C# 如何将数据库表内容发送到API？
我在SQL Server数据库表中有需要传输到支付处理API的记录。只有传输=0的表记录才会发送到API。我发现这有助于我理解手头的错误 我想将数据库表中的记录读入C#类，解析成JSON，然后通过API调用发送。我曾尝试使用Entity Framework Core，但在调用存储过程并将结果添加到模型类时收到空引用异常，如下所示：C# 如何将数据库表内容发送到API？,c#,sql-server,C#,Sql Server,我在SQL Server数据库表中有需要传输到支付处理API的记录。只有传输=0的表记录才会发送到API。我发现这有助于我理解手头的错误 我想将数据库表中的记录读入C#类，解析成JSON，然后通过API调用发送。我曾尝试使用Entity Framework Core，但在调用存储过程并将结果添加到模型类时收到空引用异常，如下所示： public async Task<IEnumerator<Onboarding>> GetOnboardingList()
public async Task<IEnumerator<Onboarding>> GetOnboardingList()
{
try
{
using (var context = new SOBOContext())
{
var ob = await context.Onboarding
//.Where(o => o.Transmitted == false)
.FromSql("Execute GetUnsentOnboardingRecords_sp")
.ToListAsync();
Console.WriteLine(ob.ToArray());
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return new OnboardingList().GetEnumerator();
}
var listOnboardingModel = new List<Onboarding>();
try
{
using (SqlConnection connection = new SqlConnection(builder.ConnectionString))
{
SqlCommand cmd = new SqlCommand("GetUnsentOnboardingRecords_sp", connection)
{
CommandType = CommandType.StoredProcedure
};
connection.Open();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
listOnboardingModel.Add(new Onboarding
{
OnboardingId = reader[1] as int? ?? 0,
UserId = reader[2] as int?,
UserName = reader[3].ToString(),
FirstName = reader[4].ToString(),
MiddleInitial = reader[5].ToString(),
Lastname = reader[6].ToString(),
DateOfBirth = reader[7].ToString(),
Ssn = reader[8].ToString(),
Email = reader[9].ToString(),
Address1Line1 = reader[10].ToString(),
Address1Line2 = reader[11].ToString(),
Address1ApartmentNumber = reader[12].ToString(),
Address1City = reader[13].ToString(),
Address1State = reader[14].ToString(),
Address1ZipCode = reader[15].ToString(),
Address1Country = reader[16].ToString(),
DayPhone = reader[17].ToString(),
EveningPhone = reader[18].ToString(),
PhonePin = reader[19].ToString(),
MerchantSourceIp = reader[20].ToString(),
ThreatMetrixPolicy = reader[21].ToString(),
SessionId = reader[22].ToString(),
BankAccount1CountryCode = reader[23].ToString(),
BankAccount1Name = reader[24].ToString(),
BankAccount1Description = reader[25].ToString(),
BankAccount1Number = reader[26].ToString(),
BankAccount1OwnershipType = reader[27].ToString(),
BankAccount1Type = reader[28].ToString(),
BankAccount1BankName = reader[29].ToString(),
BankAccount1RoutingNumber = reader[30].ToString(),
BankAccount2CountryCode = reader[31].ToString(),
BankAccount2Name = reader[32].ToString(),
BankAccount2Number = reader[33].ToString(),
BankAccount2OwnershipType = reader[34].ToString(),
BankAccount2Type = reader[35].ToString(),
BankAccount2BankName = reader[36].ToString(),
BankAccount2Description = reader[37].ToString(),
BankAccount2RoutingNumber = reader[38].ToString(),
AuthSginerFirstName = reader[39].ToString(),
AuthSignerLastName = reader[40].ToString(),
AuthSignerTitle = reader[41].ToString(),
AverageTicket = reader[42] as int? ?? 0,
BusinessLegalName = reader[43].ToString(),
BusinessApartmentNumber = reader[44].ToString(),
BusinessAddressLine1 = reader[45].ToString(),
BusinessAddressLine2 = reader[46].ToString(),
BusinessCity = reader[47].ToString(),
