?
Solved

c# replace double quotes

Posted on 2008-10-18
9
Medium Priority
?
5,417 Views
Last Modified: 2011-09-27
I searched hundreds of entries and tried tons of examples - I cannot find how to replace double quotes so my sql insert will run.
This runs for single quotes:
memberID = memberID.Replace("'","''");
so I need the same thing for double quotes.

Also, does a replace work on all the characters in the string or just once?
0
Comment
Question by:dcass
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
9 Comments
 
LVL 55

Accepted Solution

by:
Jaime Olivares earned 1000 total points
ID: 22750737
To replace double quotes:

memberID = memberID.Replace("\"","other");

Replace method will replace all ocurrences
0
 

Author Comment

by:dcass
ID: 22750764
Will this show the double quotes back in the text like the single quote solution will?
0
 

Author Comment

by:dcass
ID: 22750774
What other characters will interfere with an insert?
How about ampersand?
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 

Expert Comment

by:PedroBuhigas
ID: 22750781
I think what you're after is:
memberID = memberID.Replace("\"\"","other");
0
 
LVL 55

Expert Comment

by:Jaime Olivares
ID: 22750785
I think you just have to worry about the single quote, not double quote or other.
I use to replace the single quote with a tick (`):

memberID = memberID.Replace("'","`");
0
 
LVL 55

Expert Comment

by:Jaime Olivares
ID: 22750801
but if you want to avoid to use all these, better you use parameters instead.
have a look to:
http://www.codeproject.com/KB/database/SqlInjectionAttacks.aspx
read "Parameterised Queries" section.
0
 
LVL 6

Expert Comment

by:carlsiy
ID: 22751204
why not use....
memberID=@memberID
0
 
LVL 23

Assisted Solution

by:Tony McCreath
Tony McCreath earned 1000 total points
ID: 22751502
I developed the following code to resolve encoding problems when directly using quoted text in mySql commands.
private static Regex _FromToRegex = new Regex(@"([\\\n\r\b\t'""\x1a\x00])",RegexOptions.Compiled);
 
private static string FromToMatchEvaluator(Match match)
{
	switch (match.Value)
	{
		case "\\":
			return "\\\\";
		case "\n":
			return "\\n";
		case "\r":
			return "\\r";
		case "\b":
			return "\\b";
		case "\t":
			return "\\t";
		case "\x1a":
			return "\\Z";
		case "\x00":
			return "\\0";
		case "'":
			return "\\'"; 
		case "\"":
			return "\\\"";
		default:
			return match.Value;
	}
}
 
public static string SqlEscapes(string s)
{
	return _FromToRegex.Replace(s,new MatchEvaluator(FromToMatchEvaluator));
}
 
public static string SqlString(String str)
{
	return "'"+SqlEscapes(str)+"'";
}

Open in new window

0
 

Expert Comment

by:rochefc
ID: 36709359
To replace Single Quotes, Double Quotes or Carriage Returns for use with Crystal Reports in C# try
 
fieldValue = fieldValue.Replace("\r\n", "' & chr(010) & '").Replace("'", "''").Replace("\"", "''''");

This allows the Crystal Report to Print with the desired result
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article introduced a TextBox that supports transparent background.   Introduction TextBox is the most widely used control component in GUI design. Most GUI controls do not support transparent background and more or less do not have the…
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…
In this video you will find out how to export Office 365 mailboxes using the built in eDiscovery tool. Bear in mind that although this method might be useful in some cases, using PST files as Office 365 backup is troublesome in a long run (more on t…
Suggested Courses

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question