GridView is a powerful and easy in use tool in, especially if you know how to use it. There are a lot of tutorials how to add dynamic hyperlink column to GridView not programmatically, but this tutorial is about how to add hyperlink to GridView programmatically (in code-behind).

Initial data:

You have a class CEvent and collection List<CEvent>:

public class CEvent
        public int eventId { get; set; }
        public string title { get; set; }
        public string reference { get; set; }
        public string company { get; set; }


And you want to have a column in your GridView with a hyperlink of this format:

	<a href="corpevent.aspx?evid=103&company=MyComp">MyComp</a>



In a lot of tutorials it’s written how to add hyperlink column in GridView control via designer in .aspx page. They look somehow like this:

        <asp:GridView ID="GridView1" runat="server">
            <asp:BoundField DataField="eventId" />
            <asp:HyperLinkField DataNavigateUrlFields="eventId, company" DataNavigateUrlFormatString="WebForm1.aspx?eventId={0}&company={1}" />


It’s a good way. But there are a lot of cases, when you have to write GridView properties and add columns from code-behind. It wasn’t very easy for me at first.

I’ve decided to describe HyperLinkField equivalent to .aspx syntax:

    gv.Columns.Add(new HyperLinkField()
        DataNavigateUrlFields = "eventId, company",
        DataNavigateUrlFormatString = "corpevents.aspx?evid={0}&company={1}",
        HeaderText = "Open"


But I’ve got this error:

Error      2             Cannot implicitly convert type 'string' to 'string[]'

The reason is that value for "DataNavigateUrlFields" must be a string array, that’s why I had to change some code. One of correct ways to add hyperlink to GridView programmatically is below:

    string[] dataNavigateUrlStrings = { "eventId", "company" };
    gv.Columns.Add(new HyperLinkField()
        DataNavigateUrlFields = dataNavigateUrlStrings,
        DataNavigateUrlFormatString = "corpevents.aspx?evid={0}&company={1}",
        Text = "Open",
        HeaderText = "Link"