RegisterClientScriptBlock woes

Anyone ever have problems with RegisterClientScriptBlock not working? I watch the code being executed in the debugger just as I expect it to, but my JavaScript never gets created--I don't see my alert come up, nor do I see any of the JavaScript code come up when I do a view source in the browser. Any ideas?

Thanks,
cudabean

Code:

---

                override protected void Page_Load(object sender, System.EventArgs e)
                {
                        string strJScript = "<SCRIPT LANGUAGE=javascript>\n";
                        strJScript += "document.forms.dataForm.scrollPx.value = " + Session["patListContentScrollPos"] + ";";
                        strJScript += "alert('Attempting to scroll to " + Session["patListContentScrollPos"] + ");";
                        strJScript += "ListManDataTable.scrollTop = " + Session["patListContentScrollPos"] + ";";
                        strJScript += "</SCRIPT>";
                        if (!IsClientScriptBlockRegistered("restoreScrollState"))
                        {
                                Page.RegisterClientScriptBlock("restoreScrollState", strJScript);
                        }
                        else
                        {
                                strJScript = "SOL";
                        }

---

just out of curiousity...why are you overriding the Page_Load event?

just out of curiousity...why are you overriding the Page_Load event?

Well, when I just now removed the override to see what would happen, the event stopped firing completely.

I didn't write that part of the code, (I just added to what somebody had already written) but when I remove the override, lots of things stop working. I think the deal is, Page_Load is a special name that's part of the codebehind. You are allowed to write your own Page_Load function and if you do that it won't interfere with the codebehind's separate Page_Load function, but when you use the override, the compiler knows that you are explitly trying to extend the functions of the Page_Load.

cudabean

Cudabean... two issues really...

One:
because you are using RegisterClientScriptBlock, you need to wrap those javascript calls inside a javascript function, that would be called by an event raised the browser. RegisterClientScriptBlock is used to add script that reacts within a loaded javascript document.

Two:
Therefore, if you mean to have this script run when the page itself first loads, you should use RegisterStartUpScript instead.

Three:
Execute the vb or C# code inside the PreRender method, not the Load( the MSDN example below uses the Load event, but I never had problems using PreRender)

http://msdn.microsoft.com/library/de...criptTopic.asp

Excellent, nemaroller!

I was able to get what I had working. And yes I did have to wrap the javascript in a function. I wasn't aware of the RegisterStartupScript--I'll definitely study that. The key, however, was the Page_Load event started inserting script code into my html once I set the form on the page to be runat="server".

Thanks,

cudabean