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데이터 테이블로 저장된 일련의 루프 및 데이터베이스 호출 (Select 문만)을 통해 값이있는 .txt 파일을 생성 중입니다. 그것은 잠시 동안 (19 행 ... 19 전체 루프 사이클) connection.Open()에 의해 던져지고 런타임 예외가 발생합니다.System.Data.OleDb.OleDbException (0x80004005) : 지정되지 않은 오류
내가 catch 블록 안에 전체 루프를 잡으려고 예외 및 메시지를 생성 한 다음 2 빈 줄을 스택 추적합니다. 
나는 이것을 읽으려고 노력했지만 무엇을 해야할지 알아 냈다.하지만 나는 DB 연결에 관해서는 약간 초보자이다. 나는 다른 곳을 보았지만 내 상황에 맞는 질문을 찾지 못하는 것 같습니다. 참고로
: C# 4.0 윈도우 폼 응용 프로그램, 액세스 DB
내가 찾고 시작 위치에 대한 몇 가지 제안을 찾으려하고있다.
internal IDbConnection GetConnection()
{
try
{
var connection = _assemblyProvider.Factory.CreateConnection();
connection.ConnectionString = _connectionString;
_connectionState = connection.State.ToString();
if (_connectionState == "Open")
GetConnection();
else
{
connection.Open();
}
return connection;
}
catch (Exception exept)
{
throw new Exception(exept.ToString() + "\n\n" + exept.StackTrace.ToString());
}
}
이 방법은 여기에서 호출되는 :
public DataTable ExecuteDataTable(string commandText, string tableName, DbParameterCollection paramCollection, CommandType commandType)
{
DataTable dtReturn;
IDbConnection connection = null;
try
{
connection = _connectionManager.GetConnection();
dtReturn = _dbAdapterManager.GetDataTable(commandText, paramCollection, connection, tableName, commandType);
}
finally
{
if (connection != null)
{
connection.Close();
connection.Dispose();
}
}
return dtReturn;
}
public DataTable ExecuteDataTable(string commandText, string tableName, CommandType commandType)
{
return ExecuteDataTable(commandText, tableName, new DbParameterCollection(), commandType);
}
public DataTable ExecuteDataTable(string commandText)
{
return ExecuteDataTable(commandText, string.Empty, CommandType.Text);
}
및
//read from DB using a SQL statement and return a DataTable
internal static DataTable readDB(string SQL)
{
var dbHelper = new DbHelper();
using (IDbConnection connection = dbHelper.GetConnObject())
{
return dbHelper.ExecuteDataTable(SQL);
}
}
여기에 루프가 있습니다 (다소 길고 아마도 더 잘 수행 될 수 있지만 그 이유는 여러 번 작동 한 후 깨는 이유를 찾고 싶습니다)
예외가 읽어 줄에서 발생합니다 : 나는 그것을 폐쇄하기 전에 연결이 3 번을 열려고하는 것을 실현 코드에 깊게 살펴본 후
SQLString = "SELECT * FROM Claim WHERE ClaimStatus <> 1";
DataTable allRecsFromClaimNotStatus1 = dbConnect.readDB(SQLString);
if (allRecsFromClaimNotStatus1.Rows.Count == 0)
return;
else
{
string path = txtExtractFileLocation.Text;
if (txtExtractFileLocation.Text.Substring(txtExtractFileLocation.Text.Length - 2) == "\\\\")
{
path = path.Substring(0, path.Length - 1);
}
if (path.Substring(path.Length - 1) == "\\")
path += "DI_Extract.txt";
else
path += @"\DI_Extract.txt";
using (StreamWriter sw = new StreamWriter(@path))
{
for (int i = 0; i < allRecsFromClaimNotStatus1.Rows.Count; i++)
{
rNum = allRecsFromClaimNotStatus1.Rows[i][2].ToString().Trim();//Claim.InsuredRecNum
