c# 读取oracle clob字段,C#操作CLOB大对象的代码一例

代码如下：

string filename = dirPath + "告警经验库信息.txt";

OracleConnection ocon = new System.Data.OracleClient.OracleConnection("data source=orcl;user id=ifms;pwd=ifms;");

ocon.Open();

OracleCommand ocmd = new OracleCommand("select count(*) from alarmcause t where t.vendor='ZY0801' and (experience is null or dbms_lob.compare(experience, empty_clob()) = 0) and t.probablecause='" + zhCause + "'", ocon);

int count = int.Parse(ocmd.ExecuteScalar().ToString());

ocon.Close();

//http://www.jbxue.com

if (count > 0)

{

ocon.Open();

ocmd = new OracleCommand("update alarmcause set experience=:exper where vendor='ZY0801' and probablecause='" + zhCause + "'", ocon);

OracleParameter op = new OracleParameter("exper", OracleType.Clob);

op.Value = strhtml;

ocmd.Parameters.Add(op);

ocmd.ExecuteNonQuery();

ocon.Close();

}