C#读写Excel

//-----------------------------------------------------------------------

//  This file is part of the Microsoft .NET Framework SDK Code Samples.

// 

//  Copyright (C) Microsoft Corporation.  All rights reserved.

// 

//This source code is intended only as a supplement to Microsoft

//Development Tools and/or on-line documentation.  See these other

//materials for detailed information regarding Microsoft code samples.

// 

//THIS CODE AND INFORMATION ARE PROVIDED AS IS WITHOUT WARRANTY OF ANY

//KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE

//IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A

//PARTICULAR PURPOSE.

//-----------------------------------------------------------------------

using System;

using System.Reflection; // For Missing.Value and BindingFlags

using System.Runtime.InteropServices; // For COMException

using Microsoft.Office.Interop.Excel;



class AutoExcel {

	public static int Main() {

	

		Console.WriteLine ("Creating new Excel.Application");

		Application app = new Application();

		if (app == null) {

			Console.WriteLine("ERROR: EXCEL couldn't be started!");

			return 0;

		}

		

		Console.WriteLine ("Making application visible");		

		app.Visible = true;

		

		Console.WriteLine ("Getting the workbooks collection");

		Workbooks workbooks = app.Workbooks;



		Console.WriteLine ("Adding a new workbook");

		

		_Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet);



		Console.WriteLine ("Getting the worksheets collection");

		Sheets sheets = workbook.Worksheets;



		_Worksheet worksheet = (_Worksheet) sheets.get_Item(1);

		if (worksheet == null) {

			Console.WriteLine ("ERROR: worksheet == null");

		}

		

		Console.WriteLine ("Setting the value for cell");

		

		// This paragraph puts the value 5 to the cell G1

	    Range range1 = worksheet.get_Range("G1", Missing.Value);

		if (range1 == null) {

			Console.WriteLine ("ERROR: range == null");

		}

		const int nCells = 5;

		range1.Value2 = nCells;

		

		// This paragraph sends single dimension array to Excel

	    Range range2 = worksheet.get_Range("A1", "E1");

		int[] array2 = new int [nCells];

		for (int i=0; i < array2.GetLength(0); i++) {

			array2[i] = i+1;

		}

		range2.Value2 = array2;



		// This paragraph sends two dimension array to Excel

	    Range range3 = worksheet.get_Range("A2", "E3");

		int[,] array3 = new int [2, nCells];

		for (int i=0; i < array3.GetLength(0); i++) {

			for (int j=0; j < array3.GetLength(1); j++) {

				array3[i, j] = i*10 + j;

			}

		}

		range3.Value2 = array3;



		// This paragraph reads two dimension array from Excel

	    Range range4 = worksheet.get_Range("A2", "E3");

		Object[,] array4;

		array4 = (Object[,])range4.Value2;

		

		for (int i=array4.GetLowerBound(0); i <= array4.GetUpperBound(0); i++) {

			for (int j=array4.GetLowerBound(1); j <= array4.GetUpperBound(1); j++) {

				if ((double)array4[i, j] != array3[i-1, j-1]) {

					Console.WriteLine ("ERROR: Comparison FAILED!");

					return 0;

				}

			}

		}



		// This paragraph fills two dimension array with points for two curves and sends it to Excel

	    Range range5 = worksheet.get_Range("A5", "J6");

		double[,] array5 = new double[2, 10];

		for (int j=0; j < array5.GetLength(1); j++) {

			double arg = Math.PI/array5.GetLength(1) * j;

			array5[0, j] = Math.Sin(arg);

			array5[1, j] = Math.Cos(arg);

		}

		range5.Value2 = array5;

		

		// The following code draws the chart

		range5.Select();

		ChartObjects chartobjects = (ChartObjects) worksheet.ChartObjects(Missing.Value);

		

		ChartObject chartobject = (ChartObject) chartobjects.Add(10 /*Left*/, 100 /*Top*/, 450 /*Width*/, 250 /*Height*/);

		_Chart chart = (_Chart) chartobject.Chart;

		

		// Call to chart.ChartWizard() is shown using late binding technique solely for the demonstration purposes

		Object[] args7 = new Object[11];

		args7[0] = range5; // Source

		args7[1] = XlChartType.xl3DColumn; // Gallery

		args7[2] = Missing.Value; // Format

		args7[3] = XlRowCol.xlRows; // PlotBy

		args7[4] = 0; // CategoryLabels

		args7[5] = 0; // SeriesLabels

		args7[6] = true; // HasLegend

		args7[7] = "Sample Chart"; // Title

		args7[8] = "Sample Category Type"; // CategoryTitle

		args7[9] = "Sample Value Type"; // ValueTitle

		args7[10] = Missing.Value; // ExtraTitle

		chart.GetType().InvokeMember("ChartWizard", BindingFlags.InvokeMethod, null, chart, args7);

	    

		Console.WriteLine ("Press ENTER to finish the sample:");

		Console.ReadLine();		

		

		try {

			// If user interacted with Excel it will not close when the app object is destroyed, so we close it explicitely

			workbook.Saved = true;

			app.UserControl = false;

			app.Quit();

		} catch (COMException) {

			Console.WriteLine ("User closed Excel manually, so we don't have to do that");

		}

		

		Console.WriteLine ("Sample successfully finished!");

		return 100;

	}

}