如何解决Regex.Matches的问题？ [英] How to solve the problem of Regex.Matches ?

问题描述

请参阅以下代码：

 List< string> ListOfGlobalTables =  new  List< string>（）; 
  string  selectpart =   SELECT Summary_New.ServiceName AS'[Q1]。[ServiceName]' 
 
 
 ListOfGlobalTables.Add（ 摘要）; 
 ListOfGlobalTables.Add（  Summary_New）; 
 
  foreach （ string  item  in  ListOfGlobalTables）
 {
  string  tableNamePlusDot = item +  。; 
 
  int  count = Regex.Matches（selectpart，tableNamePlusDot）.Count; 
 
  //  只考虑应返回的数量 
} 

对于List中的第一项，以下代码将tableNamePlusDot作为Summary返回。

< pre lang =c＃> string tableNamePlusDot = item + 。

之后，对于以下代码，计数应返回0

  int  count = Regex.Matches（selectpart，tableNamePlusDot）.Count; 
 

但它返回1！

任何人都可以帮我解决这个问题吗？

解决方案

而不是添加'。'add

 '\。'

到模式

。正则表达式匹配任何字符。

如果你想将搜索限制为摘要加上一个点，那么：

  string  tableNamePlusDot = item +  @  \。; 

应该修复它。

Please see the following code:

List<string> ListOfGlobalTables = new List<string>();
string selectpart="SELECT Summary_New.ServiceName AS '[Q1].[ServiceName]'"


ListOfGlobalTables.Add("Summary");
ListOfGlobalTables.Add("Summary_New");

 foreach (string item in ListOfGlobalTables)
                {
                    string tableNamePlusDot = item + ".";

                    int count = Regex.Matches(selectpart, tableNamePlusDot).Count; 
                   
                  // just think what count should return
                  }

For the first item in the List, the following code return tableNamePlusDot as "Summary.".

string tableNamePlusDot = item + ".";

After that the count should return 0 for the following code

int count = Regex.Matches(selectpart, tableNamePlusDot).Count;

but it returns 1 !
Can anyone please help me to solve this problem ?

解决方案

instead of adding '.' add

'\.'

to the pattern

"." in a regex matched any character.
If you want to limit the search to "Summary" plus a dot, then:

string tableNamePlusDot = item + @"\.";

Should fix it.

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