I have a select statement that returns data to a DataTable. About 3-5 columns and 5-10 rows. I'm trying to collect all the data from the "Email" Column and add it to a single-line string.

Result:

[email protected];[email protected];[email protected];[email protected]

CodePudding user response：

Solution 1

1. Iterate each DataRow and get the value from DataColumn.

2. Add value into array/list.

3. Convert array/list to string with String.Join() with ; as separator.

using System.Collections.Generic;

List<string> emails = new List<string>();

foreach (DataRow row in dt.Rows)
{
    emails.Add(row["Email"].ToString());
}

string result = String.Join(";", emails);

Solution 2

1. Working with System.Linq to get the email as List<string>.

2. Convert array/list to string with String.Join() with ; as separator.

using System.Linq;

string result = String.Join(";", dt.AsEnumerable()
                                      .Select(x => x["Email"].ToString())
                                      .ToList());

Sample .NET Fiddle