My code is as below:
List<string> colorList = new List<string>();
....
sCombo = reader["Combo"].ToString();
colorList.Add(sCombo.ToString());
....
foreach (var Combo in colorList)
{
Response.Write(string.Join(",", Combo));
}
Output: D410D430D440D420
instead of D410,D430,D440,D420
What is the most simple way to convert the List<string>
into a comma-separated string?
EDIT #01
Your suggestion working, but I need this new output :
'D410','D430','D440','D420'
Because use this string
on sql query.
Thank you
I think this would be very handy
var colorList = new List<string>() { "D410", "D430", "D440", "D420" };
string commaSeparated = string.Join(",", colorList);
Console.WriteLine(commaSeparated);
or try solution based on Linq
Console.WriteLine(colorList.Select(s => s + ",").Aggregate((s, q) => s + q).TrimEnd(','));
The output
D410,D430,D440,D420
Edit
string result = string.Join(",", colorList.Select(e => "'" + e + "'"));
Console.WriteLine(result);
will give you
'D410','D430','D440','D420'
没有foreach
:
Response.Write(string.Join(",", colorList));
You need to output like this => 'D410','D430','D440','D420'
So try below,
string result = string.Join(",", colorList.Select(x => $"'{x}'"));
Response.Write(result);
What we did above?
Answer: First we flatten each item in your list with a single quoted ( ''
) surrounding string and then we just pass this newly generated flatten result to join method of string with a comma ( ,
) to get your desired output.
Output: (From Debugger)
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