Solved

delete last character in textbox

Posted on 2012-03-15
5
954 Views
Last Modified: 2012-03-16
I have a textbox, textBox1, with some text in it. User presses 'Delete' key, I want to delete last character in textbox1. What is command to do that?

(sort of the opposite of textBox1.AppendText)

(cursor is not in textbox. Actually I have two textboxes I need to remove last character from.)
0
Comment
Question by:deleyd
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
5 Comments
 
LVL 53

Expert Comment

by:Dhaest
ID: 37728055
Where does the user press delete ? On our form, in a textbox , ...

textBox1.Text.Remove(textBox1.Text.Length - 1, 1);



HOW TO: Remove Last Character from String
http://blogs.x2line.com/al/archive/2008/03/10/3369.aspx
0
 
LVL 53

Assisted Solution

by:Dhaest
Dhaest earned 167 total points
ID: 37728069
KeyPreview  to true in the Form1

        private void Form1_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.KeyCode==Keys.Delete && textBox1.Focused==false)
                textBox1.Text.Remove(textBox1.Text.Length - 1, 1);
        }
0
 
LVL 20

Assisted Solution

by:BuggyCoder
BuggyCoder earned 166 total points
ID: 37728122
Here is another way to do it:-

private void Form1_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.KeyCode==Keys.Delete && textBox1.Focused==false)
            {
                var textRead = textBox1.Text;
                textBox1.Text = textRead .Remove(textRead .Length-1)
                //OR
                //textBox1.Text=textRead .Substring(0,textRead .Length-1);
           }
         }

Open in new window

0
 
LVL 13

Accepted Solution

by:
Naman Goel earned 167 total points
ID: 37728356
Here is code for this:

for this you need to set the KeyPreview property of container(in my case form) control to true and put your logic for last character removal.

using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form2 : Form
    {
        private TextBox textBox1;
        private TextBox textBox2;
        private Button button1;

    
        public Form2()
        {
            InitializeComponent();
        }
      

        private void InitializeComponent()
        {
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.textBox2 = 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;
            // 
            // textBox2
            // 
            this.textBox2.Location = new System.Drawing.Point(139, 44);
            this.textBox2.Name = "textBox2";
            this.textBox2.Size = new System.Drawing.Size(100, 20);
            this.textBox2.TabIndex = 1;
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(88, 91);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 2;
            this.button1.Text = "button1";
            this.button1.UseVisualStyleBackColor = true;
            // 
            // Form2
            // 
            this.ClientSize = new System.Drawing.Size(284, 262);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.textBox2);
            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 (e.KeyCode == Keys.Delete)
            {
                foreach (Control control in Controls)
                {
                    if (control is TextBox)
                    {
                        TextBox textBox = control as TextBox;

                        RemoveLastCharacter(textBox);
                    }
                }
            }
        }

        private void RemoveLastCharacter(TextBox textBox)
        {

            if (textBox.Text.Length > 0)
            {
                textBox.Text = textBox.Text.Remove(textBox.Text.Length - 1);
            }
        }
    }
}

Open in new window

0
 

Author Closing Comment

by:deleyd
ID: 37729498
textBox has a .Remove, that's what I needed.

Thank you everyone!

Oh I see, it's textBox.Text that has the .Remove

That's why I couldn't find it. Hmm, still can't find it. Oh I bet I have to look at String.Remove

textBox.Text gives me a string. Ah yes, that's it.
0

Featured Post

Salesforce Made Easy to Use

On-screen guidance at the moment of need enables you & your employees to focus on the core, you can now boost your adoption rates swiftly and simply with one easy tool.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In my previous two articles we discussed Binary Serialization (http://www.experts-exchange.com/A_4362.html) and XML Serialization (http://www.experts-exchange.com/A_4425.html). In this article we will try to know more about SOAP (Simple Object Acces…
Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

739 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question