I just started to learn how to draw using the Graphics class in C# but there is this one error in my project in a script called ,"Form1.Designer.cs". Here is the code:

    namespace Pong
{
    partial class FrmMain
    {
        /// <summary>
        ///  Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        ///  Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        ///  Required method for Designer support - do not modify
        ///  the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.SuspendLayout();
            // 
            // FrmMain
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
            this.ClientSize = new System.Drawing.Size(1008, 729);
            this.Name = "FrmMain";
            this.Text = "PONG";
            this.Load  = new System.EventHandler(this.FrmMain_Load);
            this.ResumeLayout(false);

        }

        #endregion
    }
}

The Line that has "this.Load = new System.EventHandler(this.FrmMain_Load);" is the part that is the error. This is the error code I got in the output:

I have a script that makes the graphic called ,"Form1.cs" ,that calls the InitializeComponent() function:

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;

namespace Pong
{
    public partial class FrmMain : Form
    {
        public FrmMain()
        {
            InitializeComponent();
        }

        private void FrmMain_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            Brush whiteBrush = new SolidBrush(Color.White);

            g.FillRectangle(whiteBrush, 50, 50, 100, 100);
        }
    }
}

I am not the best at debugging, so if anyone could debug this glitch it would be very helpful. Thank you!

CodePudding user response：

The error message is telling you exactly what the problem is. Your designer code is trying to register a handler for the form's Load event but there is no method with the specified name. Why is that the case in the first place? I'm guessing that you deleted that method while it was still registered as an event handler. Don't do that because this is what happens. If you want to delete an event handler then you have to remove the registration first, which you do in the Properties window of the designer.

Now that you're in this situation, you can just delete that line from the designer code file and that will fix the issue. If you don't try to register a nonexistent method as an event handler then you won't have that problem.

CodePudding user response：

The error is because the FrmMain_Load event handler method is not defined in the "Form1.cs" script. To fix it, you need to add the FrmMain_Load method to the "Form1.cs" script:

private void FrmMain_Load(object sender, EventArgs e)
{
    // your code here
}