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CTRL-A select all text in textBox

Posted on 2012-03-16
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Last Modified: 2012-06-27
OK I would like CTRL-A (on keyboard) to select all the text in my textBox1. Right now CTRL-A does nothing, even though my cursor is in the textBox1.
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Question by:deleyd
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by:paulmacd
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Is the text selectable?  CTRL-A should work by default, I believe...
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by:Rikin Shah
Rikin Shah earned 75 total points
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Hi deleyd,

Try this-
        private void textBox1_keyDown(object sender, KeyEventArgs e)
        {
            if (e.Control & e.KeyCode == Keys.A)
                textBox1.SelectAll();
        }

Regards,
Rikin.
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Expert Comment

by:käµfm³d 👽
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Are you doing any key press filtering? Barring that, I'd have to agree with paulmacd.
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Author Comment

by:deleyd
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OK I'll have a look at the textBox parameters. Maybe there's a setting somewhere I need to set from False to True.
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Expert Comment

by:käµfm³d 👽
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On further inspection, maybe it doesn't. I created a quick project, and it seems the key combination does not work as one would expect--though copy and paste key combinations did. It seems you may need rikin_shah's logic after all.
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Author Comment

by:deleyd
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Hmm, I don't see anything. I see AcceptsReturn and AcceptsTab. Nothing about selectable.
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by:nepaluz
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set the form's keypreview to true and handle the keyup event of the form. In there, check for the CTRL-A combination and also whether the textbox is currently selected then simply do copy textbox.text to clipboard
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by:käµfm³d 👽
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You shouldn't need KeyPreview for this task. KeyPreview is for the form to have a peek at (and possibly handle/suppress) the key being pressed before the control which is to process the key press receives the actual message stating a key was pressed.
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by:Mike Tomlinson
Mike Tomlinson earned 75 total points
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Ctrl-A works for me:  VS2010 on Win 7.
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Author Comment

by:deleyd
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Hmm, very strange it works for Idle_Mind. I have VS2010 on Vista. CTRL-A works for other programs.

Here's my Form1.Designer.cs stripped down:
  partial class Form1
  {
    private System.ComponentModel.IContainer components = null;

    protected override void Dispose(bool disposing)
    {
      if (disposing && (components != null))
      {
        components.Dispose();
      }
      base.Dispose(disposing);
    }

    #region Windows Form Designer generated code

    private void InitializeComponent()
    {
      this.textBox1 = new System.Windows.Forms.TextBox();
      this.textBox2 = new System.Windows.Forms.TextBox();
      this.SuspendLayout();
      //
      // textBox1
      //
      this.textBox1.Font = new System.Drawing.Font("Times New Roman", 26.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
      this.textBox1.Location = new System.Drawing.Point(9, 12);
      this.textBox1.Multiline = true;
      this.textBox1.Name = "textBox1";
      this.textBox1.Size = new System.Drawing.Size(669, 52);
      this.textBox1.TabIndex = 48;
      //
      // textBox2
      //
      this.textBox2.AcceptsReturn = true;
      this.textBox2.AcceptsTab = true;
      this.textBox2.Font = new System.Drawing.Font("Microsoft Sans Serif", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
      this.textBox2.Location = new System.Drawing.Point(12, 92);
      this.textBox2.Multiline = true;
      this.textBox2.Name = "textBox2";
      this.textBox2.Size = new System.Drawing.Size(666, 50);
      this.textBox2.TabIndex = 51;
      //
      // Form1
      //
      this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
      this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
      this.ClientSize = new System.Drawing.Size(703, 338);
      this.Controls.Add(this.textBox2);
      this.Controls.Add(this.textBox1);
      this.Name = "Form1";
      this.Text = "Form1";
      this.ResumeLayout(false);
      this.PerformLayout();

    }

    #endregion

    private System.Windows.Forms.TextBox textBox1;
    private System.Windows.Forms.TextBox textBox2;
  }
}

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Expert Comment

by:käµfm³d 👽
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Ctrl-A works for me:  VS2010 on Win 7.
My test was in XP, VS 2008. I didn't investigate too deeply, but the test was just a form with a TextBox--no logic.
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Expert Comment

by:Mike Tomlinson
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I didn't delve too deeply either; just a form with two textboxes and a button (no code).  It's possible that placing a different type of control on the form could be causing this issue.
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Author Comment

by:deleyd
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OK I tested and found if I make a test form with two textBoxes, and both textBoxes are Multiline text boxes, then CTRL-A doesn't work for either textbox. I wonder why that is?
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Accepted Solution

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Naman Goel earned 350 total points
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Yes, It's working even for me, My .net framework version is 2.0, IDE and OS doesn't matter in this case, the only thing is current focus should be on textbox

Here is the code for you

using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form2 : Form
    {
        private TextBox textBox1;

    
        public Form2()
        {
            InitializeComponent();
        }
      

        private void InitializeComponent()
        {
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.SuspendLayout();
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(23, 44);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(100, 20);
            this.textBox1.TabIndex = 0;
            // 
            // Form2
            // 
            this.ClientSize = new System.Drawing.Size(284, 262);
            this.Controls.Add(this.textBox1);
            this.Name = "Form2";
            this.ResumeLayout(false);
            this.PerformLayout();

        }

      

    }
}

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and if you want to  select all text in textbox even without having focus on textbox then you should set KeyPreview property to true and handle keyboard event on keydown like following code

using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form2 : Form
    {
        private Button button1;
        private TextBox textBox1;

    
        public Form2()
        {
            InitializeComponent();
        }
      

        private void InitializeComponent()
        {
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.button1 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(23, 44);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(100, 20);
            this.textBox1.TabIndex = 0;
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(34, 86);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 1;
            this.button1.Text = "button1";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // Form2
            // 
            this.ClientSize = new System.Drawing.Size(284, 262);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.textBox1);
            this.KeyPreview = true;
            this.Name = "Form2";
            this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form2_KeyDown);
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        private void Form2_KeyDown(object sender, KeyEventArgs e)
        {
            if (textBox1.Focused == false && textBox1.Text.Length > 0 && e.KeyCode == Keys.A && e.Control== true)
            {
                textBox1.SelectAll();
                textBox1.Select();
            }
        }

       

      

    }
}

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Author Closing Comment

by:deleyd
Comment Utility
OK I worked around it for now using your ideas thank you for the help.
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