使用字符串分隔逗号。使用LINQ加入

Question

I used string.Join in lambda expression to form comma seperated values

I achieved it using the following code:

    var viewData = queue.Select(items => new companyQueueWithSegInfo()
{
 segmentName = string.Join(",", items.Select(i => i.seginfo.Trim()));

                                  }).AsQueryable()

}

The output for this will be :

AB ,CD

But I need output as

AB, CD

I tried like this:

string.Join(" ,",items.Select(i => i.segminfo)).Replace(",", ", ").Replace(" ,","")

Can anyone help me with this? but it didn't work.

Answer 1

If seginfo is a string , how about Trim them first and then then join with ", " ?

string.Join(", ", items.Select(i => i.seginfo.Trim()));

Also you should check your item is null or not for prevent NRE like;

string.Join(", ", list.Where(s => s != null).Select(i => i.Trim()))

or can use IsNullOrEmpty as others mentioned.

Answer 2

You can use Trim() for removing all leading and trailing white-space characters. And then just change "," to ", " :

var result = string.Join(", ", items.Where(x => !String.IsNullOrEmpty(x))
                                   .Select(i => i.seginfo.Trim()));

Be sure to check if the string is empty or null also as I did.

Answer 3

Try this using Trim() ie, you need to join them with ", " and then use the Trim():

string.Join(", ",items.Select(i => i.seginfo.Trim()))

To handle NULL condition of string try this:

string.Join(", ", items.Where(x => !String.IsNullOrEmpty(x))
                      .Select(i => i.seginfo.Trim()));