xtraGrid 本身支持DataSet master/detail的数据直接帮定.可以参看其文档,
当然也可以继承接口:DevExpress.Data.IRelationList 定义自己的数据源.
还有可以动态来帮定detail的数据.- 通过事件触发的方式.
根据今天我的探索,写一点动态帮定经验.
我有两个实体类
1. orderItem 继承了myCollectionBase(来之于CollectionBase)
2. item (明细类)
[DBTableAttr("SalesOrder")]
public class orderItem : myCollectionBase
{
public orderItem()
{
}
public bool FoundFlag
{
get
{
if (this.Count > 0)
return true;
else
return false;
}
}
[DBColumnAttr("ordersn")]
public String OrderSn
{
get { return _orderSn; }
set { _orderSn = value; }
}
[DBColumnAttr("OrderApplyDate")]
public Object OrderApplyDate
{
get { return _orderApplyDate; }
set { _orderApplyDate = value; }
}
[DBColumnAttr("DeliveryLocation")]
public String DeliveryLocation
{
get { return _deliveryLocation; }
set { _deliveryLocation = value; }
}
private String _orderSn ="";
private Object _orderApplyDate;
private String _deliveryLocation ="";
//private bool _foundFlag = false;
class item#region class item
[DBTableAttr("SalesOrder_Detail")]
public class item
{
[DBColumnAttr("OrderItemId")]
public int OrderItemId
{
get { return _orderItemId; }
set { _orderItemId = value; }
}
[DBColumnAttr("OrderSn")]
public String OrderSn
{
get { return _orderSn; }
set { _orderSn = value; }
}
[DBColumnAttr("ProductMaterialCode")]
public String ProductMaterialCode
{
get { return _productMaterialCode; }
set { _productMaterialCode = value; }
}
[DBColumnAttr("ProductName")]
public String ProductName
{
get { return _productName; }
set { _productName = value; }
}
[DBColumnAttr("ProductSpec")]
public String ProductSpec
{
get { return _productSpec; }
set { _productSpec = value; }
}
[DBColumnAttr("Qty")]
public int Qty
{
get { return _qty; }
set { _qty = value; }
}
[DBColumnAttr("SuggestionDeliveryDate")]
public Object SuggestionDeliveryDate
{
get { return _suggestionDeliveryDate; }
set { _suggestionDeliveryDate = value; }
}
[DBColumnAttr("ConfirmDate")]
public Object ConfirmDate
{
get { return _confirmDate; }
set { _confirmDate = value; }
}
[DBColumnAttr("IsConfirm")]
public bool IsConfirm
{
get { return _isConfirm; }
set { _isConfirm = value; }
}
[DBColumnAttr("Confirmer")]
public String Confirmer
{
get { return _confirmer; }
set { _confirmer = value; }
}
private int _orderItemId;
private String _orderSn;
private String _productMaterialCode;
private String _productName;
private String _productSpec;
private int _qty;
private Object _suggestionDeliveryDate;
private Object _confirmDate;
private bool _isConfirm;
private String _confirmer;
}
#endregion
}
master的数据源也是一个myCollection对象 : _orders
//获取并帮定master数据源的代码
try
{
orderItem ot = _orderBiz.GetOrderInfoByOrderSn(ordersn, true);
_orders.Add(ot);
//MessageBox.Show(_orders.Count.ToString());
gridControl1.DataSource = _orders;
gridControl1.RefreshDataSource();
}
catch (Exception ex)
{
MessageBox.Show(String.Format(" 出错: {0}",ex.Message) );
}
detail数据源则是_orders[i] ,它本身也是一个Collection对象.
先用设计器把想显示的数据列设计好
gridControls 都必然有一个MainView,主视图,你可以通过设计器修改主视图,我就设定gridView1为它的主视图(见上图).
接着通过Create a new level 来创建一个新级别,所有的级别都比MainView至少低一个级别.
我把第二级别定义为orderItems而它使用orderDetail视图来实现数据.
MasterRowGetRelationCount 这个事件只要定义e.RelationCount = 2; 就可以了,这样在界面上才可以看到数据前有+号.
这个事件主要是定义gridView1的关联级别是那一个(注意是orderItems,而不是orderDetail)
private void gridView1_MasterRowGetRelationName(object sender, DevExpress.XtraGrid.Views.Grid.MasterRowGetRelationNameEventArgs e)
{
e.RelationName = "orderItems";
}
private void gridView1_MasterRowGetChildList(object sender, DevExpress.XtraGrid.Views.Grid.MasterRowGetChildListEventArgs e)
{
e.ChildList = (Fiberxon.DataAccess.myCollectionBase)_orders[gridView1.GetDataSourceRowIndex(e.RowHandle)];
//为什么不是下面这个?大家考虑一下(提示:排序.)
// e.ChildList = (Fiberxon.DataAccess.myCollectionBase)_orders[e.RowHandle];
}
private void gridView1_MasterRowEmpty(object sender, DevExpress.XtraGrid.Views.Grid.MasterRowEmptyEventArgs e)
{
//没有这个,则+号是虚的,无法点开
e.IsEmpty = false;
}
完成了.运行试试看.
统计功能
选中某一列（ID），SummaryItem属性，->设置SummaryType为：count(记录个数）、sum(总和）、Max(该列最大值）......，->再设置DisPlayFormat格式为：static text{0:format specifier} static text其中format specifier可以分别设置为E1、n0、c2、x8，其中代表格式如下：
c2 : $1,234,00
n0 : 1,234
E1 : 1.2E + 003
VB.NET
DevExpress.XtraGrid.Views.Grid.GridView
Options
---optionsCustomization.AllowFilter 是否全部过滤
|
-optionsSelection
