ASP.NET RangeValidator's MaximumValue cannot convert to type Date

Question

I have a simple ASP.NET page, and in it I am trying to validate a date. The date picked must be greater than or equal to today's date.

I am getting an error which says "The value '26/04/2104 13:55:38' of the MaximumValue property of 'DateCheck' cannot be converted to type 'Date'" when I try to do this.

Here is the code in the aspx:

 Date: <asp:Calendar ID="txtDate" runat="server" BackColor="White" 
        BorderColor="#999999" CellPadding="4" DayNameFormat="Shortest" 
        Font-Names="Verdana" Font-Size="8pt" ForeColor="Black" Height="180px" 
        Width="200px">
        <DayHeaderStyle BackColor="#CCCCCC" Font-Bold="True" Font-Size="7pt" />
        <NextPrevStyle VerticalAlign="Bottom" />
        <OtherMonthDayStyle ForeColor="#808080" />
        <SelectedDayStyle BackColor="#666666" Font-Bold="True" ForeColor="White" />
        <SelectorStyle BackColor="#CCCCCC" />
        <TitleStyle BackColor="#999999" BorderColor="Black" Font-Bold="True" />
        <TodayDayStyle BackColor="#CCCCCC" ForeColor="Black" />
        <WeekendDayStyle BackColor="#FFFFCC" />
    </asp:Calendar><br /><br />

    <asp:RangeValidator ID="DateCheck" runat="server" ErrorMessage="The date must be greater than or equal to current date" ControlToValidate="txtDate" 
    Display="Dynamic" Type="Date" ></asp:RangeValidator >

and here is the code behind file:

protected void Page_PreRender(object sender, EventArgs e)
    {
        DateCheck.MinimumValue = DateTime.Now.ToString();
        DateCheck.MaximumValue = DateTime.Now.AddYears(90).ToString();
    }

Can anyone help with solving this?

Answer 1

I guess Easily you can achieve this through Javascript My way is below

Firstly get todays Day like this

function validate_date(date_to_validate)
{
        var today = new Date();
        var dd = today.getDate();
        var mm = today.getMonth()+1; //January is 0!
        var vdate[]=date_to_validate.split('/');// Assuming Formated Date You will pass in mm/dd/yyyy
        var yyyy = today.getFullYear();

        if(dd<10) {
            dd='0'+dd
        } 
        if(mm<10) {
            mm='0'+mm
        } 
        today = mm+'/'+dd+'/'+yyyy;

        if(vdate[2]>yyyy+90 ||vdate[2]<yyyy)
        {
            return false;
        }else if(vdate[2]==yyyy && ( vdate[0]<mm ))
        {
           return false;
        }else if(vdate[2]==yyyy && (vdate[1]<dd))
        {
           return false;
        }
        else
        {
           return true;
        }
}

And this function return true for your min and max date condition else returns false...

I think Range validator Can Support string range ,integer range.... And you validating on server which will cost you extra request and response.... using client side validation you can do better