Great god told how to solve the problem of dynamic binding, the drop-down list, but an error, I put the front controller DAL code and all the solution seems to be inside the controller, the codebehind (categories.aspx.cs) binding entries written to the corresponding method, I didn't write to, could you tell me how to write it?

CodePudding user response:

You see,
https://blog.csdn.net/hanjun0612/article/details/52120636