Find Replace Text in File

Question

0.00/5 (No votes)

See more:

Hi,

I have a requirement to search for a value in a text file and replace it with a value entered by a user. The file is of the following format:

[Value1]
Key1=0
Key2=1
Key3=2

[Value2]
Key1=0
Key2=1
Key3=2

[Value3]
Key1=0
Key2=1
Key3=2

etc..

I need to be able to do a search on a value/key pair and edit the value associated with the key. For example I'd like to be able to call a fucntion something like:

C#

WriteParam("[Value1]","Key3","123")

This will generate

[Value1]
Key1=0
Key2=1
Key3=123

So far I have come up with this:

C#

private void WriteTest()
       {

           List<string> lines = new List<string>(File.ReadAllLines(@"D:\InitiatorVals.ini"));
           foreach(string line in lines)
           {
               if((string.Compare(line,"[Type1]"))==0)
               {
                  //Found the value how to locate the key and edit the associated value

               }
           }
       }

Normally I would persevere and figure it out for myself but I'm under time constraints. Therefore I would be very grateful for any and all assistance.

Thanks so much

Posted 6-Jul-14 23:46pm

conradsmith

Updated 6-Jul-14 23:56pm

Thomas Daniels

v2

Add a Solution

3 solutions

Solution 2

Hello

see the below link

An INI file handling class using C#[^]

Posted 7-Jul-14 0:06am

CB Sharma

Comments

conradsmith 8-Jul-14 4:04am

Hi thanks for the quick response. I like this solution. However when I implemented it the IniWriteFile didn't work. I quick search on the internet and I found I have to edit the registry. I entered my file InitiatorVals.ini to HKEY_LOCAL_MACHINE\SOFTWARE \Microsoft\Windows NT\CurrentVersion\IniFileMapping but I don't know what values to add to this.

Solution 1

Here is my little logic with out the full code. hope it may give you some more idea.

<pre lang="c#">
private void WriteTest()
{

List lines = new List(File.ReadAllLines(@"D:\InitiatorVals.ini"));
foreach(string line in lines)
{
if((string.Compare(line,"[Type1]"))==0)
{
//Here is the new changes
//store the position to say int x
//find next index of '['
//store it to y

//from x to y in loop 
//find the key with equal sign ex: 'Key2='
//store the index and count upto new line character 
//replace it
//

}
}
}

Posted 6-Jul-14 23:59pm

Kailash Polai

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Thomas Daniels · Accepted Answer · 2014-07-07T00:09:00

Try this:

C#

private void WriteParam(string section, string key, string value)
{
    List<string> lines = new List<string>(File.ReadAllLines(@"D:\InitiatorVals.ini"));
    int index = lines.IndexOf(section);
    if (index > -1)
    {
        bool valueChanged = false;
        while (!lines[++index].StartsWith("["))
        {
            if (lines[index].StartsWith(String.Concat(key, "=")))
            {
                lines[index] = String.Format("{0}={1}", key, value);
                valueChanged = true;
                break;
            }
        }
        if (!valueChanged)
        {
            // key not found, create it if you want
        }
    }
    else
    {
        // section not found, if you want, create a new one
    }

    File.WriteAllLines(@"D:\InitiatorVals.ini", lines);
}

At lines[++index], it is necessary that you add the ++ before the variable name, because that makes sure that the return value of the operation is the value after the variable is incremented.