I need to add two relative Jquery files path in my master pages Head section.
i try this for two file but just one of them calling in my "Head" section.i also use this cods in my master page Code Behind but it didn't work:
protected void Page_PreRender(object sender, EventArgs e)
{
string jquery = ResolveClientUrl("~/JQuery/jquery-1.4.4.min.js");
Page.ClientScript.RegisterClientScriptInclude("jquery", jquery);
string jqueryShadow = ResolveClientUrl("~/JQuery/jquery.shadow.js");
Page.ClientScript.RegisterClientScriptInclude("jqueryShadow", jqueryShadow);
}
Also ,when i try this:
<script type="text/javascript" src="<%= Page.ResolveClientUrl("~/jquery.js") %>"></script>
i got same error with 1 link!
When i define both of Jquery files in my master page Head section directly, every things works for me!how can i inject my Jquery files(more than one!) with relative paths exactly on the Head section in Master Page?
Any idea?
Regards.
Have you tried the solution proposed (by #Bharath) on the link you provided?
var control = new HtmlGenericControl("script") ;
control.Attributes.Add("type", "text/javascript");
control.Attributes.Add("src", Page.ResolveClientUrl("~/JQuery/jquery-1.4.4.min.js"));
this.Page.Header.Controls.Add(control);
You could put those statements on the Page_Load event of your MasterPage.
Regards,
Related
I have a master page and 30 child pages. In my master page, I am loading prototype js which is needed on my 29 child pages.
On 30th child page, I am having pivottable.js which loads C3 and D3 charts. PivotTable.js, C3.js, D3.js are having some conflicts with prototype.js and they are not working since the master page is having prototype js reference.
If I removed prototype.js reference from master page, pivot table works as expected but other 29 other pages which require prototype js are not working. :-(
Is there any way to remove prototype reference from master page on 30th child page alone before the scripts on 30th page loads?
Hoping a reply. Thanks in advance.
Put your JavaScript files inside ContentPlaceHolder like below in your master page.
//SCRIPTS THAT CAN LOAD ON ALL PAGES
<script type="text/javascript" src="..."></script>
<asp:ContentPlaceHolder runat="server" ID="critical_js_files">
//SCRIPTS THAT YOU DO NOT LOAD ON SOME CHILD PAGES
<script type="text/javascript" src="..."></script>
</asp:ContentPlaceHolder>
In the master page code behind, add this method:
public void DisableCriticalJavaScriptFiles()
{
critical_js_files.Visible = false;
}
And finally, add below code in your Page_Load method in your 30th child page or any page where you do not want load those js file:
protected void Page_Load(object sender, EventArgs e)
{
Master.DisableCriticalJavaScriptFiles();
//REST OF THE PAGE_LOAD CODE
}
Hope this helps.
Hi I have a usercontrol which includes some JavaScript, if I add the control to a standard web page I can start the JavaScript in the body tag, like this
<body onLoad="Start()">
The problem is that I need to add the control to a webpage which is inside a masterpage, how do I then start the script when a page inside a masterpage doesn't have a body tag.
You can register it using:
Page.ClientScript.RegisterStartupScript()
For your case, it would be this:
Page.ClientScript.RegisterStartupScript(GetType(), "MyScript", "Start()", true);
Include jQuery and put your initialization code inside $(document).ready().
If you want to strictly use .NET functionality, and your page is properly marked up with runat="server", you could use Page.ClientScript.RegisterStartupScript() as well.
You can change the body tag to runat server and give it an id.
<body id="masterBody" runat="server">
Then on page load:
public void Page_Load(Object sender, EventArgs e)
{
HtmlGenericControl body = (HtmlGenericControl)Master.FindControl("masterBody");
body.Attributes.Add("onload", "Start()");
}
Try binding to the DOM document.ready event to load your content after the document has completed rendering
I am struggling with something that I guess should be standard practice really. I have a number of user controls that use some JQuery plugins. I do not really want to link to the extra CSS and JS files from my main masterpage as this would cause extra load to the user the first time they hit the site, (admittedly it would only be the once), so I was just putting them links into the top of the user control. Then I looked at my source HTML, not nice! Even worse for controls that repeat multiple times on a page.
So I was thinking is there a way of injecting them into the Head of the page when they are needed from the User Control. For that matter is there a way of doing it to the footer for JS stuff?
To dynamically register a script (and ensure that duplicates are merged) in ASP.NET you can call:
Page.ClientScript.RegisterClientScriptInclude(
"mykey", "~/scripts/jquery-1.3.2.js");
And read the full details on this method on MSDN.
To add CSS dynamically you can do something like this:
HtmlLink cssLink = new HtmlLink();
cssLink.Href = "path to CSS";
cssLink.Attributes["some attr1"] = "some value1";
cssLink.Attributes["some attr2"] = "some value2";
Page.Header.Controls.Add(cssLink);
This example of injecting CSS will not merge duplicate entries. To avoid duplication you'll have to keep track of duplicates yourself. One place you can store a list of scripts you've already registered is in HttpContext.Items. Stick a HashSet in there that keeps a list of all registered scripts so that you don't register the same CSS file twice (which is generally harmless, but something to avoid anyway).
