[英]Compare two dates in ASP calender
I am a noob at ASP, I am trying to take take a selected date from an ASP calendar and save that in a textbox or something that I can compare with the second selected date so that the second is larger. 我是ASP的菜鸟,我想从ASP日历中选取一个选定的日期,并将其保存在文本框中,或者将其与第二个选定的日期进行比较,以使第二个更大。 I'm not sure if it is possible while just using one calendar.
我不确定仅使用一个日历是否有可能。 I tried but do not know how to save the first date collection for comparison.
我尝试过但不知道如何保存第一个日期集合以进行比较。 I tried both ways but failed miserable.
我尝试了两种方式,但失败了。 I did do a search but they are using javascript, or java and other languages I do not know.
我确实做了搜索,但他们使用的是JavaScript,Java或其他我不知道的语言。
What I want to do: I am trying to take two separate inputted dates from user. 我想做什么:我正在尝试从用户那里输入两个单独的日期。 when 1st date is inputted, store in something, then validate that the user selects a date after the 1st selected date.
输入第一个日期时,将其存储在某物中,然后验证用户是否选择了第一个选定日期之后的日期。 If not return error message
如果没有返回错误信息
<asp:TextBox ID="response" runat="server" />
<asp:TextBox ID="caldate1" runat="server" />
<asp:TextBox ID="caldate2" runat="server" />
<asp:CompareValidator ID="calvalidae" runat="server" ControlToCompare="caldate1" ErrorMessage="Date should be later than first date" Type="Date" operator="GreaterThan" ValueToCompare="caldate2"></asp:CompareValidator>
<asp:Calendar ID="cal1" runat="server"></asp:Calendar>
<asp:Calendar ID="cal2" runat="server" SelectionMode="Day" OnSelectionChanged="cal1_SelectionChanged" ></asp:Calendar>
//serverside //服务器端
protected void cal1_SelectionChanged(object sender, EventArgs e)
{
caldate1.Text = cal1.SelectedDate.ToShortDateString();
if (cal1.SelectedDate.Date > cal2.SelectedDate.Date)
{
caldate1.Text = "You selected ";
caldate1.Text += cal1.SelectedDate.ToShortDateString();
}
else
{
caldate1.Text = "Select a valid date";
}
}
If you just want to compare the dates in code behind do the below 如果您只想比较后面代码中的日期,请执行以下操作
Markup 标记
<asp:CompareValidator ID="calvalidae" runat="server"
ControlToValidate ="caldate1" ValueToCompare="text" ControlToCompare="caldate2"
ErrorMessage="Date should be later than first date" Type="Date"
operator="GreaterThan" ></asp:CompareValidator><br/>
<asp:Calendar ID="cal1" runat="server" OnSelectionChanged="cal1_SelectionChanged1"></asp:Calendar><br/>
<asp:Calendar ID="cal2" runat="server" SelectionMode="Day" OnSelectionChanged="cal2_SelectionChanged" ></asp:Calendar><br/>
</div>
Code Behind 背后的代码
protected void cal1_SelectionChanged1(object sender, EventArgs e)
{
caldate1.Text = cal1.SelectedDate.ToShortDateString();
IsValidDate();
}
protected void cal2_SelectionChanged(object sender, EventArgs e)
{
caldate2.Text = cal2.SelectedDate.ToShortDateString();
IsValidDate();
}
private void IsValidDate()
{
response.Text = string.Empty;
if (cal1.SelectedDate > cal2.SelectedDate)
{
response.Text = "Date should be later than first date";
}
}
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