I want to remove any leading spaces within a TextBox in my windows forms application using .net [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 10 years ago.

not allowing first character as spaces after textbox allow spaces in windows form application like

       textb开发者_如何学编程ox1.text="   fg";  //----------- not like
       textbox1.text="vcvc   hfh"; //------------Like this 

---

You could place this code in the TextChanged event or OnKeyDown event (or you could use it whenever you want)

string myString = textBox1.Text.TrimStart()

or even straight to the point

textBox1.Text = textBox1.Text.TrimStart()

---

This will avoid space at the start of the textbox1

void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
     if ((sender as TextBox).SelectionStart == 0)
          e.Handled = (e.KeyChar == (char)Keys.Space);
     else
          e.Handled = false;
}

Link

---

You could also use a regular expression to remove leading white space by substituting the leading white space with an empty string (""). In this example, " Hello " would become "Hello ":

String result = Regex.Replace(textbox1.text, "^[ \t\r\n]", "");

Similarly, you could strip trailing white space. In this example, " Hello " would become " Hello":

String result = Regex.Replace(textbox1.text, "[ \t\r\n]+$", "");

If you use the pipe operator ( "|" ), you can give both patterns in the same expression to strip both leading and trailing white space. This is the particular one I use in my C# project. It is the .NET equivalent to the Perl chomp command. In this example, " Hello " would become "Hello":

String result = Regex.Replace(textbox1.text, "^[ \t\r\n]+|[ \t\r\n]+$", "");

For a slew of really great tutorial, examples, and reference information on .NET regular expressions, see this site:

• http://www.regular-expressions.info/examples.html

Note: To use regular expressions in C#, you must add using System.Text.RegularExpressions; to the top of your C# file.

Note also: If you prefer, you can substitute [ \t\r\n] for the [\s] white space operator.

---

Why not just Trim() the text when you're ready to use it?

---

To Remove All Space in your Text Even in Start, Middle or End

Here's my Code

using System.Text.RegularExpressions;

txtAfter.Text = Regex.Replace(txtBefore.Text, " ", "");

---

You could test to see if the key down is the spacebar, or trim it. Perhaps.