This is my first console application project in C# and I'm attempting to import the used area of an excel sheet into a Two-Dimensional Array. This may not be the most efficient way to do this, but this is the code I have so far.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Excel = Microsoft.Office.Interop.Excel;
using System.Reflection;
Excel.Application excelApp = new Excel.Application();
excelApp.Visible = true;
string workbookPath = "C:/Users/Snuge/Desktop/CourseNumbersNoWSReg.xlsx";
Excel.Workbook excelWorkbook = excelApp.Workbooks.Open(workbookPath,
0, false, 5, "", "", false, Excel.XlPlatform.xlWindows, "",
true, false, 0, true, false, false);
// This selectes the used range of the excel workbook and enters it in
// a two dimentional array
try
{
// Get a reference to the first sheet of the workbook.
Excel.Sheets excelSheets = excelWorkbook.Worksheets;
string currentSheet = "Sheet1";
Excel.Worksheet excelWorksheet = (Excel.Worksheet)excelSheets.get_Item(currentSheet);
// write out to console for debugging
Console.WriteLine("excelWorksheet is " + excelWorksheet);
// Get a range of data.
Excel.Range excelCell = (Excel.Range)excelWorksheet.get_Range("A3", Missing.Value);
// write out to console for debugging
Console.WriteLine("excelCell is " + excelCell);
// write out to console for debugging
Console.WriteLine("Creating string[,] array. . . ");
// Retrieve the data from the range.
Object[,] dataArray;
// write out to console for debugging
Console.WriteLine("String[,] array created. . . ");
dataArray = (System.Object[,])excelCell.get_Value(Missing.Value);
// write out to console for debugging
Console.WriteLine("Counting rows and columns. . . ");
// Determine the dimensions of the array.
int iRows;
int iCols;
iRows = dataArray.GetUpperBound(0);
iCols = dataArray.GetUpperBound(1);
// write out to console for debugging
Console.WriteLine("Printing array. . . ");
// Print the data of the array.
for (int rowCounter = 1; rowCounter <= iRows; rowCounter++)
{
// write out to console for debugging
Console.WriteLine("row " + rowCounter);
for (int colCounter = 1; colCounter <= iCols; colCounter++)
{
// Write the next value to the console.
Console.WriteLine("col " + colCounter + "= " + dataArray[rowCounter, colCounter].ToString() + ", ");
}
// Write in a new line.
Console.WriteLine("\n");
}
}
catch (Exception theException)
{
// Create error message
String errorMessage;
errorMessage = "Error: ";
errorMessage = String.Concat(errorMessage, theException.Message);
errorMessage = String.Concat(errorMessage, " Line: ");
errorMessage = String.Concat(errorMessage, theException.Source);
// Display error message
MessageBox.Show(errorMessage, "Error");
}
I inserted the Console.Writeline(); for debugging purposes. The correct Excel workbook opens and the output I obtain in the command prompt is
excelWorksheet is System.__ComObject
excelCell is System.__ComObject
Creating string[,] array. . .
String[,] array created. . .
Then a message box pops up with the message
"Error: Cannot convert type 'string' to object[*,*] Line: Anonymously Hosted DynamicMethods Assembly".
This line of code gives me an error and i don't know why.
dataArray = (System.Object[,])excelCell.get_Value(Missing.Value);
Could somebody provide me with a solution for this problem?
Also, is there code to display a value instead of "System.__ComObject" in the command prompt?
I'm using Excel 2007 and I've added the Microsoft Excel 12.0 Object Library reference.
Best Answer
I think you could use
or