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lovitaxxxx asked:

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How to fill a second dropdownlist based on the selection made in the first one.
i want to use a condition:
for example:
 
 protected void dropdownlist1_SelectedIndexChanged(object sender, EventArgs e)
        {
 
            if (dropdownlis1t.SelectedValue == "1")
            {
                SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings[""].ConnectionString);
                con.Open();
 
                SqlCommand cmd = new SqlCommand("Select [Code] from Table where Index= '3' OR Index= '2'", con);
                SqlDataAdapter da = new SqlDataAdapter(cmd);
                DataSet ds = new DataSet();
                da.Fill(ds);
                con.Close();
                dropdownlist2.DataSource = ds;
                dropdownlist2.DataTextField = "Code";
                dropdownlist2.DataValueField = "Code";
                dropdownlist2.DataBind();
               
            }
            else
                if (dropdownlist1.SelectedValue == "2")
                {
 
                    SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings[""].ConnectionString);
                    con.Open();
 
                      SqlCommand cmd = new SqlCommand("Select [Code] from Table where Index= '1'", con);
                SqlDataAdapter da = new SqlDataAdapter(cmd);
                DataSet ds = new DataSet();
                da.Fill(ds);
                con.Close();
                dropdownlist2.DataSource = ds;
                dropdownlist2.DataTextField = "Code";
                dropdownlist2.DataValueField = "Code";
                dropdownlist2.DataBind();
                }
Tags: C#, ASP.NET

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