How to get the ID of the selected row in the ListView with Ajax ModalPopUpExtender control?

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C#

ASP.NET

ListView

I have a ListView that shows the suggestions submitted by the employees. In the last column of this ListView, I have a (Status) column that will be updated by the Admin. When the Admin clicks on it, a ModalPopUpExtender will be opened with RadioButtonList that shows the possible options for (Status). Anyway, I need now to get the ID of the row where the Admin clicked on the Status cell of that suggestion. I need in order to use it later on for sending an email notification to the owner of that suggestion.
I already did of all this but for GridView control as following:

protected void lnkSuggestionStatus_Click(object sender, EventArgs e)
    {
        LinkButton lnkSuggestionStatus = sender as LinkButton;

        //var safetySuggestionsId =

        //get reference to the row selected
        GridViewRow gvrow = (GridViewRow)lnkSuggestionStatus.NamingContainer;

        //set the selected index to the selected row so that the selected row will be highlighted
        GridView1.SelectedIndex = gvrow.RowIndex;

        //This HiddenField used to store the value of the ID
        HiddenField1.Value = GridView1.DataKeys[gvrow.RowIndex].Value.ToString();
        //ViewState["Username"] = gvrow.Cells[4].Text;

        //show the modalPopUp
        modalPopUpExtender1.Show();
    }

But I need it now for the ListView, **so How to do that?**

Current Code-Behind:

protected void lnkSuggestionStatus_Click1(object sender, EventArgs e)
    {
        LinkButton lnkSuggestionStatus1 = sender as LinkButton;

        //show the modalPopUp
        modalPopUpExtender2.Show();
    }