[英]C# reflection. Target exception was unhandled
NetworkElementCountersFactory factory=new NetworkElementCountersFactory();
List<NetworkElementCounters> neCountersList= new List<NetworkElementCounters>();
NetworkElementCounters neCounters;
while (reader.Read())
{
i = 4;
neCounters = factory.getInstance(tableName, reader.GetInt32(0), reader.GetDateTime(1), reader.GetDateTime(2), reader.GetInt32(3));
foreach (var v in neCounters.Fields)
{
v.GetType().GetProperty("CounterValue").SetValue(neCounters.GetType(), reader.GetValue(i), null);
i++;
}
neCountersList.Add(neCounters);
}
我在这里收到异常:
v.GetType().GetProperty("CounterValue").SetValue(neCounters.GetType(), reader.GetValue(i), null);
这看起来很错误:
.SetValue(neCounters.GetType(), {whatever}, null);
这意味着您正在尝试在Type
实例上分配它。 您应该在此处传递目标对象;如果它是static
属性,则为null
。 看起来应该是这样的:
.SetValue(neCounters, {whatever}, null);
但是使用起来会更容易:
neCounters.CounterValue = ...
// v.CounterValue = ... // <=== might be this instead - confusing context
如果这里有些复杂,也许可以通过dynamic
:
dynamic obj = neCounters;
// dynamic obj = v; // <=== might be this instead - confusing context
obj.CounterValue = reader.GetValue(i);
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