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Editorial Team
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Asked: 2026-05-21T20:55:59+00:00

In asp file I have two asp:textbox <asp:TextBox ID=textValue runat=server Width=100px/> <asp:TextBox ID=textValue2 runat=server

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In asp file I have two asp:textbox 

<asp:TextBox ID="textValue" runat="server" Width="100px"/>
<asp:TextBox ID="textValue2" runat="server" Width="100px" ReadOnly="true"/>

then I set the value via javascript getting

<asp:TextBox ID="textValue" runat="server" Width="100px" value="aaa"/>
<asp:TextBox ID="textValue2" runat="server" Width="100px" ReadOnly="true" value="bbb"/>

but when refresh the webpage finally get

<asp:TextBox ID="textValue" runat="server" Width="100px" value="aaa"/>
<asp:TextBox ID="textValue2" runat="server" Width="100px" ReadOnly="true"/>

Why the value bbb is “lost”? How can I avoid this?

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1 Answer

  1. Editorial Team

    “bbb” is being posted back, but .NET will not populate a read-only textbox from postback data. You can manually populate the text box by grabbing the form data yourself from the Page_Load() method as follows:

    textValue2.Text = Request.Form[textValue2.UniqueID];

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