如何使用来自具有相同键的两个不同词典的值构建一个新词典

Question

假设我们有两个具有以下键值对值的字典：

词典 1 : [ {1,abc} {2,cde} {3,efg} ]
词典 2：[ {1,123} {2,234} {3,345} ]

我想创建一个字典如下：字典 3：[ {abc,123} {cde,234} {efg,345} ]

    fieldValues = new List<List<string>>();
    docFieldKey = new List<List<string>>();
    docFieldValueDict = new Dictionary<string, List<string>>();
    docKeyDict = new Dictionary<string, List<string>>();
    iterateDocKeyDict = new List<string>();
    iterateDocFldValueDict = new List<string>();

    //To read row wise and store key and all values
    for (limit = 0; limit < docNames.Count; limit++)
    {
        for (row = 0; row < excelData.Count; row++)
        {
            if (excelData[row] == docNames[limit])
            {
                for (colLimit = row + 1; colLimit < fieldNames.Count; colLimit++)
                {
                    flag = true;
                    fieldValues.Add(new List<string>());
                    fieldValues[limit].Add(excelData[colLimit]);
                }
                if (flag == true)
                {
                    docFieldValueDict.Add(docNames[limit], fieldValues[limit]);                          
                }
            }
        }

    }

    //To add concatenated key for each docName
    for (limit = 0; limit < docNames.Count; limit++)
    {
        for (colLimit = 0; colLimit < concatKey.Count; colLimit++)
        {
            if (concatKey[colLimit].Contains(docNames[limit]))
            {
                for (col = colLimit; col < fieldNames.Count - 1; col++)
                {
                    flag = true;
                    docFieldKey.Add(new List<string>());
                    docFieldKey[limit].Add(concatKey[col]);
                }
                if (flag == true)
                {
                    docKeyDict.Add(docNames[limit], docFieldKey[limit]);
                }
            }
        }

    }

    //to merge the key and the value from both dictionaries
    for (limit = 0; limit <docKeyDict.Count; limit++)
    {
        var docKeyDictCompare = docKeyDict.ElementAt(limit);
        var docFldValueDictCompare = docFieldValueDict.ElementAt(limit);
        iterateDocKeyDict = docKeyDictCompare.Value;
        iterateDocFldValueDict = docFldValueDictCompare.Value;
        if (docKeyDictCompare.Key == docFldValueDictCompare.Key)
        {
            for (col = 0; col < fieldNames.Count - 1; col++)
            {
                if ((iterateDocKeyDict.ElementAt(col)!=string.Empty) && (iterateDocFldValueDict.ElementAt(col)!=string.Empty))
                {
                    flag = true;
                }
            }

            if (flag == true)
            {
                keyValuePairDict.Add(iterateDocKeyDict.ElementAt(col), iterateDocFldValueDict.ElementAt(col));
            }
        }
    }

我尝试了上面的方法，但在

处出现索引超出范围异常

if ((iterateDocKeyDict.ElementAt(col)!=string.Empty) &&(iterateDocFldValueDict.ElementAt(col)!=string.Empty)) Error msg displayed in Console

Answer 1

只要看看您的示例词典，我就建议这样做：

var dic1 = /* [ {1,abc} {2,cde} {3,efg} ] */;
var dic2 = /* [ {1,123} {2,234} {3,345} ] */;
var dic3 = dic1.ToDictionary(x => x.Value, x => dic2[x.Key]);

但是看着你相当长的代码示例，我不确定它是否足够。

Answer 2

这样试试：

var dictionaryC = dictionaryA.ToDictionary(dicA => dicA.Value, dicA => dictionaryB[dicA.Key]);

如何使用来自具有相同键的两个不同词典的值构建一个新词典

How to build a new dictionary with values from two different dictionaries having same keys

c#

dictionary

indexoutofrangeexception