textbox_textchange event not firing

Question

0.00/5 (No votes)

See more:

Hi guys,

Im having a problem with the textbox_textchanged event.

What i want: When I enter a number in textbox1, some math manipulation happens and the answer is displayed in textbox2. So everytime the user changes textbox1 values the answer in textbox2 should automatically change.

Now when i try to change the input value (when i backspace) the answer just goes to 0, and does changed again when I input a new value.

Am i using the wrong textbox event?

C#

private void textBox9_TextChanged(object sender, EventArgs e)
        {
            // Output Min and Max

            MaxC = Math.Round((CVAL * (1 + range)), 3);
            MinC = Math.Round((CVAL * (1 - range)), 3);
            MaxP = Math.Round((pVAL * (1 + range)), 3);
            MinP = Math.Round((pVAL * (1 - range)), 3);
            Maxsi = Math.Round((siVAL * (1 + range)), 3);
            Minsi = Math.Round((siVAL * (1 - range)), 3);
            Maxsc = Math.Round((scrap * (1 + range)), 3);
            Minsc = Math.Round((scrap * (1 - range)), 3);
            Maxtemp = Math.Round((temp * (1 + range)), 3);
            Mintemp = Math.Round((temp * (1 - range)), 3);

            textBox2.Text = Convert.ToString(MaxC);
            textBox4.Text = Convert.ToString(MinC);
            textBox10.Text = Convert.ToString(MaxP);
            textBox6.Text = Convert.ToString(MinP);
            textBox12.Text = Convert.ToString(Maxsi);
            textBox11.Text = Convert.ToString(Minsi);
            textBox14.Text = Convert.ToString(Maxsc);
            textBox13.Text = Convert.ToString(Minsc);
            textBox16.Text = Convert.ToString(Maxtemp);
            textBox15.Text = Convert.ToString(Mintemp);
        }

The variable "range" is the input from textBox9

Posted 27-Feb-12 21:37pm

nikki88

Updated 27-Feb-12 22:00pm

v2

Add a Solution

Comments

OriginalGriff 28-Feb-12 3:40am

Unlikely - but we need to see the code for your TextBox.TextChanged event.
Use the "Improve question" widget to edit your question and provide better information.

P.Salini 28-Feb-12 3:44am

post your code so that we can help you

nikki88 28-Feb-12 4:05am

Thanks, I've posted my code

2 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)

Bikash Shrestha From Nepal · Answer 1 · 2012-02-27T21:54:00

Solution 1

set the property(of your textbox) AutoPostBack =true

Posted 27-Feb-12 21:54pm

Bikash Shrestha From Nepal

Comments

Dhol Gaurav 28-Feb-12 4:02am

Bikash there are no AutoPostBack property in case of Windows Application

nikki88 · Answer 2 · 2012-02-27T22:12:00

This correct seems to have solved the problem, thanks guys

C#

<pre lang="cs">private void textBox9_TextChanged(object sender, EventArgs e)
        {
            // Output Min and Max




           if  ((string.IsNullOrWhiteSpace(textBox9.Text)))

           {
               textBox2.Text = "";
            textBox4.Text = "";
            textBox10.Text = "";
            textBox6.Text = "";
            textBox12.Text = "";
            textBox11.Text = "";
            textBox14.Text = "";
            textBox13.Text = "";
            textBox16.Text = "";
           }

           else
           {

            range = Convert.ToDouble(textBox9.Text.Trim());

            MaxC = Math.Round((CVAL * (1 + range)), 3);
            MinC = Math.Round((CVAL * (1 - range)), 3);
            MaxP = Math.Round((pVAL * (1 + range)), 3);
            MinP = Math.Round((pVAL * (1 - range)), 3);
            Maxsi = Math.Round((siVAL * (1 + range)), 3);
            Minsi = Math.Round((siVAL * (1 - range)), 3);
            Maxsc = Math.Round((scrap * (1 + range)), 3);
            Minsc = Math.Round((scrap * (1 - range)), 3);
            Maxtemp = Math.Round((temp * (1 + range)), 3);
            Mintemp = Math.Round((temp * (1 - range)), 3);

            textBox2.Text = Convert.ToString(MaxC);
            textBox4.Text = Convert.ToString(MinC);
            textBox10.Text = Convert.ToString(MaxP);
            textBox6.Text = Convert.ToString(MinP);
            textBox12.Text = Convert.ToString(Maxsi);
            textBox11.Text = Convert.ToString(Minsi);
            textBox14.Text = Convert.ToString(Maxsc);
            textBox13.Text = Convert.ToString(Minsc);
            textBox16.Text = Convert.ToString(Maxtemp);
            textBox15.Text = Convert.ToString(Mintemp);
            }