我希望将两个CSV文件合并为1个。
A.CSV
WBS Element,Purchasing Document,Purchase order text,Val/COArea Crcy
ABC123,,,75000
ABC124,4200028630,Service,1069.2
ABC124,4200041490,Service,25518.24
ABC124,4200041490,Service,-1890.24
ABC126,4200028630,Service,2268
ABC126,4200028630,Service,-2268
ABC126,4200029435,Service,25149.65
ABC137,,,4146.2
B.CSV
WBS Element,Ref Document Number,Val/COArea Crcy,Name
ABC124,1000060610,0,Slab Locates & Steel Differential
ABC124,1000081223,0,NOCN339A&3921
ABC124,1000081223,0,Slab Locates & Steel Differential
ABC126,1000067757,0,Structural Steel
ABC 137,4200041490,0,Service
ABC 137,4200028630,5393.52,Service
ABC 137,4200029435,0,Service
我想制作一个结合了这两个文件的CSV文件。以WBS元素开头的行连接在一起。然后，如果每个文件中的WBS元素匹配，则将它们放在同一行上。如果A有WBS元素B没有，那么B的部分只是“，”，反之亦然。
示例目标输出：
WBS Element,Purchasing Document,Purchase order text,Val/COArea Crcy,WBS Element,Ref Document Number,Val/COArea Crcy,Name
ABC123,,,75000,,,,
ABC124,4200028630,Service,1069.2,ABC124,1000060610,0,Slab Locates & Steel Differential
我有以下代码：
static void Main(string[] args)
{
StreamReader a = new StreamReader(@"Input\a.csv");
StreamReader b = new StreamReader(@"Input\b.csv");
StreamWriter output = new StreamWriter(@"Output\output.csv");
Dictionary<string, string> Adict = new Dictionary<string, string>();
Dictionary<string, string> Bdict = new Dictionary<string, string>();
output.WriteLine(a.ReadLine() + "," + b.ReadLine());
while (!a.EndOfStream && !b.EndOfStream)
{
//section for A
List<string> atempList = new List<string>();
string atempString;
string Aline = a.ReadLine();
string[] Atokens = Aline.Split(','); //split the line into array
foreach (string s in Atokens)
atempList.Add(s); //add each string in token array to tempList
atempList.Remove(Atokens[0]); //remove Dict Key from tempList
StringBuilder d = new StringBuilder();
if (!Adict.ContainsKey(Atokens[0]))
{
foreach (string s in atempList)
d.Append(s + ","); //rejoin tempList into a string with ","
d.Append("\n"); //add a linebreak to end of templist string
Adict.Add(Atokens[0], d.ToString()); //Add line to dictionary with Key
}
else //Adict does contain key... need to remove Key and add bigger string
{
List<string> removeKey = new List<string>(); //temporary list
foreach (string s in Atokens)
removeKey.Add(s); //create a new list from the token array
removeKey.Remove(Atokens[0]); //remove the key from the removeKey list
atempString = Adict[Atokens[0]]; //temporary string is what's already in dictionary
Adict.Remove(Atokens[0]); //remove the Key + Value from dictionary.
Adict.Add(Atokens[0], d.Append(atempString + Aline + "\n").ToString()); // string.Concat(tempString, ",", line));
}
//section for B
List<string> btempList = new List<string>();
string btempString;
string Bline = b.ReadLine();
string[] Btokens = Bline.Split(',');
foreach (string s in Btokens)
btempList.Add(s);
btempList.Remove(Btokens[0]);
StringBuilder f = new StringBuilder();
if (!Bdict.ContainsKey(Btokens[0]))
{
foreach (string s in btempList)
f.Append(s + ",");
f.Append("\n");
Bdict.Add(Btokens[0], f.ToString());
}
else
{
List<string> removeKey = new List<string>();
foreach (string s in Btokens)
removeKey.Add(s);
removeKey.Remove(Atokens[0]);
btempString = Bdict[Btokens[0]];
Bdict.Remove(Btokens[0]);
Bdict.Add(Btokens[0], f.Append(btempString + Bline + "\n").ToString());
}
}
output.Close();
// Console.ReadLine();
}
}
我现在陷入困境我不知道如何查看每个词典并比较键，然后加入（插入？）只是具有匹配键的行。
答案 0 :(得分：0)
首先，我认为你应该创建一个类来使用它。 我为这个问题所做的课很简单：
class WbsElement
{
public string PurchasingDocument;
public string PurchaseOrderText;
public string ValCoAreaCrcyA;
public string ValCoAreaCrcyB;
public string RefDocumentNumber;
public string Name;
