无法使用正则表达式匹配相同模式的两次出现

时间:2013-08-23 23:03:45

标签: c# regex tsql

我有一个SQL查询作为字符串,我正在尝试使用正则表达式进行查找和替换。

var s = "SELECT ([Document].[ArtifactID]) FROM [Document]
        (NOLOCK) WHERE [Document].[AccessControlListID_D] 
        IN (1) AND ((NOT EXISTS(SELECT CodeArtifactID 
        FROM CodeArtifact (NOLOCK) WHERE AssociatedArtifactID = 
        [Document].[ArtifactID] AND CodeArtifact.CodeTypeID = 1000112))) ";
//line breaks added for readability

为了使查询起作用,我需要指定[Document]和CodeArtifact的模式。我有:

var pattern = "FROM\\s(?<table>\\S+)";
var replacePattern = "FROM EDDSDBO.${table}";

var v = Regex.Replace(s, pattern, replacePattern);
System.Console.WriteLine(v);

但是我回来的字符串看起来像是:

SELECT ([Document].[ArtifactID]) 
FROM [Document] (NOLOCK) 
WHERE [Document].[AccessControlListID_D] IN (1) AND 
((NOT EXISTS(SELECT CodeArtifactID 
             FROM EDDSDBO.CodeArtifact (NOLOCK) 
             WHERE AssociatedArtifactID = [Document].[ArtifactID] AND CodeArtifact.CodeTypeID = 1000112))) 

CodeArtifact已被替换,但[Document]不是。我肯定错过了什么。有什么想法吗?

1 个答案:

答案 0 :(得分:1)

您的代码适合我。我能想到的唯一问题是源代码中FROM[DOCUMENT]之间的空格不止一个,在这种情况下,您可以删除空格或使用

FROM\\s+(?<table>\\S+)