Using the AJAX binding drop-down list

Binding Course Information

function Changeddl () {

$.ajax ({

Type: "Post",

URL: "Changezsdhandler.ashx",

Data: "Username=" + $.trim ($ ("#hidUserName"). Val ()),

DataType: "Text",

Success:function (data) {

if (Data! = "") {

$ ("#ddlKc"). Append (data);

}

}

});

}

<select id= "DDLKC" >

</select>

Code in AJAX

if (context. request["username"]! = NULL)

{

Username = context. request["username"]. ToString ();

DataTable dt = Kmbll. BINDKC (username);

StringBuilder Sboptione = new StringBuilder ();

Sboptione.append ("<option value= ' 0 ' > = = = Please select the course ¨¬=== </option>");

if (dt! = NULL)

{

if (dt. Rows.Count > 0)

{

foreach (DataRow dr in Dt. Rows)

{

Sboptione.append ("<option value=\" "+ dr[" Kmid "] +" \ ">" + dr["kmname"] + "</option>");

}

}

}

Context. Response.Write (Sboptione.tostring ());

}

Else

{

Context. Response.Write ("");

}

Context. Response.End ();

Using the AJAX binding drop-down list