Exception from HRESULT: 0x800A03EC - COM Exception Unhandled



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Exception from HRESULT: 0x800A03EC - COM Exception Unhandled

Postby S2FydGhpemVu » Sun, 15 Mar 2009 09:47:01 GMT


I am working on exporting data from a dataset to excel. When I used save
file dialog to save the file in a desired path I came across this Error.

Please find below the code I have used

using Microsoft.Office.Interop.Excel;
using System;
using System.Collections.Generic;
using System.Data;
using System.Text;

static class ExportingCellByCellMethod

public static void ExportToExcel(DataSet dataSet, string outputPath)
// public static void ExportToExcel(DataSet dataSet)

// Create the Excel Application object
ApplicationClass excelApp = new ApplicationClass();
//excelApp.Interactive = false;
// Create a new Excel Workbook
Workbook excelWorkbook = excelApp.Workbooks.Add(Type.Missing);

int sheetIndex = 0;

// Copy each DataTable as a new Sheet
foreach (System.Data.DataTable dt in dataSet.Tables)

// Create a new Sheet
Worksheet excelSheet = (Worksheet)excelWorkbook.Sheets.Add(
Type.Missing, 1, XlSheetType.xlWorksheet);

excelSheet.Name = dt.TableName;

// Copy the column names (cell-by-cell)
for (int col = 0; col < dt.Columns.Count; col++)
excelSheet.Cells[1, col + 1] = dt.Columns[col].ColumnName;

// Copy the values (cell-by-cell)
for (int col = 0; col < dt.Columns.Count; col++)
for (int row = 0; row < dt.Rows.Count; row++)
excelSheet.Cells[row + 2, col + 1] =




// Save and Close the Workbook

XlFileFormat.xlWorkbookNormal, Type.Missing,
Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, Type.Missing, Type.Missing,
excelWorkbook.Close(true, Type.Missing, Type.Missing);

excelWorkbook = null;

// Release the Application object
excelApp = null;

// Collect the unreferenced objects




using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;

RE: Exception from HRESULT: 0x800A03EC - COM Exception Unhandled

Postby QmFyYiBSZWluaGFyZHQ » Mon, 16 Mar 2009 00:22:01 GMT

s it possible you're trying to overwrite an existing file and you're getting
an error from that?

"Karthizen" wrote:

RE: Exception from HRESULT: 0x800A03EC - COM Exception Unhandled

Postby S2FydGhpemVu » Mon, 16 Mar 2009 01:38:01 GMT

hank you Barb for your reply. Well, I tried to overwrite an existing file &
also tried to save it as a new file. However in both cases I was getting
that Exception. It would be wonderful if you could help me out to solve this

"Barb Reinhardt" wrote:

RE: Exception from HRESULT: 0x800A03EC - COM Exception Unhandled

Postby S2FydGhpemVu » Wed, 18 Mar 2009 06:54:01 GMT

ny one there to give a solution?

"Karthizen" wrote:

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I know the question has been asked thousand times but I can't figure
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I'm getting a dataset as a query Result.
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I already know CopyFromRecordset does not work with Ado.Net Dataset
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System.Reflection.Missing.Value).Resize(2, 1).Value(Type.Missing) =

Please Help.
I know I missing paramater or doing some cast error.

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I have written a small tool for our internal purpose in VB.net. This tool
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Exception raised: "Exception from HRESULT: 0x800A03EC"

Note: Added "Microsoft Excel 11.0 Object Library" in the project reference.

Can anyone tell me what could be the problem ? If you need any other details,
please reply back.

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