How to programmatically get the DataNavigateUrlFields property from a HyperLinkField control

Question

In my ASP.NET Web Forms I would like to get the DataNavigateUrlFields from the HyperLinkField control.

In order to get the control I use the following code in the RowDataBound event:

If e.Row.Cells(n).Controls(0).GetType().ToString() = "System.Web.UI.WebControls.HyperLink" Then
     Dim linkDownload As HyperLink = DirectCast(e.Row.Cells(n).Controls(0), HyperLink)

The problem is that I get an HyperLink already "filled" so the DataNavigateURLFormatString (myPage.aspx?downloadId = {0}) and DataNavigateUrlFields (downloadGuid) are already combined in the HyperLink.NavigateUrl property.

Is there any way to get the DataNavigateUrlFields property? In case there is not, is there any function to extract the downloadGuid value from HyperLink.NavigateUrl (in short treating the NavigateUrl as a QueryString)?

VB is preferred but also answers in C# are appreciated

score 3 · Accepted Answer · answered Mar 01 '12 at 14:05

3

If you got the url, you can use Url class to manipulate it. It also allows to extract parameters and values. There's regexp option available too.

But where's downloadGuid in DataNavigateUrlFields (downloadGuid) coming from? You should get your bound object in the RowDataBound event parameters, if downloadGuid is the property, you can grap if from there.

Anyways, full event code will certainly help.

answered Mar 01 '12 at 14:05

b0rg

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Thanks. Let's say I have the URL in NavigateUrl property. I can convert it to URL and then extract the parameters? How? Thanks!!! – CiccioMiami Mar 01 '12 at 15:21
totally lazy aren't we? :) http://stackoverflow.com/questions/659887/get-url-parameters-from-a-string-in-net – b0rg Mar 01 '12 at 15:40
thanks, no I was trying another approach by using multiple Split functions with (?), (&) and (=) as separators. The first split divides the address from the parameters. Then with the second I create an array of parameters (key=value) and with the third I divide the key from the value and I can put it in a Dictionary for instance ;-) – CiccioMiami Mar 01 '12 at 16:39

score 2 · Answer 2 · answered Mar 01 '12 at 14:22

2

Why can not you get it like

 if(e.Row.RowType==DataControlRowType.DataRow)
                Response.Write(((DataRowView)e.Row.DataItem)["downloadGuid"]);

answered Mar 01 '12 at 14:22

PraveenVenu

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with this method I also see the fields that are not visible in the gridview or not bounded? – CiccioMiami Mar 01 '12 at 15:28
You can try it yourself friend. – PraveenVenu Mar 01 '12 at 16:04
you didn't understand the question I guess – CiccioMiami Mar 01 '12 at 16:36
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I understand. What I meant is try to Response.Write the above code with a column name that is not used for binding but was there in the actual datasource and see the result yourselves. – PraveenVenu Mar 01 '12 at 16:39

How to programmatically get the DataNavigateUrlFields property from a HyperLinkField control

2 Answers2