/// <summary>
/// Renders the specified log event context item and appends it to the specified <see cref="StringBuilder" />.
/// </summary>
/// <param name="builder">append to this</param>
/// <param name="value">value to be appended</param>
/// <param name="format">format string. If @, then serialize the value with the Default JsonConverter.</param>
/// <param name="formatProvider">provider, for example culture</param>
/// <param name="valueFormatter">NLog string.Format interface</param>
public static void AppendFormattedValue(this StringBuilder builder, object value, string format, IFormatProvider formatProvider, IValueFormatter valueFormatter)
{
string stringValue = value as string;
if (stringValue != null && string.IsNullOrEmpty(format))
{
builder.Append(value); // Avoid automatic quotes
}
else if (format == MessageTemplates.ValueFormatter.FormatAsJson)
{
valueFormatter.FormatValue(value, null, CaptureType.Serialize, formatProvider, builder);
}
else if (value != null)
{
valueFormatter.FormatValue(value, format, CaptureType.Normal, formatProvider, builder);
}
}
protected string GetParameterValue(ParameterValue value, IValueFormatter valueFormatter, State state)
{
//Adjust time zone
if (value.Value is DateTime)
{
value.Value = ((DateTime)value.Value).AdjustToTimeZone(state.Context.TimeZoneInfo);
}
string formattedValue;
try
{
formattedValue = valueFormatter.FormatValue(value, state.Context);
}
catch
{
//The formatter couldn't format the value. Just print the value.
formattedValue = "" + value.Value;
}
return(value.Format(state.Context.StringEncoder, formattedValue));
}
public bool FormatValue(object value, string format, CaptureType captureType, IFormatProvider formatProvider, StringBuilder builder)
{
if (!_isStructured && captureType == NLog.MessageTemplates.CaptureType.Normal)
{
switch (Convert.GetTypeCode(value))
{
case TypeCode.String:
{
builder.Append((string)value);
return(true);
}
case TypeCode.Char:
{
builder.Append((char)value);
return(true);
}
case TypeCode.Empty:
return(true); // null becomes empty string
}
}
return(_originalFormatter.FormatValue(value, format, captureType, formatProvider, builder));
}
