开始 ^ ];您可能会在其中找到一些想法.如果不是，请尝试使用Google搜索，或者看到这是一个非常简单的问题，然后尝试自己解决.考虑一下如何比较两个值并确定如果a)匹配或b)不匹配该怎么办.

hai to all, i have to match the textbox data to the datbase data ,if it is matched no changes if it is not matched the textbox new value has to saved in the database in place of old value. plz help me .......thanks in advance...........

Start here[^]; you might find some ideas in there. If not, try Googling or, seeing as this is a really simple problem, try solving it yourself. Think about how you might compare two values and decide what to do if they a) match or b) don''t match.