void FilterColumns(DataRow CustomObj)
{
string filtertable = "(name='dbo." + CustomObj["objectname"].ToString() + "')";
DataTable ComboT = (DataTable)comboCol.DataSource;
string CurrColName = DS.Tables["viewcolumn"].Rows[0]["colname"].ToString();
DataRow [] All = ComboT.Select("field<>''");
foreach (DataRow Col in All)
{
string filterfield = "(column='" + Col["field"].ToString() + "')";
string filter = filtertable + "AND" + filterfield;
string excludeclassified = "(colname<>'" + CurrColName + "')AND" +
"(realtable='" + Col["tablename"].ToString() + "')AND" +
"(realcolumn='" + Col["field"].ToString() + "')";
if (SourceTable.Select(excludeclassified).Length > 0)
{
Col.Delete();
continue;
}
//esclude le chiavi delle tabelle secondarie
if (comboTab.SelectedValue.ToString() != MainTable)
{
if (Col["iskey"].ToString().ToUpper() == "S")
{
Col.Delete();
continue;
}
}
if (AllowedColumns.Select(filter).Length > 0)
{
continue;
}
Col.Delete();
}
DS.columntypes.AcceptChanges();
}