asp.net-求教為何接收不到參數。。

求教為何接收不到參數。。

else {
$.ajax({
type: "POST",
url: "addXZYW.aspx/SetBaoCun",
//data: {id: id, mc: mc, mc: mc,engname: engname,shuruma: shuruma,tym: tym},

data: "{id:'" + id + "',mc:'" + mc + "',engname:'" + engname + "',shuruma:'" + shuruma + "',tym:'" + tym + "'}",
contentType: "application/json; charset=utf-8",
dataType: "json",
async: false,
error: function (XMLHttpRequest, textStatus, errorThrown) { },
success: function (data) { }
});
};

                            這樣後台怎麼收不到數據呢？
                            後台：
                            [System.Web.Services.WebMethod]
    public void SetBaoCun(string id, string mc, string engname, string shuruma,string tym)
         {
             //string id1 = id; string mc1 = mc; string engname1 = engname; string shuruma1 = shuruma; string tym1 = tym;
             string sql = string.Format(@"insert into zsk_yaopin(id,name,engname,shuruma1,commonname) values({0},{1},{2},{3},{4})", id, mc, engname, shuruma, tym);
              DbAccess.ExecuteNonQuery(DbAccess.m, CommandType.Text, sql);   


         }

最佳回答：

參數這樣傳：

 data: {
                id: id ,
                mc:mc,
                engname:engname,
                shuruma:shuruma,
                tym:tym
            }

後台可以這樣：方法名（FormCollection formInfos）{
tring id = formInfos["id"].Trim();//以此類推
}