c# make text this appear when condition is complete

this.labelStart.Text = "Hello World";

when user select  both folder the label  "Hello World" still not appear how can I clear it
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;
using System.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog dlg = new FolderBrowserDialog();
            if (dlg.ShowDialog() == DialogResult.OK)
            {
                sorrceTextbox.Text = dlg.SelectedPath;
            }


        }


        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog dlg2 = new FolderBrowserDialog();
            if (dlg2.ShowDialog() == DialogResult.OK)
            {
                destTextbox.Text = dlg2.SelectedPath;
            }

        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

        private void startcopy_Click(object sender, EventArgs e)
        {
            if (String.IsNullOrEmpty(sorrceTextbox.Text) || String.IsNullOrEmpty(destTextbox.Text))
            {
               this.labelStart.Text = "Hello World";
            }
        }

        private void label1_Click(object sender, EventArgs e)
        {
            
        }


    }
}

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teeraAsked:
Who is Participating?
 
AnilKumarSharmaConnect With a Mentor Commented:
First you need to understand when the label will appear. Your code shows that it will appear when you click startcopy button.
Secondly you need to clear what condition is given in startcopy to display the label. It is if ANY of the text box (source or destination is empty then show the label. Looks that in your conditon you already clciked both buttons button1 and button2 that cause both text box to be filled with some path. Now the startcopy will never be true and hence it will never print the "helloworld". You can do the following to clear the text box.
In this case even when you clciked the button1 and button2, it will clear the both text boxs and then when you click again the startcopy , it will display the hello world. Note that you need to sure at what condtion you like to display the hello world. You can change that. The code is attached.
private void startcopy_Click(object sender, EventArgs e)
        {
            if (String.IsNullOrEmpty(sorrceTextbox.Text) || String.IsNullOrEmpty(destTextbox.Text))
            {
                this.labelStart.Text = "Hello World";
            }
            sorrceTextbox.Text = "";
            destTextbox.Text = "";


        }

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0
 
käµfm³d 👽Commented:
Your condition, as I read it, is to show "Hello World" when either box has no text in it (i.e. either one or both are empty). Is that correct?
0
 
teeraAuthor Commented:
hi      kaufmed

 yes
 
hi     AnilKumarSha…

 I want word  "Hello World"  world this apear  

   like when user select sorce and destination then program start to copy

0
 
käµfm³d 👽Connect With a Mentor Commented:
>>  like when user select sorce and destination then program start to copy

It's not going to show when your user selects from the two dialogs because you set it to show ONLY when 1 or both boxes don't have anything in them. I think you mean the following:
private void startcopy_Click(object sender, EventArgs e)
{
    if (!String.IsNullOrEmpty(sorrceTextbox.Text) && !String.IsNullOrEmpty(destTextbox.Text))
    {
        this.labelStart.Text = "Hello World";
    }
}

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