public void state()
{
DropDownList_state.DataSource = bs.bs_state();
DropDownList_state.DataTextField = "STATE";
DropDownList_state.DataValueField = "SID";
DropDownList_state.DataBind();
}
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
Bind();
HiddenField gen = GridView1.Rows[e.NewEditIndex].FindControl("HiddenField1") as HiddenField;
RadioButtonList rd = GridView1.Rows[e.NewEditIndex].FindControl("RadioButtonList1") as RadioButtonList;
rd.SelectedValue = gen.Value;
HiddenField age = GridView1.Rows[e.NewEditIndex].FindControl("HiddenField2") as HiddenField;
DropDownList ddage = GridView1.Rows[e.NewEditIndex].FindControl("DropDownList1") as DropDownList;
ddage.SelectedValue = age.Value;
HiddenField st = GridView1.Rows[e.NewEditIndex].FindControl("HiddenField3") as HiddenField;
DropDownList ddst = GridView1.Rows[e.NewEditIndex].FindControl("DropDownList_state") as DropDownList;
ddst.DataSource = bs.bs_state();
ddst.DataTextField = "STATE";
ddst.DataValueField = "SID";
ddst.DataBind();
HiddenField ct = GridView1.Rows[e.NewEditIndex].FindControl("HiddenField4") as HiddenField;
DropDownList ddct = GridView1.Rows[e.NewEditIndex].FindControl("DropDownList_city") as DropDownList;
int id = int.Parse(ddst.SelectedItem.Value);
bs.sid = id;
ddct.DataSource = bs.bs_city(bs);
ddct.DataTextField = "CITY";
ddct.DataValueField = "CITY";
ddct.DataBind();
}