JS drop-down box linkage and Anthem Components

For a drop-down box cascade, it is something that developers must know.

Projects also need cascade a few days ago. however, what is special is not only three-level linkage. the code found on the internet is well written. changing a place involves many things. inconvenient.

Finally, I found an anthem component on the Internet. I personally feel that it is very convenient to use this component. I don't need to write JS Code at all, and the operation is relatively simple and free.

The method is very simple. Step 1: Put anthem. dll under the bin directory of the project.

Step 2: Add a code on the top of the ASPX page, and change <asp: dropdownlist> </ASP: dropdownlist> to <anthem: dropdownlist> </anthem: dropdownlist>, add the autocallback = "true" attribute.

Step 3: Write the query code in the onselectedindexchanged = "dropdownlist1_selectedindexchanged" event of <anthem: dropdownlist>.

The following is the specific code: There is a comment in it. I believe you can understand it ..

ASPX page

Aspx. CS page

SQL. CS file. Query

 

Anthem. dll component

Source code, including the database, tested