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Default.aspx.cs
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/
Default.aspx.cs
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using System;
using DevExpress.Web.ASPxGridView;
using System.Collections.Generic;
namespace SaveRestoreSelection {
public partial class _Default : System.Web.UI.Page {
#region SelectedRows
string sessionKey = "SelectedRows";
Dictionary<object, List<object>> SelectedRows {
get {
if (Session[sessionKey] == null)
Session[sessionKey] = new Dictionary<object, List<object>>();
return (Dictionary<object, List<object>>)Session[sessionKey];
}
set {
Session[sessionKey] = value;
}
}
#endregion
protected void productsGrid_DataSelect(object sender, EventArgs e) {
Session["CategoryID"] = (sender as ASPxGridView).GetMasterRowKeyValue();
}
protected void productsGrid_DataBound(object sender, EventArgs e) {
ASPxGridView grid = (ASPxGridView)sender;
object masterKey = grid.GetMasterRowKeyValue();
if (SelectedRows.ContainsKey(masterKey)) {
List<object> selectedKeys = SelectedRows[masterKey];
if (selectedKeys != null) {
grid.SelectionChanged -= productsGrid_SelectionChanged;
foreach (var key in selectedKeys)
grid.Selection.SelectRowByKey(key);
grid.SelectionChanged += productsGrid_SelectionChanged;
}
} else
SelectedRows.Add(masterKey, null);
}
protected void productsGrid_SelectionChanged(object sender, EventArgs e) {
ASPxGridView grid = (ASPxGridView)sender;
object masterKey = grid.GetMasterRowKeyValue();
List<object> selectedKeys = grid.GetSelectedFieldValues(new string[] { "ProductID" });
SelectedRows[masterKey] = selectedKeys;
}
}
}