BindingSource 按日期过滤 [英] BindingSource Filter by date

问题描述

我想根据日期从数据库中过滤值.

I want to filter values from database based on date.

数据库中的日期包含如下值:2008-12-28 18:00:00.我的班级有一个 DateTime 变量，具体取决于我要过滤的内容.理想情况下，它会像这样工作:myBindingSource.Filter = "DATE(myDateField) = myDateTime.Date" + 根据需要调整 myDateTime.Date 格式.

Date in a database contains values like this: 2008-12-28 18:00:00. And my class has a DateTime variable depending on which I want to filter. Ideally it would work like this: myBindingSource.Filter = "DATE(myDateField) = myDateTime.Date" + adjusting myDateTime.Date format as needed.

但它抛出一个 EvaluateException:表达式包含未定义的函数调用 DATE()."

But it throws an EvaluateException: "The expression contains undefined function call DATE()."

虽然如果我直接执行SQL语句，我可以在过滤器中使用DATE()函数.

Although if I execute the SQL statement directly, I can use the DATE() function in filter.

附言我将 MYSQL DB 与 Connector/Net 5.2 一起使用

P.S. I use MYSQL DB with the Connector/Net 5.2

我该如何解决这个问题?

How can I solve this problem?

谢谢大家的建议.

推荐答案

不需要 getSqlDate 函数.您可以使用 String.Format() 来格式化日期:

The getSqlDate function is not needed. You can use String.Format() to format dates:

String.Format("{0:yyyy-MM-dd} 00:00:00", myDateTime)

或

myDateTime.Date.ToString("yyyy-MM-dd") + " 00:00:00"

您可以像这样过滤绑定源:

You could filter the binding source like this:

myBindingSource.Filter = String.Format("myDateField >= '{0:yyyy-MM-dd}' AND myDateField < '{1:yyyy-MM-dd}'", myDateTime, myDateTime.AddDays(1));

这篇关于BindingSource 按日期过滤的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！