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POExporting data to excel file C#.NET
 

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    <p>I want to export the data from a access database to excel file. But i got Exception from HRESULT: 0x800A03EC error.</p> <p>Here is a bit of code that i have written,</p> <pre><code>using System; using System.Data; using System.Data.OleDb; using System.Configuration; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Text; using System.Windows.Forms; using Excel = Microsoft.Office.Interop.Excel; private void showBtn_Click(object sender, EventArgs e) { int cnt = -1; Excel.Application xlApp; Excel.Workbook xlWorkBook; Excel.Worksheet xlWorkSheet; object misValue = System.Reflection.Missing.Value; xlApp = new Excel.ApplicationClass(); xlWorkBook = xlApp.Workbooks.Add(misValue); xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1); OleDbConnection thisConnection = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\AyumiDB1.mdb"); thisConnection.Open(); OleDbCommand thisCommand = thisConnection.CreateCommand(); thisCommand.CommandText = "SELECT CodeNumber, Particular, LF, DebitCredit, Amount FROM JournalVoucher"; OleDbDataReader thisReader = thisCommand.ExecuteReader(); while (thisReader.Read()) { cnt++; MessageBox.Show(thisReader["CodeNumber"].GetType().ToString()); xlWorkSheet.Cells[cnt, 1] = thisReader["CodeNumber"].ToString(); xlWorkSheet.Cells[cnt, 2] = thisReader["Particular"].ToString(); xlWorkSheet.Cells[cnt, 3] = thisReader["LF"].ToString(); xlWorkSheet.Cells[cnt, 4] = thisReader["DebitCredit"].ToString(); xlWorkSheet.Cells[cnt, 5] = thisReader["Amount"].ToString(); } thisReader.Close(); thisConnection.Close(); xlWorkBook.SaveAs("csharp-Excel.xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue); xlWorkBook.Close(true, misValue, misValue); xlApp.Quit(); releaseObject(xlWorkSheet); releaseObject(xlWorkBook); releaseObject(xlApp); } private void releaseObject(object obj) { try { System.Runtime.InteropServices.Marshal.ReleaseComObject(obj); obj = null; } catch (Exception ex) { obj = null; MessageBox.Show("Exception Occured while releasing object " + ex.ToString()); } finally { GC.Collect(); } } </code></pre> <p>My problem is the</p> <pre><code>MessageBox.Show(thisReader["CodeNumber"].GetType().ToString()); </code></pre> <p>runs perfectly, but when i tried to insert the same value to the cell of excel with</p> <pre><code>xlWorkSheet.Cells[cnt, 1] = thisReader["CodeNumber"].ToString(); </code></pre> <p>then the exception is thrown.</p> <p>Am i doing something wrong??</p> <p>Thanks</p>
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