我正在使用Quickbook的IIF文件格式，我需要编写一个解析器来读取和写入IIF文件，我在阅读文件时遇到了一些问题。
文件很简单，它们是标签。每一行都是表定义或行。定义以'！'开头和表名，行只以表名开头。这是我遇到的问题：一些字段允许换行。
当我第一次遇到这个时，我想，好吧只是按标签而不是逐行解析它，但为了做到这一点，我不得不用标签替换换行符，并且使用比列更多的值，但是，我在最多列中分散了断线的值。
你会如何解析这样的文件？
编辑：一个例子
!CUST NAME REFNUM TIMESTAMP BADDR1 BADDR2 BADDR3 BADDR4 BADDR5 SADDR1 SADDR2 SADDR3 SADDR4 SADDR5 PHONE1 PHONE2 FAXNUM CONT1 CONT2 CTYPE TERMS TAXABLE LIMIT RESALENUM REP TAXITEM NOTEPAD SALUTATION COMPANYNAME FIRSTNAME MIDINIT LASTNAME CUSTFLD1 CUSTFLD2 CUSTFLD3 CUSTFLD4 CUSTFLD5 CUSTFLD6 CUSTFLD7 CUSTFLD8 CUSTFLD9 CUSTFLD10 CUSTFLD11 CUSTFLD12 CUSTFLD13 CUSTFLD14 CUSTFLD15 JOBDESC JOBTYPE JOBSTATUS JOBSTART JOBPROJEND JOBEND HIDDEN DELCOUNT
CUST St. Mark 359 1176670332 Saint Mark Catholic Church 609 W Main St City, State Zip
!CLASS NAME REFNUM TIMESTAMP HIDDEN DELCOUNT
!INVITEM NAME REFNUM TIMESTAMP INVITEMTYPE DESC PURCHASEDESC ACCNT ASSETACCNT COGSACCNT QNTY QNTY PRICE COST TAXABLE PAYMETH TAXVEND TAXDIST PREFVEND REORDERPOINT EXTRA CUSTFLD1 CUSTFLD2 CUSTFLD3 CUSTFLD4 CUSTFLD5 DEP_TYPE ISPASSEDTHRU HIDDEN DELCOUNT USEID
INVITEM Labor 1 1119915308 SERV Labor 0
!TIMEACT DATE JOB EMP ITEM PITEM DURATION PROJ NOTE XFERTOPAYROLL BILLINGSTATUS
TIMEACT 3/8/08 876 Development Jane Doe {Consultant} Labor 00:15 Renewing all domain name for 876 Development.
REIMBURSEMENT: 44.72 for one year renewal on all domain names. N 1
TIMEACT 3/17/08 Greg:Bridge Jane Doe {Consultant} Labor 01:00 Preparing Studio N 1
TIMEACT 3/17/08 John Doe and Associates Jane Doe {Consultant} Labor 00:06 REIMBURSEMENT: Toner cartridge on ebay & Fuser from FastPrinters- ask wendell before invoicing to see if this fixed the problem
49.99 (include tax) toner
$175.18 (include tax) fuser
N 1
TIMEACT 3/17/08 John Doe II Jane Doe {Consultant} Labor 01:00 Fixing Kandis's computer - replaced entire computer with similar system N 1
答案 0 :(得分：5)
我做到了：
public DataSet parseIIF(Stream file) {
iifSet = new DataSet();
String fileText;
using (StreamReader sr = new StreamReader(file)) {
fileText = sr.ReadToEnd();
}
//replace line breaks with tabs
//fileText.Replace('\n', '\t');
fileText = fileText.Replace("\r\n", "\n");
fileText = fileText.Replace('\r', '\n');
//split along tabs
string[] lines = fileText.Split('\n');
this.createTables(lines, iifSet);
this.fillSet(lines, iifSet);
return iifSet;
}
/// <summary>
/// Reads an array of lines and parses them into tables for the dataset
/// </summary>
/// <param name="lines">String Array of lines from the iif file</param>
/// <param name="iifSet">DataSet to be manipulated</param>
private void fillSet(string[] lines, DataSet set) {
//CODING HORROR
//WARNING: I will monkey with the for loop index, be prepared!
for (int i = 0; i < lines.Length; i++) {
if (this.isTableHeader(lines[i])) {
//ignore this line, tables are alread defined
continue;
}
if (lines[i] == "" || lines[i] == "\r" || lines[i] == "\n\r" || lines[i] == "\n") {
//ignore lines that are empty if not inside a record
//probably the end of the file, it always ends with a blank line break
continue;
}
if (lines[i].IndexOf(";__IMPORTED__") != -1) {
continue;
//just signifying that it's been imported by quickbook's timer before, don't need it
}
string line = lines[i];
while (!isFullLine(line, set)){
i++; //<--------------------------- MONKEYING done here!
