public static void Modify1()
{
var id = 10;
Expression <Func <User, bool> > expr = f => f.Id == id || f.Name == "ss";
Expression <Func <User, bool> > other = u => u.Name == "ds";
var expr2 = Expression.Lambda(expr.Body, Expression.Parameter(expr.Parameters[0].Type, "f2"));
var pm = new ParameterUpdate(expr, "f3");
var expr3 = pm.Visit(expr);
var modifier = new MyVisitor();
expr = (Expression <Func <User, bool> >)modifier.Modify(expr, other);
var fn1 = expr.Compile();
}
private async Task <bool> UpdateParameter(EltraDevice device, Parameter parameter)
{
bool result = false;
try
{
var parameterUpdate = new ParameterUpdate
{
ChannelId = Channel.Id,
NodeId = device.NodeId,
Parameter = parameter
};
var path = $"api/parameter/update";
var json = parameterUpdate.ToJson();
var response = await Transporter.Put(_identity, Url, path, json);
if (response != null)
{
if (response.StatusCode == HttpStatusCode.OK)
{
result = true;
}
else
{
MsgLogger.WriteError($"{GetType().Name} - UpdateParameter", $"update parameter '{parameter.UniqueId}' failed, reason = {response.StatusCode}");
}
}
else
{
MsgLogger.WriteError($"{GetType().Name} - UpdateParameter", $"update parameter '{parameter.UniqueId}' failed, reason = no response");
}
}
catch (Exception)
{
result = false;
}
return(result);
}
/// <summary>
/// ToJson
/// </summary>
/// <param name="update"></param>
/// <returns></returns>
public static string ToJson(this ParameterUpdate update)
{
return(JsonSerializer.Serialize(update));
}