protected void WriteTick(StockTick tick)
{
lock (gate)
{
var output = new System.Text.StringBuilder();
Action <string> traceStrategy;
if (tick.Change > 0)
{
output.Append('↑');
output.Append(' ');
traceStrategy = TraceStatus;
}
else if (tick.Change < 0)
{
output.Append('↓');
output.Append(' ');
traceStrategy = TraceWarning;
}
else
{
output.Append('-');
output.Append(' ');
traceStrategy = TraceLine;
}
output.Append(tick);
traceStrategy(output.ToString());
}
}
public StockAlert(IEnumerable <StockTick> prefix, StockTick tick)
{
Contract.Requires(prefix != null);
this.tick = tick;
this.prefixAsString = prefix.Aggregate(
new StringBuilder(),
(builder, t) => builder.Append(t.Value).Append(','),
builder => (builder.Length == 0) ? string.Empty : builder.ToString(0, builder.Length - 1));
}