从文本文件读取特定的字符列

Question

Using c# If I had data that looks like this:

123456 CUSTOMER      ADDRESS CITY STATE
123457 CUSTOMER ABC  ADDRESS CITY STATE
123458 CUSTOMER 1234 ADDRESS CITY STATE

For each row, how can I read characters one through 1-6 if I know that is the customers ID and 8-20 if I know that's the customers name? I'm looking to then take the data (For each line) and create a new datarow in a datatable.

Here is the code for my datatable:

DataTable dt = new DataTable();

DataColumn CUST_ID = new DataColumn();
CUST_ID.DataType = Type.GetType("System.String");
CUST_ID.ColumnName = "CUST_ID";

DataColumn CUST_DESC = new DataColumn();
CUST_DESC.DataType = Type.GetType("System.String");
CUST_DESC.ColumnName = "CUST_DESC";

dt.Columns.Add(CUST_ID);
dt.Columns.Add(CUST_DESC);

Most of the finds searching on MSDN and here has to do with delimited files.

Just looking to get pointed in the right direction.

Answer 1

string.Substring(6)

string.Substring(6, 12)

Answer 2

Assuming you're reading from the text File f :

string[] inputs = File.ReadAllLines(f);
foreach (String line in inputs) {

        String custAdd = line.Substring(20,27);
        //and do whatever you want with that string

}