Dynamically add a link that calls an On_Click Method

[denny1824]

I have a problem that I think should be simple.

In codebehind file in C# I have a loop that gets a string on each pass. I need to display that string on the page. I need it so that when someone clicks the text on the page that it will then call my On_Click method in the C# codebehind file. I will also need a way to determine the text that was clicked.

I have something like:

protected void Page_Load(object sender, EventArgs e)
{
    foreach (string s in stringArray)
        {
            HtmlAnchor a = new HtmlAnchor();
            a.Attributes.Add("onclick", "On_Click()");
            a.Attributes.Add("runat", "server");
            a.InnerText = s;
            ExistingTag.Controls.Add(a);
        }
}

It gives me an error on page when text is clicked.

I can't use javascript. It has to be codebehind.

Thank You for any help that you can give me.
Denny

[Plater]

Why do you make it an html anchor? Why not a button? or an aspnet controlled link?

[denny1824]

It could be any control that can display a string as text and raises some kind of event when clicked.

[Plater]

So add an instance of an aspnet control, I am pretty sure you can dynamically add the postback stuff.
Have them all "postback" to the same event, the event should be able to identify what object triggered the postback, and you can use that information to get the text that was clicked.

[Dreea]

I think you should be able to do something like that

protected void Page_Load(object sender, EventArgs e)
{
    foreach (string s in stringArray)
    {
            LinkButton something=new LinkButton();
            something.Click+=new System.EventHandler(LinkButton_Cancel_Click);

   	    // set attribute for identifying the button was pressed for
	   something.Add("someId",s);
	   something.Text=s;	
           ExistingTag.Controls.Add(something);
    }
}

	private void LinkButton_Cancel_Click(object sender, System.EventArgs e)
	{		
		// get the text you clicked on 
		string text=((LinkButton)sender).Attributes["someId"];			                      			
	}

Hope it helps

[denny1824]

I think you should be able to do something like that

protected void Page_Load(object sender, EventArgs e)
{
    foreach (string s in stringArray)
    {
            LinkButton something=new LinkButton();
            something.Click+=new System.EventHandler(LinkButton_Cancel_Click);

   	    // set attribute for identifying the button was pressed for
	   something.Add("someId",s);
	   something.Text=s;	
           ExistingTag.Controls.Add(something);
    }
}

	private void LinkButton_Cancel_Click(object sender, System.EventArgs e)
	{		
		// get the text you clicked on 
		string text=((LinkButton)sender).Attributes["someId"];			                      			
	}

Hope it helps

Dreea,

This does help. Thank you.

Do you know how to make it so that the LinkButton will still postback when javascript is disabled? C#.NET is adding the __doPostBack, but that only works when javascript is enabled.

Thanks again,
Denny

[Plater]

If javascript is disabled, NOTHING ASP.NET related will function correctly.
Unless you use all static pages.