Add spaces to a string in c#

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Hi all

I am printing in a text file

C#

string per = dt.Rows[i][2].ToString();
int l = per.Length;
string len1 = per.Substring(0, 16);
string len2 = per.Substring(16);

this is my 2 strings.

problem is if the string "per" is less then 16 e.g. 12,
it's showing error.

So what i want to if the string is less then 16 then it will add remaining spaces to make it 16.
if it's more then 16 then nothing..

Please tell me how to do this..

Posted 21-Feb-14 0:25am

Snehasish_Nandy

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Rock (Multithreaded) 21-Feb-14 6:39am

Hi...Snehasish_Nandy.
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Windows 8 Style button control.

http://aruny408.blogspot.com/p/free-windows-8-style-button-control.html

2 solutions

Solution 1

Please check this out...

C#

string per = dt.Rows[i][2].ToString();
                if (per.Length >= 16)
                {
                    string len1 = per.Substring(0, 16);
                    Console.Write("len1: " + len1);
                }
                else
                {
                    string len2 = per.Substring(0, per.Length);
                    Console.Write("len2:" + len2);
                }

Posted 21-Feb-14 0:36am

Rock (Multithreaded)

Updated 21-Feb-14 0:37am

v2

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CHill60 · Accepted Answer · 2014-02-21T01:49:00

Solution 2

Well if you really want to add spaces to make up the length then you could do this ...

C#

// method 1 - pad right with spaces first
per = per.PadRight(16);
// using TrimEnd in the next line effectively implements your requirement "if it's more than 16 then nothing"
len1 = per.Substring(0, 16).TrimEnd();  
len2 = per.Substring(16).TrimEnd();

Or if you are just concerned about that error then I think this is better

C#

// method 2 - no spaces added at end, handles any length string including 0
string len1 = per.Substring(0, Math.Min(16, per.Length));
string len2 = per.Substring(Math.Min(16, per.Length));

Posted 21-Feb-14 1:49am

CHill60

Comments

[no name] 21-Feb-14 22:21pm

Thanks for the reply CHill60.
It worked..
but now i am thinking like assigning a starting and ending point for each column.
e.g i have 4 columns. Date, particular, debit, balance.
So like date should be from 0-10, then particular 12-40 like this..
please tell me how can i do this..

CHill60 22-Feb-14 7:47am

Have a look at this article Handling Fixed-width Flat Files with .NET Custom Attributes[^]. If that's not quite what you want then try this http://trelford.com/blog/post/fixed.aspx[^]. If you go to google then use "c# fixed width file" to get a good set of results. Give it a go and if you hit any problems come back and post a new question (that way more people will see it and possibly help)