Clever Geek Handbook

Using Code Nuggets to Set Control Properties

Why can't I use code sets to set a control property? For example, a button validation group or a label text property.

<asp:Button ID="btn" runat="server" Text="test" ValidationGroup='<% =TestValidate %>'

<asp:Label ID="lbl" runat="server" Text='<% =Test %>' />

Is there a way to set control properties without using codebehind?

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You can use data binding:

<asp:Label ID="lbl" runat="server" Text='<%# "Hello World" %>' />


assuming you call DataBind in the code behind:

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        DataBind();
    }
}
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<%=SomeVar %>

uses the latest binding which behaves like Response.Write (in Page.PreRender if I recall correctly). Consequently, the server controls will not be used the way you wanted them to. Unless you are using code binding or inline code to perform the binding.



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