How To Add Paging With a Filter Using Sencha Architect with ExtJS4

 

Sometimes,the simplest things can seem complicated.  Well, in this case, after struggling for a while, it turns out the simplest things can actually be pretty simple.  The application I’m building right now (with Sencha’s ExtJS and ASP.NET) is a simple log viewer.  My server base app uses NLog which does a great job of logging the errors, but the errors are all on my server and I need to see them.  So, hence I need a simple log viewer.  Here is what it looks like once it’s all done.

 

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Notice that we have a toolbar that we can check a box in as well as a field to type some text into.  I’m going to assume that creating the windows, the grid, dropping the toolbars on the page (both paging and top toolbar) are something that you know how to do.  The only thing I’m really going to mention is how you go from a grid panel that pages correctly to one that pages correctly with some parameters being sent to the server.

So, it turns out all you have to do is assign an id to each of the controls on your top toolbar, create a beforeload store event where you retrieve the values from your toolbar, then set the store’s proxy extraParams values to be the filter parameters you want passed.  OK, that’s a mouthful so let me show it in steps.

1.  Assign id’s to the toolbar parameters. (screen shot of the checkbox below)

 

image

 

2.  Create a beforeload event in your store for the gridview and get the components you want

 

image

 

3.  Put some code in the beforeload even that gets these components, then sets the ExtraParams value associated with the stores proxy.

var checkboxerroronly = Ext.getCmp('checkboxerroronlyid');
var usernamefilter = Ext.getCmp('usernamefilterid').getValue();

var displayErrorOnly = checkboxerroronly.checked;
store.proxy.extraParams.errorsOnly = displayErrorOnly;
store.proxy.extraParams.username = usernamefilter;

4. And just run it!  If you look at your network traffic, you will see both the errorsOnly and username parameters passed on every page refresh and page forward and back.

 

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Hope this helps!

(sorry, no source code for this one, just some tips in the middle of a project I’m doing)

About Peter Kellner

Peter is a software professional specializing in mobile and web technologies. He has also been a Microsoft MVP for the past 7 years. To read more about Peter Kellner and his experience click here. For information about how Peter Kellner might be able to help you with your project click here.

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Comments

  1. warleyalex says:

    Hi,

    I liked your article using Sencha Architect with ASP.NET.

    Please, I’m not sure, I don’t know barely anything about ASP.NET.

    With PHP, results the interaction between ExtJS and the server is simply bring down Json or Xml results from PHP. The client renders a new page/view, using JS.

    with ASP.NET Web server controls perform postbacks initiated by a user action on the page, such as clicking a button. In the response, the server renders a new page, brings down views in HTML format. The client simply render the page.

    Your approach is working with ASP.NET and ExtJS, a mixture of theses two worlds.
    ………….
    Why don’t you use asp.net controls to render views?
    Is it easy deploy ASP.NET applications?
    ASP.NET is better than PHP?

    Regards,
    warleyalex from Brazil.

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