从对象数组中加入唯一字符串

我有一个包含字符串的对象数组。从对象数组中加入唯一字符串

var values = new object[5]; 
values[0] = "PIZZA HUT"; 
values[1] = "ISLAMABAD"; 
values[2] = "ISLAMABAD"; 
values[3] = "PAKISTAN"; 
values[4] = "PAKISTAN";

我想从数组的独特元素的字符串，,加入也需要检查，如果字符串isNullOrWhiteSpace;

PIZZA HUT, ISLAMABAD, PAKISTAN.

目前我正在做以下工作。但是你可以看到它需要在if语句中进行很多检查。我在想，如果有使用LINQ

string featureName = values[0] as string; 
string adminboundry4 = values[1] as string; 
string adminboundry3 = values[2] as string; 
string adminboundry2 = values[3] as string; 
string adminboundry1 = values[4] as string; 


if (!string.IsNullOrWhiteSpace(adminboundry4) 
    && adminboundry4 != adminboundry1 
    && adminboundry4 != adminboundry2 
    && adminboundry4 != adminboundry3) //want to get rid of these checks 
       featureName += "," + adminboundry4; 

if (!string.IsNullOrWhiteSpace(adminboundry3)) //Not checking for duplicate here just for this question 
       featureName += "," + adminboundry3; 

if (!string.IsNullOrWhiteSpace(adminboundry2)) //Not checking for duplicate here just for this question 
       featureName += "," + adminboundry2; 

if (!string.IsNullOrWhiteSpace(adminboundry1)) //Not checking for duplicate here just for this question 
       featureName += "," + adminboundry1;

featureName一种更好的方式包含PIZZA HUT, ISLAMABAD, PAKISTAN, PAKISTAN

来源

2012-08-31 Bilal Hashmi

我是这么希望尽量减少 –

您可以使用string.Join()方法从你的对象数组中获得不同的数组元素。

试试这个：

var Result = string.Join(",", values.Cast<string>() 
           .Where(c => !string.IsNullOrWhiteSpace(c)) 
           .Distinct());

来源

2012-08-31 11:48:31 Habib

那是什么我正在寻找，让我试试 –

+1唯一的答案（迄今为止），包括'IsNullOrWhiteSpace'检查。 – Laoujin

thx it worked great –

是的，你可以使用LINQ：

var featureName = String.Join(
    ",", 
    values 
    .Cast<String>() 
    .Where(s => !String.IsNullOrWhiteSpace(s)) 
    .Distinct() 
);

来源

2012-08-31 11:48:17

我还需要检查的空白或空字符串 –

String.Join(",",values.ToList().Distinct(str=>str))

来源

2012-08-31 11:48:30 J0HN

我还需要检查的空白或空字符串 –

String.Join(",", values.Distinct().Where(s=>!s.ISNullOrWhiteSpace()))

来源

2012-08-31 11:50:55

从对象数组中加入唯一字符串

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