How to count a string for \ character?

Matjaz xyz

Hi. I just cant get this to work right! :( I tried two ways... yeah... only one is correct... but the returned value is not correct. This is my function:

public void DoYourThingBaby()
{
string pot = @Application.StartupPath + @"\" + lstFILES.SelectedItem;
StreamReader sr = new StreamReader(pot);
string tempF = sr.ReadToEnd();
sr.Close();

        char\[\] tempC = tempF.ToCharArray();

// this
int stevc=0;
foreach(char chr in tempC)
if(chr=='\')
stevc++;

// or this
label1.Text = Convert.ToString(tempF.IndexOf(@"\", 30));
}

the code counts something... but its not the right characters. i tried it with my file. if i count it in ultraedit - there are 18 characters '\'. with my application - around 300 :D help please :)? thanks in advance

Regards, Matjaž

Rob Philpott

Wild guess - something to do with Unicode/CodePage? If you open the file up using the binary editor is every other character zero?

Regards, Rob Philpott.

Matjaz xyz

Ok. Dont know why my solution didnt work... but i've modified it a bit - a bit of a hax :P If i putted '\\' char to search... it found something. What did it found - i dont know... but it wasn't right. So, i've tried this - created a new textbox and enter one character inside - the '\'. And with this IT WORKED. So, here is the new code, that works if anyone's intrested. PS: thanks for your reply Rob.

public void DoYourThingBaby()
{

        string pot = @Application.StartupPath + @"\\" + lstFILES.SelectedItem;
        StreamReader sr = new StreamReader(pot);
        string tempF = sr.ReadToEnd();
        sr.Close();

        char\[\] tempC = tempF.ToCharArray();

        //textBox1.Text = tempF;

        int stevc=0;
        foreach(char chr in tempC)
            if(chr==Convert.ToChar(textBox1.Text))
                stevc++;

        
    }

Regards, Matjaž

J4amieC

Can I ask what the point in the final 3 lines are below?

Matjaž Grahek wrote:

string pot = @Application.StartupPath + @"\" + lstFILES.SelectedItem; StreamReader sr = new StreamReader(pot); string tempF = sr.ReadToEnd(); sr.Close();

Seems a bit of a WTF to me.

Matjaz xyz

Bah... it IS WTF :) but its easier for my understanding... dont even bother with this. Programming is cool because of this - you have soooooo many different ways to make a program work.

Regards, Matjaž

Ben Fair

Just Split() the string on the char you want to count, the count will be the number of resulting array elements minus 1 (have to escape the backslash as '\\'). Most likely your results were thrown off by the escaping of special characters in the text (CRLF becomes \r\n, TAB becomes \t, etc.) and perhaps it brought them over into the char[] in that manner. Either way, this will do the trick:

public void DoYourThingBaby()
{
string pot = @Application.StartupPath + @"\" + lstFILES.SelectedItem;
if(!System.IO.File.Exists(pot))
return;
int count = System.IO.File.ReadAllText(pot).Split('\\').Length - 1
}

Keep It Simple Stupid! (KISS)

Jon Rista

You can use LINQ to accomplish the same thing in a more expressive manner:

int bkslashCount = 0;
string pot = Path.Combine(Application.StartupPath, lstFILES.SelectedItem); // USE Path.Combine!!
if (File.Exists(pot))
{
string data = File.ReadAllText(pot);
bkslashCount = data.ToCharArray().Where(c => c == '/').Count();
}

Luc Pattyn

Hi, probably a lot cheaper is count=str.Length-str.Replace("\\","").Length; :)

Luc Pattyn [Forum Guidelines] [My Articles]

Good riddance W

modified on Friday, June 10, 2011 12:07 PM