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Updated on 2025-03-06

C# winformTextBox keyboard monitoring method

C# winformTextBox keyboard monitoring

Step 1: Add listening

Method 1: Add listening in Designer

this. = new (12, 5);
this. = true;
this. = "textBox1";
this. = new (548, 188);
this. = 0;
this. += new (this.textBox1_TextChanged);
this. += new (this.textBox1_KeyDown);//Add a keyboard event

Method 2: Add listening in CS code

public Form1()
        {
            InitializeComponent();
             += new EventHandler(textBox1_TextChanged);
            +=new KeyEventHandler(textBox1_KeyDown);//Add a keyboard event        }

Step 2: Listen to events

Example:

Add Ctrl+A Select all event

        /// &lt;summary&gt;
        /// Control Event        /// &lt;/summary&gt;
        /// &lt;param name="sender"&gt;&lt;/param&gt;
        /// &lt;param name="e"&gt;&lt;/param&gt;
        private void textBox1_KeyDown(object sender,  e)
        {
            if ( ==  &amp;&amp; )
            {
                ();
            }
        }

Summarize

The above is personal experience. I hope you can give you a reference and I hope you can support me more.