DevLog

Hello, a common question on the ASP.NET Forum is:

How to define an Event Handler for a HyperLink?

The solution as follows:

protected System.Web.UI.WebControls.HyperLink HyperLink1;
    
private void Page_Load(object sender, System.EventArgs e)
{
    HyperLink1.Attributes.Add("onClick",
                                      Page.GetPostBackEventReference(this.HyperLink1,"HyperLinkPostBack$"+this.HyperLink1.ID));
        if ( (IsPostBack)
             && (Request.Form["__EVENTTARGET"] != null)
             && (Request.Form["__EVENTARGUMENT"].ToString().StartsWith("HyperLinkPostBack")) 
            )
         {
             string[] args = Request.Form["__EVENTARGUMENT"].ToString().Split('$');
             if ( (string.Compare(args[0], "HyperLinkPostBack", false, System.Globalization.CultureInfo.InvariantCulture) == 0) 
                                                        && (args.Length > 1) )
             {
                 HyperLinkHandler(args[1].ToString());
             }
         }
}
public void HyperLinkHandler(string ID)
{
    Response.Write("You clicked HyperLink with ID : "+ ID);
}

 Or You could use this way, using IPostBackEventHandler:

private void Page_Load(object sender, System.EventArgs e)
{
    HyperLink1.Attributes.Add("onClick", Page.GetPostBackEventReference(this, "HyperLinkPostBack" + "$" + this.HyperLink1.ID));
}

public void RaisePostBackEvent(string eventArgument)
{
    if (!string.IsNullOrEmpty(eventArgument))
        {
            string[] args = eventArgument.Split('$');
                if ((string.Compare(args[0], "HyperLinkPostBack", false, System.Globalization.CultureInfo.InvariantCulture) == 0) 
                                                          && (args.Length > 1))
                {
                       HyperLinkHandler(args[1].ToString());
                }
        }
}
public void HyperLinkHandler(string ID)
{
    Response.Write("You clicked HyperLink with ID : " + ID);
}

Hope that helps,

Regards

Tags: ASP.NET 1.x, ASP.NET 2.0 - General