C# 数据库 There is already an open DataReader associated with this Command which must b
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在c#编程时我想让整个程序公用一个连接，不过我发现我想法太单纯了，遇到了题目中所说的:There is already an open DataReader associated with this Command which must ...问题。
上网找了一些技术博客，有一些解决方案是关于数据库池的(EXCUSE ME,太高级了，我不会啊)
于是我找到了一个比较简单解决方案
每一次都重新建立连接，在关掉链接，问题解决。
但是关于程序执行效率这块就不知道了，感觉肯定会慢啊。
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