SQLString = "SELECT * FROM Insured WHERE RecNum = " + rNum;
DataTable allInsuredByRecNum = dbConnect.readDB(SQLString);
lossDate = allRecsFromClaimNotStatus1.Rows[i][11].ToString().Trim();//Claim.LossDate
lossDate = (Convert.ToDateTime(lossDate)).Date.ToString("MM/dd/yyyy");
reportedDate = allRecsFromClaimNotStatus1.Rows[i][9].ToString().Trim();//Claim.ReportedDate
reportedDate = (Convert.ToDateTime(reportedDate)).Date.ToString("MM/dd/yyyy");
claim = allRecsFromClaimNotStatus1.Rows[i][0].ToString().Trim();//Claim.ClaimNumber
if (chkIncludePaymentsForCurrentMonth.Checked == true)
{
direct = allRecsFromClaimNotStatus1.Rows[i][4].ToString().Trim();//Claim.DirectReserve
WP = allRecsFromClaimNotStatus1.Rows[i][5].ToString().Trim();//Claim.WPReserve
ceded = allRecsFromClaimNotStatus1.Rows[i][6].ToString().Trim();//Claim.CededReserve
}
else
{
direct = allRecsFromClaimNotStatus1.Rows[i][29].ToString().Trim();//Claim.MonthEndDirect
WP = allRecsFromClaimNotStatus1.Rows[i][30].ToString().Trim();//Claim.MonthEndWP
ceded = allRecsFromClaimNotStatus1.Rows[i][31].ToString().Trim();//Claim.MonthEndCeded
}
ced = Convert.ToDecimal(ceded);
wav = Convert.ToDecimal(WP);
ceded = ced.ToString("#.##");
WP = wav.ToString("#.##");
if (ceded == "")
ceded = "0";
if (WP == "")
WP = "0";
if ((allRecsFromClaimNotStatus1.Rows[i][10].ToString().Trim() != null) &&
(allRecsFromClaimNotStatus1.Rows[i][10].ToString().Trim() != ""))//Claim.WaiverDate
{
onWaiver = "YES";
}
else
{
onWaiver = "NO";
}
reinsPreNotice = "NO";
reinsCeded = "NO";
switch (allRecsFromClaimNotStatus1.Rows[i][7].ToString().Trim())//Claim.CededPre
{
case "1":
{
reinsPreNotice = "YES";
break;
}
case "2":
{
reinsCeded = "YES";
break;
}
}//end switch
state = allRecsFromClaimNotStatus1.Rows[i][8].ToString().Trim();//Claim.LossState
lName = allInsuredByRecNum.Rows[0][1].ToString().Trim();//Insured.LastName
fName = allInsuredByRecNum.Rows[0][0].ToString().Trim();//Insured.FirstName
mi = allInsuredByRecNum.Rows[0][2].ToString().Trim();//Insured.MI
policy = allInsuredByRecNum.Rows[0][43].ToString().Trim();//Insured.PolicyNumber
DOB = allInsuredByRecNum.Rows[0][10].ToString().Trim();//Insured.DOB
DOB = (Convert.ToDateTime(DOB)).Date.ToString("MM/dd/yyyy");
age = allInsuredByRecNum.Rows[0][11].ToString().Trim();//Insured.TrueAge
issueAge = calculateAge(Convert.ToDateTime(allInsuredByRecNum.Rows[0][10].ToString().Trim()), //Insured.DOB
Convert.ToDateTime(allInsuredByRecNum.Rows[0][45].ToString().Trim()));//Insured.EffectiveDate
SQLString = "SELECT InsuredRecNum, RecNum FROM Claim WHERE InsuredRecNum = " + rNum;
DataTable iRecNum2ClaimRecNumFromClaim = dbConnect.readDB(SQLString);
rNum = iRecNum2ClaimRecNumFromClaim.Rows[0][1].ToString().Trim();
issueDate = allInsuredByRecNum.Rows[0][45].ToString().Trim();//Insured.EffectiveDate
