Date Validation Check

workidoo · March 21st, 2009, 06:32 AM

<form id="form1" runat="server">
<div>
Arrival Date:
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> 
<asp:RangeValidator ID="RangeValidator1" runat="server"
Text="You must only select a date within the next two weeks."
ControlToValidate="TextBox1" Type="Date"></asp:RangeValidator><br />
<br />
Select your arrival date:<br />
<asp:Calendar ID="Calendar1" runat="server"
OnSelectionChanged="Calendar1_SelectionChanged"></asp:Calendar>
 
<br />
<asp:Button ID="Button1" runat="server" Text="Button"
OnClick="Button1_Click" />
<br />
<br />
<asp:Label ID="Label1" runat="server"></asp:Label>
</div>
</form>

Code Behind

Partial Class Chapter_4_dateValidationCheck
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
RangeValidator1.MinimumValue = DateTime.Now.ToShortDateString()
RangeValidator1.MaximumValue = DateTime.Now.AddDays(14).ToShortDateString()
End Sub

Protected Sub Calendar1_SelectionChanged(ByVal sender As Object, _
ByVal e As System.EventArgs)
TextBox1.Text = Calendar1.SelectedDate.ToShortDateString()
End Sub

Protected Sub Button1_Click(ByVal sender As Object, _
ByVal e As System.EventArgs)
If Page.IsValid Then
Label1.Text = "You are set to arrive on: " & TextBox1.Text
End If
End Sub
End Class

I got the following error:

The value of property Maximum Value for RangeValidator1 can not convert to type Date

Lee Dumond · March 21st, 2009, 09:55 AM

Page_Load is too late to set MinimumValue and MaximumValue. Use Page_Init instead.

Code:

 Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
     RangeValidator1.MinimumValue = DateTime.Now.ToShortDateString()
     RangeValidator1.MaximumValue = DateTime.Now.AddDays(14).ToShortDateString()
 End Sub
 
 Protected Sub Calendar1_SelectionChanged(ByVal sender As Object, _
 ByVal e As System.EventArgs)
     TextBox1.Text = Calendar1.SelectedDate.ToShortDateString()
 End Sub
 
 Protected Sub Button1_Click(ByVal sender As Object, _
 ByVal e As System.EventArgs)
     If Page.IsValid Then
         Label1.Text = "You are set to arrive on: " & TextBox1.Text
     End If
 End Sub

workidoo · March 21st, 2009, 11:02 AM

Thanks for the tip!

Btw it works with load too I just forgot to add HandlesMe.Load

Lee Dumond · March 21st, 2009, 11:13 AM

Oh yeah, I didn't see that you forgot the handler. Should have looked more closely...