How to handle exception outside of page?

I have a C# project and I am trying to convert it to ASP.NET and C#. This is my first ASP.NET project.

My users have really liked my former project because it is flexible and easy to use. I am trying to duplicate it as much as possible.

I have designed a page called DM_Services.aspx with 3 panels:

• Panel 1 has a search button and several fields for filtering
• Panel 2 has several fields for editing
• Panel 3 has a gridview.

The ultimate goal is that the user can enter the filters and click search to load data in the gridview.

The user can click on a row in the gridview and it will load the fields in panel 2 with the data for viewing and editing.

I have a C# file called SQLControl.cs which I am using to manage data access.

I keep getting an error on that page in the HasException section.

If I use the following line:

ClientScriptManager.RegisterOnSubmitStatement(Me.GetType(), "ConfirmSubmit", exception);

I get the following error:

The name ‘Me’ does not exist in the current context

If I use:

ScriptManager.RegisterStartupScript(Page, this.GetType(), "alert", "alert(exception);", true);

I get the error:

‘Page’ is a type which does not exist in the current context

If I use the following line:

ScriptManager.RegisterStartupScript(This, this.GetType(), Guid.NewGuid().ToString("N"), "alert(exception);", true);

I get this error:

The name ‘This’ does not exist in the current context

And if I use:

ScriptManager.RegisterStartupScript(this, this.GetType(), Guid.NewGuid().ToString("N"), "alert(exception);", true);

Then I get this error:

Argument 1: cannot convertfrom ‘Productivity_ASPWeb.SQLControl’ to ‘System.Web.UI.Control’

I am pretty sure I am getting this error because it is in SQLControl.cs which is outside of the page.

So how do I handle the exception then?

    public bool HasException(bool Report = false)
    {
        if (string.IsNullOrEmpty(exception))
            return false;

        if (Report == true) 
            ClientScriptManager.RegisterOnSubmitStatement(Me.GetType(), "ConfirmSubmit", exception);

        ScriptManager.RegisterStartupScript(Page, this.GetType(), "alert", "alert(exception);", true);
        ScriptManager.RegisterStartupScript(this, this.GetType(), Guid.NewGuid().ToString("N"), "alert(exception);", true);
        ScriptManager.RegisterStartupScript(This, this.GetType(), Guid.NewGuid().ToString("N"), "alert(exception);", true);

        return true;
    }

Answers:

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Method 1

I removed the scriptManager from the SQLControl.cs and changed the code to:

        public bool HasException(bool Report = false)
    {
        if (string.IsNullOrEmpty(exception))
            return false;
        else
        return true;
    }

I then put the scriptmanager in the aspx page:

    protected void Page_Load(object sender, EventArgs e)
    {
        ScriptManager.RegisterStartupScript(Page, this.GetType(), "alert", "alert(exception);", true);
    }

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