assigning a value to a JavaScript variable using server-side code

Seeking guidance on setting a JavaScript value from backend code. Here is the current JS code snippet:

 gts.push(['google_base_offer_id', 'ITEM_PRODUCT_SEARCH_ID']);

My attempt involves using this line of code:

gts.push(['google_base_offer_id', document.getElementById("hidden").value]);

The markup contains a hidden value:

<asp:HiddenField ID="hidden" runat="server" />

In the backend OnPreRender event, I am assigning the value like so:

hidden.Value = product.ProductId.ToString();

While the value is properly set, viewing the source in the browser does not show the populated value. Is there an error in my approach? Can the value be populated in that manner? Appreciate any help, Laziale

c#javascriptasp.netjavascript-framework

Answer №1

Here's a simple way to achieve this:

gts.push(['google_base_offer_id', document.getElementById('<%= hidden.ClientID %>').value]);

Answer №2

Another approach you might consider is:

If you have a ScriptManager on your webpage, you can store the JavaScript value in a hidden field within the code behind file.

ScriptManager.RegisterHiddenField(this, "hiddenKey", "hiddenValue");

Then, within the aspx page, you can utilize:

gts.push(['google_base_offer_id', document.getElementById("hiddenKey").value]);

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