checkbox Server Control OnCheckedChanged

Bassem

15y4.9k.NET

hello , i have this code and it run perfectly with input checkbox html contol

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" Title="Untitled Page" %>

when i change the to CheckBox
what i will write instead of "chvisible('<%=TextBox1.ClientID %>');"
in onCheckedChanged Event ?????

checkbox serverside control doesnt hava onclick event

when i try to write this following , it dont run

14 Replies

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Raja Krishnamurthy15y ago
Accepted answer
Hi Bassem,

Please try this:

On pageload

Checkbox1.Attributes.Add("onclick","chvisible('"+TextBox1.ClientID+"');");

The error you are getting is because the ClientID might not have rendered. And you can remove the onCheckedChanged which you have given in the Checkbox tag. Also don't forget to check for postback.

HTH

Happy Programming!!!

Regards,
Raja
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Bassem15y ago
RAJA Doneeeeeeeeeeeeeeeeeee (^_^) (^_^) (^_^)
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Bassem15y ago
i want that when user mark on check box a text box appear,and he will add text .... it done if he unmark the checkbox and mark it again i want the textbox displayed with no text like this Textbox1.text=""; about multicheckboxes and textboxes i asked about the performance ... Is it preferred to write in page load this following:- CheckBox1.InputAttributes.Add("onclick", "chvisible('" + TextBox1.ClientID + "')"); CheckBox2.InputAttributes.Add("onclick", "chvisible('" + TextBox2.ClientID + "')"); CheckBox3.InputAttributes.Add("onclick", "chvisible('" + TextBox3.ClientID + "')"); CheckBox4.InputAttributes.Add("onclick", "chvisible('" + TextBox4.ClientID + "')"); CheckBox5.InputAttributes.Add("onclick", "chvisible('" + TextBox5.ClientID + "')"); CheckBox6.InputAttributes.Add("onclick", "chvisible('" + TextBox6.ClientID + "')");
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Raja Krishnamurthy15y ago
As Manikavelu (buddy already gave a +1 for your post :-)....you did the major part) pointed out don't forget the braces {} and it is control.value="" and not control.Value="".

HTH.

Happy Programming!!!

Regards,
Raja
0
Raja Krishnamurthy15y ago
It would work no matter how many textboxes or checkboxes are there in the page as long as you follow the same logic.

What do you mean by How do I make textbox as null?

Do you want to remove from the DOM? I think your code of making it visible / invisible and setting the text as "" is fine.

HTH.

Happy Programming!!!

Regards,
Raja
0
Bassem15y ago
thanx raja

i do as u said

  function chvisible(controlId)
   {
   var control = document.getElementById(controlId);
   if(control.style.display == "none" || control.style.display == "")
   control.style.display = "block";
   control.Value="";
   else
   control.style.display = "none";
   }

but unfortunately not work .
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Bassem15y ago
Thankx Raja

it works correctly :D :D Thank you .

what if i have 20 textbox and checkbox Am i use the same way to do that ??

what about this question :) ?

how i make textbox null when user check on it (javascript code)

thank you man :)
0
Raja Krishnamurthy15y ago
Hi Bassem,

I think you mean to make the text in the textbox as "" and not making the textbox as null.

Add this to your JS

control.value="";

HTH.

Happy Programming!!!

Regards,
Raja
0
Bassem15y ago
Manikavelu

try it with yourself it will not work

thank your for helping me :)

when i use

Checkbox1.Attributes.Add("onclick","chvisible('"+TextBox1.ClientID+"');");

it work perfectly

about text displayed in text box
and about this crazy line which make you angry control.body.text=""; :D :D (^_^)

how i make textbox null when user check on it (javascript code)

thanx Manikavelu , u are good helper
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Manikavelu Velayutham15y ago
Working Code

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Bassem15y ago
<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" Title="Untitled Page" %>





error in the line of checkbox :
Error1Too many characters in character literal
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Manikavelu Velayutham15y ago
1. comment the line control.body.text="";

2. if(control.style.display == "none" || control.style.display == "")
{
control.style.display = "block";
control.body.text="";
}

Include the content of true condition with braces.

3. OnCheckedChanged="chvisible('TextBox1.ClientID');"

Put it like above .

If the above changes done, your code will work fine
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Bassem15y ago
thank you Manikavelu Velayutham for you Replay

but it also not success when i write

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Manikavelu Velayutham15y ago
OnCheckedChanged -> its a Server Side Event and not a client side event.

You can use the same OnClick event like in Html control for client side event.
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