Question

How to insert a phone number into a table using asp.net?

string insertquery = 
    "insert customer (
        id, name, address, gender, DOB, contactno, email, userid, password)
    values
        (@custid, @custname, @custaddress, @gender, @custdob,
        @custcno, @custemail, @custuserid, @custpassword)";

Here custcno is the phone number.

 sc.Parameters.AddWithValue("@custcno",Convert.ToInt32(txtcustcno.Text));

While running I’m getting error Input string was not in a correct format.

in table contactno is varchar(50)

Answer 1

The code is trying to convert the telephone number string to a number here:

Convert.ToInt32(txtcustcno.Text)

So, if it contains any non-numeric characters like dashes of parentheses then it’ll throw an exception.

To just insert the string without first converting it, do this:

sc.Parameters.AddWithValue("@custcno", txtcustcno.Text);