#️⃣ C# Help mga master sa C# if null item

[tamadsijuan]

3 folders with CSV files
lahat ng folder papasukin and imerge yung mga csv files into 1 file(Merged.csv)

Question is nag eeror sya pag walang laman yung isang folder
new lang po kasi sa c# or programming
ang idea ko is gagamit ako ng if statment kaso hindi ko sure kung saan ko ilalagay at panung code(statement)yung ilalagay ko

error ko is : {"Sequence contains no elements"} sa may csvheader

salamat po sa mga makakatulong

namespace Merge
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Path paths = new Path();
            /*paths.path1 = textBox1.Text + @"\";
            paths.path2 = textBox2.Text + @"\";
            paths.path3 = textBox3.Text + @"\";*/


            var Allpaths = new List<string>() { paths.path1, paths.path2, paths.path3 };


            foreach (string lcPaths in Allpaths)
            {
                string newPath = lcPaths + "merged.csv";

                var all = Directory.GetFiles(lcPaths, "*.csv", SearchOption.TopDirectoryOnly);

                string[] csvheader = { File.ReadAllLines(all.First()).First(l => !string.IsNullOrWhiteSpace(l)) };
                var mergedata = all.SelectMany(csv => File.ReadAllLines(csv).SkipWhile(l => string.IsNullOrWhiteSpace(l)).Skip(0));


                File.WriteAllLines(newPath, mergedata);
                
            }

        }
    }
}

 

[dee-u]

Hindi ko sure kung saan nagerror, baka puwede mo lagyan ng Try Catch itong statements na ito:

string[] csvheader = { File.ReadAllLines(all.First()).First(l => !string.IsNullOrWhiteSpace(l)) };
var mergedata = all.SelectMany(csv => File.ReadAllLines(csv).SkipWhile(l => string.IsNullOrWhiteSpace(l)).Skip(0));

File.WriteAllLines(newPath, mergedata);

 

[tamadsijuan]

Hindi ko sure kung saan nagerror, baka puwede mo lagyan ng Try Catch itong statements na ito:

string[] csvheader = { File.ReadAllLines(all.First()).First(l => !string.IsNullOrWhiteSpace(l)) };
var mergedata = all.SelectMany(csv => File.ReadAllLines(csv).SkipWhile(l => string.IsNullOrWhiteSpace(l)).Skip(0));

File.WriteAllLines(newPath, mergedata);

thanks sir na solve ko na din po ito hahaha
iclose thread ko nalang
bali nag condition pa ako before ng code na ito