Question

I have a method and I want to query the 3rd column in my CSV file BUT I want to only display the first four columns. I am hoping to do something like

SELECT * FROM Table WHERE User-Name='%PERSON%'

but apply it to my CSV file.

    public static DataTable ParseCSV(string path, String pattern)
    {
        if (!File.Exists(path))
            return null;
        string full = Path.GetFullPath(path);
        string file = Path.GetFileName(full);
        string dir = Path.GetDirectoryName(full);
        string connString = "Provider=Microsoft.Jet.OLEDB.4.0;"
            + "Data Source=\"" + dir + "\\\";"
            + "Extended Properties=\"text;HDR=No;FMT=Delimited\"";
        string query = "SELECT F1, F2, F3 FROM " + file;
        DataTable dTable = new DataTable();
        OleDbDataAdapter dAdapter = new OleDbDataAdapter(query, connString);
        try
        {
            dAdapter.Fill(dTable);
        }
        catch (InvalidOperationException ioe)
        {
            Console.WriteLine(ioe.Message.ToString());
        }
        dAdapter.Dispose();
        return dTable;
    }


    private void buttonSearch_Click(object sender, EventArgs e)
    {
        path = textBoxFilePath.Text.ToString().Trim();
        //BindingSource to sync DataTable and DataGridView
        BindingSource bSource = new BindingSource();
        //set the BindingSource DataSource
        bSource.DataSource = ParseCSV(path, pattern);
        dataGridView1.DataSource = bSource;
    }

Also my CSV file has a header row which i would like to be the header row for my DataGridView.

Thanks

Answer 1

change your select statement to:

query = "select F3 from " + file;

to retrieve the third column. If you want to add the headers then change the connection string to include HDR=YES and refer to the columns by name in the same way you would for a normal query:

query = "select mycolumn from " + file;