Passing variables to javascript in imagebutton onclientclick in c#

Question

I want to pass my dynamic value received in querystring to a javascript function from an imagebutton onclientclick event :

    Request.QueryString["id"].ToString()

    <asp:ImageButton ID="btn" runat="server" 
        OnClick="btn_Click"
        ImageUrl="/images/events.gif" 
        OnClientClick="return confirm('Are you sure delete the id number XXXXXX ?');" />

I need that on XXXXX is the value passed in querystring.

I have tried without success of the examples found on google.

Can you help me ?

Thank you in advance for any help.

You could always do it via code-behind if you wanted to validate the query string. Obviously you don't want to display that message if the id is an empty string. Granted, you might already have validation on Page_Load. — JohnPete22
– JohnPete22, Commented Dec 6, 2019 at 19:12

dvo · Accepted Answer · 2019-12-06 19:10:54Z

1

Try using <% %> to grab the ID from the query string:

<asp:ImageButton ID="btn" runat="server" 
    OnClick="btn_Click"
    ImageUrl="/images/events.gif" 
    OnClientClick="return confirm('Are you sure delete the id number <%# Request.QueryString["id"].ToString() %> ?');" />

answered Dec 6, 2019 at 19:10

dvo

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2 Comments

user3368883 Over a year ago

Thank you I have error Parser Error The server tag is not well formed

dvo Over a year ago

Try swapping the double quotes for OnClientClick with single quotes. Like: OnClientClick='return confirm...;'

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