If We Have Number Of Textbox And I Want To Clear One Textbox Not Other

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i am new to c# and i want to select one textbox ...by one button
clear only those textbox which i selected by cursors. thanks...

Posted 6-Jan-14 8:15am

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CHill60 6-Jan-14 14:28pm

What have you tried so far and where are you stuck?

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OriginalGriff · Answer 1 · 2014-01-06T08:29:00

All of that is dependant on how you "select a textbox" - a textbox doesn't have a "select" function, so either you will have to add that to your textboxes, or you will have to add an external control (such as a CheckBox) which the user can use to indicate if the textbox should be considered selected or not.

If you do that, you could use the TextBox.Tag property to indicate if the textbox is selected and it's simple. If we assume that a null value in a Tag indicates not selected, and anything else means "selected" then:

C#

foreach (Control c in Controls)
   {
   TextBox tb = c as TextBox;
   if (tb != null && tb.Tag != null)
      {
      tb.Text = "";
      tb.Tag = null;
      }
   }

But how to select the boxes is up to you.

Manfred Rudolf Bihy · Answer 2 · 2014-01-06T11:34:00

Since you said something about "selected by cursors" I thought maybe you wanted a solution where you clicked into a textbox or even tabbed to it and then by pressing the delete button it would clear the textbox that last got the focus.

C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace DeleteSelectedTextbox
{
    public partial class Form1 : Form
    {
        private TextBox lastFocusedTextBox = null;
        public Form1()
        {
            InitializeComponent();
        }

        private void textBox_Enter(object sender, EventArgs e)
        {
            TextBox tb = (TextBox)sender;
            lastFocusedTextBox = tb;
            label1.Text = String.Format("Last focused textbox's name: {0}", tb.Name);

        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (lastFocusedTextBox != null)
            {
                lastFocusedTextBox.Clear();
            }
        }
    }
}

Use the same event handler for all of the textboxes on your form i.e. textbox_Enter.

Regards,

— Manfred

Figure 1: Example form remembering the last focused textbox

If We Have Number Of Textbox And I Want To Clear One Textbox Not Other

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