我的应用程序中有3个表单:frmTrucks,frmEditTruck和frmEditContent。 frmTrucks在网格中显示我的卡车。 我添加了一辆卡车,或从网格中选择一辆卡车在frmEditTruck中进行编辑
public void Edit()
{
using (NestedUnitOfWork nuow = session.BeginNestedUnitOfWork())
{
Truck currentTruck = nuow.GetNestedObject(
xpcTruck[gvTruck.GetDataSourceRowIndex(gvTruck.FocusedRowHandle)])
as Truck;
using (frmEditTruck form = new frmEditTruck(currentTruck))
{
if (form.ShowDialog() == DialogResult.OK)
nuow.CommitChanges();
}
}
}
在frmEditTruck中,卡车属性和两个按钮有一些文本框。 btnSave和btnAddContent。 btnSave保存更改(now.CommitChanges();)。 btnAddContent的点击代码是:
Truck truck;
Session session;
public frmEditTruck(Truck truck)
{
InitializeComponent();
this.truck = truck;
this.session = truck.Session;
}
private void btnAddContent_Click(object sender, EventArgs e)
{
TContent content = new TContent(session);
using (frmEditTContent form = new frmEditTContent(content, truck))
{
if (form.ShowDialog() == DialogResult.OK)
truck.TContents.Add(content);
}
}
它显示了frmEditContent。我可以在卡车上添加内容。问题是当我按AddContent然后取消它。之后,当我按下frmEditTruck上的保存按钮时,它会在我的内容表中添加一个空行。我想解决这个问题。我该怎么解决?我不确定我的问题是否足够清楚。请让我知道
public class Truck : XPObject
{
.
.
.
[Association("Truck-TContents")]
public XPCollection<TContent> TContents { get { return GetCollection<TContent>("TContents"); } }
}
public class TContent : XPObject
{
.
.
.
private Truck truck;
[Association("Truck-TContents")]
public Truck Truck
{
get
{
return truck;
}
set
{
SetPropertyValue("Truck", ref truck, value);
}
}
}
答案 0 :(得分:0)
private void btnAddContent_Click(object sender, EventArgs e)
{
TContent content = new TContent(session);
using (frmEditTContent form = new frmEditTContent(content, truck))
{
if (form.ShowDialog() == DialogResult.OK)
truck.TContents.Add(content);
}
}
我已将代码更改为:
private void btnAddContent_Add(object sender, EventArgs e)
{
TContent content = new TContent(session);
using (frmEditTContent form = new frmEditTContent(content, truck))
{
if (form.ShowDialog() == DialogResult.OK)
{
truck.TContents.Add(content);
}
else
{
if (session.TrackingChanges)
session.RollbackTransaction();
}
}
}
它运作正常。