TryGetFieldKeyByColumnName Method

Overview

The TryGetFieldKeyByColumnName method attempts to locate the actual field key stored in a data row for a specified column name. It first checks for an exact (case-sensitive) key match, and if not found it scans existing keys using a case-insensitive comparison.

This method is commonly used by other helpers (such as TryGetValue) to support case-insensitive access when the row’s stored key casing differs from the caller’s requested column name.

If observableDataRow is null, the method returns false and sets foundFieldKey to the provided columnName.

Declaration

/// <summary>
/// Tries to get field key by column name
/// </summary>
/// <param name="observableDataRow">Observable data row</param>
/// <param name="columnName">Column name</param>
/// <param name="foundFieldKey">Found field key</param>
/// <returns>True if field key found, otherwise false</returns>
public static bool TryGetFieldKeyByColumnName(this IObservableDataRow? observableDataRow, string columnName, out string foundFieldKey)

Namespace and Assembly

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

Usage Example

Find the actual key in the row, even if the caller uses different casing:

// 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. Call TryGetFieldKeyByColumnName by passing column name in different casing
// Field key "Description" found
bool found = TryGetFieldKeyByColumnName("DESCRIPTION", out string? fieldKey);

 

Table of Content POCO DataSet Observable Data Row Members

 

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Business Process Programming in .Net
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