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Editorial Team
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Asked: 2026-06-11T19:27:49+00:00

i have this code in my default aspx file : <body> <form id=form1 runat=server>

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i have this code in my default aspx file : 

<body>
    <form id="form1" runat="server">
    <div>
        <asp:PlaceHolder ID="holder1" runat="server">
            <asp:Label ID="label1" runat="server" Text="Label">
            </asp:Label>
            <input type="text" ID="txt" runat="server"/>
            <asp:TextBox ID="txt2" runat="server"></asp:TextBox>
             <asp:Button Text="Ok" ID="btnOk" runat="server" onclick="btnOk_Click" />
        </asp:PlaceHolder>


    </div>
    </form>
</body>

and my code behind is :

        TextBox tb1 = holder1.FindControl("txt") as TextBox;
        Response.Write(tb1.Text);
        TextBox tb2 = holder1.FindControl("txt2") as TextBox;
        Response.Write(tb2.Text);

my problem is here that findcontrol (“txt”) return null value!!! because i used <input> ,how can i handle this control ?

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1 Answer

  1. Editorial Team

    Firstly, you don’t need the holder1.FindControl as you can access the controls directly.

    To get the input control, use the code;

    HtmlInputText tb1 = this.txt;
Response.Write(tb1.Value);

    You might need to import System.Web.UI.HtmlControls.

    Using System.Web.UI.HtmlControls;

    Edit

    To find controls which have been dynamically added via Javascript, you will need to use the Request object.

    string theValue = Request.Form["txt"].ToString();
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