Excel C# Helper

Ever need to work with Excel in C#? It is not fun at all. Here is a helper class for you:

using System;
using System.Collections.Generic;
using System.Text;

namespace JLFramework
{
  class ExcelAgent
  {
      Excel._Worksheet _sheet;

      int _row;
      int _col;

      int _defaultInteriorColorIndex;

      public ExcelAgent(Excel._Worksheet sheet)
      {
          _sheet = sheet;
      }

      public void SetDefaultInteriorColorIndex(int colorIndex)
      {
          _defaultInteriorColorIndex = colorIndex;
      }

      public void Goto(int row, int col)
      {
          _row = row;
          _col = col;
      }

      public void DrawEdge(Excel.XlBordersIndex side, Excel.XlLineStyle lineStyle, Excel.XlBorderWeight weight)
      {
          Excel.Range range = CurrentRange;
          range.Borders[side].LineStyle = lineStyle;
          range.Borders[side].Weight = weight;
      }

      public void WriteLine(string text)
      {
          _sheet.Cells[_row++, _col] = text;

          if (GetInteriorColorIndex() == (int)Excel.Constants.xlNone)
              SetInteriorColorIndex(_defaultInteriorColorIndex);
      }

      public void SetInteriorColorIndex(int colorIndex)
      {
          CurrentRange.Interior.ColorIndex = colorIndex;
      }

      public void SetFontColorIndex(int colorIndex)
      {
          CurrentRange.Font.ColorIndex = colorIndex;
      }

      public int CurrentRowIndex
      {
          get { return _row; }
      }

      public int CurrentColIndex
      {
          get { return _col; }
      }

      #region Private methods

      private int GetInteriorColorIndex()
      {
          return (int) CurrentRange.Interior.ColorIndex;
      }

      private Excel.Range CurrentRange
      {
          get
          {
              return (Excel.Range)_sheet.Cells[_row, _col];
          }
      }

      #endregion
  }
}