使用*进行过滤,这将限制以Null开头的所有值? [英] Filter with * which will restrain all values that starts with Null?

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本文介绍了使用*进行过滤,这将限制以Null开头的所有值?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有以下代码扩展了我的过滤器功能,允许我搜索多个Zip代码。防爆。 (1254,125,145,1455)







  if (Post_Code_PAR!=  null 
{
String [] PostCode_Array = Post_Code_PAR.Split(' ,');
query = 来自 p 查询其中 PostCode_Array.Contains(p.Post_Code)选择 p;
}







我想扩展这段代码,如果我给它类似于(0 *)的东西,它会找到以0开头的邮政编码。如果我给它123 *,它会给我所有以123开头的邮政编码。非常感谢。



也试过这个:



  String  [] PostCode_Array = 来自 p   Post_Code_PAR.Split('' ,'选择 字符串 .Format (  ^ {0} $,p.Replace(  @  \ d)); 
query = 来自 p 查询其中 PostCode_Array.Any(pattern = > Regex.IsMatch(p.Post_Code,pattern)) select p;





但我收到此错误:

错误7类型'System.Collections.Generic .IEnumerable< string> 不能隐式转换为'string []'。已经存在显式转换。(也许你错过了演员。)

解决方案

,p.Replace( @ \d));
query = 来自 p 查询其中 PostCode_Array.Any(pattern = > Regex.IsMatch(p.Post_Code,pattern)) select p;





但我收到此错误:

错误7类型'System.Collections.Generic .IEnumerable< string> 不能隐式转换为'string []'。已经存在显式转换。(也许你错过了演员。)


怎么样:

 字符串 [] PostCode_Array =  来自 p   Post_Code_PAR.Split(' ,'
选择 字符串 .Format( ^ {0}


,p.Replace( @ \ d ))
.ToArray();




I have the following code which extends my filter functionality to allow me to search for more than one Zip-code. Ex. (1254,125,145,1455)



if (Post_Code_PAR != null)
{
    String[] PostCode_Array = Post_Code_PAR.Split(',');
    query = from p in query where PostCode_Array.Contains(p.Post_Code) select p;
}




I want to extend this code in a way that if I give it something like (0*) it will find zip codes which starts with 0. If I give it 123* it will give me all zip codes which starts with 123. Thanks a lot.

also tried this:

String[] PostCode_Array = from p in Post_Code_PAR.Split(',') select String.Format("^{0}$", p.Replace("", @"\d"));
query = from p in query where PostCode_Array.Any(pattern => Regex.IsMatch(p.Post_Code, pattern)) select p;



But Iam getting this error:
Error 7 The type 'System.Collections.Generic.IEnumerable <string> "can not be implicitly converted to' string [] '. There is already an explicit conversion exists. (Maybe you missing a cast.)

解决方案

", p.Replace("", @"\d")); query = from p in query where PostCode_Array.Any(pattern => Regex.IsMatch(p.Post_Code, pattern)) select p;



But Iam getting this error:
Error 7 The type 'System.Collections.Generic.IEnumerable <string> "can not be implicitly converted to' string [] '. There is already an explicit conversion exists. (Maybe you missing a cast.)


What about:

String[] PostCode_Array = (from p in Post_Code_PAR.Split(',')
                          select String.Format("^{0}


", p.Replace("", @"\d"))) .ToArray();


?


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