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QuestionServer cannot append header after HTTP headers Pin
balu1234523-Mar-10 22:12
balu1234523-Mar-10 22:12 
Hi All,

In my Webpage i have a Button control.

On the button Click i have following functionalities

1.To show the "progress bar" Icon during retrieving data from Sqlserver Database..
2.After retrieving a Data from DB a csv report will be generated.



For Point 1--the below is the code i have used

Code snippet for busy Icon:

============================
Response.Write("<div ID='mydiv' STYLE='position:absolute;z-index:5000;topBlush | :O ;leftBlush | :O ;width:100%;height:100%;'><table cellspacing='0' cellpadding='0' border='0' align='center'><tr><td class='copy' align='right' height='260'><img src='./processingimage.gif' width='0' align='absmiddle'></td></tr><tr><td class='copyblack' style='font-family:arial;font-size:14px' align='center'><img src='./processingimage.gif' border='0' align='absmiddle'><br><br>" + strBusyMessage + "<br>" + strReportCreteria + "</td></tr></table>")
Response.Write("&nbsp;")
Response.Write("</div>")
Response.Write("<script> var mydiv = document.getElementById('mydiv');</script>")
Response.Write("<script language=javascript>")
Response.Write("function StartShowWait(){mydiv.style.visibility ='visible';}")
Response.Write("function HideWait(){mydiv.style.visibility = 'hidden';}")
Response.Write("StartShowWait();</script>")
'Page.Session.Add("SessionID", Session.SessionID)
Response.Flush()
=================================

For point 2: please see the below code snippet

Code snippet to generate CSV report.


==================================================
Response.AddHeader("Content-Disposition", "attachment; filename=" + CSVName)
Response.ContentType = "application/csv"
Response.Write(CSVContent)
Response.Flush()
Response.Close()
=====================================================
when coming to above mention code line(bold one in above snippet) i am getting the below error
"Server cannot append header after HTTP headers have been sent"

Please help me in resolving the above error.
QuestionBlakberry screen alignment from ASP.NET Pin
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QuestionIn an asp.net, how to get a reference of a custom webcontrol from a usercontrol? Pin
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QuestionProblem with linq on Gridview Pin
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QuestionCSS rendering differences based on web SERVER version? Pin
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QuestionNeed eyes for GridView weirdness - FindControl returns null when requesting a control that I know exists Pin
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GeneralRe: Need eyes for GridView weirdness - FindControl returns null when requesting a control that I know exists Pin
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QuestionjQuery framework reference Pin
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Questionwhat is publishing in ASP.NET Pin
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