Question

show hide fields based on dropdown selection

Asked by: -Dman100-

I am building a registration form and want to display and/or hide certain fields on the form based the selected value from a dropdown list.

When a user first hits the page, they are prompted to make a selection from a dropdown list.  No other form fields are visible on the page.  Once the user makes a selection, the appropriate form fields are displayed for the user to fill out.

What is the best way to accomplish this?  Any example would be appreciated.
Thank you.

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Asked On
2008-03-17 at 10:05:33ID23247690
Topics

Programming for ASP.NET

,

Visual Studio

Participating Experts
2
Points
500
Comments
4

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Answers

 

by: here4u247Posted on 2008-03-17 at 10:13:12ID: 21144138

you would use the selectedindex change event for the dropdownlist to show/hide form fields based on the selected value of the dropdown list....

hope that helps

C# Code:
 
        protected void DropDownList1_SelectedIndexChanged ( object sender, EventArgs e )
        {
//logic here
 
if(DropDownList1.SelectedValue=="1")
{
tbName.Visible=false;
}else
{
tbName.Visible=true;
}
}
 
ASPX Code:
 <asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
                   <asp:ListItem Value="0"></asp:ListItem>
                    <asp:ListItem Value="10"></asp:ListItem>
                     <asp:ListItem Value="1"></asp:ListItem>
                    </asp:DropDownList>
<asp:TextBox ID="tbName" runat="server"></asp:TextBox>

                                              
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by: IrzanaPosted on 2008-03-17 at 10:16:10ID: 21144167

Will the formfields differ based on the selected dropdown value.that means if item A selected the 2 texbox visible /if item B selected 3 texbox visible? is this the senario?
this problem have two solution.
one is using javascript to show/hide
other is using custom control
I need to know exactly how much form fields differ in each selected item of a dropdown?

 

by: -Dman100-Posted on 2008-03-17 at 10:37:41ID: 21144371

Hi Irzana,

Yes, the formfields will differ based on the selected dropdown value.

Many of the form fields are the same, but there a several formfields that need to be hidden or visible depending on the selected dropdown value.

 

by: IrzanaPosted on 2008-03-17 at 11:23:33ID: 21144729

So you have to code the visibily of each form fields under method
protected void DropDownList1_SelectedIndexChanged
{
}
Let me know if you need any furthur assistance

20120131-EE-VQP-002

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