Why does asp.net Response.redirect() work in Visual Studio Debug but fails on the Production IIS server. IIS setting maybe?

Question

Why does asp.net Response.redirect() work in Visual Studio Debug but fails on the Production IIS server. IIS setting maybe?

mike murray 0

I have a an IIS website that has been running since 2015.

But in recent times the QA team have spotted that a Gridview link doesn't redirect to a new page anymore using Response.redirect(). The Response.Redirect() is on the server.

I checked it in Debug mode in the Visual Studio environment and it redirects perfectly using LocalHost on the VS built in Web client.

The only things different between the two environments are

1: It's in debug mode on my development machine.

2: The Production Server is using IIS and my debug environment is using the built in web client.

Viorel 88,081 Reputation points

2023-02-25T06:33:22.1666667+00:00

Maybe you should use a path that starts with "~/". Show some details about Redirect and its effects.

mike murray 0

Hi Viorel. The code was working up to three months ago, then something changed either on IIS or the Prod server which stopped the redirect working. Here is the code.

The top bit is an excerpt of the ASPX showing the grid code, and the bottom is the code behind.

<asp:DataGrid ID="gvReferrals" runat="server" AutoGenerateColumns="False"

                                            CellPadding="1" ForeColor="#333333" GridLines="Both" Width="00px"  AutoPostback="True">                 

                                <Columns>

                                    <asp:TemplateColumn HeaderText="Referral Number" HeaderStyle-Width="60px"  HeaderStyle-Font-Size="8"  >

                                        <ItemTemplate>

                                            <asp:LinkButton ID="EditButton" runat="server" Text= '<%# Eval("Referral Number") %>' Width="60px" EnableEventValidation="False" HeaderStyle-HorizontAlalign="Left" Autopostback="true" OnClick="RedirectEvent_Click">     

                                            </asp:LinkButton>

                                        </ItemTemplate>

 

                                        <HeaderStyle Width="50px"></HeaderStyle>

 

                                    </asp:TemplateColumn>

                                     ...

 

 

 

 

    Protected Sub RedirectEvent_Click(ByVal sender As Object, ByVal e As EventArgs)

 

        Dim strReferralNumber As String

        Dim strBankID As String

        Using item As DataGridItem = DirectCast(DirectCast(sender, LinkButton).Parent.Parent, DataGridItem)

            strReferralNumber = item.Cells(1).Text

            strBankID = item.Cells(2).Text

        End Using

        Dim url As String = "~/Referral.aspx?GlobalReferralNumber=" + strReferralNumber + "&BankID=" + strBankID

        Response.Redirect(URL, False)

    End Sub

mike murray 0

//Hi Viorel, this redirect was working up to three months ago. Then something changed on the server //whether it was IIS settings or something on the server


<asp:DataGrid ID="gvReferrals" runat="server" AutoGenerateColumns="False"

                                            CellPadding="1" ForeColor="#333333" GridLines="Both" Width="00px"  AutoPostback="True">                 

                                <Columns>

                                    <asp:TemplateColumn HeaderText="Referral Number" HeaderStyle-Width="60px"  HeaderStyle-Font-Size="8"  >

                                        <ItemTemplate>

                                            <asp:LinkButton ID="EditButton" runat="server" Text= '<%# Eval("Referral Number") %>' Width="60px" EnableEventValidation="False" HeaderStyle-HorizontAlalign="Left" Autopostback="true" OnClick="RedirectEvent_Click">     

                                            </asp:LinkButton>

                                        </ItemTemplate>

 

                                        <HeaderStyle Width="50px"></HeaderStyle>

 

                                    </asp:TemplateColumn>

                                     ...

 

 

 

 

    Protected Sub RedirectEvent_Click(ByVal sender As Object, ByVal e As EventArgs)

 

        Dim strReferralNumber As String

        Dim strBankID As String

        Using item As DataGridItem = DirectCast(DirectCast(sender, LinkButton).Parent.Parent, DataGridItem)

            strReferralNumber = item.Cells(1).Text

            strBankID = item.Cells(2).Text

        End Using

        Dim url As String = "~/Referral.aspx?GlobalReferralNumber=" + strReferralNumber + "&BankID=" + strBankID

        Response.Redirect(URL, False)

    End Sub

mike murray 0 Reputation points

2023-02-25T13:13:52.05+00:00

Also It works in debug mode within Visual Studio, but is only failing to redirect on the prod server.
Viorel 88,081 Reputation points

2023-02-25T14:51:45.4633333+00:00

What happens on prod. server? (What address is opened in browser?)
mike murray 0 Reputation points

2023-02-25T16:10:42.92+00:00

The browser does not open to the new page in production IIS. It stays on the old page with the grid. No errors. But the Response.Redirect() is been hit with the correct URL.

In debug on the built in web server on Visual studio it redirects correctly to the new page, but on IIS in Production it just stays on the grid page without an error..
Sam Wu-MSFT 5,516 Reputation points Microsoft Vendor

2023-02-27T08:09:42.08+00:00

@mike murray

then something changed either on IIS or the Prod server which stopped the redirect working.

