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HTML encoding of asp controls.

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I find that the HTML encoding of asp web controls are inconsistent.

Say, I want to show the string "<script> alter("test") <script>". For a
"BoundColumn" used in DataGrid, I get an *real alert box* instead
of the string. In order for it to be shown correctly, I have to call
"Server.HtmlEncode" before set the text.

But if I use "asp:TextBox" control, I can not do "Server.HtmlEncode"
before I set the text. Otherwise, I will see this on my web page: "&lt;..."

Is there a general rule, or documentation of which controls will do HTML
encoding automatically, which don't?


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