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我这个下拉绑定的数据是
[{"P_ID":8826,"P_Name":"一类区","P_OrderNum":null,"ID":8826,"Name":"一类区"},{"P_ID":8827,"P_Name":"二类区","P_OrderNum":null,"ID":8827,"Name":"二类区"},{"P_ID":8828,"P_Name":"三类区","P_OrderNum":null,"ID":8828,"Name":"三类区"},{"P_ID":8829,"P_Name":"四类区","P_OrderNum":null,"ID":8829,"Name":"四类区"},{"P_ID":8830,"P_Name":"五类区","P_OrderNum":null,"ID":8830,"Name":"五类区"},{"P_ID":8831,"P_Name":"六类区","P_OrderNum":null,"ID":8831,"Name":"六类区"},{"P_ID":8832,"P_Name":"无","P_OrderNum":null,"ID":8832,"Name":"无"}]
效果图如下:
但有时候得到的值是“-1”,请问这个-1怎么得来的。
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