【发布时间】：2018-10-04 23:30:34
【问题描述】：
我已经用 SELECT 语句做了很多次，没有任何问题。我也明白 DML PL SQL 语句在“某些”实例中不允许绑定参数，但我已经让 UPDATE 语句工作。但它绝不是组成。我不知道我的陈述还能做什么。下面我采用了处理 UPDATE 语句的部分代码。我基本上是将参数传递给我的语句（特别是 sampleID 和 testID 变量都被声明为整数），但语句在变量的位置包含零。这意味着它无法识别已分配给 sampleID 和 testID 变量的值。我不明白我在这里做错了什么。第一个更新命令 (ucommand) 有效，但后两个无效。我在这里迷路了。
if(!row["field_result"].ToString().Equals(""))
{
//Build SQL commands to address the field result
string ucommand = "UPDATE CC_MSD_LIMS_STAGING SET FIELD_RESULT = '" + @locfield + "', CREATEDDT = SYSDATE"
+ " WHERE MONITORING_ID = " + @locmon_ID + " AND IPACS_SAMPLE_ID = " + @locipacs_ID + " AND FACILITY_ID = "
+ @locfacil_ID + " AND POLLUTANT = '" + @locpoll + "'";
string idcmd = "SELECT SAMPLEID FROM LIM_SAMPLE WHERE SAMPLENUMBER = (SELECT PRIM_SAM_KEY FROM CC_MSD_LIMS_STAGING "
+ "WHERE MONITORING_ID = " + @locmon_ID + " AND IPACS_SAMPLE_ID = " + @locipacs_ID + " AND FACILITY_ID = "
+ @locfacil_ID + " AND POLLUTANT = '" + @locpoll + "')";
string testcmd = "SELECT TESTID FROM LIM_TESTGROUPTESTS WHERE TESTGROUPID = (SELECT TESTGROUPID FROM LIM_TESTGROUP WHERE "
+ "TESTGROUPNAME = '" + @locpoll + "' AND ACTIVE = 1 AND PUBLISHED = 1)";
string upd1cmd = "UPDATE LIM_SAMPLETESTRUNRESULT SET SAMPLETESTRUNRESULTRAW = '" + @locfield + "', SAMPLETESTRUNRESULTCALC "
+ "= '" + @locfield + "', SAMPLETESTRUNRESULTREPORT = '" + @locfield + "', SAMPLETESTRUNRESULTSTATUS = 3, EDITEDDT "
+ "= SYSDATE, EDITEDBY = 128 WHERE SAMPLEID = " + @sampleID + " AND TESTID = " + @testID;
string upd2cmd = "UPDATE LIM_SAMPLETESTRESULTPROCESSES SET PROCESSSTATUS = 3.3, PROCESSCOMPLETEDT = SYSDATE, PROCESSCOMPLETEBY "
+ "= 128 WHERE SAMPLEID = " + @sampleID + " AND TESTID = " + @testID;
//Execute commands
try
{
using (OracleCommand cmd = new OracleCommand(ucommand, conn))
{
cmd.Parameters.Add("@locmon_ID", locmon_ID);
cmd.Parameters.Add("@locfacil_ID", locfacil_ID);
cmd.Parameters.Add("@locipacs_ID", locipacs_ID);
cmd.Parameters.Add("@locpoll", locpoll);
cmd.Parameters.Add("@locfield", locfield);
cmd.ExecuteNonQuery();
cmd.CommandText = "COMMIT WORK";
cmd.ExecuteNonQuery();
cmd.CommandText = idcmd;
sampleID = int.Parse(cmd.ExecuteScalar().ToString());
cmd.CommandText = testcmd;
testID = int.Parse(cmd.ExecuteScalar().ToString());
}
using (OracleCommand cmd1 = new OracleCommand(upd1cmd, conn))
{
cmd1.Parameters.Add("@sampleID", sampleID);
cmd1.Parameters.Add("@testID", testID);
cmd1.CommandText = upd1cmd;
cmd1.ExecuteNonQuery();
cmd1.CommandText = "COMMIT WORK";
cmd1.ExecuteNonQuery();
cmd1.CommandText = upd2cmd;
cmd1.ExecuteNonQuery();
cmd1.CommandText = "COMMIT WORK";
cmd1.ExecuteNonQuery();
}
}
catch (Exception f)
{
//Log.Error("Problems with the field results.");
}
}
【问题讨论】：
-
去掉参数占位符周围的引号
-
string ucommand = "UPDATE CC_MSD_LIMS_STAGING SET FIELD_RESULT = @locfield, CREATEDDT = SYSDATE WHERE MONITORING_ID = @locmon_ID AND IPACS_SAMPLE_ID = @locipacs_ID AND FACILITY_ID = @locfacil_ID + AND POLLUTANT = @locpoll"; -
如果我删除引号，我会收到错误“无法将 int 转换为字符串”。 sampleID 和 testID 参数都是整数。 u 命令有效。是 updcmd1 和 updcmd2 不起作用。
-
对不起，我没有关注。除了 sampleID 和 testID 之外，所有参数都传递了各自的值。这两个也在字符串语句 updcmd1 和 updcmd2 中。所以我不确定你的最后一句话是什么意思@Steve
-
我已经删除了我之前的评论。但是，我不明白您从哪里得到该错误消息。当您编写参数化查询时，您不会在命令文本内插入字段值。您只需在命令文本中放置参数的占位符。它们只是文本而不是变量。然后每个命名占位符@something 都应该将其参数值添加到命令参数集合中。并且每个参数还应该指定其类型。使用 cmd.Parameters.Add("@name", OracleDbType.XXXX).Value = value 顺便说一下oracle中参数的前缀是
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