Copied value from one textbox to another textbox not saving in button click using JavaScript in ASP.Net

@Andrea

Thanks for reply, it is not working for my requirement..

Refer:

1. Copy Text from one TextBox to another using JavaScript
2. Copy Text from one TextBox to another while it is typed using JavaScript

copy text from one textbox to another textbox working fine my problem is my second textbox property enabled = true then i press the save button second textbox value saved but if set enabled=false. then i am not getting any value but my secondtextbox is not empty...

Hi,

it is possible for you to make the text field readonly (ReadOnly=True) as opposed to making it Disabled=True? The reason being that if textfield is disabled is not submitted with the form in the POST request.

1st Solution

Use ReadOnly instead of Enable property

2nd Solution

or you need to use HiddenFiled and set textbox value in it,and get its value on save click

<div>
    <script type="text/javascript">
        function OnTextKeyUp(txt) {
            document.getElementById("txtConfirEmail").value = txt.value;
            document.getElementById("hfConfirEmail").value = txt.value;
        }
    </script>
    <table cellpadding="5" cellspacing="5">
        <tr>
            <td>
                Email:
            </td>
            <td>
                <asp:TextBox ID="txtEmail" runat="server" onkeyup="OnTextKeyUp(this);" />
            </td>
        </tr>
        <tr>
            <td>
                Confirm Email:
            </td>
            <td>
                <asp:TextBox ID="txtConfirEmail" runat="server" ReadOnly="true" />
                <asp:HiddenField ID="hfConfirEmail" runat="server" />
            </td>
        </tr>
    </table>
    <asp:Button Text="Save" runat="server" OnClick="Save" />
</div>

C#

protected void Save(object sender, EventArgs e)
{
    string confirEmail = hfConfirEmail.Value;
}

I hope this will help you out.