c# 调用oracle function,C#调用Oracle存储过程的方法
GetReviewTask
public string GetReviewTask(GetReviewTaskInput input)
{
/*
* 试过三种写法都不对，暂时找不出是什么原因，改成拼Sql；
*
OracleParameter[] sqlParameters =
{
new OracleParameter (":UserId", input.UserId),
new OracleParameter (":ExamCourseId", input.ExamCourseId),
new OracleParameter (":QuestionsId", input.QuestionsId),
new OracleParameter (":TaskType", input.TaskType)
};
*/
/*
DbParameter[] sqlParameters =
{
new OracleParameter { ParameterName = ":UserId", Value = input.UserId },
new OracleParameter { ParameterName = ":ExamCourseId", Value = input.ExamCourseId },
new OracleParameter { ParameterName = ":QuestionsId", Value = input.QuestionsId },
new OracleParameter { ParameterName = ":TaskType", Value = input.TaskType }
};
*/
/*
var pars = new OracleParameter[4];
pars[0] = new OracleParameter(":UserId", input.UserId);
pars[1] = new OracleParameter(":ExamCourseId", input.ExamCourseId);
pars[2] = new OracleParameter(":QuestionsId", input.QuestionsId);
pars[3] = new OracleParameter(":TaskType", input.TaskType);
*/
var outputParameter = new OracleParameter
{
ParameterName = "CUR",
OracleDbType = OracleDbType.RefCursor,
Direction = ParameterDirection.Output
};
DbParameter[] parameters = {
new OracleParameter("P_USER_ID", input.UserId),
new OracleParameter("P_EXAM_COURSE_ID", input.ExamCourseId),
new OracleParameter("P_QUESTIONS_ID", input.QuestionsId),
new OracleParameter("P_TASK_TYPE", input.TaskType),
outputParameter
};
/*
var sqlQuery = $@" SELECT T1.TASK_ID TaskId
FROM T_RVW_REVIEW_WORK T1
INNER JOIN T_RVW_QUESTIONS_PERMISSION T2
ON T1.EXAM_COURSE_ID = T2.EXAM_COURSE_ID AND T1.QUESTIONS_ID = T2.QUESTIONS_ID
WHERE T1.QUESTIONS_ID = '{input.QuestionsId}'
AND T1.EXAM_COURSE_ID = '{input.ExamCourseId}'
AND T1.TASK_TYPE = {input.TaskType}
AND T1.USER_ID IS NULL
AND T2.USER_ID = '{input.UserId}'
AND T1.IS_DONE = 0
AND ROWNUM = 1
FOR UPDATE SKIP LOCKED";
*/
var result = "";
var dt = ExecuteProc("USP_RVW_GET_REVIEW_TASK", parameters);
result = dt?.Rows.Count == 1 ? dt.Rows[0][0].ToString() : "";
dt?.Dispose();
return result;
}
ExecuteProc
private DataTable ExecuteProc(string procName, params DbParameter[] parms)
{
using (var conn = new OracleConnection(Context.Database.Connection.ConnectionString))
{
var outParms = parms.Where(p => p.Direction == System.Data.ParameterDirection.Output || p.Direction == System.Data.ParameterDirection.ReturnValue).ToList();
var command = new OracleCommand(procName)
{
Connection = conn,
CommandType = CommandType.StoredProcedure
};
command.Parameters.AddRange(parms);
conn.Open();
command.ExecuteNonQuery();
var ds = new DataSet();
IDbDataAdapter da = new OracleDataAdapter(command);
da.Fill(ds);
command.Parameters.Clear();
command.Dispose();
conn.Close();
return ds.Tables[0];
}
}
USP_RVW_GET_REVIEW_TASK
CREATE OR REPLACE PROCEDURE USP_RVW_GET_REVIEW_TASK
( P_USER_ID VARCHAR2,
P_EXAM_COURSE_ID VARCHAR2,
P_QUESTIONS_ID VARCHAR2,
P_TASK_TYPE INT,
CUR OUT SYS_REFCURSOR )
IS
V_TASK_ID VARCHAR2(50);
BEGIN
BEGIN
SELECT T1.TASK_ID
INTO V_TASK_ID
FROM T_RVW_REVIEW_WORK T1
INNER JOIN T_RVW_QUESTIONS_PERMISSION T2
ON T1.EXAM_COURSE_ID = T2.EXAM_COURSE_ID
AND T1.QUESTIONS_ID = T2.QUESTIONS_ID
WHERE T1.QUESTIONS_ID = P_QUESTIONS_ID
AND T1.EXAM_COURSE_ID = P_EXAM_COURSE_ID
AND T1.TASK_TYPE = P_TASK_TYPE
AND T1.USER_ID IS NULL
AND T2.USER_ID = P_USER_ID
AND T1.IS_DONE = 0
AND ROWNUM = 1;
DBMS_OUTPUT.PUT_LINE('TaskId:'||V_TASK_ID);
UPDATE T_RVW_REVIEW_WORK
SET USER_ID = P_USER_ID
WHERE TASK_ID = V_TASK_ID AND IS_DONE = 0;
COMMIT;
EXCEPTION
WHEN NO_DATA_FOUND THEN
DBMS_OUTPUT.PUT_LINE('NO_DATA_FOUND');
END;
OPEN CUR FOR
SELECT TASK_ID
FROM T_RVW_REVIEW_WORK
WHERE TASK_ID = V_TASK_ID;
END;