I followed a similar approach, but I use CSS directly in the user control so I don't have to import a CSS file. The following is code entirely from a sample user control:
<style id="style1" type="text/css" visible="false" runat="server">
td { font-family: Tahoma; font-size: 8pt; }
</style>
In code-behind:
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
HtmlGenericControl style = new HtmlGenericControl("style");
style.Attributes.Add("type", "text/css");
style.InnerHtml = style1.InnerHtml;
Page.Header.Controls.Add(style);
}
You'll notice that the CSS is rendered in the head tag and not inside the body tag.
You can use ClientScript.RegisterClientScriptInclude() for the JavaScript.
For the CSS, one trick is to include them in your Master page, but with Visible="false", so that they aren't rendered into the markup by default.
Then, in your user controls, set a flag in the Items collection, from an early event, such as OnLoad(). For example, this.Context.Items["mycss"] = true;
Finally, in your Master page, from a later event, such as OnPreRender(), check to see if those flags are set. If they are, then set the Visible property to true for the corresponding CSS.
This also allows you to use the control with Master pages that don't use the CSS, since the Items entries could simply be ignored. If you have many Master pages that need the same behavior, you could put this code in a base class or use nested Master pages.
I assume you're using Asp.NET.
Try putting a content placeholder in the of the MasterPage...
<head>
<asp:ContentPlaceHolder ID="AdditionalPageHeader" />
</head>
If you're working in an aspx file or an ascx you need only define a content control...
<asp:Content ContentPlaceHolderID="AdditionalPageHeader" />
If you're working on a code-behind only type of server control, you can can get a pointer to that content place holder:
this.Page.Master.FindControl("AdditionalPageHeader")
... and manipulate it's contents programatically.
To add stylesheets or javascript (inline or not) dynamical I wrote these three functions:
Public Function addScript(ByVal path2js As String) As System.Web.UI.Control
Dim si As New HtmlGenericControl
si.TagName = "script"
si.Attributes.Add("type", "text/javascript")
si.Attributes.Add("src", path2js)
Return si
End Function
Public Function addScript_inline(ByVal js As String) As System.Web.UI.Control
Dim si As New HtmlGenericControl
si.TagName = "script"
si.Attributes.Add("type", "text/javascript")
si.InnerHtml = js
Return si
End Function
Public Function addStyle(ByVal path2css As String) As System.Web.UI.Control
Dim css As New HtmlLink
css.Href = path2css
css.Attributes.Add("rel", "stylesheet")
css.Attributes.Add("type", "text/css")
css.Attributes.Add("media", "all")
Return css
End Function
I call them in page_load on my masterpage, like this:
Me.Page.Header.Controls.Add(modGlobal.addScript("script/json/json2.js"))
or
Me.Page.Header.Controls.Add(modGlobal.addStyle("style/flexigrid/flexigrid.css"))
Regards
As title, basically I have a user control placed inside a page and then the page is placed inside the master page. I want to extract a block of javascript and put it back to the page head. When I try to wrap the code inside any block control (e.g. a div runat server) and access divID.InnerText then ASP.NET bust off with
Cannot get inner content of startup_script because the contents are not literal.
I dont want to extract JS inside cs file, thats awfully ugly approach (all sort of escapes and people wont even notice you have JS written unless they drill your CS file), what can I do?
You could store the javascript in a separate file, and then add it to the page using Page.RegisterClientScriptBlock()
Add the javascript you want to a .js file and add the .js file to your project.
Alter the properties of the .js file so that it is an Embedded Resource.
Then use code like this somewhere in your UserControl (maybe the Page_Load) to pull the code from the file and drop it into the page:
string javaScript = "";
// the javascript is in a separate file which is an 'embedded resource' of the dll
using (StreamReader reader =
new StreamReader((typeof(ThisClass).Assembly.GetManifestResourceStream(typeof(ThisClass), "NameOfJavaScriptFile.js"))))
{
javaScript = String.Format("<script language='javascript' type='text/javascript' >\r\n{0}\r\n</script>", reader.ReadToEnd());
}
Page.RegisterClientScriptBlock("MyScriptBlock", javaScript);
Note that RegisterClientScriptBlock() will put the script near the top of the page, but apparently not in the page header.
(edited bit about header after comment)
<%# Page Language="C#"%>
<script runat=server>
protected override void OnLoad(EventArgs e)
{
string scriptText = someID.InnerHtml;
//if you really want it in the header...
