How to show the controls

Question

Dear All,

The following code is copied from the web page https://www.geeksforgeeks.org/c-sharp-tooltip-class/. Then I created a new project "TooltipTest" and copied the code to test the code. However, when I ran the form all controls disappeared.

My question is how to show the controls?

The code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;using

namespace
 
public
 
    public
    {
        InitializeComponent();
    }
 
    private
    {
        // Creating and setting the
        // properties of the Label
        Label l1 = new
        l1.Location = new
        l1.Text = "Name";
 
        // Adding this Label
        // control to the form
        this.Controls.Add(l1);
 
        // Creating and setting the
        // properties of the TextBox
        TextBox box1 = new
        box1.Location = new
        box1.BorderStyle = BorderStyle.FixedSingle;
 
        // Adding this TextBox
        // control to the form
        this.Controls.Add(box1);
 
        // Creating and setting the
        // properties of Label
        Label l2 = new
        l2.Location = new
        l2.Text = "Password";
 
        // Adding this Label
        // control to the form
        this.Controls.Add(l2);
 
        // Creating and setting the
        // properties of the TextBox
        TextBox box2 = new
        box2.Location = new
        box2.BorderStyle = BorderStyle.FixedSingle;
 
        // Adding this TextBox
        // control to the form
        this.Controls.Add(box2);
 
        // Creating and setting the
        // properties of the ToolTip
        ToolTip t_Tip = new
        t_Tip.Active = true;
        t_Tip.AutoPopDelay = 4000;
        t_Tip.InitialDelay = 600;
        t_Tip.IsBalloon = true;
        t_Tip.ToolTipIcon = ToolTipIcon.Info;
        t_Tip.SetToolTip(box1, "Name should start with Capital letter");
        t_Tip.SetToolTip(box2, "Password should be greater than 8 words");
    }
}
}

The Project:

When I ran the code, no controls on the form:

Answer 1

Probably the Form1_Load function is not executed. Open the Designer of the form, select the form, go to Properties, to Events tab. For the Load event, select Form1_Load.

Answer 2

You are missing

• The project namespace name (1)
• The form name e.g. Form1 (2)
• The form name e.g. Form1() (3)
• Method name (4)
• using System.Windows.Forms;using is incorrect

Answer 3

Hi @BenTam-3003 , Welcome to Microsoft Q&A,

You are missing some necessary elements. The correct code should be:

using System;
using System.Drawing;
using System.Windows.Forms;

namespace xxx
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            Form1_Load(null, null);
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            // Creating and setting the
            // properties of the Label
            Label l1 = new Label();
            l1.Location = new Point(140, 122);
            l1.Text = "Name";

            // Adding this Label
            // control to the form
            this.Controls.Add(l1);

            // Creating and setting the
            // properties of the TextBox
            TextBox box1 = new TextBox();
            box1.Location = new Point(248, 119);
            box1.BorderStyle = BorderStyle.FixedSingle;

            // Adding this TextBox
            // control to the form
            this.Controls.Add(box1);

            // Creating and setting the
            // properties of Label
            Label l2 = new Label();
            l2.Location = new Point(140, 152);
            l2.Text = "Password";

            // Adding this Label
            // control to the form
            this.Controls.Add(l2);

            // Creating and setting the
            // properties of the TextBox
            TextBox box2 = new TextBox();
            box2.Location = new Point(248, 145);
            box2.BorderStyle = BorderStyle.FixedSingle;

            // Adding this TextBox
            // control to the form
            this.Controls.Add(box2);

            // Creating and setting the
            // properties of the ToolTip
            ToolTip t_Tip = new ToolTip();
            t_Tip.Active = true;
            t_Tip.AutoPopDelay = 4000;
            t_Tip.InitialDelay = 600;
            t_Tip.IsBalloon = true;
            t_Tip.ToolTipIcon = ToolTipIcon.Info;
            t_Tip.SetToolTip(box1, "Name should start with Capital letter");
            t_Tip.SetToolTip(box2, "Password should be greater than 8 words");
        }
    }
}

Best Regards,

Jiale

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