在ajax中传递多个参数给我错误

Question

我想将多个参数传递给我的ajax 代码。这是3 参数。所以，我在下面添加了

$(document).ready(function () {
        SearchText();
    });
    function SearchText() {
        $("#txt712").autocomplete({
            source: function (request, response) {
                $.ajax({
                    type: "POST",
                    contentType: "application/json; charset=utf-8",
                    url: "FrmAgreementMaster.aspx/GetAutoCompleteData",
                    //data: "{'username':'" + extractLast(request.term) + "'}",
                    data: JSON.stringify("{'username':'" + extractLast(request.term) + "'}", "{'taluka':'" + document.getElementById('ddlTaluka').value + "'}", "{'village':'" + document.getElementById('ddlVillage').value + "'}"),
                    dataType: "json",
                    success: function (data) {
                        response(data.d);
                    },
                    error: function (result) {
                        alert("Error");
                    }
                });
            },
            focus: function () {
                return false;
            },
            select: function (event, ui) {
                var terms = split(this.value);
                terms.pop();
                terms.push(ui.item.value);
                terms.push("");
                this.value = terms.join(", ");
                return false;
            }
        });
        $("#txt712").bind("keydown", function (event) {
            if (event.keyCode === $.ui.keyCode.TAB &&
                $(this).data("autocomplete").menu.active) {
                event.preventDefault();
            }
        })
        function split(val) {
            return val.split(/,\s*/);
        }
        function extractLast(term) {
            return split(term).pop();
        }
    }

参考HERE 的Darin's 代码。

但在调用该函数时，它会将我带到ERROR 部分。如何传递多个参数来使用它。

更新

另外，我从here获取了ajax引用

响应码：-

[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
[WebMethod]
public static List<string> GetAutoCompleteData(string username, string taluka, string village)
{
    List<string> result = new List<string>();
    using (OracleConnection ObjPriCon = new OracleConnection(System.Configuration.ConfigurationManager.ConnectionStrings["OracleConn"].ToString()))
    {

        using (OracleCommand cmd = new OracleCommand("select distinct survey_area_7_12 FROM xxcus.xxacl_pn_farming_mst WHERE survey_area_7_12  " +
                                                     "LIKE '%' || :searchtext || '%' and taluka = '" + taluka + "' and village = '" + village + "'", ObjPriCon))
        {
            ObjPriCon.Open();
            cmd.Parameters.AddWithValue(":searchtext", username.ToLower());
            OracleDataReader dr = cmd.ExecuteReader();
            if (dr.HasRows)
            {
                while (dr.Read())
                {
                    result.Add(dr["survey_area_7_12"].ToString());
                }
            }
            return result;
        }
    }
}

Answer 1

您可以传递多个参数，例如：

$.ajax({
...
data: {
    var1: val1,
    var2: val2,
    var3: val3,
    var4: val4,
    // and many more
}
...
});

如果你想传递一个数组，你可以使用'JSON.stringify'。

Answer 2

你不需要多个对象，你需要一个对象中有多个属性

 data: JSON.stringify({username: extractLast(request.term) , taluka: $('#ddlTaluka').val(), village:$('#ddlVillage').val()}),

Ps：不要忘记在页面准备好时触发自动完成，确保这些输入中有值

Answer 3

尝试像这样传递数据：

data: JSON.stringify([
    {username: extractLast(request.term)},
    {taluka: document.getElementById('ddlTaluka').value},
    {village: document.getElementById('ddlVillage').value}
]),

或者像这样：

data: {
    username: extractLast(request.term),
    taluka: document.getElementById('ddlTaluka').value,
    village: document.getElementById('ddlVillage').value
},

Answer 4

最简单的方法是将包含数据键值对的对象分配给 ajax 调用的 data 属性。

$.ajax({
   type: 'POST',
   url: url,
   data: {
      'name': $('#name').val(),
      'email': $('#email').val(),
      // so on...
   }
})

然后您可以通过您在此处指定的名称在您的发布请求中简单地获取它们。

Answer 5

请尝试这样做。

 $.ajax({
                type: "POST",
                contentType: "application/json; charset=utf-8",
                url: "FrmAgreementMaster.aspx/GetAutoCompleteData",
                //data: "{'username':'" + extractLast(request.term) + "'}",

        data: JSON.stringify({
            username: extractLast(request.term),taluka:document.getElementById('ddlTaluka').value,village:document.getElementById('ddlVillage').value
        }),
                error: function (result) {
                    alert("Error");
                }
            });