Breakpoint not getting hit inside user control in C#

Question

Breakpoint not getting hit inside user control in C#

Partha Mandayam 91

I am debugging a user control. I have a breakpoint inside a checkbox_checkedchanged event but it is not being hit. If I click the checkbox, the control is not going inside the checkedchanged event and hitting the breakpoint. However if I put a breakpoint in Page_Load that is being hit.

Why?

SurferOnWww 4,721 Reputation points

2023-08-28T00:42:44.37+00:00

Can you show a minimum sample code only to reproduce the issue?
Lan Huang-MSFT 30,191 Reputation points Microsoft External Staff

2023-08-28T03:23:48.8+00:00
Hi @Partha Mandayam,

To fire CheckedChanged event set the following properties for CheckBox, AutoPostBack property should be true.

<asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="true" OnCheckedChanged="checkbox_checkedchanged" />

Partha Mandayam 91

Autopostback is true but still it is not going into that code

<asp:CheckBox ID="chkSelectOnMag" runat="server" AutoPostBack="true" OnCheckedChanged="chkSelect_CheckedChanged" />

some partial code

breakpoint inside this on the line below is not being hit

Why?

 if (!(AZHelper.GetCurrentPageName() == "ValueZoneRequestManagement.aspx"))        {



protected void chkSelect_CheckedChanged(object sender, EventArgs e)
    {
        int iCounter            = 0;
        Guid AssetZoneGuid      = Guid.Empty;     
        string sCaption         = string.Empty;
        ActionsEntity actionentity  = null;
        AssetsEntity oAssetsEntity = null;
        AssetStatusTypeScreenElementsCollection AssetButtonCaptions = null;
        ActionTypeStatusScreenElementsEntity ActionTypeStatusScreenElementInfo = null;
        DataTable ActionButtonCaptions = null;
        DataTable validactionstable = new DataTable();
        GridViewRow row         = null;
        CheckBox objchk         = null;
        System.Collections.Generic.List<string> Fields;
        Guid mContactGuid = Guid.Empty;
        Guid mCompanyGuid = Guid.Empty;
        Guid mLocationGuid = Guid.Empty;
        Guid mDivisionGuid = Guid.Empty;
        ListItem LI;
        mCompanyGuid = AZHelper.GetCurrentCompany();
        mContactGuid = AZHelper.GetContactGuid();

        if (!(AZHelper.GetCurrentPageName() == "ValueZoneRequestManagement.aspx"))
        {
            GridView ShowActionResult   = ((GridView)AZHelper.FindControlRecursive(Page, "ShowActionResult"));
            DropDownList ddlActions     = ((DropDownList)AZHelper.FindControlRecursive(Page, "ddlActions"));
           
            clearDropDownList(ddlActions);

            #region Action tab

            for (int i = 0; i < ShowActionResult.Rows.Count; i++)
            {
                row = ShowActionResult.Rows[i];
                objchk = (

.... lots more code

Lan Huang-MSFT 30,191 Reputation points Microsoft External Staff

2023-08-28T07:11:43.69+00:00
Hi @Partha Mandayam,

breakpoint inside this on the line below is not being hit

If there is no breakpoint, there is a problem with the code. You can use try-catch to catch specific problems.

try { //your code } catch (Exception ex) { throw ex; }

Or you provide all related codes like AZHelper.GetCurrentPageName(), otherwise we can't help you.

Based on the code you've currently provided, you're wondering why the breakpoint doesn't go into the if ? First, you make two judgments in if, that is, only when AZHelper.GetCurrentPageName() is not ValueZoneRequestManagement.aspx, the breakpoint in if will be hit.

You need to confirm that AZHelper.GetCurrentPageName() is not returning ValueZoneRequestManagement.aspx.

If you want to enter the IF when AZHelper.GetCurrentPageName() is the ValueZoneRequestManagement.aspx page, you only need to make a judgment once.

if (AZHelper.GetCurrentPageName() == "ValueZoneRequestManagement.aspx")
Partha Mandayam 91 Reputation points

2023-08-28T07:49:35.3566667+00:00

No my original question has not been solved. Breakpoint on the if line is not being hit. I'm not putting breakpoint inside the if so there is no need for this check

You need to confirm that AZHelper.GetCurrentPageName() is not returning ValueZoneRequestManagement.aspx.

Now explain to me why the code is not going into the CHeckedchanged event at all!!!

Lan Huang-MSFT 30,191 Microsoft External Staff

Hi @Partha Mandayam,

I misunderstood your meaning. But as SurferOnWww said, you need to provide minimal sample code to reproduce the issue.