BusinessState = reader[48].ToString(),
BusinessZipCode = reader[49].ToString(),
BusinessCountry = reader[50].ToString(),
BusinessDescription = reader[51].ToString(),
DoingBusinessAs = reader[52].ToString(),
Ein = reader[53].ToString(),
HighestTicket = reader[54] as int? ?? 0,
MerchantCategoryCode = reader[55].ToString(),
MonthlyBankCardVolume = reader[56] as int? ?? 0,
OwnerFirstName = reader[57].ToString(),
OwnerLastName = reader[58].ToString(),
OwnerSsn = reader[59].ToString(),
OwnerDob = reader[60].ToString(),
OwnerApartmentNumber = reader[61].ToString(),
OwnerAddress = reader[62].ToString(),
OwnerAddress2 = reader[63].ToString(),
OwnerCity = reader[64].ToString(),
OwnerRegion = reader[65].ToString(),
OwnerZipCode = reader[66].ToString(),
OwnerCountry = reader[67].ToString(),
OwnerTitle = reader[68].ToString(),
OwnerPercentage = reader[69].ToString(),
BusinessUrl = reader[70].ToString(),
CreditCardNumber = reader[71].ToString(),
ExpirationDate = reader[72].ToString(),
NameOnCard = reader[73].ToString(),
PaymentMethodId = reader[74].ToString(),
PaymentBankAccountNumber = reader[75].ToString(),
PaymentBankRoutingNumber = reader[76].ToString(),
PaymentBankAccountType = reader[77].ToString(),
Transmitted = reader[78] as bool?,
TransmitDate = reader[79].ToString(),
InternationalId = reader[80].ToString(),
DriversLicenseVersion = reader[81].ToString(),
DocumentType = reader[82].ToString(),
DocumentExpDate = reader[83].ToString(),
DocumentIssuingState = reader[84].ToString(),
MedicareReferenceNumber = reader[85].ToString(),
MedicareCardColor = reader[86].ToString(),
PaymentBankAccountName = reader[87].ToString(),
PaymentBankAccountDescription = reader[88].ToString(),
PaymentBankCountryCode = reader[89].ToString(),
PaymentBankName = reader[90].ToString(),
PaymentBankOwnershipType = reader[91].ToString()
});
}
}
connection.Close();
}
Console.WriteLine(listOnboardingModel);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return listOnboardingModel;
public async Task<IEnumerator<Onboarding>> GetOnboardingList()
{
try
{
using (var context = new SOBOContext())
{
var ob = await context.Onboarding
//.Where(o => o.Transmitted == false)
.FromSql("Execute GetUnsentOnboardingRecords_sp")
.ToListAsync();
Console.WriteLine(ob.ToArray());
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return new OnboardingList().GetEnumerator();
}
var listOnboardingModel = new List<Onboarding>();
try
{
using (SqlConnection connection = new SqlConnection(builder.ConnectionString))
{
SqlCommand cmd = new SqlCommand("GetUnsentOnboardingRecords_sp", connection)
{
CommandType = CommandType.StoredProcedure
};
connection.Open();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
listOnboardingModel.Add(new Onboarding
{
OnboardingId = reader[1] as int? ?? 0,
UserId = reader[2] as int?,
UserName = reader[3].ToString(),
FirstName = reader[4].ToString(),
MiddleInitial = reader[5].ToString(),
Lastname = reader[6].ToString(),
DateOfBirth = reader[7].ToString(),
Ssn = reader[8].ToString(),
Email = reader[9].ToString(),
Address1Line1 = reader[10].ToString(),
Address1Line2 = reader[11].ToString(),
Address1ApartmentNumber = reader[12].ToString(),
Address1City = reader[13].ToString(),
