两个日期选择器之间的选择(Selection between two date pickers)

两个日期选择器之间的选择(Selection between two date pickers)

这是我为了在两个日期之间进行选择而编写的代码（使用DateTimePicker对象）

var query = db.people.AsQueryable(); var fromDate = Convert.ToDateTime(dateTimePicker1); var toDate = Convert.ToDateTime(dateTimePicker2); query = query.Where(x => x.dob > fromDate && x.dob < toDate); clan_savezaBindingSource.DataSource = query.ToList();

当我运行代码时，出现错误，说出InvalidCastException 。 我想我应该使用Convert.ToDate以外的东西，但我找不到解决方案。

This is the code that I wrote in order to make a selection between two dates (using DateTimePicker objects)

var query = db.people.AsQueryable(); var fromDate = Convert.ToDateTime(dateTimePicker1); var toDate = Convert.ToDateTime(dateTimePicker2); query = query.Where(x => x.dob > fromDate && x.dob < toDate); clan_savezaBindingSource.DataSource = query.ToList();

When I run the code the error appears saying InvalidCastException. I guess I should use something other than Convert.ToDate but I can't find a solution.

最满意答案

您应该使用DateTimePicker Value属性。 它返回选择日期作为DateTime对象：

var fromDate = dateTimePicker1.Value; var toDate = dateTimePicker2.Value;

注意： DateTimePicker不是DateTime对象。 并且它不能转换为DateTime 。 DateTimePicker是一个用户控件，它保存DateTime值并提供许多用于呈现自身和处理用户输入的功能。

进一步阅读： 使用DateTimePicker控件

You should use Value property of DateTimePicker. It returns selected the date as DateTime object:

var fromDate = dateTimePicker1.Value; var toDate = dateTimePicker2.Value;

Note: DateTimePicker is not a DateTime object. And it's not convertible to DateTime. DateTimePicker is a user control which holds DateTime value and provides a lot of functionality for rendering itself and processing user input.

Further reading: Using DateTimePicker Control