ToPoco Method

Overview

The ToPoco method creates a new POCO object of type T and copies values from a data row into the POCO’s public writable properties. The created POCO object is a detached copy: it is not linked to the underlying row, and changes made to the POCO are not reflected in the row.

Property values are matched by name: a POCO property named Name reads from the row field "Name" or "name" or "NAME", etc.. If the field is missing or its value is null, that property is skipped.

Declaration

/// <summary>
/// Creates a new POCO instance from an observable data row by copying row values into writable properties.
/// Matching between property names and row keys is case-insensitive.
/// </summary>
/// <typeparam name="T">POCO type</typeparam>
/// <param name="observableDataRow">Source observable data row</param>
/// <returns>New POCO instance</returns>
public static T ToPoco<T>(this IObservableDataRow? observableDataRow) where T : new()

Namespace and Assembly

Namespace: PocoDataSet.ObservableExtensions
Assembly: PocoDataSet.ObservableExtensions.dll

Usage Example

Let’s assume the following POCO type:

internal class EmploymentType
{
  public int Id { get; set; }
  public string Code { get; set; }
  public string? Description { get; set; }
}

Copy data from a row into a POCO:

// 1. Create observable data set
IObservableDataSet observableDataSet = new ObservableDataSet();

// 2. Create EmploymentType table and add a new row
IObservableDataTable employmentTypeObservableDataTable = observableDataSet.AddNewTable("EmploymentType");
employmentTypeObservableDataTable.AddColumn("Id", DataTypeNames.INT32);
employmentTypeObservableDataTable.AddColumn("Code", DataTypeNames.STRING);
employmentTypeObservableDataTable.AddColumn("Description", DataTypeNames.STRING);

IObservableDataRow employmentTypeObservableDataRow = employmentTypeObservableDataTable.AddNewRow();
employmentTypeObservableDataRow["Id"] = 1;
employmentTypeObservableDataRow["Code"] = "ET01";
employmentTypeObservableDataRow["Description"] = "Full Time";

// 3. Convert row to POCO
EmploymentType employmentTypePoco = employmentTypeObservableDataRow.ToPoco<EmploymentType>();

// 4. Change Code in POCO
employmentTypePoco.Code = "ET03";

// 5. Verify that changes are NOT propagated to data row (expected "ET01")
string? rowCode = employmentTypeObservableDataRow["Code"] as string;

 

Table of Content POCO DataSet Observable Data Row Members

 

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Business Process Programming in .Net
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