C# (CSharp) QueryTable.GetQueryColumnIndexByName Beispiele

Beispiel #1

/// <summary>
/// Read the original query associated with this multitable metatable
/// and substitute in the query along with any criteria, selections
/// for the common fields.
/// </summary>
/// <param name="qt"></param>
/// <param name="q"></param>
/// <param name="resultKeys"></param>

        public override void DoPreSearchTransformation(
            Query originalQuery,
            QueryTable qt,
            Query newQuery)
        {
            MetaTable  mt2;
            UserObject uo;
            int        objectId;

            string name = qt.MetaTable.Name;

            if (Lex.Eq(name, MetaTable.AllDataQueryTable))             // special case transform for QuickSearch all data query
            {
                QueryEngine.TransformSelectAllDataQuery(originalQuery, qt, newQuery);
                return;
            }

            string prefix = "multitable_";             // multitable metatable names begin with "multitable_"

            if (name.ToLower().IndexOf(prefix) != 0)
            {
                return;
            }
            string tok = name.Substring(prefix.Length);             // get the id of the associated query

            try { objectId = Int32.Parse(tok); }
            catch (Exception ex) { return; }

            uo = UserObjectDao.Read(objectId);             // read query
            if (uo == null)
            {
                return;
            }

            Query q2 = Query.Deserialize(uo.Content);

            foreach (QueryTable qt2 in q2.Tables)
            {
                mt2 = qt2.MetaTable;
                if (mt2.Parent == null)
                {
                    continue;                   // ignore root table
                }
                QueryTable qt3 = qt2.Clone();   // make copy to modify & add to query
                qt3.Alias = "";                 // clear alias to avoid possible conflicts with existing aliases

                if (qt.HeaderBackgroundColor != Color.Empty)
                {
                    qt2.HeaderBackgroundColor = qt.HeaderBackgroundColor;
                }

                MetaColumn keyMc = qt3.MetaTable.KeyMetaColumn;                 // clear any key criteria
                if (keyMc != null)
                {
                    QueryColumn qc3 = qt3.GetQueryColumnByName(keyMc.Name);
                    qc3.Criteria = qc3.CriteriaDisplay = "";
                }

                foreach (QueryColumn qc in qt.QueryColumns)
                {                 // pass any criteria, selections from multitable to underlying tables
                    int qci3 = qt3.GetQueryColumnIndexByName(qc.MetaColumn.Name);
                    if (qci3 < 0)
                    {
                        continue;                             // ignore if doesn't match by name
                    }
                    QueryColumn qc3 = qt3.QueryColumns[qci3]; // cloned column
                    if (qc.Criteria != "")
                    {                                         // if criteria then clone model query col for simpler copying of criteria
                        QueryColumn qc4 = qc.Clone();
                        qc4.MetaColumn         = qc3.MetaColumn;
                        qc4.QueryTable         = qt3;
                        qt3.QueryColumns[qci3] = qc4;
                        qc3 = qc4;
                    }

                    qc3.Selected = qc.Selected;

                    continue;
                }

                newQuery.AddQueryTable(qt3);
            }

            return;
        }