}
它有一些可用于存储数据的属性。 然后我拿了你的代码并将其更改为：
private static void Main(string[] args)
{
StreamReader a = new StreamReader(@"A.CSV");
StreamReader b = new StreamReader(@"B.CSV");
StreamWriter output = new StreamWriter(@"output.csv");
Dictionary<string, WbsElement> newDict = new Dictionary<string, WbsElement>();
output.WriteLine(a.ReadLine() + "," + b.ReadLine());
while (!a.EndOfStream && !b.EndOfStream)
{
//section for A
string Aline = a.ReadLine();
string[] Atokens = Aline.Split(','); //split the line into array
if (newDict.ContainsKey(Atokens[0]))
{
newDict[Atokens[0]].PurchasingDocument = Atokens[1];
newDict[Atokens[0]].PurchaseOrderText = Atokens[2];
newDict[Atokens[0]].ValCoAreaCrcyA = Atokens[3];
}
else
{
WbsElement elementToAdd = new WbsElement();
elementToAdd.PurchasingDocument = Atokens[1];
elementToAdd.PurchaseOrderText = Atokens[2];
elementToAdd.ValCoAreaCrcyA = Atokens[3];
newDict.Add(Atokens[0], elementToAdd);
}
}
while (!b.EndOfStream)
{
//section for B
string Bline = b.ReadLine();
string[] Btokens = Bline.Split(',');
if (newDict.ContainsKey(Btokens[0]))
{
newDict[Btokens[0]].RefDocumentNumber = Btokens[1];
newDict[Btokens[0]].ValCoAreaCrcyB = Btokens[2];
newDict[Btokens[0]].Name = Btokens[3];
}
else
{
WbsElement elementToAdd = new WbsElement();
elementToAdd.RefDocumentNumber = Btokens[1];
elementToAdd.ValCoAreaCrcyB = Btokens[2];
elementToAdd.Name = Btokens[3];
newDict.Add(Btokens[0], elementToAdd);
}
}
foreach (KeyValuePair<string, WbsElement> keyValuePair in newDict)
{
output.WriteLine(string.Format("{0},{1},{2},{3},{4},{5},{6},{7}", keyValuePair.Key, keyValuePair.Value.PurchasingDocument,
keyValuePair.Value.PurchaseOrderText, keyValuePair.Value.ValCoAreaCrcyA,
keyValuePair.Key,
keyValuePair.Value.RefDocumentNumber, keyValuePair.Value.ValCoAreaCrcyB,
keyValuePair.Value.Name));
}
output.Close();
// Console.ReadLine();
}
我创建了一个新词典，用于存储键+我所制作的类的一个实例。 当我再次找到相同的密钥时，我只是将信息添加到类中。 在应用程序的最后，我只是将所有正确的数据刷新到输出流。 课程是让这一切变得简单的关键。
如果您希望它对不同长度的数据输入通用，您可以使用：
private static void Main(string[] args)
{
StreamReader a = new StreamReader(@"A.CSV");
StreamReader b = new StreamReader(@"B.CSV");
StreamWriter output = new StreamWriter(@"output.csv");
Dictionary<string, List<string>> newDict = new Dictionary<string, List<string>>();
string aLine = a.ReadLine();
int aLength = aLine.Split(',').Count();
output.WriteLine(aLine + "," + b.ReadLine());
while (!a.EndOfStream && !b.EndOfStream)
{
//section for A
string Aline = a.ReadLine();
string[] Atokens = Aline.Split(','); //split the line into array
if (newDict.ContainsKey(Atokens[0]))
{
for (int i = 0; i < Atokens.Length; i++)
{
newDict[Atokens[0]][i] = Atokens[i];
}
}
else
{
List<string> listToAdd = new List<string>();
for (int i = 0; i < Atokens.Length; i++)
{
listToAdd.Add(Atokens[i]);
}
newDict.Add(Atokens[0], listToAdd);
}
}
while (!b.EndOfStream)
{
//section for B
string Bline = b.ReadLine();
string[] Btokens = Bline.Split(',');
if (newDict.ContainsKey(Btokens[0]))
{
if (newDict[Btokens[0]].Count > aLength)
{
for (int i = 0; i < Btokens.Length; i++)
{
newDict[Btokens[0]][i + aLength] = Btokens[i];
}
}
else
{
for (int i = 0; i < Btokens.Length; i++)
{
newDict[Btokens[0]].Add(Btokens[i]);
}
}
}
else
{
List<string> listToAdd = new List<string>(aLength);
listToAdd.AddRange(Btokens);
newDict.Add(Btokens[0], listToAdd);
}
}
foreach (KeyValuePair<string, List<string>> keyValuePair in newDict)
{
string outputLine = string.Empty;
foreach (string s in keyValuePair.Value)
{
if (outputLine != string.Empty)
{
outputLine += ",";
}
outputLine += s;
}
output.WriteLine(outputLine);
}
output.Close();
// Console.ReadLine();
}
它使用一个列表来跟踪输入数据。