我的正则表达式代码不起作用我得到如下结果。任何想法
我的代码错误：
Getting the sentences without values like this one: CREATE SEQUENCE "" MINVALUE MAXVALUE INCREMENT BY START WITH CACHE NOORDER NOCYCLE;
改句的条件
- 如果 MINVALUE 在句子中具有正值，则使开头的值与 MINVALUE 相同...
- 如果 MINVALUE 在句子中具有负值，则使开始的值与 MAXVALUE 相同
在我的数据库中，我有 3 句话需要更改...
CREATE SEQUENCE "MY_SEQUENCE" MINVALUE -8 MAXVALUE 999 INCREMENT BY 1 START WITH 250 CACHE 50 NOORDER NOCYCLE;
CREATE SEQUENCE "_SEQUENCE" MINVALUE 151 MAXVALUE 500 INCREMENT BY 4 START WITH 160 CACHE 30 NOORDER NOCYCLE;
结果应该如下所示
CREATE SEQUENCE "MY_SEQUENCE" MINVALUE -8 MAXVALUE 999 INCREMENT BY 1 START WITH 999 CACHE 50 NOORDER NOCYCLE;
CREATE SEQUENCE "_SEQUENCE" MINVALUE 151 MAXVALUE 500 INCREMENT BY 4 START WITH 151 CACHE 30 NOORDER NOCYCLE;
我的代码：
string sentence = "";
string formatprototype = "";
string output = "";
using (OracleConnection conn1 = MyConnection.GetSourceConnection())
{
conn1.Open();
using (OracleCommand crtCommand = new OracleCommand(@"MyCommand", conn1))
{
sentence = crtCommand.ExecuteScalar().ToString();
string pattern = @".*[ ]+?[\""]{1}(?<String>[a-zA-Z0-9_]*)[\""]{1}[ ]+?MINVALUE[ ]*(?<MinValue>[-?\d]*)[ ]*MAXVALUE[ ]*(?<MaxValue>[\d]*)[ ]+?[INCREMENT]*[ ]+?[BY]*[ ]+?(?<IncrementBy>[\d]*)[ ]+?[START]*[ ]+?[WITH]*[ ]+?(?<StartWith>[\d]*)[ ]+?[CACHE]*[ ]+?(?<Cache>[\d]*)\s+?";
Regex regex = new Regex(pattern);
Match match = regex.Match(sentence);
Group @string = match.Groups[1];
Group minvalue = match.Groups[2];
Group maxvalue = match.Groups[3];
Group incrementby = match.Groups[4];
Group startswith = match.Groups[5];
Group cache = match.Groups[6];
formatprototype = @"CREATE SEQUENCE ""{0}"" MINVALUE {1} MAXVALUE {2} INCREMENT BY {3} START WITH {4} CACHE {5} NOORDER NOCYCLE";
if (minvalue.Value.StartsWith("-"))
{
output = string.Format(formatprototype, @string, minvalue, maxvalue, incrementby, maxvalue, cache);
}
else if (!minvalue.Value.StartsWith("-"))
{
output = string.Format(formatprototype, @string, minvalue, maxvalue, incrementby, minvalue, cache);
}
MessageBox.Show(output);
}
}
}