Display DB values in a dropdownlist

Question

I am displaying values from a database into a dropdownlist. but I am unable to get the corresponding values into the DDL.

if (dt.Rows.Count > 0)
            {
                DataTable dt1 = new DataTable();
                dt1 = bll.getnewid(TextBox1.Text);

                    if (dt1.Rows.Count > 0)
                    {

                        Session["pid"] = dt1.Rows[0]["NewidColumn"].ToString();
                        Session["email"] = dt1.Rows[0]["EmailID"].ToString();
                        Session["gender"] = dt1.Rows[0]["Gender"].ToString();
                        Session["mobile"] = dt1.Rows[0]["MobileNo"].ToString();
                        Session["country"] = dt1.Rows[0]["Country"].ToString();
                        Session["state"] = dt1.Rows[0]["State"].ToString();
                      }

and I am displaying like this

   DropDownList1.Text = Session["country"].ToString();
            DropDownList2.Text = Session["state"].ToString();

I am able to get the country and state values in the datatable. but I am unable to display them in the DDL.

Answer 1

DropDownList1.Items.Add(new ListItem(Session["country"].ToString()); 
DropDownList2.Items.Add(new ListItem(Session["state"].ToString());

Answer 2

DropDownList1.Items.Add(new ListItem(Session["country"].ToString()); 
DropDownList2.Items.Add(new ListItem(Session["state"].ToString());
Dropdownlist2.databind();
Dropdownlist1.databind();

Answer 3

您需要设置下拉列表的SelectedValue或SelectedIndex属性。

Answer 4

try like this

   DropDownList1.Items.Add("yourvalue");
   DropDownList1.Items.Add(Session["country"].ToString());

Answer 5

Try This Code :

DropDownList1.Items.Insert(0, new ListItem(Session["country"].ToString(), "0"));
DropDownList1.DataBind();

DropDownList2.Items.Insert(0, new ListItem(Session["state"].ToString(), "0"));
DropDownList2.DataBind();

Answer 6

What is the need of using sessions ..? Instead try this..hope it works. After this line of code (dt1 = bll.getnewid(TextBox1.Text);) use this two lines instead of sessions.

DropDownList1.DataSource=dt1;
DropDownList1.DataTextField="Country";
DropDownList1.DataValueField="Country";
DropDownList1.DataBind();
DropDownList2.DataSource=dt1;
DropDownList2.DataValueField="Country";
DropDownList2.DataValueField="Country";
DropDownList2.DataBind();