C# 如何使用OracleClientFactory在XmlType中插入4000多个字符?
我正在尝试将一块大于4000个字符的Xml插入到Oracle表中的XmlType字段中 最初,我的代码是这样工作的:C# 如何使用OracleClientFactory在XmlType中插入4000多个字符?,c#,oracle,C#,Oracle,我正在尝试将一块大于4000个字符的Xml插入到Oracle表中的XmlType字段中 最初,我的代码是这样工作的: DbParameter parameter = new DbParameter; parameter = clientFactory.CreateParameter(":p_xml_data", DbType.AnsiString, messageToLog.Length, ParameterDirection.Input, messageToLog); 但是,当我开始尝试插入
DbParameter parameter = new DbParameter;
parameter = clientFactory.CreateParameter(":p_xml_data", DbType.AnsiString, messageToLog.Length, ParameterDirection.Input, messageToLog);
但是,当我开始尝试插入大于4000字节的Xml块时,我得到了:
ORA-01461: can bind a LONG value only for insert into a LONG column
这和这个问题是同一个问题,但是我没有DbType.Clob作为选项(它不存在)
接下来,我尝试将类型更改为DbType.Object,希望它能将其转换为所需的任何类型,但我收到了以下消息:
Cannot bind type System.String as Blob
然后我尝试使用DbType.XML,修改了代码以将messageToLog移动到SqlXml对象中:
SqlXml sx;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.LoadXml(messageToLog);
using (XmlNodeReader xnr = new XmlNodeReader(xmlDoc))
{
sx = new SqlXml(xnr);
}
并相应地更改了参数:
parameter = providerFactory.CreateParameter(":p_xml_data", DbType.Xml, messageToLog.Length, ParameterDirection.Input, sx);
现在我得到:
Value is not valid for DbType: Xml
实际上,我只想在我的专栏中存储更大的XML块 您应该为ODP.NET库指定,特别是设置XMLType信息。OracleXmlType
类及其用法也分别列出。我自己也不是真正的C#开发者,所以我不能给你确切的代码。四处搜索,但我自己没有尝试过:
OracleCommand orainscmd = new OracleCommand("INSERT INTO employees(empinfo) " +
" VALUES (:empinfoxml)", con);
orainscmd.Parameters.Add(":empinfoxml", OracleDbType.XmlType);
OracleXmlType xmlinfo = new OracleXmlType(con,doc);
orainscmd.Parameters[0].Value=xmlinfo;
orainscmd.ExecuteNonQuery();
按如下方式绑定:.OracleDbType=OracleDbType.XmlType .DBType=DBType.Xml不起作用,将引发运行时错误,因为枚举值超出范围 见下文:
public void insertSimRun(OracleConnection conn, SliceDataExchange.ServiceReference1.SimulationRun simRun)
{
string sqlInsert = "INSERT INTO slice_sim (runid, first_int_start, simulation_run) ";
sqlInsert += "values (:p_runid, :p_interval_start, :p_simxml)";
OracleCommand cmdInsertSR = new OracleCommand();
cmdInsertSR.CommandText = sqlInsert;
cmdInsertSR.Connection = conn;
OracleParameter runID = new OracleParameter();
runID.DbType = DbType.Int32;
runID.Value = simRun.RunId;
runID.ParameterName = "p_runid";
OracleParameter first_interval_start = new OracleParameter();
first_interval_start.DbType = DbType.DateTime;
first_interval_start.Value = simRun.FirstIntervalStartUtc;
first_interval_start.ParameterName = "p_interval_start";
var serializer = new XmlSerializer(typeof(SliceDataExchange.ServiceReference1.SimulationRun));
StringWriter writer = new StringWriter();
//System.Xml.XmlDocument xdoc = new System.Xml.XmlDocument();
serializer.Serialize(writer,simRun);
//xdoc.LoadXml(writer.ToString());
OracleParameter simRunXML = new OracleParameter();
simRunXML.DbType = DbType.String;
simRunXML.ParameterName = "p_simxml";
simRunXML.Value = writer.ToString();
simRunXML.OracleDbType = OracleDbType.XmlType;
cmdInsertSR.Parameters.Add(runID);
cmdInsertSR.Parameters.Add(first_interval_start);
cmdInsertSR.Parameters.Add(simRunXML);
cmdInsertSR.ExecuteNonQuery();
cmdInsertSR.Dispose();
}