ContainsRow Method

Overview

Returns true if the observable table currently contains the specified observable row instance. This method is typically used for defensive checks before removing rows or when maintaining UI selection references that may outlive the row in the table (for example after row removal or data refresh).

Declaration

/// <summary>
/// Gets a flag indicating whether the observable table contains the specified row instance
/// </summary>
/// <param name="observableDataRow">Observable data row</param>
/// <returns>True if observable table contains specified row, otherwise false</returns>
public bool ContainsRow(IObservableDataRow observableDataRow)

Namespace and Assembly

Namespace: PocoDataSet.ObservableData
Assembly: PocoDataSet.ObservableData.dll

Usage Example

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

// 2. Create Department observable data table
IObservableDataTable departmentObservableDataTable = observableDataSet.AddNewTable("Department");
departmentObservableDataTable.AddColumn("Id", DataTypeNames.INT32);
departmentObservableDataTable.AddColumn("Name", DataTypeNames.STRING);

// 3. Create Department observable data row
IObservableDataRow departmentObservableDataRow = departmentObservableDataTable.AddNewRow();

// 4. Create Employee observable data table
IObservableDataTable employeeObservableDataTable = observableDataSet.AddNewTable("Employee");
employeeObservableDataTable.AddColumn("Id", DataTypeNames.INT32);
employeeObservableDataTable.AddColumn("Name", DataTypeNames.STRING);

// 5. Create Employee observable data row
IObservableDataRow employeeObservableDataRow = employeeObservableDataTable.AddNewRow();

// 6. Check if Employee observable data table contains Department observable row. The result is false.
bool containsDepartmentRow = employeeObservableDataTable.ContainsRow(departmentObservableDataRow);

// 7. Check if Employee observable data table contains Employee observable row. The result is true.
bool containsEmployeeRow = employeeObservableDataTable.ContainsRow(employeeObservableDataRow);

// 8. Remove Employee observable data row from Employee observable data table
employeeObservableDataTable.RemoveRow(employeeObservableDataRow);

// 9. Check if Employee observable data table contains Employee observable row after row removal. // The result is false because the row was removed from the table.
bool containsEmployeeRowAfterRemoval = employeeObservableDataTable.ContainsRow(employeeObservableDataRow);

 

Table of Content POCO DataSet API References ObservablePOCO DataSet Types ObservableDataTable Members

 

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Business Process Programming in .Net
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