External table is not in the expected format. (My program exported a excel file by using)

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Hi,

My program exported a excel file by using

C#

Context.Response.AddHeader("content-disposition", attachment)
Context.Response.ContentType ="application/vnd.ms-excel"

my excel file saved in webpage format, after downloading the same when i import it back to my system using Microsoft Excel driver, i got an error:
External table is not in the expected format.

Do anyone know how to solve it?
Expecting for your help very urgent

kalai

My Export Excel coding
" Dim form As New HtmlForm()
Dim attachment As String = "attachment; filename=Patients.xls"
Context.Response.ClearContent()
Context.Response.AddHeader("content-disposition", attachment)
Context.Response.ContentType = "application/ms-excel"
Dim stw As New StringWriter()
Dim htextw As New HtmlTextWriter(stw)
form.Controls.Add(GridView1)
Me.Controls.Add(form)
form.RenderControl(htextw)
Context.Response.Write(sb.ToString())"

MyConnection = New system.Data.OleDb.OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0; " & _
"data source=C:\Users\develope\Downloads\Patients.xls; " & "Extended Properties=Excel 8.0;")

This is my connection string but i get same error
"External table is not in the expected format.

Posted 6-Apr-13 19:39pm

kalaiselvansurya

Updated 7-Apr-13 6:19am

v4

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Sandeep Mewara · Answer 1 · 2013-04-06T23:22:00

Solution 1

Similar issue discussions:
External table is not in the expected format.[^]
Excel “External table is not in the expected format.”[^]

"External table is not in the expected format." typically occurs when trying to use an Excel 2007 file with a connection string that uses: Microsoft.Jet.OLEDB.4.0 and Extended Properties=Excel 8.0

If needed, look here[^] for more.

Posted 6-Apr-13 23:22pm

Sandeep Mewara

Comments

Maciej Los 7-Apr-13 5:25am

+5!

Sandeep Mewara 7-Apr-13 5:27am

Thanks Mac. :)

kalaiselvansurya 7-Apr-13 12:18pm

My Export Excel coding
" Dim form As New HtmlForm()
Dim attachment As String = "attachment; filename=Patients.xls"
Context.Response.ClearContent()
Context.Response.AddHeader("content-disposition", attachment)
Context.Response.ContentType = "application/ms-excel"
Dim stw As New StringWriter()
Dim htextw As New HtmlTextWriter(stw)
form.Controls.Add(GridView1)
Me.Controls.Add(form)
form.RenderControl(htextw)
Context.Response.Write(sb.ToString())"

MyConnection = New system.Data.OleDb.OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0; " & _
"data source=C:\Users\develope\Downloads\Patients.xls; " & "Extended Properties=Excel 8.0;")

This is my connection string but i get same error
"External table is not in the expected format. "