can i quickly run entire page's text through a function on page load?

Question

i have setup a profanity filter with bad words in a XML file and have the following function to run on my page to replace the words:

BadWordFilter.Instance.GetCleanString(TextBox1.Text);

i'm about to go through my entire site now wrapping that function around every little text variable one by one and it's going to be a huge pain in the butt

i'm hoping there's a way that i could just set my masterpage to automatically run all text through this thing on any page_load, so that the effect would be site-wide instantly. is this possible?

much appreciated for any help

Answer 1

One quick tip I have is to use the tag mapping feature of asp.net for this:

• Create a custom textbox class derived from the TextBox class
• Override the get/set Text property & in the get part, return the cleaned string
• Use tag mapping feature in the web.config file to replace all TextBox classes with your custom text box class & everything should work really well.

This link has a sample implementation which uses the HTMLEncode, but you get the idea: http://www.devwebpro.co.uk/devwebprouk-46-20071010ASPNETTagMapping.html

HTH.

Answer 2

I realize you said Page_Load(), but I suspect this will do what you need.

In the Page.PreRender event, walk through the controls:

/* inside Page_PreRender() handler...*/
if (user_options.filterBadWords == true)
{
    FilterControls(this);
}    

/* this does the real work*/
private void FilterControls(Control ctrl)
{
    foreach (Control c in ctrl.Controls)
    {
        if (c.GetType().ToString() == "System.Web.UI.WebControls.TextBox")
        {
            TextBox t = (TextBox)c;
            /* do your thing */
            t.Text = BadWordsFilter(t.Text);
        }
        if (c.HasControls())
            FilterControls(c);
    }
}

This is a hack, which will get you through your current problem: overriding the TextBox control is ultimately a better solution.