The expression transformation allows adding, replacing, and/or deleting columns.
This is generally done by supplying a column selection to work on, and, in the first two
cases, also providing an expression, name and, optionally, a formatter. The column selection
can be either a fixed set of columns, or a column search expression which will be reevaluated each time
the transformation is executed. Use the column name symbol to refer to the columns
selected in expressions.
Inheritance Hierarchy
Spotfire.Dxp.DataDataTransformation
Spotfire.Dxp.Data.TransformationsExpressionTransformation
Namespace: Spotfire.Dxp.Data.Transformations
Assembly: Spotfire.Dxp.Data (in Spotfire.Dxp.Data.dll) Version: 30.0.11525.4184 (30.0.11525.4184)
Syntax
C#
[SerializableAttribute] [PersistenceVersionAttribute(3, 0)] public sealed class ExpressionTransformation : DataTransformation
The ExpressionTransformation type exposes the following members.
Constructors
Name | Description | |
---|---|---|
ExpressionTransformation |
Creates the transformation.
|
Methods
Name | Description | |
---|---|---|
Connect | Connects to the input reader.
A DataRowReader can then be retrieved from the DataTransformationConnection.
(Inherited from DataTransformation.) | |
GetType | Gets the Type of the current instance. (Inherited from Object.) |
Properties
Name | Description | |
---|---|---|
ColumnAdditions |
Gets the collection of operations that represents added columns.
| |
ColumnNameSymbol |
Use this in expressions and/or names to refer to the columns in a selection that this shall be applied to.
| |
ColumnRemovals |
Gets the collection of operations that represents removed columns.
| |
ColumnReplacements |
Gets the collection of operations that represents replaced columns.
| |
LoadReport | Gets the PartialDataLoadReport that can be used to
report errors during connection.
(Inherited from DataTransformation.) | |
Name | Gets the display name of the transformation.
(Inherited from DataTransformation.) | |
TypeId | Gets the type identifier for the data source.
(Inherited from DataTransformation.) |
Version Information
See Also