MainClass.cs :  » Development » NExcel » ExcelValues » C# / CSharp Open Source

using System;
using System.IO;

namespace ExcelValues{
  /// <summary>
  /// Main class.
  /// </summary>
  class MainClass
  {
    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main(string[] args)
    {
      // read input parameters
      Param param = new Param(args);
      // if input parameters are not valid, writes usage and exits
      if (param.IsValid()==false)
      {
        WriteUsage();
        return;
      }

      // reads the Excel file and writes values to console
      ExcelEngine engine = new ExcelEngine();
      engine.Write(param.Filename);

    }


    #region "Write Utils"

    /// <summary>
    /// Writes to console the usage text.
    /// </summary>
    private static void WriteUsage()
    {
      Console.WriteLine("Writes to console the values of a Excel file.");
      Console.WriteLine("Usage: ExcelValues  filename");
      Console.WriteLine("");
      Console.WriteLine("  filename             the Excel file name");
    }

    #endregion

    #region "Param Class"

    /// <summary>
    /// Container class of application's input parameters.
    /// </summary>
    class Param
    {
      /// <summary>
      /// File name.
      /// Otherwise is null.
      /// </summary>
      public string Filename = null;

      /// <summary>
      /// Create a new instance, reading data from args.
      /// </summary>
      /// <param name="args">the application's input parameters</param>
      public Param(string[] args)
      {
        // check input parameters
        if (args==null) return;
        if (args.Length<1) return;

        // set input parameters
        try
        {
          FileInfo fi = new FileInfo(args[0]);
          this.Filename = fi.FullName;
        }
        catch
        {
          this.Filename = null;
        }
      }

      /// <summary>
      /// Returns true if it has valid data.
      /// Otherwise returns false.
      /// </summary>
      /// <returns></returns>
      public bool IsValid()
      {
        if (this.Filename==null) return false;

        return true;
      }
    }
    #endregion

  }
}