Access TextBox value in server side assigned from JavaScript using C# and VB.Net in ASP.Net

Hi seriverma,

Refer below article.

Access HTML Control values in Code Behind (Server Side) without runat server in ASP.Net

 I have created this sample using above article.

HTML

<script type="text/javascript">
    function GetText() {
        var text1Val = document.getElementById("txtValue1").value;
        document.getElementById("txtValue2").value = text1Val;
    }
</script>
<form id="form1" runat="server">
<div>
    <input id="txtValue1" type="text" />
    <input id="btnAssignValue" type="button" value="Assign Value" onclick="GetText();" />
    <input id="txtValue2" type="text" name="Value2" />
    <asp:Button ID="btnSave" Text="Save" runat="server" OnClick="OnSave" />
</div>
</form>

Code

C#

protected void OnSave(object sender, EventArgs e)
{
    string textBox2 = Request.Form["Value2"];
}

VB.Net

Protected Sub OnSave(ByVal sender As Object, ByVal e As EventArgs)
    Dim textBox2 As String = Request.Form("Value2")
End Sub