How to generate linkage checkbox (C #)? - checkbox

Question

initial we will see two checkbox
No.1: Fruit
No.2: Animals
if select checkbox1 then display
□ Bananas
□ Apple
if select checkbox2 then display
□ Dog
□ Cat
□ Monkeys
I do not know how to write it with asp.net(c#), (they begin with SQL binding lists), thank you very much !!!
the initial two checkbox is use
Front End:
<asp:CheckBoxList ID="chkFruit_animal" runat="server"
onload="CheckBoxFruit_animal_Load" >
</asp:CheckBoxList>
Code Behined:
protected void CheckBoxFruit_animal_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string sqlstr;
sqlstr = "SELECT DISTINCT * From fa";
MySqlDataAdapter myAdapter = new MySqlDataAdapter();
MySqlConnection dbconn = new MySqlConnection(WebConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
DataSet ds = new DataSet();
myAdapter.SelectCommand = new MySqlCommand(sqlstr, dbconn);
myAdapter.Fill(ds, "fa");
chkFruit_animal.DataSource = ds.Tables["fa"];
chkFruit_animal.DataTextField = "faName";
chkFruit_animal.DataValueField = "faID";
chkFruit_animal.DataBind();
}
}
Database:
[fa]
faID|faname
1 |Fruit
2 |Animals
[teamName]
faID|Tname
1 |Bananas
1 |Apple
2 |Dog
2 |Cat
2 |Monkeys

Answer 1

Update code
Front End:
<div>
<div>
<asp:CheckBoxList ID="chkFruit_Animal" runat="server" OnCheckedChanged="chkFruit_Animal_CheckedChanged" ></asp:CheckBoxList>
</div>
<asp:CheckBoxList ID="chkBind" runat="server"></asp:CheckBoxList>
</div>
Code Behined
protected void Page_Load(object sender, EventArgs e)
{
//Console.WriteLine(json);
if (!IsPostBack)
{
//get the data from database
DataTable dtFruitAnimal = new DataTable("Name");
dtFruitAnimal.Columns.Add("faID");
dtFruitAnimal.Columns.Add("faname");
dtFruitAnimal.Rows.Add("1","Fruit");
dtFruitAnimal.Rows.Add("2","Animals");
chkFruit_Animal.DataSource = dtFruitAnimal;
chkFruit_Animal.DataTextField = "faID";
chkFruit_Animal.DataValueField = "faname";
chkFruit_Animal.DataBind();
}
}
protected void chkFruit_Animal_CheckedChanged(object sender, EventArgs e)
{
string value = chkFruit_Animal.SelectedValue;
DataTable dtResult = GetData(value);
chkBind.DataSource = dtResult;
chkBind.DataTextField = "faID";
chkBind.DataValueField = "Tname";
chkBind.DataBind();
}
public DataTable GetData(string strValue)
{
DataTable dt = new DataTable("DtResult");
string sqlQuery = "SELECT DISTINCT * From teamName where faId=#value";
using (SqlConnection con = new SqlConnection(WebConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString))
{
using (SqlDataAdapter da = new SqlDataAdapter(sqlQuery, con))
{
da.SelectCommand.CommandType = CommandType.Text;
da.SelectCommand.Parameters.AddWithValue("#value", strValue);
da.Fill(dt);
}
}
return dt;
}