TransformerInfoCollection Class

The TransformerInfoCollection class allows you to programmatically access and modify the transformers section of the webParts section of a configuration file.

TransformerInfo objects, as part of a TransformerInfoCollection, specify custom classes that extend the WebPartTransformer class. These transformer classes act as bridges between connected Web Parts, translating data sent by a connection provider into something that the connection consumer can accept.

The following configuration file excerpt shows how to declaratively specify values for several properties of the TransformerInfoCollection class.

<system.web>
  <webParts>
    <transformers>
      <clear />
      <remove name="RowToKeysTransformer" />
      <add name="RowToFieldTransformer"
        type="System.Web.UI.WebControls.WebParts.RowToFieldTransformer" />
      <add name="RowToFilterTransformer"
        type="System.Web.UI.WebControls.WebParts.RowToFilterTransformer" />
      <add name="RowToParametersTransformer"
        type="System.Web.UI.WebControls.WebParts.RowToParametersTransformer" />
    </transformers>
  </webParts> 
</system.web>

The following code example shows how to use the TransformerInfoCollection class. This code example is part of a larger example provided for the WebPartsSection class.

// Add a Transfomer Info Object to the collection using a constructor.
webPartsSection.Transformers.Add(new TransformerInfo(
	"RowToFilterTransformer",
	"MyCustomTransformers.RowToFilterTransformer"));

// Show all TransformerInfo objects in the collection. 
for (int ti = 0;
	ti < webPartsSection.Personalization.Providers.Count; ti++)
{
	Console.WriteLine("  #{0} Name={1} Type={2}", ti,
		webPartsSection.Transformers[ti].Name,
		webPartsSection.Transformers[ti].Type);
}

// Remove a TransformerInfo object by name.
webPartsSection.Transformers.Remove("RowToFilterTransformer");

// Remove a TransformerInfo object by index.
webPartsSection.Transformers.RemoveAt(0);

// Clear all TransformerInfo objects from the collection.
webPartsSection.Transformers.Clear();

.NET Framework

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

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