Eval ViewState value on a server control tag?
Is there a way to Eval the ViewState value on a server contro开发者_开发技巧l tag?
<asp:TextBox Text='<%#Eval(Viewstate["key"])%>' runat='server' />
Thanks.
Just add a watch for that ViewState value, or set a breakpoint and use the Immediate Window.
edit Changed answer to better suit your requirement to set visibility on a control.
Sticking a databind() in the code behind after setting the Viewstate value will work. e.g.
aspx.cs : -
protected void Page_Load(object sender, EventArgs e)
{
ViewState["Test"] = "hello";
DataBind();
}
aspx : -
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="txtHello" runat="server" visible='<%# ViewState["Test"].ToString() == "hello" %>' Text="Show Hello"></asp:TextBox>
</div>
</form>
</body>
will "show hello" but if you change the viewstate value to something else it won't.
You can do it like this:
<asp:Label runat="server" Text='<%# ViewState["key"] %>'/>
The <%# %> annotation means whatever is within provides access to codebehind. In this case, it will access ViewState and retrieve the item saved under "key". As a result, the @Text of the label will be whatever the value of ViewState["key"] is.
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