Button click event is not firing

Question

Button click event is not firing

Simflex 321

Greetings again dear experts.

I have an .aspx page with two sections

One section allows our users to enter records displays existing records for update.

The second allows users to preview the records, whether insert or update before submitting to the database. This .aspx also has a popup extender with control ID of installAddress_MPE

Then on the vb (code behind), there is a search_click method.

On this method, the search takes the user to the section for inserting and editing records when the popup extender is exposed like this:

installAddress_MPE.Show()

Then there is a preview_click method that allows users to preview their records before submitting.

This method has the popup extender hidden like this:

installAddress_MPE.Hide()

For some reason, when I click the Preview button, my expectation is that it will take the user to the preview section to preview the records s/he entered before submitting.

However, clicking the preview button is not doing anything.

Could you guys be kind enough to show me what I am doing wrong?

I have relevant code and hopefully, that's enough code to show what I am trying to do.

The code is below:

Thanks in advance for your assistance.

<table>
  <tr>
    <td>
        <asp:Button ID="Preview" style="margin-left: 300px !important;" runat="server" Text="Review"  OnClick="btnPreview_Click" />
    </td>
  </tr>
  </table>
  
  Protected Sub btnPreview_Click(sender As Object, e As EventArgs) Handles Preview.Click
    FillSummary()
   installAddress_MPE.Hide()
  End Sub
  
         Protected Sub btnPreview_Click(sender As Object, e As EventArgs) Handles Preview.Click
             FillSummary()
             installAddress_MPE.Hide()
        End Sub
        
         Private Sub FillSummary()
            'Bring in modifier and dateReceived
            Dim Modifier As String = Session("IsModifier")
            Dim dateReceived = Session("dteReceived")
            '//Show Install Address Summary info
            installationAddress.Text = instAddress.Text & " " & instAddressCity.Text & " " & instAddressState.Text & " " & instAddressZip.Text

            If secondaryFirstName.Text <> "" And secondaryLastName.Text <> "" And Modifier <> "" Then
                ownerInformation.Text = primaryFirstName.Text & " " & primaryLastName.Text & " Or " & secondaryFirstName.Text & " " & secondaryLastName.Text
            ElseIf secondaryFirstName.Text <> "" And secondaryLastName.Text <> "" And Modifier = "" Then
                ownerInformation.Text = primaryFirstName.Text & " " & primaryLastName.Text & " Or " & secondaryFirstName.Text & " " & secondaryLastName.Text
                ownerInformation.Text = primaryFirstName.Text & " " & primaryLastName.Text & " " & secondaryFirstName.Text & " " & secondaryLastName.Text
            End If
            applicantName.Text = txtApplicant.Text

            dateReceived.Text = dateReceived
            waterAccountNumber.Text = instAddressAccount.Text
       End Sub

Lan Huang-MSFT 30,186 Microsoft External Staff

Hi @Simflex ,

You can check the breakpoint, the Preview button is triggered, it should be a problem with the FillSummary() method.

It is best to provide the complete code if possible.

I think you can use the ViewState method, which is what saves page and control values between round trips.

You can refer to the following example:

 <div>  
        User Name:-<asp:textbox id="TextBox1" runat="server"></asp:textbox>  
        <br />  
        Password  :-<asp:textbox id="TextBox2" runat="server"></asp:textbox>  
        <br />  
        <asp:button id="Button1" runat="server" onclick="Button1_Click" text="Submit" />  
        <asp:button id="Button3" runat="server" onclick="Button2_Click" text="Restore" />  
            </div>

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs)
        ViewState("name") = TextBox1.Text
        ViewState("password") = TextBox2.Text
        TextBox1.Text = String.Empty
        TextBox2.Text = String.Empty
    End Sub

    Protected Sub Button2_Click(ByVal sender As Object, ByVal e As EventArgs)
        If ViewState("name") IsNot Nothing Then
            TextBox1.Text = ViewState("name").ToString()
        End If
        If ViewState("password") IsNot Nothing Then
            TextBox2.Text = ViewState("password").ToString()
        End If
    End Sub

Best regards,
Lan Huang

Viorel 122.5K Reputation points

2023-01-30T11:25:29.3933333+00:00

Did you check if the function is executed (using Debugger)?
Simflex 321 Reputation points

2023-01-30T15:21:05.1566667+00:00
You are correct Lan, the issue is with the FillSummary method. These two lines:

ownerInformation.Text = primaryFirstName.Text & " " & primaryLastName.Text & " Or " & secondaryFirstName.Text & " " & secondaryLastName.Text ownerInformation.Text = primaryFirstName.Text & " " & primaryLastName.Text & " " & secondaryFirstName.Text & " " & secondaryLastName.Text

In an IF statement, I neglected to add ELSE between the two lines. Silly me but do you guys know why values are not populated from one section to the other via the FillSummary method?

When the button click event finally fired, the section it took me to does not display any of the values in FIllSummary. I know you recommended ViewSate, let me try just a few form fields with ViewState to see if it works.

Simflex 321

Unfortunately, using ViewState did not work.

Just show a bit more of what I am doing, there is btnSearch click method:

  Sub btnSearch_Click(ByVal sender As Object, ByVal e As EventArgs) 

'//Query database 
'/Read results
"Store results into the form fields
TextBox1.Text = dr("streetAddress").ToString()
ViewState("address") = TextBox1.Text
//Value from streetAddress gets stored into TextBox1.Text in one section of the page. You can clearly see this value when you load the page.

Sub btnPreview_Click(ByVal sender As Object, ByVal e As EventArgs) 
If ViewState("address") IsNot Nothing THen
PreViewAddress.Text = ViewState("address")

When I click Preview, I expect to see the same value of TextBox1.Text assigned to PreviewAddress.Text and displayed on the other section. However, when I click the Preview button, that section of page is blank.

