Adding double quotes to text

Question

User-73514677 posted

Hi.

I am reading the contents of dataset and passing it to a textfile. I have used the below code, which works.

foreach (DataRow row in ds.Tables[0].Rows)
                        {
                            object[] array = row.ItemArray;
                            for (int i = 0; i < array.Length - 1; i++)
                            {
                                sw.Write(array[i].ToString() + "~");
                            }
                            sw.WriteLine(array[array.Length - 1].ToString());
                        }

If the datarow contins text/special characters, i need to put the data in double quotes, if the datarow contains only numbers, then double quotes are not required.

How to achive this?

Thanks

Answer 1

User303363814 posted

You can check if a string is a number with TryParse.  You could make a little method

bool isNumber(string inp) {
   long dummy;
   return long.TryParse(inp, out dummy);
}

Answer 2

User1535942433 posted

Hi venkatzeus,

As far as I think,you could convert.ToString if the  data is text/special characters.

Just like this:

if(example is string)
{
string x = (Convert.ToString("\"") + example) + "\"";
}

Best regards,

Yijing Sun

Answer 3

User-821857111 posted

You can check if a string is a number with TryParse.  You could make a little method

bool isNumber(string inp) {
   long dummy;
   return long.TryParse(inp, out dummy);
}

You can reduce that using a discard and an expression bodied member:

bool isNumber(string inp) => long.TryParse(inp, out _);