string - Need to cut a string(Table Name) from Query in c#

Question

My String/Query looks like this

1. insert into Employee Values(1,2,'xxx');
2. update Employee2 set col1='xxx' where col2='yyy';
3. select * from Employee3;

I need to take/have TableName alone. Table name won't be constant it will be differed(Employee,Employee2,Employee3) according to DB. I'm new to C# please help me. Thanks in advance.

Answer 1

要从查询中获取表的名称（或者在本例中为名为 'sql' 的字符串），请尝试以下操作：

        string sql = "select * from table ";
        int index1 = 0;
        int index2 = 0;
        int currentIndex = 0;
        int numSpaces = 0;
        char[] chArray = sql.ToCharArray();
        foreach (char c in chArray)
        {
            if (c == ' ')
            {
                numSpaces++;
                if (numSpaces == 3)
                    index1 = currentIndex;
                if (numSpaces == 4)
                {
                    index2 = currentIndex;
                    break;
                }
            }
            currentIndex++;
        }
        int length = index2 - index1;
        string tableName = sql.Substring(index1, length);
        MessageBox.Show(tableName);

警告 - 此解决方案基于查找第 3 和第 4 个空格字符之间的单词。这限制了您拥有一个非常可预测的查询结构 - 更复杂的查询可能不适用于此解决方案。您的查询结构需要是：

"select column_name1,column_name2,column_name3 from table "

您的查询在列之间不能有空格，并且最后也必须有空格。抱歉有限制，但这是我能想到的最好的；）