Hello @goga21cn! Welcome to Ext.NET forums and thanks for the interest in our product!
1) Actually there is available the Ext.NET 4.1.0 (Includes Ext JS 6.0.2 commercial). But if you check in this sencha post https://www.sencha.com/store/extjs/#CompareSenchaExtJS
it say there are version Standard, Pro and Premium. My question is, which version is it included en Ext.Net?
Neither of those. Ext.NET is shipped with ExtJS 6.0.2 (or 6.2.1 when Ext.NET 4.2.0 is out) commercial license shaped specifically for use with Ext.NET. You can use ExtJS and Sencha CMD with the ExtJS sources you get with the package, but you are not eligible to write ExtJS-only applications (and host+run them separate from Ext.NET, like in different projects, websites, etc).
has a couple more questions you may ask yourself about licensing, it is not extensive so worth taking a quick look.
2) The next public release will be Ext.NET 4.2.0. (Q4 2016). Do you have an specific date for the final release of the 4.2.0 version?
We are working on the 4.2.0 release right now but we don't have a specific date for its release yet.
3) Why there are more webforms examples than mvc? Any special reason?
Usually we only write a given MVC example either to demonstrate a major feature or when it really introduces a new aspect to the programming or technique. For example, partial view (partial dynamic rendering) is something very different from what we would use in WebForms versions, so we got a whole category for these examples. Some other examples need a very different way to catch data to display on, say, a GridPanel. But when things start to become redundant, just mechanical translation from WebForms' ASPX syntax to RazorView syntax, we don't really bother translating the examples. If they don't really introduce something new, it would not really be hard for one to read the WebForms version and run it in MVC. Worst case, there would be lots of other examples that already do what it takes to port one example from WebForms to MVC.
So the choice was just not to be redundant with samples that don't introduce new features, yet moving over highlights to major features.
By the way, Any agency in China?
I understand this question as if there's some physical representation of Ext.NET sales, an Object.NET (Ext.NET's company name) office. The answer is no. All acquisition information is made available at our store page and we offer means for people/companies anywhere in the world to purchase Ext.NET. Well, at least as far as we know or can handle. I personally never heard of a restriction in given countries that can prevent companies from purchasing and using Ext.NET.
I hope the explanations above are clear, but let us know if you still have any questions about Ext.NET!