//Page.Header.Controls.Add( new LiteralControl(String.Format( "<scr" + "ipt language=\"javascript\">{0}</scri" + "pt>\\n", scriptText )));
//doesnt add to header and requires form runat=server
Page.ClientScript.RegisterStartupScript(this.GetType(), "SomeScript", scriptText, true);
base.OnLoad(e);
}
</script>
<head runat=server></head>
<form runat=server>
<div id="someID" runat=server>alert('hi');</div>
</form>
Okay, I've probably done this in a horrible, horrible way, but I wanted to add a script to the head element in a recent project from a user control. This script didn't require any data from my server, but I only wanted it on specific pages, so I put the script in a .js-file, and added it to the head like this:
HtmlGenericControl script = new HtmlGenericControl("script"); // Creates a new script-element
script.Attributes.Add("type","text/javascript");
script.Attributes.Add("src","src/to/js-file.js");
Page.Master.FindControl("head").Controls.Add(script); // Finds the element with ID "head" on the pages master page.
Not entirely sure if the code works as I think it does as the code I wrote for the project is on another machine, but you get the idea, right?
Edit:
After googling your error message for a bit, I think this might be a solution to your problem:
using System.IO;
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
yourDivID.RenderControl(h);
String str = sw.GetStringBuilder().ToString();
If you combine the two examples, you should be able to get the result you want. I haven't tested this, but it works in my head.
How do you add Javascript file programmatically to the user control?
I want the user control to be a complete package - ie I don't want to have to add javascript that's related to the user control on the page where it's used, when I can do it inside the control itself.
Since there is no Page object in the user control, how would you do it?
In the Page_Load method of control.ascx.cs file:
LiteralControl jsResource = new LiteralControl();
jsResource.Text = "<script type=\"text/javascript\" src=\"js/mini-template-control.js\"></script>";
Page.Header.Controls.Add(jsResource);
HtmlLink stylesLink = new HtmlLink();
stylesLink.Attributes["rel"] = "stylesheet";
stylesLink.Attributes["type"] = "text/css";
stylesLink.Href = "css/mini-template-control.css";
Page.Header.Controls.Add(stylesLink);
This will load css and Javascript into the head tag of the main page, just make sure that the head has runat="server".
You can register client script includes using the ClientScriptManager.
Page is accessible through the Control.Page property.
Page.ClientScript.RegisterClientScriptInclude (
typeof ( MyControl ), "includeme.js", "js/includeme.js" );
EDIT: Sorry, for a total "complete package", its possible using scripts as Embedded Resources,
and aquire dynamic URL's through the WebResource.axd handler.
If this is not considered totally complete, then i guess it could be put in App_LocalResources, but it never gonna be just one file,
unless the code and script is inline.
The same as gnomixa's response, only a bit cleaner:
HtmlGenericControl js = new HtmlGenericControl("script");
js.Attributes["type"] = "text/javascript";
js.Attributes["src"] = "jscript/formfunctions.js";
Page.Header.Controls.Add(js);
from http://www.aspdotnetfaq.com/Faq/How-to-Programmatically-add-JavaScript-File-to-Asp-Net-page.aspx
In my site I Place all needed scripts and styles to placeHolder
<asp:placeHolder runat="Server" ID="phHead">
<script src="/header/widget/script.js" type="text/javascript"></script>
<link href="/header/widget/style.css" rel="stylesheet" type="text/css" />
</asp:placeHolder>
and
Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Page.Header.Controls.Add(phHead)
End Sub
Good question!
A UserControl should be a single package without any dependency on a JavaScript or a CSS file. You will need to make the JS and CSS files as embedded resources. Right click properties and set build action to embedded resources. Then you need to inject the JavaScript and CSS files as WebResources.
Here is one article that I wrote yesterday which talks about the same scenario:
http://highoncoding.com/Articles/502_Creating_RadioButton_Validation_Using_Custom_Validator.aspx
I generally do it when rendering the HTML for the control and depending on whether it's a library injection or an instance injection I use the Items collection to specify whether or not I have already produced the code for a control of this type during the current request using a unique identifier.
Something to the effect of:
protected override void Render(HtmlTextWriter writer)
{
base.Render(writer);
//Check if the Object Script has already been rendered during this request.
if (!Context.Items.Contains("xxx"))
{
//Specify that the Object Script has been rendered during this request.
Context.Items.Add("xxx", string.Empty);
//Write the script to the page via the control
writer.Write([libraryinjection]);
}
//Write the script that instantiates a new instance for this control
writer.Write([instanceinjection]);
}
If you have the text of the actual javascript in your .CS file, you can call Page.ClientScript.RegisterClientScriptBlock.
The following assumes that "GetScript()" returns the actual javascript you want added to the rendered control.
Page.ClientScript.RegisterClientScriptBlock(GetType(), "controlScriptName", GetScript());
I found this to be a more elegant way to fix-link to your javascript.
In your .ascx, link to your script files the following way:
<script src='<%= ResolveClientUrl("~/Scripts/jquery-1.7.1.min.js") %>' type="text/javascript"></script>
<script src='<%= ResolveClientUrl("~/Scripts/jquery.maskedinput-1.3.min.js") %>' type="text/javascript"></script>
That way, no matter which subfolder/page you add your user control to, the link to your scripts will always be correctly resolved.