Question

Please look at what is wrong? I want to convert datarow to a string list.

 public List<string> GetEmailList()
    {
        // get DataTable dt from somewhere.
        List<DataRow> drlist = dt.AsEnumerable().ToList();
        List<string> sEmail = new List<string>();
        foreach (object str in drlist)
        {
            sEmail.Add(str.ToString()); // exception
        }
        return sEmail; // Ultimately to get a string list.
    }

Thanks for help.

Answer 1

There’s several problems here, but the biggest one is that you’re trying to turn an entire row into a string, when really you should be trying to turn just a single cell into a string. You need to reference the first column of that DataRow, which you can do with brackets (like an array).

Try something like this instead:

public List<string> GetEmailList()
{
    // get DataTable dt from somewhere.
    List<string> sEmail = new List<string>();
    foreach (DataRow row in dt.Rows)
    {
        sEmail.Add(row[0].ToString());
    }
    return sEmail; // Ultimately to get a string list.
}