Question

Pass a value from master page to content page

Asked by: skiabox

I have a master page with a treeview and I want to pass the onlick node value to a select statement that exists in the content page(in an sqldatasource control).
How can I do that?

(I want to pass that e.Node.Value from the master page to the content page)

protected void RadTreeView1_NodeClick(object sender, Telerik.Web.UI.RadTreeNodeEventArgs e)
    {
        Label1.Text = e.Node.Text;
        Label2.Text = e.Node.Value;
    }

                                  
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Asked On
2009-06-24 at 04:23:35ID24517657
Topic

Programming for ASP.NET

Participating Experts
1
Points
500
Comments
6

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Answers

 

by: abelPosted on 2009-06-24 at 04:54:09ID: 24700133

To do that, you need to expose a property in your master page, set the MasterType to your masterpage to make the Page understand what type to expect. Then you can use the property. So, all three steps something like this:

<!-- master code-behind -->
public string NodeFieldText
{
    get
    {
        return Label1.Text; // can be empty
    }
}
 
<!-- page, top of it, this binds   -->
<!-- the type to the Master object -->
<%@ MasterType VirtualPath="~/MyMaster.Master" %>
 
<!-- page, code behind, page_load or anything -->
<!-- use the magic Master object in the page  -->
string masterNodeFieldText = Master.NodeFieldText;

                                              
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by: skiaboxPosted on 2009-06-24 at 05:03:30ID: 24700187

Can I use another control in the Master Page (not Label) so that the variable is not written on the page?
(I know that I can set visible to false but is there another way to store this variable?
Thank you very much!

 

by: abelPosted on 2009-06-24 at 05:07:39ID: 24700210

You can use Session, which is the de facto way, and you can use a hidden form element, which is the other de facto way. It depends a bit what you're after, but indeed, a label is visible and is not the correct place for this info.

When the value is set during one postback, you can also simply make the property read/write and just set the property from your master event. However, if you need to keep it across postbacks and refreshes etc, you should store it in either the session or a hidden form element.

// read/write property for C# 3+
public string NodeFieldText { get; set; }

                                              
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by: abelPosted on 2009-09-01 at 03:53:34ID: 25230190

The user asked how to pass values from master to content, which was answered, and later followed up with an additional question (how to hide it from the user), which was also answered. I believe this question has received correct and good coverage. Please accept http:#24700133 as answer and http:#24700210 as assist.

20120131-EE-VQP-002

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