下拉列表框中的困难

问题描述

嗨我有一个名为"addcategory"的表
其中有4个栏目类别，主题，问题，答案"
以aspx格式，我有两个下拉列表，一个用于添加类别，另一个用于广告主题
首先，我想在dropdown1中添加类别，然后从中选择一个类别，然后在dropdown2中添加相关主题，我还需要两个下拉列表中都没有重复的值，如果一个类别是该类别下的特定主题，也应该我可以在主题下拉列表中吗?请先在详细的thanx中向我详细介绍

解决方案

hii had a table named as ''addcategory''
in that there 4 cols ''category,subject,question,answer''
in aspx form i have two drop down lists one for add category and other to ad subject
first i want to add category in dropdown1 and from that i select one category then add the related subjects in dropdown2 i also need there is no repeated values in both drop down lists ,also if one category is the particular subjects which are under that category should be in the subject drop down list wt can i do ? plz hlp me in detailed thanx a lot in advance

解决方案

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