无法生成错误消息：“ Form1_Load”没有重载匹配委托“事件处理程序”

Question

i am trying to make a program that when i press F, it waits a few seconds then presses Enter. But i get an error saying

No overload for'Form1_Load' matches delegate 'Event Handler

Here is my Form1.Designer.cs:

namespace csgossprogram
{
    partial class Form1
    {
        /// <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.button1 = new System.Windows.Forms.Button();
        this.SuspendLayout();
        // 
        // button1
        // 
        this.button1.Location = new System.Drawing.Point(102, 114);
        this.button1.Name = "button1";
        this.button1.Size = new System.Drawing.Size(75, 23);
        this.button1.TabIndex = 0;
        this.button1.Text = "button1";
        this.button1.UseVisualStyleBackColor = true;
        // 
        // Form1
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(284, 264);
        this.Controls.Add(this.button1);
        this.Name = "Form1";
        this.Text = "Form1";
        this.Load += new System.EventHandler(this.Form1_Load);
        this.ResumeLayout(false);

    }

    #endregion

    private System.Windows.Forms.Button button1;
}
}

And here is my code for Form1.cs

 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 csgossprogram
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.F)
            {
                SendKeys.Send("~");
            }
        }
    }
}

Answer 1

It should be private void Form1_Load(object sender, EventArgs e) , not private void Form1_Load(object sender, KeyEventArgs e) .

Form.Load event MSDN page .

Answer 2

Using Form.Load event in this manner has no any point. It is invoked when form loads and there is no key to check if it is F. That's also why Form.Load expects handler with Form1_Load(object sender, EventArgs e) signature.

To do what you wanted you should use Form.KeyDown or Form.KeyUp event: 1. Rename Form1_Load to Form1_KeyDown or Form1_KeyUp , depending what you have chosen to use. This is optional but it's better to do it so you keep naming consistent. 2. Instead: this.Load += new System.EventHandler(this.Form1_Load); use either this.Load += this.Form1_KeyDown; or this.Load += this.Form1_KeyUp; depending on event you have chosen.

Note, you don't have to use constructor for delegate. Just write method name after += (you can omit this , too).