asked on

how to fix web method error: Thread was being aborted: HttpContext.Current.Response.[End]()

hi,

I have web method to download csv file (from datatable) using jquery ajax

now everything is fine, but when the code reached to line:
HttpContext.Current.Response.[End]()
its exiting the method, and returning this error message in firebug: Thread was being aborted.

I tried to remove this line, but I didn't get the file to be saved,

here is my code:

    <WebMethod()> _
    Public Shared Function ExportReportAjax(ByVal ExportType As Integer, ByVal DataToExport As String) As String

        Dim clientID As String = HttpContext.Current.Session("ClientID")
        Dim strCheck As String = "Select Client_ClassID from dbo.CTS_Clients where Client_ID= " & clientID

        Dim dsCheck As DataSet = clsDB.getData(strCheck)

        Dim response As HttpResponse = HttpContext.Current.Response

        ExportToSpreadsheet(dsCheck.Tables(0), "asfas")

        Return ""
    End Function

    Public Shared Sub ExportToSpreadsheet(ByVal table As DataTable, ByVal name As String)
        Dim context As HttpContext = HttpContext.Current
        context.Response.Clear()

        For Each column As DataColumn In table.Columns
            context.Response.Write(column.ColumnName + ";")
        Next

        context.Response.Write(Environment.NewLine)

        For Each row As DataRow In table.Rows
            For i As Integer = 0 To table.Columns.Count - 1
                context.Response.Write(row(i).ToString().Replace(";", String.Empty) & ";")
            Next
            context.Response.Write(Environment.NewLine)
        Next

        context.Response.ContentType = "text/csv"
        context.Response.AppendHeader("Content-Disposition", "attachment; filename=" & name & ".csv")
        context.Response.[End]()
    End Sub

Open in new window

Rajar Ahmed

'While using update panel , Response.end makes this problem . You can skip that exception by the below way .

Public Shared Sub ExportToSpreadsheet(ByVal table As DataTable, ByVal name As String)
try
Dim context As HttpContext = HttpContext.Current
context.Response.Clear()

For Each column As DataColumn In table.Columns
context.Response.Write(column.ColumnName + ";")
Next

context.Response.Write(Environment.NewLine)

For Each row As DataRow In table.Rows
For i As Integer = 0 To table.Columns.Count - 1
context.Response.Write(row(i).ToString().Replace(";", String.Empty) & ";")
Next
context.Response.Write(Environment.NewLine)
Next

context.Response.ContentType = "text/csv"
context.Response.AppendHeader("Content-Disposition", "attachment; filename=" & name & ".csv")
context.Response.[End]()
return ""
catch ex as exception
if (instr(lcase(ex.message),"thread was being aborted") then
return ""
end if
end try
end sub

njgroup

ASKER

same error, even in try catch, the error is thrown !

ASKER CERTIFIED SOLUTION

Nasir Razzaq

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