dropdown dissapear after value selected.

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hi,

i have a situation when user select value from 1st dropdownlist then item in 2nd dropdown list appear according to the selected value from the first.lastly the form will appear after value in 2nd dropdown is selected.

my problem is whenever user finish select the 2nd dropdown, the 2nd dropdown is dissapear but the form is there.

help me.i have to submit this project ~~asap~~ :(

thanx

Posted 12-Dec-11 0:50am

musiw

Updated 12-Dec-11 5:50am

Monjurul Habib

v2

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Comments

koolprasad2003 12-Dec-11 6:55am

please show use the code (aspx and code behind)

[no name] 12-Dec-11 6:56am

How are you handling the selection and display of form?

S.P.Tiwari 12-Dec-11 7:08am

need to see your code.

KiranBabu M 12-Dec-11 7:27am

can u Post your code?

[no name] 12-Dec-11 11:57am

Give Your Code

4 solutions

Solution 1

When page_load fire on page after any event then dropdownlist2 is not visible. so check through condition under :

C#

 protected void Page_Load(object sender, EventArgs e)
    {
if (dropdownlist2.SelectedIndex!=0)
     dropdownlist2.visible=true;
else
     dropdownlist2.visible=false;

}

go through this. Hope this will help you.
Don't forget to mark as answer if it helps. :)

Posted 12-Dec-11 1:31am

Manish.Insan

Comments

musiw 12-Dec-11 21:40pm

hi manish...

i already try your code.it visibles.not dissapear as earlier.but now one problem is....the item in the dropdown turn empty.only the dropdown shows there... hihi

Solution 2

It looks like you are hiding the dropdown2 on by default (may be on page_load) and show the dropdown2 when user selects an item in dropdown1.

Check whether you have the code to hide the dropdown2 in pageload but outof if(!IsPostBack){}.

Share your code to get the appropiate solution.

Posted 12-Dec-11 1:33am

Sudheer Kumar K

Solution 4

Hi,

Check these links. It might help you:

http://www.aspdotnet-suresh.com/2011/01/introduction-here-i-will-explain-how-to.html[^]

http://csharpdotnetfreak.blogspot.com/2009/03/populate-dropdown-based-selection-other.html[^]

Regards,
Eduard

Posted 12-Dec-11 14:23pm

Eduard Lu

Comments

musiw 12-Dec-11 20:45pm

protected void Page_Load(object sender, EventArgs e)
{

ddl2.Visible = false;
Panel1.Visible = false;

if (!IsPostBack)
{
ddl2.Items.Clear();
}

}
protected void ddl1_SelectedIndexChanged(object sender, EventArgs e)
{
if (ddl1.SelectedIndex == 1)
{

ListItem item;
item = new ListItem("Please Select", "Please Select");
ddl2.Items.Add(item);
item = new ListItem("KVDT & RIDT", "KVDT & RIDT");
ddl2.Items.Add(item);
item = new ListItem("Outside DT", "Outside DT");
ddl2.Items.Add(item);

ddl2.Visible = true;

}

if (ddl1.SelectedIndex == 2)
{
ListItem item;
item = new ListItem("Please Select", "Please Select");
ddl2.Items.Add(item);
item = new ListItem("ETS/EMU", "ETS/EMU");
ddl2.Items.Add(item);
item = new ListItem("Locomotive", "Locomotive");
ddl2.Items.Add(item);

ddl2.Visible = true;
}
}

protected void ddl2_SelectedIndexChanged(object sender, EventArgs e)
{
Panel1.Visible = true;
}

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Monjurul Habib · Accepted Answer · 2011-12-12T06:00:00

As you didn't provide your code it is very difficult to identify where is your problem. I am providing you some nice links for your better understanding what you need to do. Please go through the following links:

CascadingDropDown Demonstration
Using CascadingDropDown with a Database
Populate Cascading DropDownList based on selection of other dropdown ASP.NET
how to populate dropdown based on other dropdown or working with cascading dropdowns in asp.net
Ajax Cascading Dropdownlist Sample with database using asp.net

Every single link will guide you to implement Cascading DropDown.

dropdown dissapear after value selected.

4 solutions

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Solution 2

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Solution 4

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