C# 在扩展 class 中调用字典？

Question

完全按照我的程序重写所有内容：

class DictionaryInitializer
{
    public class DictionarySetup
    {
        public string theDescription { get; set; }
        public string theClass { get; set; }
    }
    public class DictionaryInit
    {
        //IS_Revenues data
        public Dictionary<int, DictionarySetup> accountRevenue = new Dictionary<int, DictionarySetup>()
            {
                { 400000, new DictionarySetup {theDescription="Call", theClass="Revenues"}},
                { 400001, new DictionarySetup {theDescription="Bill", theClass="Revenues"}},
                { 495003, new DictionarySetup {theDescription="Revenue", theClass="Revenues"}}
            };


        public Dictionary<int, DictionarySetup> accountExpenses = new Dictionary<int, DictionarySetup>()
            {
                {790130, new DictionarySetup { theDescription="Currency Hedge", theClass="Other income/expense"}},
                {805520, new DictionarySetup { theDescription="Int Income", theClass="Other income/expense"}}
            };
}

在我的主窗体上：

    DictionaryInit theDictionary;
    btnClick() {

    theDictionary = new DictionaryInit();
    //Some code to loop through a datagridview        
    //Somemore Code
                    foreach (var item in theDictionary.accountRevenue)
                    {
                        int theKey = item.Key;
                        if (theKey == keyCode)
                        {
                            DictionarySetup theValues = item.Value;
                            DGVMain.Rows[rowindex].Cells[3].Value = theValues.theDescription;
                            DGVMain.Rows[rowindex].Cells[11].Value = theValues.theClass;
                            DGVMain.Rows[rowindex].Cells[12].Value = "Sale of Services";
                            Recording(rowindex);
                        }
                    }
    }

当前正在进行的工作：

                    DictionarySetup theValue;
                    if (theDictionary.accountExpenses.TryGetValue(keyCode,out theValue.theDescription) //[5]-> Account Type
                    {
                      //Some code to write dictionary data to the data grid view.

我正在努力使 TryGetValue 和 Contains(value) 字典函数暂时可用。

我目前的报错信息如下：

"a property or indexer may not be passed as an out or ref parameter" 尝试 trygetvalue

最后在尝试我尝试创建的扩展方法时：

 "Inconsistent accessibility, Dictionary<int, DictionaryInitializer.DictionarySetup> is less accessible than the method DictionaryUse<int, DictionaryInitializer.DictionarySetup>"

Answer 1

你必须让你的领域public.....

Dictionary<int, DictionarySetup> accountRevenue

应该是

public Dictionary<int, DictionarySetup> accountRevenue

如果你想从 class..

之外引用它

这部分好像还少了一个变量名；

public void DictionaryUse (int code, int key, Dictionary)

应该是

public void DictionaryUse (int code, int key, Dictionary<int, DictionarySetup> theDictionary)

但我同意其他评论，你似乎在重新发明轮子，只需使用现有的 Dictionary 实用方法

C# 在扩展 class 中调用字典？

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