line += lines[i];
}
//now, the line should be complete, we can parse it by tabs now
this.parseRecord(line, set);
}
}
private void parseRecord(string line, DataSet set) {
if (isTableHeader(line)) {
//we don't want to deal with headers here
return;
}
String tablename = line.Split('\t')[0];
//this just removes the first value and the line break from the last value
String[] parameters = this.createDataRowParams(line);
//add it to the dataset
set.Tables[tablename].Rows.Add(parameters);
}
private bool isFullLine(string line, DataSet set) {
if (isTableHeader(line)) {
return true; //assumes table headers won't have line breaks
}
int values = line.Split('\t').Length;
string tableName = line.Split('\t')[0];
int columns = set.Tables[tableName].Columns.Count;
if (values < columns) {
return false;
} else {
return true;
}
}
private void createTables(string[] lines, DataSet set) {
for (int index = 0; index < lines.Length; index++) {
if (this.isTableHeader(lines[index])) {
set.Tables.Add(createTable(lines[index]));
}
}
}
private bool isTableHeader(string tab) {
if (tab.StartsWith("!"))
return true;
else
return false;
}
private bool isNewLine(string p) {
if (p.StartsWith("!"))
return true;
if (iifSet.Tables[p.Split('\t')[0]] != null) //that little mess there grabs the first record in the line, sorry about the mess
return true;
return false;
}
private DataTable createTable(string line) {
String[] values = line.Split('\t');
//first value is always the title
//remove the ! from it
values[0] = values[0].Substring(1); //remove the first character
DataTable dt = new DataTable(values[0]);
values[0] = null; //hide first title so it doesn't get used, cheaper than resetting array
foreach (String name in values) {
if (name == null || name == "")
continue;
DataColumn dc = new DataColumn(name, typeof(String));
try {
dt.Columns.Add(dc);
} catch (DuplicateNameException) {
//odd
dc = new DataColumn(name + "_duplicateCol" + dt.Columns.Count.ToString());
dt.Columns.Add(dc);
//if there is a triple, just throw it
}
}
return dt;
}
private string getTableName(string line) {
String[] values = line.Split('\t');
//first value is always the title
if(values[0].StartsWith("!")){
//remove the ! from it
values[0] = values[0].Substring(1); //remove the first character
}
return values[0];
}
private string[] createDataRowParams(string line) {
string[] raw = line.Split('\t');
string[] values = new string[raw.Length - 1];
//copy all values except the first one
for (int i = 0; i < values.Length; i++) {
values[i] = raw[i + 1];
}
//remove last line break from the record
if (values[values.Length - 1].EndsWith("\n")) {
values[values.Length - 1] = values[values.Length - 1].Substring(0, values[values.Length - 1].LastIndexOf('\n'));
} else if (values[values.Length - 1].EndsWith("\n\r")) {
values[values.Length - 1] = values[values.Length - 1].Substring(0, values[values.Length - 1].LastIndexOf("\n\r"));
} else if (values[values.Length - 1].EndsWith("\r")) {
values[values.Length - 1] = values[values.Length - 1].Substring(0, values[values.Length - 1].LastIndexOf('\r'));
}
return values;
}
private string[] createDataRowParams(string line, int max) {
string[] raw = line.Split('\t');
int length = raw.Length - 1;
if (length > max) {
length = max;
}
string[] values = new string[length];
for (int i = 0; i < length; i++) {
values[i] = raw[i + 1];
}
if (values[values.Length - 1].EndsWith("\n")) {
values[values.Length - 1] = values[values.Length - 1].Substring(0, values[values.Length - 1].LastIndexOf('\n'));
} else if (values[values.Length - 1].EndsWith("\n\r")) {
values[values.Length - 1] = values[values.Length - 1].Substring(0, values[values.Length - 1].LastIndexOf("\n\r"));
} else if (values[values.Length - 1].EndsWith("\r")) {
values[values.Length - 1] = values[values.Length - 1].Substring(0, values[values.Length - 1].LastIndexOf('\r'));
}
return values;
}
答案 1 :(得分：1)
我已经做了一段时间，因为我已经完成了IIF，但除非他们已经修好了，否则QuickBooks会对这些换行进行调整。似乎these folks有同样的问题，他们用空格处理它。
就个人而言，当我遇到QuickBooks时，我会倾向于管道或能够清楚描绘换行符的东西。如果您绝对肯定必须有换行符，请加入Intuit Developer Network并使用SDK在程序导入后将这些值发送给QB。
答案 2 :(得分：0)
为什么不用空格而不是制表符替换换行符？
答案 3 :(得分：0)
我一直遇到这种事情。关键是在你进行解析时处理这样的特殊情况是用特殊情况替换文本中极不可能发生的事情，然后在完成后再次替换它。
例如，输出中有换行符，可以使用Regex轻松检测到。使用Regex.Replace将它们转换为 LINEBREAK 之类的内容。使它在编辑器中脱颖而出以进行调试。然后正常进行剩下的解析，最后一步，用原始值（或新的）替换特殊标记。
答案 4 :(得分：0)
思路：
预处理文件，用一些高ascii字符替换换行符（假设它是单个CR或LF）。然后通过tab解析，最后用断路器替换所说的high-ascii。
不是逐行处理，而是逐个字符地处理。请注意，如果嵌入的换行符与记录末尾的标准CRLF有某种不同，那么它仍然有效。
答案 5 :(得分：0)
我在CodePlex上发现了这个。你可以使用nugget包来获得它。 https://qif.codeplex.com/
我测试了它，我能够读写快速书籍格式。