how to get javascript value from aspx page to code behind?

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Hi to all,
In my web application to avoid tampering i want to send textbox value in java script variable to .cs page and use it. but i dont want to use hidden field.
Example:-

JavaScript

var data = document.getElementById('<%=RandomList.ClientID%>').value;

I want to use this "data" value from code behind.

Please help if possible... thanks in advance...

Posted 11-Dec-12 19:14pm

Avinash_Pathak

Updated 11-Dec-12 19:26pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

v3

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 12-Dec-12 1:35am

Why are you going for a difficult and lengthy approach ?
To avoid tampering, better to validate all data before inserting/updating to database.

But assigning the server variable's value to an JavaScript variable and then again accessing that in code behind is not the usual way.

Avinash_Pathak 12-Dec-12 2:04am

ok sir...but how to validate them...?

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 12-Dec-12 2:13am

Can you tell me what exactly you want to validate ?
Or do you want to validate all fields in your form ?
Please tell me what are the fields in your form and post some relevant codes.

And one thing, please don't call me sir, I am very young ;) :P

Avinash_Pathak 12-Dec-12 3:01am

<form name="form" action="Default.aspx" method="post">
<td> Amount: </td>
<td><input type="text" name="mmount" /></td>
</tr>
<tr>
<td class="style34"> Name</td>
<td class="style1"><input type="text" id="name" name="txtname" size="45" /> </td>
</tr>
<tr>
<td> EmailID</td>
<td><input type="text" name="txtEmailID" size="35" /> </td>
</tr>
<tr>
<td><br/>
<input type="submit" value="SUBMIT" />
<br /> </td>
</tr>

this is my code...now I dont want any of textfield value can tamper on submit click..

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ralexay · Answer 1 · 2012-12-12T05:27:00

Solution 1

JavaScript

var data = <%=my_public_variable_from_code_behind%>; // for a number

var data = "<%=my_public_variable_from_code_behind%>"; // for a string

Posted 12-Dec-12 5:27am

ralexay

Updated 12-Dec-12 5:28am

v2

Comments

Avinash_Pathak 12-Dec-12 12:23pm

i want to use this data variable value in code behind,,,