issueDate = (Convert.ToDateTime(issueDate)).Date.ToString("MM/dd/yyyy");
sex = allInsuredByRecNum.Rows[0][13].ToString().Trim();//Insured.Gender
planCode = allInsuredByRecNum.Rows[0][44].ToString().Trim();//Insured.PlanMnemonic
issueAmt = allInsuredByRecNum.Rows[0][49].ToString().Trim();//Insured.BenefitAmount (Monthly Benefit Amount before Offset)
benefitPeriod = allInsuredByRecNum.Rows[0][50].ToString().Trim();//Insured.BenefitPeriod
if (allInsuredByRecNum.Rows[0][54].ToString().Trim().Length == 2)//Insured.EliminationPeriod
eliminationPeriod = "0" + allInsuredByRecNum.Rows[0][54].ToString().Trim();
else
eliminationPeriod = allInsuredByRecNum.Rows[0][54].ToString().Trim();
premiumAmount = allInsuredByRecNum.Rows[0][48].ToString().Trim();//Insured.AnnualPremium
occupationClass = allInsuredByRecNum.Rows[0][55].ToString().Trim();//Insured.OccupationClass
//select only status = EXEC (0)
SQLString = "SELECT * FROM Offset WHERE ClaimRecNum = " + rNum + " AND Status = 0";
DataTable allOffsetByClaimRecNumAndStatus0 = dbConnect.readDB(SQLString);
offsetAmt = 0;
dblSTDOffsetAmount = 0;
dblRecOffsetAmount = 0;
RECOffsetOcc = "0";
RECOffsetExecuted = "0";
int offsetCount = allOffsetByClaimRecNumAndStatus0.Rows.Count;
if (offsetCount != 0)
{
for (int j = 0; j < offsetCount; j++)
{
//accumulate standard offset (STD) and Recovery offset (REC)
if (allOffsetByClaimRecNumAndStatus0.Rows[0][1].ToString().Trim() == "0")//Offset.Type
{
//Standard Type
dblSTDOffsetAmount += Convert.ToDouble(allOffsetByClaimRecNumAndStatus0.Rows[j][4].ToString().Trim());//Offset.Amount
}
else
{
//Recovery type
dblRecOffsetAmount = Convert.ToDouble(allOffsetByClaimRecNumAndStatus0.Rows[j][4].ToString().Trim());//Offset.Amount
RECOffsetOcc = allOffsetByClaimRecNumAndStatus0.Rows[j][5].ToString().Trim();//Offset.Occurance
RECOffsetExecuted = allOffsetByClaimRecNumAndStatus0.Rows[j][6].ToString().Trim();//Offset.Executed
}//end if
}//end for loop
}//end if
STDOffsetAmount = dblSTDOffsetAmount.ToString();
RECOffsetAmount = dblRecOffsetAmount.ToString();
if (chkIncludePaymentsForCurrentMonth.Checked == true)
SQLString = "SELECT * FROM Payment WHERE InsuredRecNum = " + rNum + " AND IssueDate >= #01/01/" + DateTime.Today.Date.Year + "# AND IssueDate <= #" + DateTime.Today.Date.ToShortDateString() + "#";
else
SQLString = "SELECT * FROM Payment WHERE InsuredRecNum = " + rNum + " AND IssueDate >= #01/01/" + endDate.Substring(endDate.Length - 4) + "# AND IssueDate <= #" + Convert.ToDateTime(endDate).Date.ToShortDateString() + "#";
DataTable allPaymentByIRecNumAndIssDateInRange = dbConnect.readDB(SQLString);
YTDPmt = 0;
if (allPaymentByIRecNumAndIssDateInRange.Rows.Count == 0)
YTDPmt = 0;
else
{
int paymentCount = allPaymentByIRecNumAndIssDateInRange.Rows.Count;
double issAmt;
for (int k = 0; k < paymentCount; k++)
