DropDownList_SelectedIndexChanged() doesn't work[Answered] RSS

• • Reply
  nat06

  Member

  60 Points

  547 Posts

  DropDownList_SelectedIndexChanged() doesn't work

  Apr 09, 2014 10:42 AM|nat06|LINK

  Hi,

  I have this code, and I connected the SelectedIndexChanged event to the DropDownList but on selecting an item it doesn't do anything:

   protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
          {
            
              String Ime = DropDownList1.SelectedItem.Value.Trim();
              
  
              SqlCommand inSqlCommand =
                      new SqlCommand("listIncidents", conn);
              inSqlCommand.CommandType = CommandType.StoredProcedure;
              SqlParameter inParameter = new SqlParameter
                  ("@Iname", SqlDbType.NVarChar, 60);
              inParameter.Direction = ParameterDirection.Input;
              inParameter.Value = Ime;
              inSqlCommand.Parameters.Add(inParameter);
  
              SqlDataReader inSqlDataReader;
              try
              {
                  conn.Open();
                  inSqlDataReader = inSqlCommand.ExecuteReader();
  
                  while (inSqlDataReader.Read())
                  {
                      txtName.Text = inSqlDataReader[0].ToString();
                      txtLattitude.Text = Convert.ToString(inSqlDataReader[2]);
                      txtLongitude.Text = Convert.ToString(inSqlDataReader[1]);
                  }
                  inSqlDataReader.Close();
              }
              catch (SqlException exc)
              {
                  Response.Write(exc.ToString());
              }
              catch (Exception ex)
              {
                  Response.Write(ex.ToString());
              }
              finally
              {
                  conn.Close();
              }
          }

  Can anybody help me what might be wrong?

  Thanks

• • Reply
  AidyF

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  Re: DropDownList_SelectedIndexChanged() doesn't work

  Apr 09, 2014 10:48 AM|AidyF|LINK

  The event fires when the form is submitted (ie the user clicks a submit button).  If you want the event to fire right away then add the

  AutoPostback="True"

  attribute to your droplist.

  I'm afraid I no longer use this forum due to the new point allocation system.
• • Reply
  A2H

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  Re: DropDownList_SelectedIndexChanged() doesn't work

  Apr 09, 2014 10:48 AM|A2H|LINK

  Have you set DropDownList AutoPostBack property to true.if not please set it.

  <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" 
          onselectedindexchanged="DropDownList1_SelectedIndexChanged">
      </asp:DropDownList>

  Thanks,
  Aje
  My Blog | Dotnet Funda
• • Reply
  oned_gk

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  Re: DropDownList_SelectedIndexChanged() doesn't work

  Apr 09, 2014 11:00 AM|oned_gk|LINK

  Make sure you populate DropDownList items inside if(!IsPostBack) block
  Programming to simplify, don't look for difficult way
  Suwandi - Non Graduate Programmer
• • Reply
  nat06

  Member

  60 Points

  547 Posts

  Re: DropDownList_SelectedIndexChanged() doesn't work

  Apr 09, 2014 11:05 AM|nat06|LINK

  Thanks to all of you