Ejemplo n.º 1
0
 public bool Filter(Row r)
 {
     if ((string)r[Field] != Value)
     {
         return false;
     }
     return true;
 }
Ejemplo n.º 2
0
        public ITable Execute(Database db)
        {
            ITable t = db.Tables[Query.TableName];
            Row nr = new Row(t);
            foreach (Set s in Query.Sets)
            {
                nr[s.Field] = s.Value;
            }

            t.AddRow(nr);
            return null;
        }
Ejemplo n.º 3
0
 // <summary>Retrieve the next row. Uses a seek,
 // assuming the underlying framework will be sensible about it
 // (we should usually already be in position)</summary>
 public Row NextRow()
 {
     _fs.Seek(this.Header.Size + (this._currentRow * this.Header.RowLength),0);
     Row r = new Row(this);
     r.BinRead(this.Columns, this._br);
     this._currentRow++;
     return r;
 }
Ejemplo n.º 4
0
        // <summary>
        // Writes a row to disk
        // </summary>
        public void AddRow(Row r)
        {
            if (r.Table != this)
            {
                throw new InvalidOperationException("Can't add row - doesn't belong to this table");
            }

            _fs.Seek(_fs.Length, 0);
            BinaryWriter bw = new BinaryWriter(_fs);
            r.BinWrite(bw);

            this.Header.RowCount += 1;
            _fs.Seek(0, 0);
            this.Header.BinWrite(bw);

            bw.Flush();
        }
Ejemplo n.º 5
0
 public override bool NextResult()
 {
     if (!this.UnderlyingTable.HasRows)
     {
         return false;
     }
     this.CurrentRow = this.UnderlyingTable.NextRow();
     return true;
 }
Ejemplo n.º 6
0
        // <summary>Generally used for creating new rows out of
        // old ones, particularly when joining rows together</summary>
        public void CopyData(Row old, List<Column> newColumns)
        {
            object[] oldd = this._data;
            this._data = new object[this.Table.Columns.Count];

            oldd.CopyTo(this._data, 0);

            foreach (Column c in newColumns)
            {
                // Check if the column exists on this table,
                // if it does copy the value in
                if (this.Table.Columns.Find(o => o.Name == c.Name) != null &&
                    old.Table.Columns.Find(o => o.Name == c.Name) != null)
                {

                    // find the matching old column
                    this[c.Name] = old[c.Name];
                }

            }
        }