C# 如何添加自定义键盘处理事件 如何配置app.config ? | csharp key press event tutorial and app.config

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csharp key press event tutorial and app.config

Guide

MainForm

 protected override bool ProcessCmdKey(ref Message msg, Keys keyData)

        {

            //System.Console.WriteLine("ProcessCmdKey " + cur_image_id);

            //capture up arrow key

            if (keyData == Keys.Left)

            {

                //this.button_prev.PerformClick();

                button_prev_click();

                return true;

            }

            else if (keyData == Keys.Right)

            {

                //System.Console.WriteLine("Enter "+cur_image_id);

                //this.button_ok.PerformClick();

                button_ok_click();

                return true;

            }

            return base.ProcessCmdKey(ref msg, keyData); // trigger 2 button_ok_click

        }

TextBox

private void textBox_index_KeyDown(object sender, KeyEventArgs e)

        {

            if (e.KeyCode == Keys.Enter)

            {

                //enter key is down

                button_goto_click();

            }

        }

app.config

app.config.xml

<?xml version="1.0" encoding="utf-8" ?>

<configuration>

    <startup>

        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />

    </startup>

    <appSettings>

      <add key="image_extension" value="png" />

      <add key="output_filepath" value="./output.json" />

    </appSettings>

</configuration>

usage

using System.Configuration;

private void init_config()

        {

            var appSettings = System.Configuration.ConfigurationManager.AppSettings;

            string image_ext = "*."+ appSettings["image_extension"];

            string output_filepath = appSettings["output_filepath"];

        }

Reference

• enter-key-pressed-event-handler

History

• 20190919: created.

Copyright

• Post author: kezunlin
• Post link: https://kezunlin.me/post/9f24ebb5/
• Copyright Notice: All articles in this blog are licensed under CC BY-NC-SA 3.0 unless stating additionally.