Address1State = reader[14].ToString(),
Address1ZipCode = reader[15].ToString(),
Address1Country = reader[16].ToString(),
DayPhone = reader[17].ToString(),
EveningPhone = reader[18].ToString(),
PhonePin = reader[19].ToString(),
MerchantSourceIp = reader[20].ToString(),
ThreatMetrixPolicy = reader[21].ToString(),
SessionId = reader[22].ToString(),
BankAccount1CountryCode = reader[23].ToString(),
BankAccount1Name = reader[24].ToString(),
BankAccount1Description = reader[25].ToString(),
BankAccount1Number = reader[26].ToString(),
BankAccount1OwnershipType = reader[27].ToString(),
BankAccount1Type = reader[28].ToString(),
BankAccount1BankName = reader[29].ToString(),
BankAccount1RoutingNumber = reader[30].ToString(),
BankAccount2CountryCode = reader[31].ToString(),
BankAccount2Name = reader[32].ToString(),
BankAccount2Number = reader[33].ToString(),
BankAccount2OwnershipType = reader[34].ToString(),
BankAccount2Type = reader[35].ToString(),
BankAccount2BankName = reader[36].ToString(),
BankAccount2Description = reader[37].ToString(),
BankAccount2RoutingNumber = reader[38].ToString(),
AuthSginerFirstName = reader[39].ToString(),
AuthSignerLastName = reader[40].ToString(),
AuthSignerTitle = reader[41].ToString(),
AverageTicket = reader[42] as int? ?? 0,
BusinessLegalName = reader[43].ToString(),
BusinessApartmentNumber = reader[44].ToString(),
BusinessAddressLine1 = reader[45].ToString(),
BusinessAddressLine2 = reader[46].ToString(),
BusinessCity = reader[47].ToString(),
BusinessState = reader[48].ToString(),
BusinessZipCode = reader[49].ToString(),
BusinessCountry = reader[50].ToString(),
BusinessDescription = reader[51].ToString(),
DoingBusinessAs = reader[52].ToString(),
Ein = reader[53].ToString(),
HighestTicket = reader[54] as int? ?? 0,
MerchantCategoryCode = reader[55].ToString(),
MonthlyBankCardVolume = reader[56] as int? ?? 0,
OwnerFirstName = reader[57].ToString(),
OwnerLastName = reader[58].ToString(),
OwnerSsn = reader[59].ToString(),
OwnerDob = reader[60].ToString(),
OwnerApartmentNumber = reader[61].ToString(),
OwnerAddress = reader[62].ToString(),
OwnerAddress2 = reader[63].ToString(),
OwnerCity = reader[64].ToString(),
OwnerRegion = reader[65].ToString(),
OwnerZipCode = reader[66].ToString(),
OwnerCountry = reader[67].ToString(),
OwnerTitle = reader[68].ToString(),
OwnerPercentage = reader[69].ToString(),
BusinessUrl = reader[70].ToString(),
CreditCardNumber = reader[71].ToString(),
ExpirationDate = reader[72].ToString(),
NameOnCard = reader[73].ToString(),
PaymentMethodId = reader[74].ToString(),
PaymentBankAccountNumber = reader[75].ToString(),
PaymentBankRoutingNumber = reader[76].ToString(),
PaymentBankAccountType = reader[77].ToString(),
Transmitted = reader[78] as bool?,
TransmitDate = reader[79].ToString(),
InternationalId = reader[80].ToString(),
DriversLicenseVersion = reader[81].ToString(),
DocumentType = reader[82].ToString(),
DocumentExpDate = reader[83].ToString(),
DocumentIssuingState = reader[84].ToString(),
MedicareReferenceNumber = reader[85].ToString(),
MedicareCardColor = reader[86].ToString(),
PaymentBankAccountName = reader[87].ToString(),
PaymentBankAccountDescription = reader[88].ToString(),
