Regardingg replacing the text in file using csharp

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hello

i have one text file which have some words or lines in it.

i want to search a paricular word in that file by entering in the textbox

After that i want to replace that particular word with another word entered in the textbox and by button click it should replace that word in the text file.

i have done for searching particular word in one line only i am not able to do serach for next line and also i used replace function but it is replacing entire lines in the text file instead of particular word.

i am doing this in CSharp in WINDOWS FORMS.

Posted 3-Jun-11 17:58pm

venkataramreddy

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Sergey Alexandrovich Kryukov 4-Jun-11 0:37am

Where is your question? Any problems?
--SA

4 solutions

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parmar_punit · Answer 1 · 2011-06-03T23:01:00

string AllText = System.IO.File.ReadAllText(@"c:\temp.txt");
StringBuilder str = new StringBuilder(AllText);
str.Replace("Old Values","New Values");
this.WriteToFile(@"c:\temp.txt",str.ToString());

C#

private bool WriteToFile(string path, string content)
{
    if (!string.IsNullOrEmpty(path))
    {
        try
        {
            using (StreamWriter sw = new StreamWriter(path))
            {
                sw.WriteLine(content);
            }
            return true;
        }
        catch (Exception ex)
        {
            MessageBox.Show("Cant write in file...\n" + ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            return false;
        }
    }
    return false;
}

prem shanker verma · Answer 2 · 2011-06-03T19:18:00

Solution 3

Read your file word by word in an array, loop the array and find the word
and then replace the word.

Posted 3-Jun-11 19:18pm

prem shanker verma

Ruard · Answer 3 · 2011-06-03T18:38:00

You can try this:

//Read a file as text:
string AllText = System.IO.File.ReadAllText(@"c:\temp\test1.txt");

string oldWord = "asd";
int oldWidth = oldWord.Length;
string newWord = "1234";
int i = AllText.IndexOf(oldWord);

while (i > -1)
{
    AllText = AllText.Substring(0, i) + newWord + AllText.Substring(i + oldWidth);
    i = AllText.IndexOf(oldWord, i);
}
//Do something with the result
Console.WriteLine(AllText);

Abhinav S · Answer 4 · 2011-06-03T18:29:00

Solution 1

Trying reading your file into a string array line by line and then replace all strings in this array with the word you have entered in your text box.

Posted 3-Jun-11 18:29pm

Abhinav S

Regardingg replacing the text in file using csharp

4 solutions

Solution 4

Solution 3

Solution 2

Solution 1

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