C# Dictionary修改遇到的一个错误 out of sync!

来源：互联网发布：淘宝和拼多多哪个货真编辑：程序博客网时间：2024/05/20 05:08

题目中问题是我批量修改字典的数据时遇到的问题，作为小白真是发现好多东西没有接触到啊。

上错误代码

//foreach (KeyValuePair<string,float> item in dataDic)
//{

// for (int i = 0; i < cars.Length; i++)
// {
// if (cars[i].name.Contains(item.Key))
// {
// dataDic[item.Value.ToString()] = cardatas[i].currentScore;
// break;
// }
// }
//}

错误提示

InvalidOperationException: out of sync
System.Collections.Generic.Dictionary`2+Enumerator[System.String,System.Single].VerifyState () (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Collections.Generic/Dictionary.cs:912)
System.Collections.Generic.Dictionary`2+Enumerator[System.String,System.Single].MoveNext () (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Collections.Generic/Dictionary.cs:835)
RaceData.Updatedatas () (at Assets/Scripts/Data/RaceData.cs:164)
RaceData.Update () (at Assets/Scripts/Data/RaceData.cs:80)

网上一顿搜集资料，说是不能用迭代去修改Dictionary，需要先把字典作为一个Buffer引出来，然后修改Buffer

上代码

List<string> buffer = new List<string>(dataDic.Keys);
foreach (string item in buffer)
{
for (int i = 0; i < cars.Length; i++)
{
if (cars[i].name.Contains(item))
{
dataDic[item.ToString()] = cardatas[i].currentScore;
break;
}
}
}

//这样就好使了，当然还有其他方法修改

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