A data column signature is used to identify matching columns in
the context of linked data. It contains certain key properties,
such as the name, data type, and external id of a previously known column.
Inheritance Hierarchy
Spotfire.Dxp.DataDataColumnSignature
Namespace: Spotfire.Dxp.Data
Assembly: Spotfire.Dxp.Data (in Spotfire.Dxp.Data.dll) Version: 25.11.10401.3615 (25.11.10401.3615)
Syntax
C#
[SerializableAttribute] [PersistenceVersionAttribute(6, 0)] [ImmutableAttribute] public sealed class DataColumnSignature : IEquatable<DataColumnSignature>, ISerializable
The DataColumnSignature type exposes the following members.
Constructors
| Name | Description | |
|---|---|---|
 | DataColumnSignature(DataColumnProperties) |
Creates a column signature from a properties collection for a column.
|
| DataColumnSignature(DataRowReaderColumn) | Creates a column signature for a column retrieved from a DataRowReader. |
| DataColumnSignature(IDataColumn) | Creates a column signature for a given column. |
| DataColumnSignature(String, DataType) |
Creates a column signature from the name and data type of column.
|
| DataColumnSignature(DataSourceConnection, DataReader, Int32) | Obsolete. Creates a column signature for a column retrieved from a data source. |
| DataColumnSignature(DataSourceConnection, DataReader, String) | Obsolete. Creates a column signature for a column retrieved from a data source. |
Methods
| Name | Description | |
|---|---|---|
| Equals(Object) |
Determines whether the specified Object is equal to the current Object.
(Overrides ObjectEquals(Object).) |
| Equals(DataColumnSignature) | Compares a signature instance to another for equality. |
 | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| GetHashCode |
Serves as a hash function for a particular type. GetHashCode is suitable for use in hashing algorithms and data structures like a hash table.
(Overrides ObjectGetHashCode.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| ToString |
Returns a String that represents the current Object.
(Overrides ObjectToString.) |
Properties
| Name | Description | |
|---|---|---|
 | ContentType |
The content type of the column.
|
| DataType |
The data type of the column.
|
| ExternalIdentifier |
The external identifier of the column, may be null. The external ID is typically a GUID
that comes from IS.
|
| ExternalName |
The external name of the column, may be null. The external name is the name as it was
originally named in the data source.
|
| Name |
The name of the column, may not be null.
|
Version Information
See Also