The code is somewhat long but I will be happy to post them if you want to see them.

Lan Huang-MSFT 30,186 Reputation points Microsoft External Staff

2023-01-31T06:38:33.6266667+00:00

Hi @Simflex,

A line-by-line breakpoint inspection might be a little clearer.

The code is somewhat long but I will be happy to post them if you want to see them.

If there is a lot of code, you can provide a minimal example that can reproduce the problem, which can help you solve the problem better.
Simflex 321 Reputation points

2023-01-31T18:28:50.9933333+00:00

Ok, I got it working.

The issue is that I have the btnPreview button click inside an UpdatePanel control.

As soon as I removed the UpdatePanel, it started loading the values on the other section of the page as expected.

The issue though is that I need the UpdatePanel to stop some events like click or selection from dropdownlist from flickering.

Whenever I select from a dropdownlist, especially onSelectedIndexChanged, the form flickers. So, I need it but thanks for your assistance and feedback Lan.

I will figure out how to handle the UpdatePanel control.
Albert Kallal 5,586 Reputation points

2023-02-05T05:13:58.0533333+00:00

Your original code has the button event 2 times in that code. Perahps that was the issue? Now that the button works, you could re-add the update paneal around that markup, and see if it works.

Your answer

Lan Huang-MSFT 30,186 Reputation points Microsoft External Staff

2023-01-30T07:59:37.9266667+00:00

Hi @Simflex ,

You can check the breakpoint, the Preview button is triggered, it should be a problem with the FillSummary() method.

It is best to provide the complete code if possible.

I think you can use the ViewState method, which is what saves page and control values between round trips.

You can refer to the following example:

<div> User Name:-<asp:textbox id="TextBox1" runat="server"></asp:textbox> <br /> Password :-<asp:textbox id="TextBox2" runat="server"></asp:textbox> <br /> <asp:button id="Button1" runat="server" onclick="Button1_Click" text="Submit" /> <asp:button id="Button3" runat="server" onclick="Button2_Click" text="Restore" /> </div>

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) ViewState("name") = TextBox1.Text ViewState("password") = TextBox2.Text TextBox1.Text = String.Empty TextBox2.Text = String.Empty End Sub Protected Sub Button2_Click(ByVal sender As Object, ByVal e As EventArgs) If ViewState("name") IsNot Nothing Then TextBox1.Text = ViewState("name").ToString() End If If ViewState("password") IsNot Nothing Then TextBox2.Text = ViewState("password").ToString() End If End Sub

Best regards,
Lan Huang
Viorel 122.5K Reputation points

2023-01-30T11:25:29.3933333+00:00

Did you check if the function is executed (using Debugger)?
Simflex 321 Reputation points

2023-01-30T15:21:05.1566667+00:00

You are correct Lan, the issue is with the FillSummary method. These two lines:

ownerInformation.Text = primaryFirstName.Text & " " & primaryLastName.Text & " Or " & secondaryFirstName.Text & " " & secondaryLastName.Text ownerInformation.Text = primaryFirstName.Text & " " & primaryLastName.Text & " " & secondaryFirstName.Text & " " & secondaryLastName.Text

In an IF statement, I neglected to add ELSE between the two lines. Silly me but do you guys know why values are not populated from one section to the other via the FillSummary method?

When the button click event finally fired, the section it took me to does not display any of the values in FIllSummary. I know you recommended ViewSate, let me try just a few form fields with ViewState to see if it works.
Simflex 321 Reputation points

2023-01-30T19:53:53.64+00:00

Unfortunately, using ViewState did not work.

Just show a bit more of what I am doing, there is btnSearch click method:

Sub btnSearch_Click(ByVal sender As Object, ByVal e As EventArgs) '//Query database '/Read results "Store results into the form fields TextBox1.Text = dr("streetAddress").ToString() ViewState("address") = TextBox1.Text //Value from streetAddress gets stored into TextBox1.Text in one section of the page. You can clearly see this value when you load the page.

Sub btnPreview_Click(ByVal sender As Object, ByVal e As EventArgs) If ViewState("address") IsNot Nothing THen PreViewAddress.Text = ViewState("address")

When I click Preview, I expect to see the same value of TextBox1.Text assigned to PreviewAddress.Text and displayed on the other section. However, when I click the Preview button, that section of page is blank.

The code is somewhat long but I will be happy to post them if you want to see them.
Lan Huang-MSFT 30,186 Reputation points Microsoft External Staff

2023-01-31T06:38:33.6266667+00:00

Hi @Simflex,

A line-by-line breakpoint inspection might be a little clearer.

The code is somewhat long but I will be happy to post them if you want to see them.

If there is a lot of code, you can provide a minimal example that can reproduce the problem, which can help you solve the problem better.
Simflex 321 Reputation points

2023-01-31T18:28:50.9933333+00:00

Ok, I got it working.

The issue is that I have the btnPreview button click inside an UpdatePanel control.

As soon as I removed the UpdatePanel, it started loading the values on the other section of the page as expected.

The issue though is that I need the UpdatePanel to stop some events like click or selection from dropdownlist from flickering.

Whenever I select from a dropdownlist, especially onSelectedIndexChanged, the form flickers. So, I need it but thanks for your assistance and feedback Lan.

I will figure out how to handle the UpdatePanel control.
Albert Kallal 5,586 Reputation points

2023-02-05T05:13:58.0533333+00:00

Your original code has the button event 2 times in that code. Perahps that was the issue? Now that the button works, you could re-add the update paneal around that markup, and see if it works.

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Button click event is not firing

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