Here is the code I tested:

WebUserControl1.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WebUserControl1.ascx.cs" Inherits="WebForm731.WebUserControl1" %>
<asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="true" OnCheckedChanged="checkbox_checkedchanged" />

WebUserControl1.ascx.cs

 protected void Page_Load(object sender, EventArgs e)
 {

 }

 protected void checkbox_checkedchanged(object sender, EventArgs e)
 {
  
 }

ASPX

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm17.aspx.cs" Inherits="WebForm731.WebForm17" %>
<%@ Register Src="~/WebUserControl1.ascx" TagPrefix="uc" TagName="WEB"%>  
<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <uc:WEB ID="web1" runat="server" /> 
         
        </div>
    </form>
</body>
</html>

Partha Mandayam 91 Reputation points

2023-08-28T08:09:34.4133333+00:00

a simple sample program like this works for me also. So why it doesn't work in my environment? I also have Autopostback=true then why breakpoint inside checkedchanged event is not being hit. Actually there is some bug in the checkedchanged event due to which certain other controls are not getting enabled which I have to debug but if it doesn't hit the breakpoint at all then how can I debug?
Lan Huang-MSFT 30,191 Reputation points Microsoft External Staff

2023-08-28T08:31:17.7166667+00:00

Hi @Partha Mandayam,

Can you show a minimum sample code only to reproduce the issue?
AgaveJoe 30,126 Reputation points

2023-08-28T11:40:22.4366667+00:00

User controls, by definition, should not have dependencies on the parent page or other controls external to the user control. Your user control design checks if it is executing in the ValueZoneRequestManagement.aspx and perhaps other controls. The parent page should manage this type of logic not a user control.

Refactoring the code will most likely fix this issue.
Partha Mandayam 91 Reputation points

2023-08-28T13:02:58.6133333+00:00

that's because the same control is used in multiple pages and has different behavior. if user control is called from aspx, it has to have a dependency on that. I don't understand your point.

Partha Mandayam 91

this is minimal code

ascx
============
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="AssetActionDetailsRow.ascx.cs" Inherits="AssetActionDetailsRow" %>

<div class="clear"></div>
<div class="main_row clickable" id="rowhighlight" runat="server" >
<div class="act_main1">
  <asp:Panel ID="pnlAssetData" runat="server">
    <div class="main_row_title">
<asp:CheckBox ID="chkSelectOnMag" runat="server" AutoPostBack="true" OnCheckedChanged="chkSelect_CheckedChanged" />

ascx.cs
=======
protected void chkSelect_CheckedChanged(object sender, EventArgs e)
    {
        
        int iCounter            = 0;
     }

AgaveJoe 30,126 Reputation points

2023-08-28T14:04:35.0766667+00:00

that's because the same control is used in multiple pages and has different behavior. if user control is called from aspx, it has to have a dependency on that. I don't understand your point.

My point is you are not using Web Forms tools as intended which is causing you to create buggy code.

When was the last time a textbox server control had to check which page it was on in order to function properly? It is the same concept with a user control. A user control should not need to check which page loaded the user control or even care. Nor should the user control directly affect controls outside the user control.

The parent page orchestrates server control members though properties, methods and events. Not the other way around.

lastly, I cannot reporduce the problem using your sample code. If you want the community to debug your code then it is up to you to provide code that illustrates the bug.
Partha Mandayam 91 Reputation points

2023-08-28T15:25:28.3333333+00:00

what do you mean by not using Web Forms tools as intended

1 answer

Your answer

SurferOnWww 4,721 Reputation points

2023-08-28T00:42:44.37+00:00

Can you show a minimum sample code only to reproduce the issue?
Lan Huang-MSFT 30,191 Reputation points Microsoft External Staff

2023-08-28T03:23:48.8+00:00

Hi @Partha Mandayam,

To fire CheckedChanged event set the following properties for CheckBox, AutoPostBack property should be true.

<asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="true" OnCheckedChanged="checkbox_checkedchanged" />
Partha Mandayam 91 Reputation points

2023-08-28T06:44:21.14+00:00

Autopostback is true but still it is not going into that code

<asp:CheckBox ID="chkSelectOnMag" runat="server" AutoPostBack="true" OnCheckedChanged="chkSelect_CheckedChanged" />

some partial code

breakpoint inside this on the line below is not being hit

Why?

