Question

嘿所有我正在寻找一种提取SQL查询字符串部分的简洁方法。

我的意思是：

说我有一个类似的查询：

https://myhost.com/cart/success?Authority=000000000000000000000000000000074139&Status=OK

我正在寻找将它们分成各自的部分（使用Dictionary作为存储每个值的两种方式）：

SELECT 
    poc, event, network, vendor 
FROM 
    bLine 
WHERE 
    network = 'something' 
AND 
    event = 'simple' 
OR 
    event != 'hard' 
ORDER BY 
    poc ASC

有人碰巧有类似的东西吗？我在SO上尝试了THIS示例，因为它似乎是我想要做的，但代码似乎不起作用：

有错误说：

错误CS0117'TokenInfo'不包含'Start'的定义

错误CS0117'TokenInfo'不包含'End'的定义

错误CS0117'TokenInfo'不包含'IsPairMatch'的定义

ETC等......

更新

似乎这个SO示例HERE完成了我需要它做的事情并且没有错误！：）

Answer 1

如果你有一个固定的字符串，你可以使用这样的东西。这是我试图解决问题我可以说这不是最有效或最先进的方法，但它是一种方式这样做。

        string[] Params = { "SELECT", "FROM", "WHERE", "AND", "OR", "ORDER BY" };
        Dictionary<string, string> sqlSource = new Dictionary<string, string>();
        string sqlString = "SELECT poc, event, network, vendor FROM bLine WHERE network = 'something'";
        int i, j;

        //iterate through all the items from Params array
        for (i = 0; i < Params.Length; i++)
        {

            string result = "";

            //take next element from Params array for SELECT next will be FROM
            for (j = i + 1; j < Params.Length; j++)
            {
                int ab = sqlString.IndexOf(Params[j]);
                //Get the substring between SELECT and FROM
                if (ab > 0)
                {
                    int pFrom = sqlString.IndexOf(Params[i]) + Params[i].Length;
                    int pTo = sqlString.LastIndexOf(Params[j]);
                    result = sqlString.Substring(pFrom, (pTo - pFrom));
                }


                //if there is a string then break the loop  
                if (result != "")
                {
                    sqlSource.Add(Params[i], result);
                    break;
                }
            }

            //if result is empty which is possible after FROM clause if there are no WHERE/AND/OR/ORDER BY then get substring between FROM and end of string
            if (result == "")
            {
                int pFrom = sqlString.IndexOf(Params[i]) + Params[i].Length;
                int pTo = sqlString.Length;
                result = sqlString.Substring(pFrom, (pTo - pFrom));
                sqlSource.Add(Params[i], result);
                break;
            }

        }

c＃从字符串中提取sql查询节

1 个答案: