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Form1.cs
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Form1.cs
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using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Windows.Forms;
using DevExpress.Data;
using DevExpress.Data.Filtering.Helpers;
using DevExpress.XtraGrid;
using DevExpress.XtraGrid.Columns;
using DevExpress.XtraGrid.Views.Base;
using DevExpress.XtraGrid.Views.Grid;
namespace E2442_UnboundDataFromDetail
{
public partial class Form1 : Form
{
GridControl grid = null;
GridView catView = null;
GridView prodView = null;
public Form1()
{
InitializeComponent();
}
DataSet dataSet1 = new DataSet();
private void Form1_Load(object sender, EventArgs e)
{
grid = new GridControl();
grid.Parent = this;
grid.Dock = DockStyle.Fill;
grid.ForceInitialize();
var categories = DataHelper.CreateCategoriesTable();
categories.TableName = "Categories";
dataSet1.Tables.Add(categories);
dataSet1.Tables.Add(DataHelper.CreateProductsTable());
DataColumn keyColumn = dataSet1.Tables[0].Columns["CategoryID"];
DataColumn foreignKeyColumn = dataSet1.Tables[1].Columns["CategoryID"];
dataSet1.Relations.Add("CategoriesProducts", keyColumn, foreignKeyColumn);
grid.MainView.Dispose();
catView = new GridView(grid);
prodView = new GridView(grid);
grid.MainView = catView;
grid.LevelTree.Nodes.Add("CategoriesProducts", prodView);
grid.DataSource = dataSet1.Tables[0];
catView.CustomUnboundColumnData += new CustomColumnDataEventHandler(OnUnboundColumnData);
int colIndex = catView.Columns.Add(new GridColumn());
catView.Columns[colIndex].FieldName = "Field";
catView.Columns[colIndex].UnboundType = UnboundColumnType.Decimal;
catView.Columns[colIndex].Caption = "Detail price sum";
catView.Columns[colIndex].Visible = true;
}
private void OnUnboundColumnData(object sender, CustomColumnDataEventArgs e)
{
if ( !e.IsGetData )
return;
PropertyDescriptorCollection pdc = ((ITypedList)dataSet1.Tables[1].DefaultView).GetItemProperties(null);
ExpressionEvaluator evaluator = new ExpressionEvaluator(pdc, prodView.ActiveFilterCriteria);
int controllerRow = catView.DataController.GetControllerRow(e.ListSourceRowIndex);
if ( !catView.DataController.IsValidControllerRowHandle(controllerRow) )
return;
IList detailList = catView.DataController.GetDetailList(controllerRow, 0);
if ( detailList.Count == 0 )
return;
decimal sum = 0;
for ( int i = 0; i < detailList.Count; i++ )
if ( evaluator.Fit((DataRowView)detailList[i]) )
sum += Convert.ToDecimal(((DataRowView)detailList[i])["UnitPrice"]);
e.Value = sum;
}
}
}