DataTable.TryGetColumn Method

Overview

Attempts to get column metadata by name without throwing. This method is useful for dynamic rendering scenarios (metadata-driven UI, schema drift handling) where a column may be optional.

Namespace and Assembly

Namespace: PocoDataSet.Data
Assembly: PocoDataSet.Data.dll

Declaration

/// <summary>
/// Attempts to get column metadata by name.
/// IDataTable interface implementation
/// </summary>
/// <param name="columnName">Column name.</param>
/// <param name="columnMetadata">When this method returns true, contains the column metadata.</param>
/// <returns>True if the column exists; otherwise false.</returns>
public bool TryGetColumn(string columnName, out IColumnMetadata? columnMetadata)

Usage Example

// 1. Create a data set
IDataSet dataSet = DataSetFactory.CreateDataSet();

// 2. Add Employee data table to data set
IDataTable employeeDataTable = dataSet.AddNewTable("Employee");
employeeTable.AddColumn("Id", DataTypeNames.INT32);
employeeTable.AddColumn("FirstName", DataTypeNames.STRING);
employeeTable.AddColumn("LastName", DataTypeNames.STRING);

// 3. Try get DepartmentId column, which is an optional column that may not be present in all versions of the data set
if (employeeDataTable.TryGetColumn("DepartmentId", out IColumnMetadata? departmentIdColumn))
{
    // Use DepartmentId column metadata
    string dataType = departmentIdColumn.DataType;
}

 

Table of Content POCO DataSet API References POCO DataSet Types DataTable Members

 

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Business Process Programming in .Net
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