How to get id value when try to loop within repeater control?

Question

I working on asp.net web forms. I can't get value of id inside repeater control.

i need to get id when loop within repeater control

string Id = gvr.Items[5].ToString();

what I do within code is :

1- click on print button to update status column on database based on id if checkbox checked

2- then after that will loop within repeater control to get checkbox value have checked true

3-get id from repeater and update on database column status with true when checkbox checked is true .

what I try as below :

protected void Print_Click(object sender, EventArgs e)
    {
        int counter = 0;
        foreach (RepeaterItem gvr in repPSStatus.Items)
        {

            if (((System.Web.UI.WebControls.CheckBox)gvr.FindControl("chkSel")).Checked == true)
            {
                string Id = gvr.Items[5].ToString();// here is issue 
  
                string msg = busiObj.updatestatus(Id);
                if (msg == "SUCCESS")
                {
                    counter = counter + 1;
                }

            }
        }

    }
and on reprint.aspx page

 
    <thead>
    
    
    
    
    </thead>
    <tbody>
    <asp:Repeater runat="server" ID="repPSStatus">
    <ItemTemplate>
    
    
    
    
    </ItemTemplate>
    </asp:Repeater>
    </tbody>
    

Answer 1

what i need actually get value of id that have checkbox checked

i need to modify this line to get id value from repeater

string Id = gvr.Items[id].ToString();// here is issue

Answer 2

Your code do not show what is inside Repeater, we have no idea what is inside, it can have just a control or a bunch of nested controls.
Best I can suggest (following AgaveJoe), is use FindControl as you made to get Checkbox.Checked.
Use grv.Items[5].FindControl(<place control ID here>)