Passing filename from a hyperlink

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David C - 25 Mar 2008 14:20 GMT

I have a DataGrid that displays file names from a directory and places them
in a HyperLinkColumn as shown below.

<asp:HyperLinkColumn DataNavigateUrlField="Name"
DataTextField="Name" HeaderText="File Name"
DataNavigateUrlFormatString="ShowDocs.aspx?doc={0}"
Target="_blank" />

My problem is that if the filename contains the character "&" then I have a
problem reading it from the QueryString in the page I am linking to. It
only reads the QueryString named "doc" up to the &. I assume I will have the
same problem if there is a ? in the filename. Does anyone know how I can
handle this better? The process works great for most file names. Thank you.

David

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bruce barker - 25 Mar 2008 16:44 GMT

all args to a query string should be url encoded. see:

HttpUtility.UrlEncode

note: they are automatically decoded when loaded into the query string
collection.

-- bruce (sqlwork.com)

> I have a DataGrid that displays file names from a directory and places them
> in a HyperLinkColumn as shown below.
[quoted text clipped - 11 lines]
>
> David

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Anthony Jones - 25 Mar 2008 17:58 GMT

> > I have a DataGrid that displays file names from a directory and places them
> > in a HyperLinkColumn as shown below.
[quoted text clipped - 13 lines]
>
> HttpUtility.UrlEncode

And the two ways to do that are:-

Add another field to the datasource that has the file name Url Encoded

OR

Add a class that inherits from HyperLinkColumn and override the
FormatDataNavigateUrlValue method:-

//C#
protect virtual string FormatDataNaviageUrlValue(Object dataUrlValue)
{

base.FormatDataNaviageUrlValue(HttpUtility.UrlEncode(dataUrlValue.ToString()
)
}

Signature

Anthony Jones - MVP ASP/ASP.NET

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Passing filename from a hyperlink

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