如何验证所选日期是星期一 [英] how to validate selected date is monday

问题描述

我的代码如下



DateTime selecteddate = Txtfromdate.SelectedDateValue.ToString（）;

if（selecteddate.DayOfWeek！= DayOfWeek .Monday）

{

lblmsg.Text =哟必须只选择星期一日期;

返回;

$





当执行上面的代码时显示错误如下



不能隐式地将类型'string'转换为'System.DateTime'



以上错误在下面的行显示如下

DateTime selecteddate = Txtfromdate.SelectedDateValue.ToString（）;



请帮帮我。

My code as follows

DateTime selecteddate = Txtfromdate.SelectedDateValue.ToString();
if (selecteddate.DayOfWeek != DayOfWeek.Monday)
{
lblmsg.Text = "Yo must select the monday date only";
return;
}


wheni execute the above code shows error as follows

Cannot implicitly convert type 'string' to 'System.DateTime'

The above error shows in below line as follows
DateTime selecteddate = Txtfromdate.SelectedDateValue.ToString();

please help me.

推荐答案

好吧，不要不要尝试将字符串分配给日期时间变量！这样的事情出了什么问题：

Well, than don't try to assing a string to a datetime variable! What's wrong with something like this:

if (Txtfromdate.SelectedDateValue.DayOfWeek != DayOfWeek.Monday)
{
lblmsg.Text = "Yo must select the monday date only";
return;
}

假设 SelectedDateValue 字段的类型为 DateTime ，因为不清楚什么类型的对象 Txtfromdate 是。

Assuming that SelectedDateValue field is of type DateTime, since it is not clear what kind of object Txtfromdate is.

不要使用ToString（），使用



Txtfromdate.SelectedDate.ToShortDateString（）

Dont use ToString(), Use

Txtfromdate.SelectedDate.ToShortDateString()

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