DaniWeb Forum Index > Software Development > C#

How to append string in front

Please support our C# advertiser: Programming Forums - DaniWeb Sister Site

•

Join Date: Jan 2008

Posts: 14

Reputation: raj416 is an unknown quantity at this point

Solved Threads: 2

raj416

Offline

Newbie Poster

How to append string in front

Aug 12th, 2008

I have a string variable .. i need to append some value in front of this string ... i tried pad left function.. but it was not working

for example

string s= "sample"

now in want to insert "daniweb " , so my output of string s will be "daniweb sample"

•

Join Date: Nov 2007

Posts: 2,641

Reputation: Jx_Man is a glorious beacon of light

Solved Threads: 245

Jx_Man

Offline

Posting Maven

Re: How to append string in front

Aug 12th, 2008

See this Link

Last edited by Jx_Man; Aug 12th, 2008 at 4:12 am.

Never tried = Never Know
So, Please do something before post your thread.
* PM Asking will be ignored *

•

Join Date: Aug 2008

Posts: 1,162

Reputation: dickersonka will become famous soon enough

Solved Threads: 138

dickersonka dickersonka is offline

Offline

Veteran Poster

Re: How to append string in front

Aug 12th, 2008

Or you could just go the easy route

 Help with Code Tags 
 C# Syntax (Toggle Plain Text) 
string s= "sample";
s = "daniweb " + s;
string s= "sample";
s = "daniweb " + s;

Last edited by dickersonka; Aug 12th, 2008 at 12:37 pm.

•

Join Date: Jul 2008

Posts: 39

Reputation: nvmobius is an unknown quantity at this point

Solved Threads: 4

nvmobius

Offline

Light Poster

Re: How to append string in front

Aug 12th, 2008

•

Originally Posted by dickersonka

Or you could just go the easy route
Help with Code Tags

C# Syntax (Toggle Plain Text)
string s= "sample";
s = "daniweb " + s;
string s= "sample"; s = "daniweb " + s;

This is better, unless you do it often. Remeber each + used allocates and floats another copy of the string.

•

Join Date: Aug 2008

Posts: 1,162

Reputation: dickersonka will become famous soon enough

Solved Threads: 138

dickersonka dickersonka is offline

Offline

Veteran Poster

Re: How to append string in front

Aug 12th, 2008

Correct nvmobius, I'll add if you are doing this with more than just a simple example like that, might want to try this.

 Help with Code Tags 
 C# Syntax (Toggle Plain Text) 
  StringBuilder sb = new StringBuilder();
  sb.Append("sample");
  sb.Insert(0, "daniweb ");
  string s = sb.ToString();
  StringBuilder sb = new StringBuilder();
  sb.Append("sample");
  sb.Insert(0, "daniweb ");
  string s = sb.ToString();

•

Join Date: Jul 2008

Posts: 39

Reputation: nvmobius is an unknown quantity at this point

Solved Threads: 4

nvmobius

Offline

Light Poster

Re: How to append string in front

Aug 12th, 2008

•

Originally Posted by dickersonka

Correct nvmobius, I'll add if you are doing this with more than just a simple example like that, might want to try this.
Help with Code Tags

C# Syntax (Toggle Plain Text)
  StringBuilder sb = new StringBuilder();
  sb.Append("sample");
  sb.Insert(0, "daniweb ");
  string s = sb.ToString();
StringBuilder sb = new StringBuilder(); sb.Append("sample"); sb.Insert(0, "daniweb "); string s = sb.ToString();

The downside of StringBuilder (and secretly String.Format) is that the allocation/release cost is several times that of the base String class. I'll see if I can find the MS developers' post, but if I remember correctly appending 3 strings together is cheaper than allocating, and using a StringBuilder to do the same thing. 4 strings is where StringBuilder becomes cheaper (total clock cycles, including garbage collector time).