Question

I have a asp.net page like “default.aspx” containing:

<form id="form1" runat="server" >        
    <asp:Textbox id="Textbox1" runat="server" />
    <asp:Button id="Button1" runat="server" onClick="Button1_Click" text="submit" />
</form>

What I want is keeping text value in textbox field while user returned from other subpages.
So in .cs file I try this:

protected void Button1_Click(object sender, EventArgs e){
    Session["Data"] = Textbox1.Text;
}

public string Data{get{return Session["Data"].ToString();}}      

and in.aspx:

<asp:Textbox id="Textbox1" runat="server" text="<%# Data %>" />

but it do not work, the textbox field gets blank.
How to implement this without javascript?

Answer 1

The # works only in databinding expressions. So you need (e.g. in Page_Init)

Page.DataBind();

for this to work

<asp:Textbox id="Textbox1" runat="server" text="<%# this.Data %>" />

otherwise this might also work

<asp:Textbox id="Textbox1" runat="server" text="<%= this.Data %>" />

inline asp.net tags… sorting them all out (<%$, <%=, <%, <%#, etc.)

As already commented, in general it’s better to use the codebehind since you have compile time checking then.