

System.Object
combit.Reporting.DataProviders.InMemoryDataProviderWrapper

Requirements

Platforms: Windows 10 (Version 21H2 - 23H2), Windows 11 (21H2 - 22H2), Windows Server 2016 - 2022
.NET: .NET Framework 4.8, .NET 6, .NET 8, .NET 9

Reference

InMemoryDataProviderWrapper Members
combit.Reporting.DataProviders Namespace

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