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Author  Topic  lala Starting Member 1 Post Posted - 2009-09-30 : 02:37:20 Hi, I want to display some values from DropDownList A based on selected values in DropDownList B. However, there's no common column names in the 2 tables I'm going to take datas from. How can I go about it? string strCon2 = Database.GetConStr(); SqlConnection sqlCon2 = new SqlConnection(strCon2); try { //bind the B dropdownlist string strSql2 = "SELECT D, P FROM Apple WHERE P = 'B' AND Status = 'Available' ORDER BY D"; SqlCommand sqlCmd2 = new SqlCommand(strSql2, sqlCon2); sqlCon2.Open(); SqlDataReader reader2 = sqlCmd2.ExecuteReader(); while (reader2.Read()) { ddlB.Items.Add(new ListItem(reader2["D"].ToString(), reader2["P"].ToString())); } reader2.Close(); } catch (Exception ex) { lblError.Text = ex.Message; } finally { sqlCon2.Close(); } protected void ddlB_SelectedIndexChanged(object sender, EventArgs e) { ddlA.Items.Clear(); //upon selected B, refresh A ddlA.Items.Add(new ListItem("All", "%")); string strCon5 = Database.GetConStr(); SqlConnection sqlCon5 = new SqlConnection(strCon5); try { //bind the A dropdownlist string strSql5 = "SELECT C, D, FROM Orange"; SqlCommand sqlCmd5 = new SqlCommand(strSql5, sqlCon5); sqlCmd5.Parameters.AddWithValue("@B", ddlB.SelectedValue); sqlCon5.Open(); SqlDataReader reader5 = sqlCmd5.ExecuteReader(); while (reader5.Read()) { ddlA.Items.Add(new ListItem(reader5["C"].ToString(), reader5["D"].ToString())); } reader5.Close(); } catch (Exception ex) { lblError.Text = ex.Message; } finally { sqlCon5.Close(); } }