C# 如何将查询结果导出到文本文件并同时创建数据块？
我被分配了一个项目，其中我的需求是用来自DB2数据库的数据构建一个文本文件，到目前为止，我得到了文件所需的所有数据和布局，除了一部分。文件中的每个记录在记录的开头都由一个常量标识，前两个记录类型“a”和“B”是硬编码信息，因此这里没有来自DB的数据 例如：C# 如何将查询结果导出到文本文件并同时创建数据块？,c#,asp.net,.net,sql,visual-studio,C#,Asp.net,.net,Sql,Visual Studio,我被分配了一个项目，其中我的需求是用来自DB2数据库的数据构建一个文本文件，到目前为止，我得到了文件所需的所有数据和布局，除了一部分。文件中的每个记录在记录的开头都由一个常量标识，前两个记录类型“a”和“B”是硬编码信息，因此这里没有来自DB的数据 例如： AASNxxxxxxxxONT0010585567 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx T201201190945xxxxxxxxxxxx 201201241245 B
AASNxxxxxxxxONT0010585567 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
T201201190945xxxxxxxxxxxx 201201241245
B 1042 000
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T201201190945xxxxxxxxxxxx 201201241245
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//Declare the ConnectionString
odbccon.ConnectionString = ConfigurationManager.AppSettings["PkMS"];
//Create Physical File
w = File.CreateText("C:\\Users\\jorge.mejia\\Documents\\ThirdParty_ASN\\Test Files\\xxxxASN_" + DateTime.Now.ToString("HHmmss") + ".txt");
//Create Header Record - Type "A"
w.WriteLine(constantA + fileidentifier + clientidentifier + primaryscac + dcidentifier + shipmentID + masterBOL + buildingID);
//Create Load Record - Type "T"
w.WriteLine(constantT + trailerclosedate + trailerclosetime + trailernumber + sealnumber + expectedarrivaldate + expectedarrivaltime + trailerserialnumber + carrier);
odbccon.Open();
OdbcCommand getstore = new OdbcCommand("select count(*) as totalstorecartons, chstor from wm242basd.chcart00 where chldno = '0010585567' group by chstor order by chstor", odbccon);
OdbcDataReader odbcr2 = getstore.ExecuteReader();
while (odbcr2.Read())
{
storenumber = odbcr2["chstor"].ToString();
totalstorecartons = odbcr2["totalstorecartons"].ToString();
//Create Store Record - Type "B"
w.WriteLine(constantB + deliverycarrierSCAC + clientroute + businesscode + storenumber + clientbolnumber + terminalcode + deliverydays + deliverystarttime + deliveryendtime + carrierpro + expecteddeliverydate);
OdbcCommand getcartons = new OdbcCommand("select chcasn, chstor, chacwt from wm242basd.chcart00 where chldno = '0010585567' order by chstor", odbccon);
OdbcDataReader odbcr = getcartons.ExecuteReader();
while (odbcr.Read())
{
cartonnumber = odbcr["chcasn"].ToString() + " ";
storenumber = odbcr["chstor"].ToString() + " ";
weightlbs = odbcr["chacwt"].ToString();
//Create Store Record - Type "C"
w.WriteLine(constantC + cartonnumber + weightlbs + cubicfeet + conveyable + specialhandling + cartonvalue + cartonretail + units + palletnumber);
}
//Create Store Record - Type "D"
w.WriteLine(constantD + totalstorecartons + totalstoreweight + totalstorecubicfeet);
}
OdbcCommand getloadtotal = new OdbcCommand("select count(*) as totaltrailercartons, sum(chacwt) as totaltrailerweight from wm242basd.chcart00 where chldno = '0010585567'", odbccon);
OdbcDataReader odbcr3 = getloadtotal.ExecuteReader();
while (odbcr3.Read())
{
totaltrailercartons = odbcr3["totaltrailercartons"].ToString();
totaltrailerweight = odbcr3["totaltrailerweight"].ToString();
}
//Create Store Record - Type "E"
w.WriteLine(constantE + totaltrailercartons + totaltrailerweight + totaltrailercubicfeet);
//Maintenance and Close
w.Flush();
w.Close();
您能提供的任何帮助都将不胜感激。您似乎有两个问题。第一，你只经历了一次外环我不知道为什么，但我可以帮你解决第二个问题。第二个问题是，内部循环的查询一次需要限制为一组数据 在getcartons查询中：
从wm242basd.chcart00中选择chcasn、chstor、chacwt，其中chldno='0010585567'按chstor下单while (odbcr2.Read())
{
storenumber = odbcr2["chstor"].ToString();
totalstorecartons = odbcr2["totalstorecartons"].ToString();
//Create Store Record - Type "B"
w.WriteLine(constantB + deliverycarrierSCAC + clientroute + businesscode + storenumber + clientbolnumber + terminalcode + deliverydays + deliverystarttime + deliveryendtime + carrierpro + expecteddeliverydate);
OdbcCommand getcartons = new OdbcCommand("select chcasn, chstor, chacwt from wm242basd.chcart00 where chldno = '0010585567' and chstor = :storeNumber", odbccon);
getcartons.AddParameter("storeNumber", storenumber);
OdbcDataReader odbcr = getcartons.ExecuteReader();
while (odbcr.Read())
{
cartonnumber = odbcr["chcasn"].ToString() + " ";
storenumber = odbcr["chstor"].ToString() + " ";
weightlbs = odbcr["chacwt"].ToString();
//Create Store Record - Type "C"
w.WriteLine(constantC + cartonnumber + weightlbs + cubicfeet + conveyable + specialhandling + cartonvalue + cartonretail + units + palletnumber);
}
//Create Store Record - Type "D"
w.WriteLine(constantD + totalstorecartons + totalstoreweight + totalstorecubicfeet);
}
OdbcCommand getcartons = new OdbcCommand("select chcasn, chstor, chacwt from wm242basd.chcart00 where chldno = '0010585567' and chstor = :storeNumber", odbccon);
getcartons.AddParameter("storeNumber", storenumber);
另外，如果您正在使用VisualStudio，并且可以从本地计算机连接到DB，那么这将很容易调试。只需在每个循环中放置一个断点，然后查看查询结果。您确实需要缩短问题中的示例。如果没有大量的滚动，你不可能完全阅读这个问题。作为一个做大量数据导入的人，如果有人给我这样的文件来导入，我会向他们开枪。在我花很多时间在这方面之前，我会确保需要这些信息的人真的更愿意以这种格式获取这些信息。有时，提出这些要求的人既没有与信息的提供者也没有与信息的接收者交谈，以确保这是最好的格式。（如果是大型机，它可能是）我们将文件返回给客户机，并以更好的格式请求，他们通常会说“哦，好吧，我们不知道这会更容易”。我已经这样做了，事实上以前情况更糟，是的，这将是大型机。