aspx page using gridTemplateColumn String.Format and need a replace or mask value if exists

Question

<radG:GridTemplateColumn UniqueName="MyText" DataField="MyText" HeaderText="My Text(Server.HtmlEncode)" SortExpression="MyText">
    <ItemTemplate>
        <%#String.Format("{0}&#160;", Server.HtmlEncode(Eval("MyText").ToString()))%>
    </ItemTemplate>
</radG:GridTemplateColumn>

Here the variable MyText is

<?xml......<password>anyvaluehere</password>"

Basically I have a LINQ to SQL table where a raw XML value has been stored as varchar(max) and then getting published on a web page. I want to delete the value of in the middle of the tag password or replace the value with *****

From my above code I have

<%#String.Format("{0}&#160;", Server.HtmlEncode(Eval("MyText").ToString()))%>

But my result should ideally be "<?xml......<password></password>" or "<?xml......<password>***********</password>"

How to use asp.net / C# to get the "MyText" password cleaned?

Answer 1

You could do this with a little helper function

GridView Markup.

<radG:GridTemplateColumn UniqueName="MyText" DataField="MyText" HeaderText="My Text(Server.HtmlEncode)" SortExpression="MyText">
    <ItemTemplate>
        <%# ObscurePassword(Eval("MyText"))%>
    </ItemTemplate>
</radG:GridTemplateColumn>

On code-behind.

//Warning: minimal code, no error catching mechanisms included.
protected string ObscurePassword(object xmlObj)
{
    //var xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?><main><blah>some value</blah><password>anyvaluehere</password></main>";
    var xml = xmlObj.ToString();
    XDocument doc = XDocument.Parse(xml);
    XElement elm = doc.Descendants("password").First();
    elm.Value = "*****";
    //elm.ReplaceWith(new XElement("password", "*****"));
    var encodedDoc = System.Web.HttpUtility.HtmlEncode(doc.ToString());
    //var encodedDoc = System.Security.SecurityElement.Escape(doc.ToString());
    return encodedDoc;
}

Update : If you are using a namespace, ie, xmlns, add that too while querying like this

XNamespace xmlns = "http://yoyo.net/";
XElement elm = doc.Descendants(xmlns + "password").First();

Or

string xmlns = "http://yoyo.net/";
XElement elm = doc.Descendants(XName.Get("Stuff", xmlns)).First();

Hope this helps.