DataTable.Copy Method (System.Data)
In C#, you can use the DataTable.Copy method to create a copy of an existing DataTable. The copied DataTable will have the same structure, including columns and constraints, but it will not contain any data. This can be useful for various purposes, such as creating a backup of the original table, performing data transformations, or filtering data in a separate table. Here's a detailed explanation with examples:
The Copy method creates a shallow copy of the DataTable, which means it copies the structure but not the actual data.
In this example, the copiedTable has the same structure as the originalTable (columns and data types), but it does not contain any data.
Deep Copy with Data
If you want to create a deep copy that includes the data, you can use the DataTable.Clone method to create a new DataTable with the same structure and then manually copy the data.
This code creates a deep copy (deepCopyTable) that includes both the structure and data from the originalTable.
The Copy method also preserves constraints defined on the original DataTable, such as primary keys and unique constraints.
The copied table will have the same constraints as the original table.
Common use cases for copying DataTables include creating backup copies, applying changes or filters to the data in a separate table, or performing parallel operations without affecting the original data.
You can use the DataTable.Copy method to create a shallow copy of an existing DataTable, preserving its structure but not its data. This is useful for tasks such as creating backups, performing data transformations, or working with a copy of the original table without affecting the original data. If you need a deep copy with data, you can use the DataTable.Clone method in combination with ImportRow to create a new DataTable with both the structure and data.