Ajax request WebService cross-domain problem solution

This article mainly introduces the solution to the cross-domain problem of Ajax requesting WebService. This article introduces it to you in great detail and has the value of reference and learning ajax. It is of great value to ajaxInterested friends can refer to the following

1. Background

## Using Ajax in Jquery in asp.net development environment Calling the WebService interface

2. Problems

Cause analysis: The browser has the same origin The impact of the policy (i.e. JavaScript or Cookie can only access content under the same domain);

3. Solution:

(1) JSONP: Only supports GET method

(2) CROS: Cross-domain resource sharing

The following is the CROS solution:

a. Add response header information to the WebService interface:

b. Add relevant configuration section information to the web.config file:

After applying solution a or b, the browser header information changes as follows:

In the end the problem was better solved, but for this Each browser supports different solutions. The attached picture is as follows:

The above is the solution to the cross-domain problem of Ajax requesting WebService introduced by the editor. I hope to be helpful! !

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