if (!(AZHelper.GetCurrentPageName() == "ValueZoneRequestManagement.aspx")) {

protected void chkSelect_CheckedChanged(object sender, EventArgs e) { int iCounter = 0; Guid AssetZoneGuid = Guid.Empty; string sCaption = string.Empty; ActionsEntity actionentity = null; AssetsEntity oAssetsEntity = null; AssetStatusTypeScreenElementsCollection AssetButtonCaptions = null; ActionTypeStatusScreenElementsEntity ActionTypeStatusScreenElementInfo = null; DataTable ActionButtonCaptions = null; DataTable validactionstable = new DataTable(); GridViewRow row = null; CheckBox objchk = null; System.Collections.Generic.List<string> Fields; Guid mContactGuid = Guid.Empty; Guid mCompanyGuid = Guid.Empty; Guid mLocationGuid = Guid.Empty; Guid mDivisionGuid = Guid.Empty; ListItem LI; mCompanyGuid = AZHelper.GetCurrentCompany(); mContactGuid = AZHelper.GetContactGuid(); if (!(AZHelper.GetCurrentPageName() == "ValueZoneRequestManagement.aspx")) { GridView ShowActionResult = ((GridView)AZHelper.FindControlRecursive(Page, "ShowActionResult")); DropDownList ddlActions = ((DropDownList)AZHelper.FindControlRecursive(Page, "ddlActions")); clearDropDownList(ddlActions); #region Action tab for (int i = 0; i < ShowActionResult.Rows.Count; i++) { row = ShowActionResult.Rows[i]; objchk = ( .... lots more code
Lan Huang-MSFT 30,191 Reputation points Microsoft External Staff

2023-08-28T07:11:43.69+00:00

Hi @Partha Mandayam,

breakpoint inside this on the line below is not being hit

If there is no breakpoint, there is a problem with the code. You can use try-catch to catch specific problems.

try { //your code } catch (Exception ex) { throw ex; }

Or you provide all related codes like AZHelper.GetCurrentPageName(), otherwise we can't help you.

Based on the code you've currently provided, you're wondering why the breakpoint doesn't go into the if ? First, you make two judgments in if, that is, only when AZHelper.GetCurrentPageName() is not ValueZoneRequestManagement.aspx, the breakpoint in if will be hit.

You need to confirm that AZHelper.GetCurrentPageName() is not returning ValueZoneRequestManagement.aspx.

If you want to enter the IF when AZHelper.GetCurrentPageName() is the ValueZoneRequestManagement.aspx page, you only need to make a judgment once.

if (AZHelper.GetCurrentPageName() == "ValueZoneRequestManagement.aspx")
Partha Mandayam 91 Reputation points

2023-08-28T07:49:35.3566667+00:00

No my original question has not been solved. Breakpoint on the if line is not being hit. I'm not putting breakpoint inside the if so there is no need for this check

You need to confirm that AZHelper.GetCurrentPageName() is not returning ValueZoneRequestManagement.aspx.

Now explain to me why the code is not going into the CHeckedchanged event at all!!!
Lan Huang-MSFT 30,191 Reputation points Microsoft External Staff

2023-08-28T08:04:40.8766667+00:00

Hi @Partha Mandayam,

I misunderstood your meaning. But as SurferOnWww said, you need to provide minimal sample code to reproduce the issue.

Here is the code I tested:

WebUserControl1.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WebUserControl1.ascx.cs" Inherits="WebForm731.WebUserControl1" %> <asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="true" OnCheckedChanged="checkbox_checkedchanged" />

WebUserControl1.ascx.cs

protected void Page_Load(object sender, EventArgs e) { } protected void checkbox_checkedchanged(object sender, EventArgs e) { }

ASPX

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm17.aspx.cs" Inherits="WebForm731.WebForm17" %> <%@ Register Src="~/WebUserControl1.ascx" TagPrefix="uc" TagName="WEB"%> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <uc:WEB ID="web1" runat="server" /> </div> </form> </body> </html>
Partha Mandayam 91 Reputation points

2023-08-28T08:09:34.4133333+00:00

a simple sample program like this works for me also. So why it doesn't work in my environment? I also have Autopostback=true then why breakpoint inside checkedchanged event is not being hit. Actually there is some bug in the checkedchanged event due to which certain other controls are not getting enabled which I have to debug but if it doesn't hit the breakpoint at all then how can I debug?
Lan Huang-MSFT 30,191 Reputation points Microsoft External Staff

2023-08-28T08:31:17.7166667+00:00

Hi @Partha Mandayam,

Can you show a minimum sample code only to reproduce the issue?
AgaveJoe 30,126 Reputation points

2023-08-28T11:40:22.4366667+00:00

User controls, by definition, should not have dependencies on the parent page or other controls external to the user control. Your user control design checks if it is executing in the ValueZoneRequestManagement.aspx and perhaps other controls. The parent page should manage this type of logic not a user control.

