DropDown liSt selection

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Hi

I am having two pages in my website.
One in default.aspx and other is default2.aspx.

In my default.aspx page, I am having one country drop down list(list items are India, USA, UK).

In my default2.aspx page, I am having states drop down list(list items are Andhrapardesh, Assam, Texas, California, London).

Now if i select 'India' in my country drop down of default page, it should be redirect to default2 page and AndhraPardesh, Assam should be display in states drop down list.

How is it possible??

Posted 9-Sep-12 20:05pm

.netHelperClass

Updated 14-May-19 2:04am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

v2

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__TR__ 10-Sep-12 2:14am

Just out of curiosity, would you mind telling why do you want to have the 2 dropdown lists in separate pages? Why not have both the dropdowns in same page ?

sanwar_mal_jat 10-Sep-12 2:22am

send your country_id selected indexchange event of your country drop down list from default.aspx page to default2.aspx and fill your state drop down list according country_id.........

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2012-09-09T20:26:00

You can do like this.

C#

protected void ddlCountry_SelectedIndexChanged(object sender, EventArgs e)
{
    Response.Redirect("default2.aspx?CountryID=" + ddlCountry.SelectedValue);
}

And in default2.aspx page...

C#

protected void Page_Load(object sender, EventArgs e)
{
     string country = String.Empty;
 
     if (!Page.IsPostBack)
     {
          if(Request.QueryString["CountryID"] != null)
          {
               country = Request.QueryString["CountryID"].ToString();
               PopulateStates(countryID);
          }
     }
}

Private void PopulateStates(string countryID)
{
     // Get the states from Database for the countryID and bind related values to 
     // the states dropdown.
}

prashant patil 4987 · Answer 2 · 2012-09-09T20:17:00

Use Query String for this:
Default.aspx.cs Page

C#

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
   {
       DropDownList str = sender as DropDownList;
       Response.Redirect("Default2.aspx?country=" + str.SelectedValue + "", false);
   }

Default2.aspx.cs Page

C#

if (Request.QueryString["country"] != null)
        {
            if (Request.QueryString["country"].ToString().ToUpper() == "INDIA")
            {
                DropDownList1.Items.Add("Andhrapardesh");
                DropDownList1.Items.Add("Assam");
            }
            else if (Request.QueryString["country"].ToString().ToUpper() == "USA")
            {
                DropDownList1.Items.Add("Texas");
                DropDownList1.Items.Add("California");
            }
            else if (Request.QueryString["country"].ToString().ToUpper() == "UK")
            {
                DropDownList1.Items.Add("London");
            }
        }

manognya kota · Answer 3 · 2012-09-09T20:17:00

Solution 1

Hi,

You can use a session variable to store the selection of country.
When redirecting to your default2 page,in the page load bind the dropdown list based on that session variable.

Hope this helps.

Posted 9-Sep-12 20:17pm

manognya kota

prashant_khairnar · Answer 4 · 2012-09-10T04:34:00

Solution 4

Hello

Passing data by URL will make security issue. So its recommended you will store country id in session and redirect to default2.aspx page using server.transfer instead of response.redirect for application performance point of view.

Please let us know if needed any more assistance.

Posted 10-Sep-12 4:34am

prashant_khairnar

DropDown liSt selection

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