Open modal dialog from code-behind with parameters

Question

What I need to do is to open an aspx-page in a modal dialog when the user clicks on a asp:button.

Currently I'm doing this:

(Markup)

<asp:Button runat="server" ID="TestButton" Text="Add Category" PostBackUrl="javascript:OpenPopUpPageWithTitle('_layouts/Customer/AddCat.aspx', RefreshOnDialogClose, 600, 400,'Add new Category')"/>

It's working, but what I need is to provide the ID of SPContext.Current.ListItem from the "source aspx" to the new one opened in the dialog.

To add params like {Site} to the PostBackUrl seems not to work.

Do you have any tips for me?

Answer 1

you can open the modal dialog without a postback something like:

<asp:Button runat="server ID="TestButton" onclick="javascript:...."

The second point is that you dont need to put the whole path to the application page into the url. When you open the modal dialog from an application page AddCat.aspx would be enough.

But how do I do this.

First I build a javascript method. I dont like to declare my function in the code. Maybe I need a variable to. So I declare a function.. maybe:

function OpenAddCat() {
    // do something
}

The next step. When I need the path to the sitecollection I do the following in the function:

var siteCollectionUrl = '<asp:Literal runat="server" Text="<%$SPUrl:~SiteCollection/%>" />';

The next step. I want to open the modal dialog. I would do it in this way:

var urlSite = "AddCat.aspx;
var options = { 
                 url: urlSite, 
                 title:'Druckansicht', 
                 width:640, 
                 height:400
              } 
SP.UI.ModalDialog.showModalDialog(options);

The button should look like this:

 <asp:Button ID="TestButton" Text="AddCat" runat="server" onclick="javascript: OpenAddCat();" />

I hope this could be a solution for you.

best regards