执行m_oExcelApp= new Excel.ApplicationClass();报错，报错信息：拒绝访问。 (webform程序)

Question

用的操作系统是win2003，开发环境.net2003 webform
执行m_oExcelApp= new Excel.ApplicationClass();
报错，报错信息：拒绝访问。 谁有webform下导出excel程序能否给份源码？
QQ：87221857  
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Answer 1

web.config中设模拟身份就不会报错了
<identity impersonate="true"  />

Answer 2

try
{
Application exc = new Application();
if (exc == null) 
{
Response.Write("ERROR: EXCEL couldn't be started!");

}

Workbooks workbooks = exc.Workbooks;
_Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet); 
Sheets sheets = workbook.Worksheets;
_Worksheet worksheet = (_Worksheet) sheets.get_Item(1);
               
if (worksheet == null) 
{
Console.WriteLine ("ERROR: worksheet == null");
}
Range range1 = worksheet.get_Range("C1", Type.Missing);
if (range1 == null) 
{
Console.WriteLine ("ERROR: range == null");
}
const int nCells = 1;
Object[] args1 = new Object[1];
args1[0] = nCells;
range1.GetType().InvokeMember("Value", BindingFlags.SetProperty, null,range1, args1);
exc.Visible=true;

FileName = "temp.xls";
       
                string fullFileName   = Path.Combine(Environment.CurrentDirectory, FileName);
fullFileName = Path.GetFullPath("WebForm1.");
if(File.Exists(fullFileName).Equals(true))
{
   File.SetAttributes(fullFileName, FileAttributes.Normal);
}
exc.DisplayAlerts = false;
                workbook.SaveAs(fullFileName,string.Empty,string.Empty,string.Empty,string.Empty,string.Empty,Excel.XlSaveAsAccessMode.xlExclusive,string.Empty,string.Empty,string.Empty,string.Empty,string.Empty);
              
if( File.Exists(fullFileName).Equals(true))
{
File.SetAttributes(fullFileName, FileAttributes.ReadOnly);
} }
catch(Exception e )
{
   throw e;
}