How to search text files for string?

[tig2810]

Hi all
This sounds easy and I'm sure it is but i'm just having so much trouble. I have a directory with text files. I want to search the text files for a string and return the name of the file that containes the string. I've tried various way below ut unsuccessfully. Please could someone take a look and offer some assistance?
thanks

 
            string directory = @"D:\SearchFolder";
            DirectoryInfo dirinfo = new DirectoryInfo(directory);
 
            FileInfo[] files = dirinfo.GetFiles("EE*.PRN");
 
            foreach (FileInfo i in files)
            {                
                List<string> lines = File.ReadAllLines(i.ToString().ToList());
                foreach (string line in lines)
                {
                    if (line.Contains("UNIQUESTRING"))
                        textBox2.Text += i + "contains" + line.ToString() + Environment.NewLine;
                }
 
                //Regex.Match(i, "UNIQUESTRING");
                //if (Regex.Match(i, "UNIQUESTRING")) 
                //{
                //    MessageBox.Show("File with regex is : " + i);
                //}
 
                //string ex = null;
                //ex = (from line in File.ReadAllLines(i)
                //      where line == "UNIQUESTRING"
                //      select line).ToString();
 
        }
 

[tlhintoq]

Are you actually looking for the word "UNIQUESTRING" in all upper case?
Or is UNIQUESTRING meant to be a variable thus shouldn't have quotes around it?

.Contains is case-sensitive so could that be the issue? You are searching for upper case in a lower case file?

[tig2810]

Yes, the string would be in all uppercase. The contents of the text files are also in uppercase.

[tig2810]

I should probably add that the snippet of code does not compile as i'm having some more type problems.

[tlhintoq]

Well... yeah... Not compiling will keeping it from finding what you are searching for.

[Curtis Rutland]

This should help:

string path = @"c:\dev\somedir";
string searchtext = "something";
DirectoryInfo di = new DirectoryInfo(path);
FileInfo[] files = di.GetFiles("*.txt");
foreach (FileInfo file in files)
{
    using (StreamReader sr = new StreamReader(file.FullName))
    {
        string content = sr.ReadToEnd().ToLower();
        if(content.Contains(searchtext.ToLower()))
            Console.WriteLine("{0} contains \"{1}\"",file.Name,searchtext);
        else
            Console.WriteLine("{0} does not contain \"{1}\"", file.Name, searchtext);
    }
}

This is written for a console app, so you will have to make appropriate changes.

[nomibashir]

This code is developed in C# and working wel. I have not much time so i did not finished in well maners. You can use this code to search your file according to your Question .

DirectoryInfo dir = new DirectoryInfo(@"d:\Text Files\"); // dir where you want tu search your file
            FileInfo[] fileInfo = dir.GetFiles();
 
            foreach (FileInfo file in fileInfo)
            {                
                StreamReader sr = new StreamReader(file.FullName);
                string allRead = sr.ReadToEnd();
                sr.Close();
                string fileName = file.Name;
                if (Regex.IsMatch(allRead, "UNIQUESTRING"))
                {
                    MessageBox.Show("Found: "+ fileName);
                    break;
                }
                else
                {
                    MessageBox.Show("Not Found");
                }
            }