Question

这在早期工作正常，但在我更新了这个开始破坏的newtonsoft版本之后还不确定。

这是我得到的错误：收集被修改;枚举操作可能无法执行。

JObject jObjectFull = (JObject)dynObjFullJArray[index]; 
JArray     jArrayFull = (JArray)jObjectFull[packageName]; 
int fullCount = jObjectFull[packageName].Count();

                    if (packageName == "hello") 
                    {
                        if (ishello)
                        {
                            ishellochck= false;
                            jArrayFull.RemoveAll();
                        }

                        jArrayFull.Add(JObject.FromObject(dynObjItem));
                    }
                    else
                    {
                        foreach (var item in jObjectFull[packageName])
                        {
                            int itemId = (int)item.SelectToken(selectedIdOrderNo.Split('|')[0]);
                            if (dynObjItemId == itemId)
                            {
                                //Edit
                                flag = true;
                                jArrayFull[i].Remove();
                                if (i == 0)
                                {
                                    if (fullCount > 1)
                                        jArrayFull[i].AddBeforeSelf(JObject.FromObject(dynObjItem));
                                    else
                                        jArrayFull.Add(JObject.FromObject(dynObjItem));
                                }
                                else
                                {
                                    if (i == (fullCount - 1))
                                    {
                                        --i;
                                        jArrayFull[i].AddAfterSelf(JObject.FromObject(dynObjItem));
                                    }
                                    else
                                        jArrayFull[i].AddBeforeSelf(JObject.FromObject(dynObjItem));
                                }
                            }
                            i++;
                        }`

Answer 1

您没有说明您使用的是什么版本的Json.NET，但是正确引发了异常，因为您正在修改通过其迭代的集合：< / p>

jObjectFull[packageName]定义为jArrayFull[i].Remove()，
因此，当您执行((JArray)jObjectFull[packageName]).RemoveAt(i)时，您实际上正在执行IList<JToken>，从而修改了集合。

JArray实现了JObject jObjectFull = (JObject)dynObjFullJArray[index]; JArray jArrayFull = (JArray)jObjectFull[packageName]; if (packageName == "hello") { if (ishello) { ishellochck = false; jArrayFull.RemoveAll(); } jArrayFull.Add(JObject.FromObject(dynObjItem)); } else { for (int i = 0, fullCount = jArrayFull.Count; i < fullCount; i++) { int itemId = (int)jArrayFull[i].SelectToken(selectedIdOrderNo.Split('|')[0]); if (dynObjItemId == itemId) { //Edit flag = true; jArrayFull[i] = JObject.FromObject(dynObjItem); // Maybe break here? } } }，所以也许你只想做：

response

收集被修改;枚举操作可能无法执行。修改作业时

1 个答案: