不能从我的字典中获取要传递的值

如何解决不能从我的字典中获取要传递的值

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        Dictionary<string,double> state = new Dictionary<string,double>(50);

        state.Add(\"Alabama\",0.0570);
        state.Add(\"Alaska\",0.1167);
        state.Add(\"Arizona\",0.0592);
        state.Add(\"Arkansas\",0.0835);
        state.Add(\"California\",0.0739);
        state.Add(\"Colorado\",0.0272);
        state.Add(\"Connecticut\",0.06540);
        state.Add(\"Delaware\",0.0825);
        state.Add(\"Florida\",0.0503);
        state.Add(\"Georgia\",0.0562);
        state.Add(\"Hawaii\",0.0985);
        state.Add(\"Idaho\",0.0736);
        state.Add(\"Illinois\",0.0562);
        state.Add(\"Indiana\",0.0648);
        state.Add(\"Iowa\",0.0591);
        state.Add(\"Kansas\",0.0654);
        state.Add(\"Kentucky\",0.0734);
        state.Add(\"Louisiana\",0.0685);
        state.Add(\"Maine\",0.0770);
        state.Add(\"Maryland\",0.0559);
        state.Add(\"Massachusetts\",0.0630);
        state.Add(\"Michigan\",0.0672);
        state.Add(\"Minnesota\",0.0802);
        state.Add(\"Mississippi\",0.0740);
        state.Add(\"Missouri\",0.0517);
        state.Add(\"Montana\",0.0708);
        state.Add(\"Nebraska\",0.0610);
        state.Add(\"Nevada\",0.0612);
        state.Add(\"New Hampshire\",0.0387);
        state.Add(\"New Jersey\",0.0661);
        state.Add(\"New Mexico\",0.0826);
        state.Add(\"New York\",0.0676);
        state.Add(\"North Carolina\",0.0726);
        state.Add(\"North Dakota\",0.0711);
        state.Add(\"Ohio\",0.0609);
        state.Add(\"Oklahoma\",0.0621);
        state.Add(\"Oregon\",0.0576);
        state.Add(\"Pennsylvania\",0.0617);
        state.Add(\"Rhode Island\",0.0640);
        state.Add(\"South Carolina\",0.0619);
        state.Add(\"South Dakota\",0.0423);
        state.Add(\"Tennessee\",0.0539);
        state.Add(\"Texas\",0.0438);
        state.Add(\"Utah\",0.0728);
        state.Add(\"Vermont\",0.1060);
        state.Add(\"Virginia\",0.0563);
        state.Add(\"Washington\",0.0648);
        state.Add(\"West Virginia\",0.0834);
        state.Add(\"Wisconsin\",0.0693);
        state.Add(\"Wyoming\",0.0778);


        string stateKey = textBox1.Text.Trim().ToUpper();

        if (state.ContainsKey(stateKey))
        {
            StateTax = state[stateKey];
        }
        else
        {
            string messageBoxText = \"Missing rate for state \" + stateKey;
            MessageBox.Show(messageBoxText);
            return;
        }

所以这就是我到目前为止所能获得的，我无法获取StateTax来获取我的字典值之一的值。这通常不会花我那么长时间，但我的大脑最近才冻结了思考的时间。最好的写方法是什么？     

解决方法

您是大写字母：

string stateKey = textBox1.Text.Trim().ToUpper();

但是字典键要大写：

\"Wyoming\"

在字典中的任何一个都以大写或小写形式出现，并对输入的值进行相同的处理，或者将输入的文本放在首位（最好是前者） 更新：甚至更好！使用Anthony \或Ed \的不区分大小写字典的想法！     ,您正在按键上呼叫

ToUpper

，但并未将按键全部加大写：

string stateKey = textBox1.Text.Trim().ToUpper();

\"ALABAMA\" != \"Alabama\"

，因此您需要： 在用户输入上呼叫6ѭ或

ToLower()

，并相应输入密钥，或 使用不区分大小写的比较<-更好的选择

Dictionary<K,V>

类将在其构造函数之一中接受

IEqualityComparer<T>

。用它来定义如何比较键值。

var caseInsensitiveDictionary = new Dictionary<string,int>(
    StringComparer.OrdinalIgnoreCase);

StringComparer类实现

IEqualityComparer

接口。     ,您的词典存储了像\“ Abc \”这样的键，但是您尝试使用\“ ABC \”键来检索值。要解决您的特定难题，请指定一个完全忽略大小写的比较器。

var stateTaxTable = new Dictionary<string,decimal>(StringComparer.CurrentCultureIgnoreCase);

另请注意，我建议将该值设为

decimal

。存储要在财务计算中使用的值更合适。您可以使用值的后缀“ 14”将其存储在字典中。例：

stateTaxTable.Add(\"Some State\",0.075M);

如果您将价格乘​​以该值，则也希望价格为

decimal

。同样，这些都是建议，但是养成对财务数据使用适当类型的习惯是很好的。     ,

.ToUpper()

是您的问题。 文本框中的所有内容都将被标准化为大写，但是按键区分大小写。     ,您正在将状态输入转换为大写。您将在词典中找不到该条目。 （1）更改代码以使用大写状态名称，或者（2）删除ToUpper并使用不区分大小写的比较器创建字典。     ,或者你可以使用

String stateKey =
               CultureInfo.CurrentCulture.TextInfo.ToTitleCase(textbox1.Text);