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10.15.2007 at 12:28PM PDT, ID: 22894449

	[x] Attachment Details

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7.6

Asp.Net 2.0 Vb.Net View/Save Excel Worksheet from Infragistics Excel Workbook object, not file

Zones: Infragistics, Programming for ASP.NET, .NET Framework 2.0

Tags: excel, save

i Have an excel spreadsheet I create programatically with infragistics controls, ASP.Net 2.0 VB.Net. After the workbook is created, I want to send it to the client giving them the option to open or save it. All clients have Office 2007 installed. I would like to do this without saving the file to a disk on the server. Is there a way to go from the workbook object to saving the file onthe client side?

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Question Stats

Zone: Programming

Question Asked By: legmaker

Solution Provided By: hneagle

Participating Experts: 3

Solution Grade: A

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10.15.2007 at 12:36PM PDT, ID: 20080896

Rank: Genius

samtran0331:

without seeing some of your code, it's difficult to say for sure...but usually...if a file is being saved on the server and then sent back to the client, there is a filestream object involved...and usually...instead of using a filestream, you can use a memorystream and bypass the step of having a physical file saved on the server first....if you google "asp.net memorystream" you can see if the technique fits your needs...else post some code and we can help you further...the infragistics control might throw a monkeywrench into what I just said...

10.15.2007 at 12:51PM PDT, ID: 20081021

legmaker:

That is the approach I started to take. I need to send the memory stream to the client so they can open it as a workbook.::::

Protected Sub btnExcel_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnExcel.Click
Dim wb As New Excel.Workbook
Dim productHeading As Integer = 1
Dim mstr As New MemoryStream()
wb.Worksheets.Add("Sheet1")
Dim ws As Excel.Worksheet = wb.Worksheets("Sheet1")
With ws
.Rows.Item(0).Cells(1).Value = "Example Value"
End With

Excel.BIFF8Writer.WriteWorkbookToStream(wb, mstr)

'Put code to open stream on client here.

End Sub

10.15.2007 at 01:23PM PDT, ID: 20081250

Rank: Guru

surajguptha:

Response.Clear();
Response.Buffer= true;
Response.ContentType = "application/vnd.ms-excel";
Response.Charset = "";
this.EnableViewState = false;
System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
this.ClearControls(dg);
dg.RenderControl(oHtmlTextWriter);
Response.Write(oStringWriter.ToString());
Response.End();

This is an example of how you could write the excel file to the response that way not having to store the file anywhere in the server. In the above case, what is written is present as a text but in your case a Stream.

10.15.2007 at 01:45PM PDT, ID: 20081396

legmaker:

the file is not in a datagrid. it is in an infragistics.excel object. Also, vb.net although I speak C#.

10.15.2007 at 02:26PM PDT, ID: 20081637

Rank: Guru

surajguptha:

Yes i know it is a Infragistics excel object :). I just put it over there as an example
I was thinking more in the lines of

Response.Clear();
Response.Buffer= true;
Response.ContentType = "application/vnd.ms-excel";
Response.Charset = "";
this.EnableViewState = false;

Excel.BIFF8Writer.WriteWorkbookToStream(wb, mstr)

Response.Write(mstr.ToString()); << This is the part you have to work on trying to convert the memory stream to a enconding that will let your excel data across
Response.End();

10.15.2007 at 02:34PM PDT, ID: 20081688

legmaker:

I have used that code in a previous version for exporting regular datagrids and I can't get it to work... Thanks for the effort but that doesn't help me at all.....

10.16.2007 at 08:54AM PDT, ID: 20086605

Rank: Genius

samtran0331:

maybe this:

Dim wb As New Excel.Workbook
Dim productHeading As Integer = 1
Dim mstr As New IO.MemoryStream()
wb.Worksheets.Add("Sheet1")
Dim ws As Excel.Worksheet = wb.Worksheets("Sheet1")
With ws
.Rows.Item(0).Cells(1).Value = "Example Value"
End With

Excel.BIFF8Writer.WriteWorkbookToStream(wb, mstr)
'Put code to open stream on client here.
Dim arByte As Byte() = mstr.ToArray() 'Byte array to hold stream to write
With Context.Response
.BufferOutput = True
.Clear()
.ClearHeaders()
.ClearContent()
.ContentType = "application/vnd.ms-excel"
.Expires = 0
.Cache.SetCacheability(HttpCacheability.NoCache)
.Cache.SetNoServerCaching()
.Cache.SetNoStore()
.Cache.SetMaxAge(System.TimeSpan.Zero)
.OutputStream.Write(arByte, 0, arByte.Length) 'send the byte array to client
.End()
End With

11.19.2007 at 12:31PM PST, ID: 20315184

hneagle:

I have used this in VB.NET 2003 with good results:

Response.Clear()
Response.ContentType = "application/vnd.ms-excel"
Response.AddHeader("Content-Disposition", "attachment;filename=DocTypeInfo.xls")
Infragistics.Excel.BIFF8Writer.WriteWorkbookToStream(wkBook, Response.OutputStream)
Response.End()

Accepted Solution

20080236-EE-VQP-29 / EE_QW_1_20070628