Folder Multiple Documents same no how to get all doc path

string pattern = $"{identifier}_*.pdf";   $ { this is not working website 2010 version please any other wayin this string code

string pattern = $"{identifier}_*.pdf"

$"{category}*.pdf"; this in 2017 version only no isuue but older web site this code showing error 

 

string pattern = $"{identifier}_*.pdf";

                string pattern1 = $"{identifier}_*.pdf";
                string Gpfno = gpfno;

                string[] laststrings = Directory.GetFiles(directoryPath, pattern1);

                string[] files = Directory.GetFiles(directoryPath, pattern);
i am using this code this one working latest version but web site s its showing error 

i try "${" +identifier+"}" "_*.pdf like also but this code not working any other way in this  string pattern1 = $"{identifier}_*.pdf"; in websites

To retrieve file paths from a folder structure in C# based on the provided category (like Af_10008), you can use the System.IO namespace to search through the folders and gather the paths of matching files. Below is an example demonstrating how to do this in a C# Windows Forms application.

Example Code

This example will search through the specified folder structure (Gpf containing Af, Pol, etc.) and retrieve the paths of files matching a specific prefix.

using System;
using System.Collections.Generic;
using System.IO;
using System.Windows.Forms;

namespace DocumentFinderApp
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private void SearchDocuments(string baseDirectory, string category)
        {
            // Create a list to hold the file paths
            List filePaths = new List();

            // Get all directories inside the base directory
            string[] subDirectories = Directory.GetDirectories(baseDirectory);

            foreach (string dir in subDirectories)
            {
                // Search for PDF files that match the category
                string searchPattern = $"{category}*.pdf"; // E.g., Af_10008*.pdf
                string[] files = Directory.GetFiles(dir, searchPattern);

                // Add found files to the list
                filePaths.AddRange(files);
            }

            // Display the found file paths (or update your data source)
            DisplayFilePaths(filePaths);
        }

        private void DisplayFilePaths(List filePaths)
        {
            foreach (var path in filePaths)
            {
                // Example: Display in a message box or a list control
                MessageBox.Show(path);
            }
        }

        private void SearchButton_Click(object sender, EventArgs e)
        {
            // Example usage
            string baseDirectory = @"C:\Path\To\Gpf"; // Update to your base directory
            string category = "Af_10008"; // Example category input
            SearchDocuments(baseDirectory, category);
        }
    }
}

Explanation

1. SearchDocuments Method:

   • Takes the base directory and category as parameters.
   • Retrieves all subdirectories within the base directory.
   • For each subdirectory, it looks for files matching the category pattern (e.g., Af_10008*.pdf).
   • It collects the paths of all matching PDF files into a list.

2. DisplayFilePaths Method:

   • Iterates through the list of found file paths and displays each path.
   • You can modify this method to update a grid, list box, or any other UI element instead of showing message boxes.

3. SearchButton_Click Event:

   • Calls the SearchDocuments method with the specified base directory and category when a button is clicked.

Additional Considerations

• Make sure to handle exceptions that may arise due to permissions or nonexistent paths.
• Adjust the base directory and category based on user input or specific use cases.
• This example uses message boxes for simplicity; for a production application, consider using a list view or another UI component for better user experience.