CODEWITHSUNDEEP
.netvb.net
3.1415926535897932384626433832
3.1415926535897932384626433832

Reputation: 41

How to edit a line of data in text file

I would like to edit specific line in text file using vb.net. Example below is my data in text file:

Port1.txt

data1

data2

data3

data4

data5

data6

data7

I would like to edit data5 (line 5) in the text file to dataXX. How do I do that?

So far by using the code below, I only can access all the data listed instead of a row data.

 Dim path As String = "c:\Users\EliteBook\Desktop\Port1.txt"

    Dim readText() As String = File.ReadAllLines(path)
    Dim s As String
    For Each s In readText
        MsgBox(s)
    Next

This would give me an output in msgbox of all the data listed in the text file. How do I access a specific row of data instead of all of it? I have edited this question according to Nahum Litvin suggestion via here

Upvotes: 1

Views: 114

Answers (2)

Tim
Tim

Reputation: 28530

Nahum's answer is correct, but it's in C#. Here is the equivalent VB.NET, using the data in the code you posted in your question:

Dim path As String = "c:\Users\EliteBook\Desktop\Port1.txt"
Dim readText As String() = File.ReadAllLines(path)
readText(4) = "dataXX"
File.WriteAllLines(path, readText)

The above code reads the file into an array of string, one line per element. It then changes element 4 (the 5th line) to "dataXX", in this line of code:

readText(4) = "dataXX"

Then it saves the array back to the file, with line 5 reading "dataXX".

Upvotes: 2

Nahum
Nahum

Reputation: 7197

ur using the wrong methods.

http://msdn.microsoft.com/en-us/library/s2tte0y1(v=vs.110).aspx

approxemently like this I have no compiler at hand

string path = @"c:\temp\MyTest.txt";
string[] readText = File.ReadAllLines(path);
string[4] = "new data";
File.WriteAllLines(path, readText );

Upvotes: 2

Related Questions