how to detect and replace a value entered in the text box with a new value in C#?

Question

0.00/5 (No votes)

See more:

Hi,

I have a text box which accepts numeric and decimal values.

so now when the user selects the entire or part of the of the text in the text box and try to replace with a new value how can i do it?

please provide a sample code as am new to C#?

Posted 12-Mar-14 22:49pm

Member 10593922

Add a Solution

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2014-03-12T23:16:00

Solution 1

Just handle the TextChanged event - you get it when any change happens to the text, even if they replace the whole lot.

Posted 12-Mar-14 23:16pm

OriginalGriff

Comments

Member 10593922 13-Mar-14 5:18am

in text changed event what code i have to write?

OriginalGriff 13-Mar-14 5:22am

What code are you using at the moment?

Marcin Kozub · Answer 2 · 2014-03-12T23:21:00

Solution 2

Hi,

Some useful textbox control properties, methods and events:
Events:
1. TextChanged - Raised when content of Text property was changed
Properties:
1. TextBox.SelectedText - Allows you to get or set currently selected text
2. TextBox.SelectionStart - Gets or sets index of first selected character (0-based).
3. TextBox.SelectionLength - Gets or sets length of selected text

Methods:
1. TextBox.Select(start, length) - Allows you to select text from start index (0-based) with given length
2. TextBox.SelectAll() - Selects all text

Posted 12-Mar-14 23:21pm

Marcin Kozub

Updated 12-Mar-14 23:23pm

v3

Comments

Member 10593922 13-Mar-14 5:23am

thank u for the reply... am trying to use textbox.selectText event.. so can you please provide me a sample to replace the old value with the newly selected value in C#

Marcin Kozub 13-Mar-14 5:24am

Please share your code

Member 10593922 13-Mar-14 5:32am

if (txtPlannedHours.Text.Length > 0 )
{
txtPlannedHours.Text = txtPlannedHours.Text.Replace(txtPlannedHours.SelectedText, " ");
}

so now instead of null value , i want to display the value what the user has entered after selecting the entire or part of the text in the text box

Krunal Rohit · Answer 3 · 2014-03-12T23:47:00

Solution 3

See my past answer:
Can anyone send me the code for find and replace if I send my Projects Source code in rar format[^]

-KR

Posted 12-Mar-14 23:47pm

Krunal Rohit