[英]Returning ResultSet from AS400 Stored Procedure
I'm Struggling returning a result set from an AS400 database using a C# console app... I can connect to the database and i have verified the connection through the AS400 logs however I seem to run into the following error: 我正在努力使用C#控制台应用程序从AS400数据库返回结果集...我可以连接到数据库,我已经通过AS400日志验证了连接但是我似乎遇到了以下错误:
System.InvalidCastException was unhandled Message=The data type returned is currently not supported by the provider.
System.InvalidCastException未处理Message =提供程序当前不支持返回的数据类型。 Source=IBM.Data.DB2.iSeries StackTrace: at IBM.Data.DB2.iSeries.iDB2DbTypeUtility.MapSQLTypeToDCPCType(DcSqlTypes sqlType, Int32 colccsid, UInt32 length) at IBM.Data.DB2.iSeries.iDB2Command.setRowOfParameterData(MpDcData[]& dcDataRow) at IBM.Data.DB2.iSeries.iDB2Command.execute() at IBM.Data.DB2.iSeries.iDB2Command.ExecuteNonQuery() at GeacFutureDelivery.Program.Main(String[] args) in C:\\Users\\harlim\\documents\\visual studio 2010\\Projects\\GeacFutureDelivery\\GeacFutureDelivery\\Program.cs:line 40 at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx) at System.Threading.ExecutionContext.Run(Executi
Source = IBM.Data.DB2.iSeries StackTrace:位于IBM.Data.DB2.iSeries.iDB2Command.setRowOfParameterData(MpDcData []&的IBM.Data.DB2.iSeries.iDB2DbTypeUtility.MapSQLTypeToDCPCType(DcSqlTypes sqlType,Int32 colccsid,UInt32长度) dcDataRow)位于IBM.Data.DB2.iSeries.iDB2Command.execute()位于C:\\ Users \\ harlim \\中GeacFutureDelivery.Program.Main(String [] args)的IBM.Data.DB2.iSeries.iDB2Command.ExecuteNonQuery() documents \\ visual studio 2010 \\ Projects \\ GeacFutureDelivery \\ GeacFutureDelivery \\ Program.cs:System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly,String [] args)第40行,位于System.AppDomain.ExecuteAssembly(String assemblyFile,Evidence assemblySecurity,String [] args )System.Threading上System.Threading.ExecutionContext.Run(ExecutionContext executionContext,ContextCallback回调,对象状态,布尔ignoreSyncCtx)的System.Threading.ThreadHelper.ThreadStart_Context(对象状态)中的Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() .ExecutionContext.Run(Executi onContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart() InnerException:
System.Threading.ThreadHelper.ThreadStart()上的onContext executionContext,ContextCallback回调,对象状态InnerException:
My source is: 我的来源是:
var connectionString = "<Connection String>";
int startDate = 1120530;
int endDate = 1120602;
try
{
using (var connection = new iDB2Connection(connectionString))
{
connection.Open();
iDB2Transaction trans = connection.BeginTransaction();
iDB2Command command = connection.CreateCommand();
string query = "DRLOBJ01.GETORDPCD";
command.Transaction = trans;
command.CommandType = CommandType.StoredProcedure;
command.CommandText = query;
command.CommandTimeout = 0;
command.Parameters.Add("DTSTR", iDB2DbType.iDB2Integer).Value = startDate;
command.Parameters.Add("DTEND", iDB2DbType.iDB2Integer).Value = endDate;
command.Prepare();
using (iDB2DataReader reader = command.ExecuteReader())
{
int iCUSO51 = reader.GetOrdinal("CUSO51");
int iORDN51 = reader.GetOrdinal("ORDN51");
int iDTDR51 = reader.GetOrdinal("DTDR51");
int iOPST45 = reader.GetOrdinal("OPST45");
while (reader.Read())
{
if (!string.IsNullOrEmpty(reader.GetString(iCUSO51)))
{
Console.WriteLine((string)reader[iCUSO51]);
Console.WriteLine((string)reader[iORDN51]);
Console.WriteLine((string)reader[iDTDR51]);
Console.WriteLine((string)reader[iOPST45]);
}
}
}
}
}
catch (iDB2CommErrorException ex)
{
Console.WriteLine(ex.Message);
}
}
Any thoughts? 有什么想法吗?
If your value is a Byte[], I think you got some trouble with CCSID65535. 如果您的值是Byte [],我认为您在使用CCSID65535时遇到了一些问题。
If so, here is a code to resolve it :-) 如果是这样,这里有一个解决它的代码:-)
private DataTable parseCCSID65535(DataTable p_dt)
{
DataTable dt = new DataTable();
// Build a new DataTable
for (int i = 0; i < p_dt.Columns.Count; i++)
{
dt.Columns.Add(p_dt.Columns[i].Caption);
}
//loop through the rows
for (int r = 0; r < p_dt.Rows.Count; r++)
{
//create a new row
string[] row = new string[p_dt.Columns.Count];
//loop through all columns
for (int c = 0; c < p_dt.Columns.Count; c++)
{
if (p_dt.Rows[r][c].GetType() == typeof(System.Byte[]))
{
// if this value is CCSID65535, change it ;-)
iDB2CharBitData cbd = new iDB2CharBitData((Byte[])p_dt.Rows[r][c]);
row[c] = cbd.ToString(65535);
}
else
{
// else: go on.
row[c] = p_dt.Rows[r][c].ToString();
}
}
// passing to the new DataTable.
dt.Rows.Add(row);
}
return dt;
}
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