DateTime first day of week
datetime-first-day-of-week.aspx
<%@ Page Language="C#" AutoEventWireup="true"%>
<!DOCTYPE html>
<script runat="server">
public static DateTime getFirstDayOfWeek(DateTime dateToCheck, string firstDay)
{
DateTime dt=new DateTime();
for (int i = 0; i < 7; i++)
{
if (dateToCheck.AddDays(-i).DayOfWeek.ToString() == firstDay)
{
dt= dateToCheck.AddDays(-i);
}
}
return dt;
}
protected void Button1_Click(object sender, System.EventArgs e)
{
//initialize a datetime variable with today
DateTime today = DateTime.Today;
Label1.Text = "today : " + today.ToLongDateString();
DateTime firstDayOfWeek = getFirstDayOfWeek(today, "Monday");
Label1.Text += "<br ><br />start day of week : ";
Label1.Text += firstDayOfWeek.ToLongDateString();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>c# example - datetime first day of week</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:MidnightBlue; font-style:italic;">
c# example - datetime first day of week
</h2>
<hr width="550" align="left" color="Gainsboro" />
<asp:Label
ID="Label1"
runat="server"
Font-Size="Large"
Font-Names="Comic Sans MS"
>
</asp:Label>
<br /><br />
<asp:Button
ID="Button1"
runat="server"
Text="get first day of week"
OnClick="Button1_Click"
Height="40"
Font-Bold="true"
/>
</div>
</form>
</body>
</html>

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