HyperLink HTML PostBack

[danasegarane]

Hi All,
I came across a table creation code which uses html tags.

"<a class='gridlink' targe='_self' href = 'NamedZone.aspx?flag=I&lat=" & _
                        '           zoneLat & "&long=" & "</a>

Now this navigates to another page. But I need to add one variable from JavaScript to a hidden value.For this I need the request to hit the server and navigate to that page.

I was just to trying to create one Hyperlink control using HTML. But not succeeded. Has any one any idea ?

Thanks in Advance

[danasegarane]

I did something like this. But it is not hitting server

url = Page.ClientScript.GetPostBackClientHyperlink(hlink, values)
                            collObject(loopCount, 1) = String.Format(Control, url, zoneAddress)

[gep13]

Hey Dana,

Do you know what the value is at the time that page is first rendered?

Can you not add this at the time the page is first rendered, rather than first posting back to the server?

Gary

[danasegarane]

I am setting the value using javascript. And I need to get this set text in the next page. As the text is done using Javascript. I am not getting in the other page

[gep13]

Hey,

Doh, I see what you are getting at.

Yeah, so you need to put the JavaScript value into a HiddenField and then read this value on the server.

Have a look at the following:

http://www.bestechvideos.com/2009/04...de-information

It should cover what you are trying to do.

Gary

[danasegarane]

Let me see the vid. Mean time, I have a question. Can we create a hyperlink control in code behind and can get the HTML view of the control ?

[dnanetwork]

yes we can create hyperlink from the code behind but...

an get the HTML view of the control...i didn't get this line..

[gep13]

Hey Dana,

I am not sure that I follow exactly what your requirement here is:

Can we create a hyperlink control in code behind and can get the HTML view of the control ?

What exactly do you mean?

Gary

[danasegarane]

Take this example.
I am creating an HyperLink Control in code behind as

Dim hlink As New HyperLink
            hlink.NavigateUrl = "~Default.aspx"

If the page is rendered in page the view source the page will be something like

"<a class='gridlink' href='javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("""", """", 
false, """", ""{0}"", false, true))'>{1}</a>"

Can I get this source without rendering the page ?

[gep13]

Hey,

I thought that might be what you are getting at, but I wasn't sure.

There are methods such as RenderContents and RenderControl that write the control into an HtmlTextWriter. In theory, I guess you could create a HtmlTextWriter, and then call ToString on that, but what I would like to know is why you would need to do this.

Gary

[rjv_rnjn]

@danasegarane: I'm just trying to step back and answer your first post. If I get you right all you are trying to do is inject a postback option into the link.

In that case I would modify the <a> tag like below:

hrefValue = "javascript:__doPostBack('" + Page.ClientID + "', 'myPostBack:../app/SubFolder/NewPage_" + myId.ToString()
                                        + ".aspx?myTypeID=" + myId + "&myNumber=" + currentDataRow["no"] + "');";
hyperlinkHTML = @"<a href=""" + hrefValue + @""" target=""_self"">" + columnText + "</a>";

And insert this HTML in a placeholder on the page (I did this for gridview).
Then in the Page load event I have

if(!IsPostBack){
//...do what you want
}
else
 {
       string eventArg = Request.Params.Get("__EVENTARGUMENT");
       if (eventArg.StartsWith("myPostBack:"))
       {
           //Do the Response.Redirect with hidden field.
        }
}

After composing this post it seems I may have got your post wrong (ignore this in that case).

[danasegarane]

Thanks for the reply. The thing is that the I need the CrossPage PostBack. Not the PostBack.

[gep13]

Hey,

Ok, I am getting lost again

I thought I had a handle on this thread, but I think it is gone.

Dana, can you describe exactly what you are trying to achieve, perhaps with an example?

Gary

[danasegarane]

The thing is that I am fixing one application which uses user control and links it. For the Links inside the table they used the <a> tag instead of normal hyper link control.

And my situation is that I have retain some selected values in the current page as the current page navigate to another and comes back here.

Now the page should retain the values of some html(Not. Not server control) text box
values.

For that what I need is to set the value in JavaScript some where in hidden field and using the previous Page method get the hidden values and stored in session and while coming back check the session and populate the check boxes

Hope I am clear now

[brin351]

maybe you could use javascript to set a cookie with the values you need to retain across pages.

[danasegarane]

Let me check with my team