Insert (add) javaScript to code behind page as RegisterClientScriptBlock in ASP.NET 2.0
Some time we need to implement client-side functionality to page. To add that client-side functionality to page we need to add (insert) JavaScript (client-side script) into page.
For example if some user is ideal for certain time of period we should pop-up an alert window asking if user would like to continue.
You can insert strings of client side script into application or in some cases you can have separate file (include file). We will discuss both scenarios in our example.
The parameters of RegisterClientScriptBlock are:
1. Type: The type of calling page.
2. Key: The key to identify the script.
3. Script: Content of the script to be sent to the client side.
4. AddScript: Indicate whether the script should be enclosed within a <script> bloc.
Main.aspx -
<body>
<form id=”form1″ runat=”server”>
<div>
<asp:Button ID=”Button1″ runat=”server” OnClick=”Button1_Click” Text=”Call Client Script” />
</div>
</form>
</body>
Main.aspx.cs
public partial class Main: System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
string script = “<script> alert(‘current date and time is: “ + DateTime.Now + “‘)</script>”; this.Page.ClientScript.RegisterClientScriptBlock(typeof(Page), “MyKey”, script);
}
}
// using external client-side file
protected void Button1_Click(object sender, EventArgs e)
{
string scriptUrl = “include.js”;
this.Page.ClientScript.RegisterClientScriptInclude(typeof(Page), “MyKey”, scriptUrl);
}
}
Include.js
alert(“Hello from Javascript”);
When converting from .net 1.1 to 2.0 you get following warning:
‘System.Web.UI.Page.RegisterClientScriptBlock(string, string)’ is obsolete: ‘The recommended alternative is ClientScript.RegisterClientScriptBlock(Type type, string key, string script). http://go.microsoft.com/fwlink/?linkid=14202‘
To resolve this issue use
Page.ClientScript.RegisterClientScriptBlock(typeof(Page), “MyKey”, script);
- Harpreet Virk
April 4, 2008 at 4:26 pm |
thats what i was looking for.
Thanks for posting!!
-ronnie,winnipeg,manitoba.
September 11, 2008 at 2:00 pm |
Hey Man that was nice info… Where r u from in punjab by the way… Its Gurdeep here from Ludhiana currently living in Dublin, Ireland
July 29, 2009 at 8:50 pm |
If you need to inject Client script while working with Infragistics control – here is how: http://codecorner.galanter.net/2009/07/28/injecting-client-script-into-infragistics-async-postback/