OnDoc/BarcodeLib/UI/Barcodekleber.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Windows.Input;

namespace BarcodeLib.UI
{
    public partial class Barcodekleber : Form
    {
        string connecionstring = string.Empty;
        public Barcodekleber()
        {
            InitializeComponent();
        }

        public Barcodekleber(string connectoinstring)
        {
            InitializeComponent();
            this.connecionstring = connectoinstring;
        }


        private void Barcodekleber_Load(object sender, EventArgs e)
        {
            DirectoryInfo d = new DirectoryInfo(Application.StartupPath+ @"\bck"); //Assuming Test is your Folder

            FileInfo[] Files = d.GetFiles("*.frx"); //Getting Text files
            string str = "";

            foreach (FileInfo file in Files)
            {
                this.cbxreportname.Items.Add(file.Name);
            }
            this.cbxreportname.SelectedIndex = 0;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            DataSet dataSet = new DataSet();
            dt.Columns.Add("barcode");
            dt.Columns.Add("barcodetext");
            for (int i = 0; i < Convert.ToInt32(textBox1.Text); i++)
            {
                DataRow dr = dt.NewRow();
                string s;
                s = i.ToString();
                while (s.Length < 8) { s = "0" + s; };
                dr[0] = Bar25I(s);
                dr[1] = s;
                dt.Rows.Add(dr);
            }
            dataSet.Tables.Add(dt);
            dt.TableName = "Barcodes";
            FastReport.Report report = new FastReport.Report();
            if (System.IO.File.Exists(Application.StartupPath + @"\bck\" + cbxreportname.Text) == true)
            {
                report.Load(Application.StartupPath + @"\bck\" + cbxreportname.Text);
            }
            
            else { }
            report.RegisterData(dataSet);
            report.GetDataSource("Barcodes").Enabled = true;
            report.Preview = previewControl1;
            report.Prepare();
            report.Design();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            DataSet dataSet = new DataSet();
            dt.Columns.Add("barcode");
            dt.Columns.Add("barcodetext");
            for (int i = 0; i < Convert.ToInt32(textBox1.Text); i++)
            {
                DataRow dr = dt.NewRow();
                Database.DB dB = new Database.DB(connecionstring);
                string key = dB.get_dbkey("barcodeetikette");

                string s;

                s = key;
                while (s.Length < 5) { s = "0" + s; };
                s = DateTime.Now.Year.ToString()+s;
                s = s+Helper.DivFnkt.modulo10(s).ToString();
                dr[0] = Bar25I(s);
                dr[1] = s;
                dt.Rows.Add(dr);
            }
            dataSet.Tables.Add(dt);
            dt.TableName = "Barcodes";
            FastReport.Report report = new FastReport.Report();
            if (System.IO.File.Exists(Application.StartupPath + @"\bck\" + cbxreportname.Text) == true)
            {
                report.Load(Application.StartupPath + @"\bck\" + cbxreportname.Text);
            }

            else { }
            report.RegisterData(dataSet);
            report.GetDataSource("Barcodes").Enabled = true;
            report.Preview = previewControl1;
            report.Prepare();
            report.ShowPrepared();


        }
        public bool IsNumeric(string value)
        {
            return value.All(char.IsNumber);
        }
        public string Bar25I(string BarTextIn)
        {
            string Bar25IRet = default;
            string BarTextOut = "";
            string TempString = "";
            long CharValue = 0;
            string barcodeout = "";
            // Initialize input and output strings
            BarTextOut = "";
            BarTextIn = BarTextIn.Trim();

            // Throw away non-numeric data
            TempString = "";
            for (int II = 1, loopTo = BarTextIn.Length; II <= loopTo; II++)
            {
                if (IsNumeric(BarTextIn.Substring(II - 1, 1)))
                {
                    TempString = TempString + BarTextIn.Substring(II - 1, 1);
                }
            }

            // If not an even number of digits, add a leading 0
            if (TempString.Length % 2 == 1)
            {
                TempString = "0" + TempString;
            }

            // Break digit pairs up and convert to characters- build output string
            for (int II = 1, loopTo1 = TempString.Length; II <= loopTo1; II += 2)
            {
                // Break string into pairs of digits and get value
                CharValue = Convert.ToInt32(TempString.Substring(II - 1, 2));
                // translate value to ASCII and save in BarTextOut
                if (CharValue < 90)
                {
                    BarTextOut = BarTextOut + (char)(CharValue + 33);
                }
                else
                {
                    BarTextOut = BarTextOut + (char)(CharValue + 71);
                }
            }

            // Build ouput string, trailing space for Windows rasterization bug
            barcodeout = "{" + BarTextOut + "} ";

            // Return the string
            Bar25IRet = barcodeout;
            return Bar25IRet;
        }

    }
}