Can not read webpage in csharp (Ajax)

I used PopupControl Extender to display row details from a gridview, and need to update the two textboxes, but the changed value in the textboxes did not get picked up when click the update button on the popup window, so I need to get client side javascript to read the new changed value from these text boxes. However, I tried a few way, none worked for me, not sure what is wrong.

1. Add a javascript function in the .aspx file and use onclientclick of the linkbutton control to call the function, I got error of "Microsoft JScript runtime error: Object required".

code:

<script language="javascript" type="text/javascript">
     function newTextValue(textbox) 
     {
      var text = document.getElementById("TextBox1").Value;
      alert(text);
     }
</script)

<asp:TextBox ID="TextBox1" runat="server"  Text='<%# Bind("GalleryTemplateName") %>' Height="20px" Width="230px"
                    style="text-align: left"></asp:Text

Content delivery networks (CDNs) are composed of "edge cache" servers that are strategically placed around the world at key Internet network points. These "edge cache" servers can be used to cache and deliver all types of content - including images, videos, CSS and JavaScript files.

Using a CDN can significantly improve a website's end-user performance, since it enables browsers to more quickly retrieve and download content. For example, instead of having a browser request for an image traverse all the way across the Internet to your web server to download, a CDN can instead serve the request directly from a nearby "edge cache" server that might only be a single network hop away from your customer (making it return much faster - which makes your pages load quicker).

In the previous article GridView Select Multiple Rows you learnt the multiple row selection in GridView control. Here you will get the C# code sample to select all the gridview rows using single checkbox server control. You can highlight the selected rows with different color and Font state Bold. If you want to use the selection values on different ASP.Net

To enable the GridView Paging and Sorting to update the GridView Data without refreshing the ASP.Net web page AJAX Extension controls are used. UpdatePanel is used to hold the GridView control that triggers the events for the controls placed inside it. By Default UpdatePanel triggers the asynchronous postbacks for its child controls.

To enable the GridView Paging and Sorting to update the GridView Data without refreshing the ASP.Net web page AJAX Extension controls are used. UpdatePanel is used to hold the GridView control that triggers the events for the controls placed inside it. By Default UpdatePanel triggers the asynchronous postbacks for its child controls.

Many call it the ASP.NET jQuery postback problem, but using the technique below should make it no problem anymore. $(document).ready() isn't called after an asynchronous postback. What this means? You lose the functionality that should be executed within $(document).ready() after an UpdatePanel rendered its contents after an asynchronous postback.

In the first part of this article series I introduced jQuery's functionality and how it provides a rich client side programming model. This time around I'll expand on these concepts and show you how you can use jQuery in combination with ASP.NET using it as an AJAX backend to retrieve data. I'll also discuss how you can create ASP.NET controls and otherwise interact with jQuery content from ASP.NET pages in WebForms.


jQuery is just a JavaScript library so it will work seamlessly with ASP.NET both from page code as well as through backend driven code using the Page.ClientScript object or ScriptManager. You can use jQuery on its own as a client side and Ajax library that communicates with ASP.NET or you can use jQuery in combination with ASP.NET AJAX. The two actually complement each other quite well as jQuery provides functionality that the ASP.NET AJAX library does not and vice versa. For the most part the interaction between the two libraries is trouble free except for a few very rare edge cases.

I've posted an update to this post to apply on demand loading of Details data using ASP.NET AJAX PageMethods. I'm demonstrating the usage if CollapsiblePanelExtender client events on the new post. Check it out.

I admit, Matt Berseth is really inspiring me! Few days ago I pass through 2 of his great posts:

.Surrounding your Data Table and Dialog Controls with ComponentArt Styled Panels
.Building a Grouping Grid with the ASP.NET 3.5 LinqDataSource and ListView Controls
The first one is pure design tips one which I used for making good presentation of my demo here. The 2nd post is actually the idea.

Here I am looking to explain how to call page methods using jQuery. Using jQuery to directly call ASP.NET AJAX page methods

By sending only data to the client, you can profoundly reduce the size of what you send and see a substantial increase in performance. You also allow yourself the ability to easily add features like light-weight sorting and paging on the client. This can not only improve your users' experience, but reduce server load and bandwidth requirements.

The issue is that normally $(document).ready() is called when the DOM is ready to be manipulated. But this doens't happen after an ASP.NET Ajax asynch postback occurs.

This means that the initial jQuery bindings won't be automatically available after the asynchronous postback is over. I underline "automatically" here because my last post describes more possibilities, how this issue can be worked around.

By sending only data to the client, you can profoundly reduce the size of what you send and see a substantial increase in performance. You also allow yourself the ability to easily add features like light-weight sorting and paging on the client. This can not only improve your users' experience, but reduce server load and bandwidth requirements.

To that end, I'm going to walk you through these four steps to effectively implementing a client side Repeater, using ASP.NET AJAX and jQuery:

The "TaskList" is a tried an true example of the most basic thing that you can do in any framework. Unfortunately, I had some problems finding a really good example of all the steps necessary to get a task list to work in ASP.NET MVC 1.0.

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Before explaining the article, I would like to thank all readers who read my article and voted for it. Your appreciation for my article gives me strength to write more good articles. Hope in future I will get your valuable comments and suggestions. Now I won't waste your time and come back to the topic. I have written this article on 'Ajax Enabled Gridview Using JavaScript in ASP.NET'. In this article, I will show you how to make a Gridview using a simple HTML table, JavaScript and XML HTTP for Ajax call without using any ASP.NET control.

Using Code

This article shows 2 common tasks with the ASP.NET GridView: Binding a List (generic) of objects as DataSource and on clicking a row, getting the values of the selected row by a javascript function. In the example a List with User-objects is displayed. On clicking a row containing the data of a User-object, the Id of the object is used to get the address of the user by an Ajax-call and display it in a details-field.