Refactoring the code will most likely fix this issue.
Partha Mandayam 91 Reputation points

2023-08-28T13:02:58.6133333+00:00

that's because the same control is used in multiple pages and has different behavior. if user control is called from aspx, it has to have a dependency on that. I don't understand your point.
Partha Mandayam 91 Reputation points

2023-08-28T13:03:38.1533333+00:00

this is minimal code

ascx ============ <%@ Control Language="C#" AutoEventWireup="true" CodeFile="AssetActionDetailsRow.ascx.cs" Inherits="AssetActionDetailsRow" %> <div class="clear"></div> <div class="main_row clickable" id="rowhighlight" runat="server" > <div class="act_main1"> <asp:Panel ID="pnlAssetData" runat="server"> <div class="main_row_title"> <asp:CheckBox ID="chkSelectOnMag" runat="server" AutoPostBack="true" OnCheckedChanged="chkSelect_CheckedChanged" /> ascx.cs ======= protected void chkSelect_CheckedChanged(object sender, EventArgs e) { int iCounter = 0; }
AgaveJoe 30,126 Reputation points

2023-08-28T14:04:35.0766667+00:00

that's because the same control is used in multiple pages and has different behavior. if user control is called from aspx, it has to have a dependency on that. I don't understand your point.

My point is you are not using Web Forms tools as intended which is causing you to create buggy code.

When was the last time a textbox server control had to check which page it was on in order to function properly? It is the same concept with a user control. A user control should not need to check which page loaded the user control or even care. Nor should the user control directly affect controls outside the user control.

The parent page orchestrates server control members though properties, methods and events. Not the other way around.

lastly, I cannot reporduce the problem using your sample code. If you want the community to debug your code then it is up to you to provide code that illustrates the bug.
Partha Mandayam 91 Reputation points

2023-08-28T15:25:28.3333333+00:00

what do you mean by not using Web Forms tools as intended

Answer 1

Below is an example designing a user control. The parent page can set the label and read the checkbox state.

UserControl

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WebUserControl1.ascx.cs" Inherits="WebFormsDemo.UserControlDemo.WebUserControl1" %>
<div>
    <asp:CheckBox ID="chkSelectOnMag" runat="server" AutoPostBack="true" OnCheckedChanged="chkSelectOnMag_CheckedChanged"/>
    <asp:Label ID="SelectOnMagLabel" runat="server" Text=""></asp:Label>
</div>

    public partial class WebUserControl1 : System.Web.UI.UserControl
    {
        public string CheckboxLabel
        {
            get { return chkSelectOnMag.Text; }
            set { chkSelectOnMag.Text = value; }
        }
        public bool IsChecked
        {
            get { return chkSelectOnMag.Checked; }
        }
        public event EventHandler SelectOnMagCheckChanged;
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void chkSelectOnMag_CheckedChanged(object sender, EventArgs e)
        {
            OnCheckedChanged(e);
        }

        protected void OnCheckedChanged(EventArgs e)
        {
            if (SelectOnMagCheckChanged != null)
            {
                SelectOnMagCheckChanged(this, e);
            }
        }
    }

Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebFormsDemo.UserControlDemo.Default" %>
<%@ Register Src="~/UserControlDemo/WebUserControl1.ascx" TagPrefix="uc1" TagName="WebUserControl1" %>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <uc1:webusercontrol1 runat="server" id="MyWebUserControl1" />
        </div>
    </form>
</body>
</html>

    public partial class Default : System.Web.UI.Page
    {   
        protected void Page_Load(object sender, EventArgs e)
        {
            MyWebUserControl1.SelectOnMagCheckChanged += MyWebUserControl1_SelectOnMagCheckChanged;
        }

        private void MyWebUserControl1_SelectOnMagCheckChanged(object sender, EventArgs e)
        {
            var usercontrol = (WebUserControl1)sender;
            MyWebUserControl1.CheckboxLabel = $"Is checked: {usercontrol.IsChecked}";
        }


    }

Partha Mandayam 91 Reputation points

2023-08-28T15:31:40.46+00:00

Actually this is very old code and I have found that the checkedchanged event is not used at all

Instead following code is used in Render event to handle checkbox click

what exactly this is doing?

chkSelect.Attributes.Add("onclick", "javascript:appendActionGuid('" + ActionGUID + "', document.getElementById('" + chkSelect.ClientID + "'));appendCancelGuid('" + ActionGUID + "','" + chkIsCancelAvai + "',document.getElementById('" + chkSelect.ClientID + "'),'"+ EntiyGUID + "'); RedirectFromAction();"); chkSelectOnMag.Attributes.Add("onclick", "javascript:skm_LockScreen('{Processing...}');");
Bruce (SqlWork.com) 78,006 Reputation points Volunteer Moderator

2023-08-28T17:26:28.5466667+00:00

it is adding javascript event handlers that calls the javascript to the checkbox and the label. if setup correctly both event handlers fire when either the label or checkbox is clicked,

we have no idea what the javascript routines do.
Partha Mandayam 91 Reputation points

2023-08-28T19:11:30.2233333+00:00

Ok everyone. Thank you for your help.

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Breakpoint not getting hit inside user control in C#

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