Please clear your browser's cache and try again, can you share what changes happened to the servers? and your configuration information in iis, have you used url rewrite or reverse proxy?

You can useFiddler to view detailed information.

Viorel 88,081 Reputation points

2023-02-25T06:33:22.1666667+00:00

Maybe you should use a path that starts with "~/". Show some details about Redirect and its effects.
mike murray 0 Reputation points

2023-02-25T13:05:11.4233333+00:00

Hi Viorel. The code was working up to three months ago, then something changed either on IIS or the Prod server which stopped the redirect working. Here is the code.

The top bit is an excerpt of the ASPX showing the grid code, and the bottom is the code behind.

<asp:DataGrid ID="gvReferrals" runat="server" AutoGenerateColumns="False" CellPadding="1" ForeColor="#333333" GridLines="Both" Width="00px" AutoPostback="True"> <Columns> <asp:TemplateColumn HeaderText="Referral Number" HeaderStyle-Width="60px" HeaderStyle-Font-Size="8" > <ItemTemplate> <asp:LinkButton ID="EditButton" runat="server" Text= '<%# Eval("Referral Number") %>' Width="60px" EnableEventValidation="False" HeaderStyle-HorizontAlalign="Left" Autopostback="true" OnClick="RedirectEvent_Click"> </asp:LinkButton> </ItemTemplate> <HeaderStyle Width="50px"></HeaderStyle> </asp:TemplateColumn> ... Protected Sub RedirectEvent_Click(ByVal sender As Object, ByVal e As EventArgs) Dim strReferralNumber As String Dim strBankID As String Using item As DataGridItem = DirectCast(DirectCast(sender, LinkButton).Parent.Parent, DataGridItem) strReferralNumber = item.Cells(1).Text strBankID = item.Cells(2).Text End Using Dim url As String = "~/Referral.aspx?GlobalReferralNumber=" + strReferralNumber + "&BankID=" + strBankID Response.Redirect(URL, False) End Sub
mike murray 0 Reputation points

2023-02-25T13:08:38.2933333+00:00

//Hi Viorel, this redirect was working up to three months ago. Then something changed on the server //whether it was IIS settings or something on the server <asp:DataGrid ID="gvReferrals" runat="server" AutoGenerateColumns="False" CellPadding="1" ForeColor="#333333" GridLines="Both" Width="00px" AutoPostback="True"> <Columns> <asp:TemplateColumn HeaderText="Referral Number" HeaderStyle-Width="60px" HeaderStyle-Font-Size="8" > <ItemTemplate> <asp:LinkButton ID="EditButton" runat="server" Text= '<%# Eval("Referral Number") %>' Width="60px" EnableEventValidation="False" HeaderStyle-HorizontAlalign="Left" Autopostback="true" OnClick="RedirectEvent_Click"> </asp:LinkButton> </ItemTemplate> <HeaderStyle Width="50px"></HeaderStyle> </asp:TemplateColumn> ... Protected Sub RedirectEvent_Click(ByVal sender As Object, ByVal e As EventArgs) Dim strReferralNumber As String Dim strBankID As String Using item As DataGridItem = DirectCast(DirectCast(sender, LinkButton).Parent.Parent, DataGridItem) strReferralNumber = item.Cells(1).Text strBankID = item.Cells(2).Text End Using Dim url As String = "~/Referral.aspx?GlobalReferralNumber=" + strReferralNumber + "&BankID=" + strBankID Response.Redirect(URL, False) End Sub
mike murray 0 Reputation points

2023-02-25T13:13:52.05+00:00

Also It works in debug mode within Visual Studio, but is only failing to redirect on the prod server.
Viorel 88,081 Reputation points

2023-02-25T14:51:45.4633333+00:00

What happens on prod. server? (What address is opened in browser?)
mike murray 0 Reputation points

2023-02-25T16:10:42.92+00:00

The browser does not open to the new page in production IIS. It stays on the old page with the grid. No errors. But the Response.Redirect() is been hit with the correct URL.

In debug on the built in web server on Visual studio it redirects correctly to the new page, but on IIS in Production it just stays on the grid page without an error..
Sam Wu-MSFT 5,516 Reputation points Microsoft Vendor

2023-02-27T08:09:42.08+00:00

@mike murray

then something changed either on IIS or the Prod server which stopped the redirect working.

Please clear your browser's cache and try again, can you share what changes happened to the servers? and your configuration information in iis, have you used url rewrite or reverse proxy?

You can useFiddler to view detailed information.

Answer 1

mike murray 0

Thanks for the suggestions but I found the answer.

The Web Pool for the application was changed from Classic to Integrated.

Why would this happen?

This literally stops the Response.Redirect() from redirecting.

Switch back to Classic it redirects again. Switch to integrated and it stops working again.

Why does asp.net Response.redirect() work in Visual Studio Debug but fails on the Production IIS server. IIS setting maybe?

1 answer

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