CustomDataTable

A DataTable with a DataRow that implements INotifyDataErrorInfo for async-validation.

Example

In your view-model (or code-behind):

//1. Property to bind your grid ItemsSource to public CustomDataTable Data { get { if (data == null) { data = GenerateData(); } return data; } } // your Data (usually from a DB) private CustomDataTable GenerateData() { CustomDataTable dataTable = new(); dataTable.AddColumn("Name", true); // readonly dataTable.AddColumn("StadiumCapacity", typeof(int)); dataTable.AddColumn("Established", typeof(DateTime)); var row = dataTable.NewCustomRow(); row.SetPropertyValue("Name", "Liverpool"); row.SetPropertyValue("StadiumCapacity", 45362); row.SetPropertyValue("Established", new DateTime(1892, 1, 1)); dataTable.Add(row); // ... additional rows } //2. An async validation example: Cell validation // Hint: Row validation would be similar, but you use some row-event public async Task ValidateEditedCell(CustomDataRow currentRow) { var columnName = "StadiumCapacity"; // Use your available grid events to get the column name, like CellEditEnd (control-dependent) object? cellValue = currentRow[columnName]; // Call your async validation method to validate the 'cellValue' await Task.Delay(2000); // simulation: Validation took 2 sec // The validation method returns 'false'? Add the error to the row: currentRow.AddError(columnName, "error message"); // the grid cell would be red marked, and a tool }

Result