asp.net append text in panel

Question

User-418973555 posted

trying to append label / text to second line in panel, but it only shows one line thats it

protected void btnSubmit_Click1(object sender, EventArgs e)
  {
   

    Session["cCounter"] = Convert.ToInt64(Session["cCounter"]) + 1;

    Literal ltbr = new Literal();
    ltbr.ID = "ltbr" + Session["cCounter"].ToString();
    ltbr.Text = "</br>";

    Label lblnewline = new Label();
    lblnewline.ID = "lblnewline" + Session["cCounter"].ToString();
    lblnewline.Text = "newline";

    pnlChatArea.Controls.Add(ltbr);
    pnlChatArea.Controls.Add(lblnewline);

    

  }

Answer 1

User-1038772411 posted

Hello larnvok09,

As you want to append label / text to second line in panel.

Try with this 

protected void btnSubmit_Click1(object sender, EventArgs e)
  {
   

    Session["cCounter"] = Convert.ToInt64(Session["cCounter"]) + 1;

    Literal ltbr = new Literal();
    ltbr.ID = "ltbr" + Session["cCounter"].ToString();
    ltbr.Text = "</br>";

    Label lblnewline = new Label();
    lblnewline.ID = "lblnewline" + Session["cCounter"].ToString();
    lblnewline.Text = "newline";

    pnlChatArea.Controls.Add(ltbr);
    pnlChatArea.Controls.Add(new LiteralControl("</br>"));
    pnlChatArea.Controls.Add(lblnewline);

    

  }

I hope this will help you.

Thank you.

Answer 2

User-418973555 posted

nope,

it only adds another </br> above the text 'new line',

Answer 3

User-1038772411 posted

hello larnvok09,

kindly refer the following link, i hope that will help you

https://forums.asp.net/t/2056673.aspx?Is+it+possible+to+insert+a+new+line+programmatically+

If you still don't get your expected output, kindly share snapshot of your output.

Thank you. 

Answer 4

User-418973555 posted

i think that example will only show one line,

the Button_Click1 is for inserting text 'new line' to the panel everytime it clicked,

eg. if clicked 9 times

output : 

newline
newline
newline
newline
newline
newline
newline
newline
newline



current output:

newline

Answer 5

User665608656 posted

Hi larnvok,

According to your description, the reason why you still have only one 'new line' from the second click is that the button refreshes the page, causing the controls that were added to the panel to be refreshed.

Therefore, I suggest that you store the current panel in the session after each panel content addition, and determine whether there is content in the session before adding controls to the panel.

If there is, loop the controls properties of the panel in the session.

Put all the original controls in the panel to store in a list first, and then loop this list and add the control to the current panel.

Finally, the subsequent add action is executed.

For more details, you could refer to the following code:

 protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                Session["cCounter"] = 0;
                Session["panelcontent"] = null;
            }
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            Session["cCounter"] = Convert.ToInt64(Session["cCounter"]) + 1;
            Literal ltbr = new Literal();
            ltbr.ID = "ltbr" + Session["cCounter"].ToString();
            ltbr.Text = "</br>";

            Label lblnewline = new Label();
            lblnewline.ID = "lblnewline" + Session["cCounter"].ToString();
            lblnewline.Text = "newline";

            if (Session["panelcontent"] != null)
            {
                Panel panel1 = Session["panelcontent"] as Panel;
                List<Control> controls = new List<Control>();
                foreach (Control item in panel1.Controls)
                {
                    controls.Add(item);
                }
                for (int i = 0; i < controls.Count; i++)
                {
                    pnlChatArea.Controls.Add(controls[i]);
                }
            }
            pnlChatArea.Controls.Add(ltbr);
            pnlChatArea.Controls.Add(lblnewline);

            Session["panelcontent"] = pnlChatArea;
        }

Here is the result of this work demo:

Best Regards,

YongQing.