How to clear a text box if the other textbox value has been changed

Question

1.00/5 (1 vote)

See more:

Hello

Say i 3 textboxes, the are named val1 , val2 and res. I show the addition result of values in val1 and val2 in res. So, if a user alters these values(i-e the values present in val1 and val2) res should be cleared. Example user enterd 2 in val1 and 3 in val2 so the addition result is 5 which is being shown in red textbox now say now user decides to change the value in val1 so when he begins to change i want my res text box to be cleared.

Beginner so please pardon my average questions

Thanks anyways

Posted 26-Dec-13 13:10pm

loraloper_22

Updated 26-Dec-13 13:14pm

v2

Add a Solution

Comments

BillWoodruff 26-Dec-13 20:06pm

What event triggers the addition operation and the result being displayed in 'res ? Are you validating that both 'val1 and 'val2 contain numeric input ?

2 solutions

Solution 2

Here's one option, use javascript's onkeyup event on the client side to clear the result. When the user selects the val1 control and presses and releases a key the result value will be set to an empty string.

ASP.NET

<script type="text/javascript">
    // clear result
    function ResetResultValue() {
        var el = document.getElementById('<%= res.ClientID %>');
        el.value = '';
    }
</script>
    
<asp:textbox id="val1" runat="server" onkeyup="javascript:ResetResultValue();"></asp:textbox>
<asp:textbox id="val2" runat="server"></asp:textbox>
<asp:textbox id="res" runat="server"></asp:textbox>
<asp:button id="btnSubmit" runat="server" text="Submit" onclick="btnSubmit_Click" />

Posted 26-Dec-13 13:58pm

idenizeni

Updated 26-Dec-13 14:00pm

v2

Comments

Timberbird 26-Dec-13 23:54pm

I'm not sure the original question was about web application. Since there weren't additional tags (namely ASP.NET), I decided it to be WinForms application - have I missed something?

SoMad 27-Dec-13 0:41am

Not that I can see. Besides, your answer is C# as per the tag given by the OP.

Soren Madsen

idenizeni 27-Dec-13 11:41am

Ah, good point, you are correct. I'm in web mode and obviously overlooked that bit.

loraloper_22 27-Dec-13 5:19am

@timerbird Well yes the question was about WinForms application. Thanks a lot for your help. It did the trick.

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)

Timberbird · Accepted Answer · 2013-12-26T13:52:00

Solution 1

Have you tried implementing a handler of TextChanged[^] event on val1 and val2 textboxes? If you simply need res to be cleared when user inputs something into any of two other textboxes, just write in this handler:

C#

res.Text = string.Empty;

Posted 26-Dec-13 13:52pm

Timberbird