{
issAmt = Convert.ToDouble(allPaymentByIRecNumAndIssDateInRange.Rows[0][30].ToString().Trim());//Payment.IssueAmount
YTDPmt += issAmt;
}// end loop
}//end if
YTDPmts = YTDPmt.ToString();
if (chkIncludePaymentsForCurrentMonth.Checked == true)
SQLString = "SELECT * FROM Payment WHERE ClaimRecNum = " + rNum;
else
SQLString = "SELECT * FROM Payment WHERE ClaimRecNum = " + rNum + " AND IssueDate <= #" + Convert.ToDateTime(endDate).Date.ToShortDateString() + "#";
DataTable allPaymentByRNum = dbConnect.readDB(SQLString);
totalPmt = 0;
if (allPaymentByRNum.Rows.Count == 0)
totalPmt = 0;
else
{
double issAmt = Convert.ToDouble(allPaymentByRNum.Rows[0][30].ToString().Trim());
for (int m = 0; m < allPaymentByRNum.Rows.Count; m++)
{
totalPmt += issAmt;
}
}
allPmts = totalPmt.ToString();
//set spacing for output
string block1 = policy + claim + planCode;
block1 = setSpacing(block1, 28);
string block2 = setSpacing(benefitPeriod, 3) + eliminationPeriod + occupationClass;
block2 = setSpacing(block2, 11);
issueAmt = setSpacing(issueAmt, 8);
STDOffsetAmount = setSpacing(STDOffsetAmount, 8);
RECOffsetAmount = setSpacing(RECOffsetAmount, 8);
RECOffsetOcc = setSpacing(RECOffsetOcc, 3);
RECOffsetExecuted = setSpacing(RECOffsetExecuted, 3);
string block3 = lossDate + age;
block3 = setSpacing(block3, 13);
issueAge = setSpacing(issueAge, 3);
string block4 = issueDate + DOB + sex + onWaiver + premiumAmount;
block4 = setSpacing(block4, 32);
reinsPreNotice = setSpacing(reinsPreNotice, 3);
reinsCeded = setSpacing(reinsCeded, 4);
double ap = Convert.ToDouble(allPmts);
allPmts = ap.ToString("#.#");
allPmts = setSpacing(allPmts, 8);
YTDPmts = setSpacing(YTDPmts, 8);
lName = setSpacing(lName, 19);
fName = fName + " " + mi;
fName = setSpacing(fName, 20);
string block5 = state + direct;
block5 = setSpacing(block5, 10);
ceded = setSpacing(ceded, 8);
WP = setSpacing(WP, 8);
reportedDate = setSpacing(reportedDate, 10);
//save row data for text file
dataOutput = (block1 + block2 + issueAmt + STDOffsetAmount + RECOffsetAmount + RECOffsetOcc + RECOffsetExecuted +
block3 + issueAge + block4 + reinsPreNotice + reinsCeded + allPmts + YTDPmts + lName + fName +
block5 + ceded + WP + reportedDate);
//Write to the output record DI_Extract.txt
sw.WriteLine(dataOutput);
counter++;
pbrRecordsProcessed.Value = counter;
}//end for loop
}//end streamwriter
}//end if
루프 내부에서'OleDbConnection'을 여는 것처럼 들립니다. 다음 반복 전에 연결을 닫는 것을 기억하십니까? 또한 각 반복마다 새로운 연결을 열어야합니까, 아니면 루프 전에 연결을 연 다음 나중에 닫을 수 있습니까? (코드의 관련 부분을 보지 않고도 우리가 할 수있는 일은 모두 짐작할 수 있습니다.) –
@Gord My Data Access가 열리고 SQL 명령을 실행 한 다음 즉시 닫습니다. 이것은 내 프로그램의 모든 곳에서 아무런 문제없이 작동하지만, 19 개의 전체 루프를 실행 한 후에는 언제나 멈추고 그 예외를 제공합니다. 나는 그것이 왜 작동 할 것인가에 대해 확신 할 수 없으며, 겉으로보기에는 어디에서나 작동을 멈추게됩니다. – SteveAnselment
@Gord 내가 찾은 모든 관련 코드를 포함하도록 내 질문을 편집했습니다. – SteveAnselment