Solved

Validate Range between 2 dropdown boxes

Posted on 2009-05-14
7
350 Views
Last Modified: 2012-05-07
Hi Experts,
 I have 2 dropdownlists in my webpart.   (project start and project end).  Each dropdown contains integers, which represent years. (ie, 2008, 2009, 2010, etc)

I need to ensure that projects dont span more than 10 years with a validator control.
I've been trying to use rangeValidator, but it gets confused between postbacks and isn't working.

Any ideas?




0
Comment
Question by:SOS_Helpdesk
  • 3
  • 3
7 Comments
 
LVL 10

Expert Comment

by:MaxOvrdrv2
ID: 24385023
why don't you simply validate it either server-side or client-side? i don't like validators :S

simply check it.
0
 

Author Comment

by:SOS_Helpdesk
ID: 24385091
Ah cmon, thats no fun!
Forever trying to get a handle on these .NET controls.

If nobody else can help, i'll have to do it manually and will award points.

Thanks,
0
 
LVL 10

Expert Comment

by:MaxOvrdrv2
ID: 24385119
i think the rang validators only work on textboxes... e.g.: range in text should be between 1 and 100... doesn't check 2 controls...
0
Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

 

Author Comment

by:SOS_Helpdesk
ID: 24385165
Could a custom-Validator do the trick?
0
 
LVL 10

Accepted Solution

by:
MaxOvrdrv2 earned 500 total points
ID: 24385311
yes, but it would come back to doing it manually... the only thing is that you would put the validation code inside the validator block and not directly in your save/submit function... that would be the only difference really... but yes, you can do that.
0
 
LVL 3

Expert Comment

by:channa_m
ID: 24386992
You can use a dummy textbox to store the value of difference and apply the range validator on the textbox

See below
 <form id="form1" runat="server">
        <div>
            <asp:DropDownList ID="ddlStartDate" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList_SelectedIndexChanged">
                <asp:ListItem>2008</asp:ListItem>
                <asp:ListItem>2009</asp:ListItem>
                <asp:ListItem>2010</asp:ListItem>
                <asp:ListItem>2007</asp:ListItem>
            </asp:DropDownList>
            <asp:DropDownList ID="ddlEndDate" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList_SelectedIndexChanged">
                <asp:ListItem>2008</asp:ListItem>
                <asp:ListItem>2009</asp:ListItem>
                <asp:ListItem>2010</asp:ListItem>
                <asp:ListItem>2007</asp:ListItem>
            </asp:DropDownList>
            <asp:RangeValidator ID="RangeValidator1" runat="server" ControlToValidate="TextBox1"
                ErrorMessage="RangeValidator" MaximumValue="10" MinimumValue="0" Visible="false"></asp:RangeValidator>
            <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox></div>
    </form>
 
 
 
 
protected void DropDownList_SelectedIndexChanged(object sender, EventArgs e)
    {
        TextBox1.Text = Convert.ToInt32(ddlStartDate.SelectedValue) - Convert.ToInt32(ddlEndDate.SelectedValue);
    }

Open in new window

0
 

Author Closing Comment

by:SOS_Helpdesk
ID: 31581445
Custom Validator worked quite nicely.  just finished setting it up, took approximately 20 minutes.  Thanks!
0

Featured Post

Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

ASP.Net to Oracle Connectivity Recently I had to develop an ASP.NET application connecting to an Oracle database.As I am doing it first time ,I had to solve several problems. This article will help to such developers  to develop an ASP.NET client…
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question