Panel is inaccessible due to its protection level

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I have a panel control on frist.aspx pagewhich i want to access on other second.aspx page from frist.aspx page like following:

ASP.NET

<asp:Panel ID="postpanel" runat="server">

I used following code to access it on second.aspx.cs

C#

first d = new first();
                d.postpanel.Visible = false;

but it gives following error:
first.postpanel is inaccessible due to its protection level

What I have tried:

I have a panel control on frist.aspx pagewhich i want to access on other second.aspx page from frist.aspx page like following:

ASP.NET

<asp:Panel ID="postpanel" runat="server">

I used following code to access it on second.aspx.cs

C#

first d = new first();
                d.postpanel.Visible = false;

but it gives following error:
first.postpanel is inaccessible due to its protection level

Posted 13-Apr-16 21:47pm

Kishor-KW

Updated 13-Apr-16 21:59pm

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Comments

Karthik_Mahalingam 14-Apr-16 4:08am

you cannot make the panel visible/invisible by creating a new instance of the page.
its of no use;

Kishor-KW 14-Apr-16 5:04am

but why? I want to make it invisible on one condition. what should i do?

Karthik_Mahalingam 14-Apr-16 5:09am

You can make it visible only in its code behind file or in master page file.
if you try to make it visible in a new instance, the visible property will be in that particular instance only, not the page loaded in the browser.

Kishor-KW 14-Apr-16 5:13am

ok thanx

Kishor-KW 14-Apr-16 5:12am

Object reference not set to an instance of an object.

this is the error occured

Karthik_Mahalingam 14-Apr-16 9:26am

ok. expected result

1 solution

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Shmuel Zang · Accepted Answer · 2016-04-13T21:59:00

As the error says, postpanel is defined as a protected member. If you want to access it outside of the first class, you can define a public property (in first.aspx.cs) that exposes it. Something like:

C#

public partial class first : System.Web.UI.Page
{
    // ...

    public Panel PostPanel
    {
        get { return postpanel; }
    }

    // ...
}

C#

first d = new first();
d.PostPanel.Visible = false;

But, as KARTHIK Bangalore wrote, I don't see any reason of doing that.