PaymentBankCountryCode = reader[89].ToString(),
PaymentBankName = reader[90].ToString(),
PaymentBankOwnershipType = reader[91].ToString()
});
}
}
connection.Close();
}
Console.WriteLine(listOnboardingModel);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return listOnboardingModel;
var listOnboardingModel=new List（）；
尝试
{
使用（SqlConnection=newsqlconnection（builder.ConnectionString））
{
SqlCommand cmd=newsqlcommand（“GetUnsentOnboardingRecords_sp”，连接）
{
CommandType=CommandType.StoredProcess
};
connection.Open（）；
使用（var reader=cmd.ExecuteReader（））
{
while（reader.Read（））
{
listOnboardingModel.Add（新入职）
{
OnboardingId=读卡器[1]为int？？？0，
UserId=读卡器[2]为int？，
用户名=读卡器[3]。ToString（），
FirstName=读取器[4]。ToString（），
MiddleInitial=读取器[5]。ToString（），
Lastname=读取器[6]。ToString（），
DateOfBirth=读取器[7]。ToString（），
Ssn=读取器[8]。ToString（），
Email=读卡器[9]。ToString（），
Address1Line1=读取器[10]。ToString（），
Address1Line2=读取器[11]。ToString（），
Address1ApartmentNumber=读取器[12]。ToString（），
Address1City=reader[13]。ToString（），
Address1State=读取器[14]。ToString（），
Address1ZipCode=读取器[15]。ToString（），
Address1Country=读取器[16]。ToString（），
DayPhone=读卡器[17]。ToString（），
晚间电话=读卡器[18]。ToString（），
PhonePin=读取器[19]。ToString（），
MerchantSourceIp=读取器[20]。ToString（），
ThreatMetrixPolicy=读取器[21]。ToString（），
SessionId=读取器[22]。ToString（），
BankAccount1CountryCode=读取器[23]。ToString（），
BankAccount1Name=读卡器[24]。ToString（），
BankAccount1Description=读卡器[25]。ToString（），
BankAccount1Number=读卡器[26]。ToString（），
BankAccount1OwnershipType=读取器[27]。ToString（），
BankAccount1Type=读取器[28]。ToString（），
BankAccount1BankName=读取器[29]。ToString（），
BankAccount1RoutinNumber=读卡器[30]。ToString（），
BankAccount2CountryCode=读取器[31]。ToString（），
BankAccount2Name=读取器[32]。ToString（），
BankAccount2Number=读卡器[33]。ToString（），
BankAccount2OwnershipType=读取器[34]。ToString（），
BankAccount2Type=读取器[35]。ToString（），
BankAccount2BankName=读取器[36]。ToString（），
BankAccount2Description=读卡器[37]。ToString（），
BankAccount2RoutingNumber=读取器[38]。ToString（），
AuthSginerFirstName=读取器[39]。ToString（），
AuthSignerLastName=读取器[40]。ToString（），
AuthSignerTitle=读取器[41]。ToString（），
AverageTicket=读卡器[42]作为int？？？0，
BusinessLegalName=读取器[43]。ToString（），
BusinessApartmentNumber=读取器[44]。ToString（），
BusinessAddressLine1=读取器[45]。ToString（），
BusinessAddressLine2=读取器[46]。ToString（），
BusinessCity=reader[47]。ToString（），
BusinessState=reader[48]。ToString（），
BusinessZipCode=reader[49]。ToString（），
BusinessCountry=reader[50]。ToString（），
BusinessDescription=读取器[51]。ToString（），
DoingBusinessAs=reader[52]。ToString（），
Ein=读取器[53]。ToString（），
最高票证=读卡器[54]为整数？？？0，
MerchantCategoryCode=读取器[55]。ToString（），
MonthlyBankCardVolume=读卡器[56]为整数？？？0，
OwnerFirstName=读取器[57]。ToString（），
OwnerLastName=读取器[58]。ToString（），
OwnerSsn=读取器[59]。ToString（），
OwnerDob=读取器[60]。ToString（），
OwnerPartmentNumber=读取器[61]。ToString（），
OwnerAddress=读取器[62]。ToString（），
OwnerAddress2=读取器[63]。ToString（），
OwnerCity=reader[64]。ToString（），
OwnerRegion=读取器[65]。ToString（），
OwnerZipCode=读取器[66]。ToString（），
OwnerCountry=读取器[67]。ToString（），
OwnerTitle=读取器[68]。ToString（），
using(var connection = new SqlConnection(...))
using(var command = new SqlCommand(..., ...))
{
connection.Open();
...
using(var reader = command.ExecuteReader())
while(reader.Read())
{
}
}