private void btnDel_Click(object sender, EventArgs e)
{
//数据表为空时不执行本操作
if (bds.Current == null)
{
return;
}
Datasets.DSjckja.toptionlbRow r = (Datasets.DSjckja.toptionlbRow)(((DataRowView)bds.Current).Row);
string cmd = "SELECT * FROM toptionxm WHERE lbdm =" + ClsQ.Q1(r.dm);
if (ClsMSSQL.Exists(cmd, ClsDBCon.ConStrKj))
{
ClsMsgBox.Jg("该类别下存在项目无法删除");
return;
}
ClsMsgBox.YesNo("确定要删除该记录吗？", deleting);
}
private void dgv_SelectionChanged(object sender, EventArgs e)
{
if (bds.Current == null)
{
lbRow = null;
return;
}
lbRow = (Datasets.DSjckja.toptionlbRow)(((DataRowView)bds.Current).Row);
//自上一次调用 AcceptChanges 之后，该行未更改。
//该句的作用是防止在toptionlb中增加或删除记录时,
//执行到里面的r.dm和r.mc的赋值语句时因r对应的东西为null，而报错
if (lbRow.RowState == DataRowState.Unchanged)
{
toptionxmTableAdapter1.FillByLbdm(dSjckja1.toptionxm, lbRow.dm);
}
else
{
//此句是清空toptionxm表中此前装入的对应其他选项类别的选项项目
dSjckja1.toptionxm.Clear();
}
}