我有两个 Janus GridEX。单击特定按钮时,我想将第一个网格的行添加到另一个网格;但我想检查第二个网格中是否已经不存在这些行,所以我将此代码块与 linq 一起使用:
DataTable dtSelectedRows = new DataTable();
dtSelectedRows = firstGrid.GetDataSource().Clone();
foreach (GridEXRow row in rows)
{
DataRow dr = ((DataRowView)row.DataRow).Row;
if (dtSelectedRows.AsEnumerable().Count() > 0)
{
if (dtSelectedRows.AsEnumerable().Where(t => t.Field<Int32>("myColumn") == Convert.ToInt32(dr["myColumn"])).Count() == 0)
{
dtSelectedRows.ImportRow(dr);
}
}
else
dtSelectedRows.ImportRow(dr);
}
}
secondGrid.SetDataSource(dtSelectedRows);
但不幸的是它没有工作,dtSelectedRows 总是空的。所以我被迫将块重写为:
GridEXRow[] rows = firstGrid.GetCheckedRows();
DataTable dtSelectedRows = new DataTable();
dtSelectedRows = firstGrid.GetDataSource().Clone();
foreach (GridEXRow row in rows)
{
if (row.RowType == Janus.Windows.GridEX.RowType.Record)
{
DataRow dr = ((DataRowView)row.DataRow).Row;
bool rowExists = false;
foreach (DataRow r in dtSelectedRows.Rows)
{
if (Convert.ToInt32(r["myColumn"]) == Convert.ToInt32(dr["myColumn"]))
{
rowExists = true;
break;
}
}
if (!rowExists)
dtSelectedRows.ImportRow(dr);}
}
secondGrid.SetDataSource(dtSelectedRows);
幸运的是它刚刚奏效。那么如何更正第一个代码块呢?