Javascript 已售出状态：，owner.IsSold，已存取值：，owner.AccessedVal， “土地价值：”，owner.LandVal，“附加价值：”，owner.AdditionalVal， “税率：”，owner.TaxRate，“年税率：”，owner

已售出状态：，owner.IsSold，
已存取值：，owner.AccessedVal， “
土地价值：”，owner.LandVal，“
附加价值：”，owner.AdditionalVal， “
税率：”，owner.TaxRate，“
年税率：”，owner.TaxPerYear， 房地产税：“（业主、房地产税）； }).加入（“”）； $（“#display”）.html（html）； },

---

调试步骤1-

console.log（数据）

-这是您所期望的吗？我的阵列是空的？0井的长度。。。接下来就是

objDB.GetDataSet（strSQL，out count）

不会产生任何数据，如果请求返回一个数组，则表明您没有正确使用它。您是否在浏览器控制台中查找了错误？应该有几个，因为没有数据-问题可能在服务器端有实际数据，因为当我通过url运行它时，数据会显示出来。所以我知道它在起作用。我只是不知道为什么它没有显示它仍然让我没有定义，但现在我的控制台显示了实际的数据它是一个数组-让我充实一下answer@Phil-我在评论中这样做了-现在充实答案

$("#btnGetTaxByBL").click(function () {
            var strURL = "https://localhost:44395/api/ServiceDeed/GetByBlockNLot/" + blockNo + "/" + lotNo;

            $("#display").html("");
            $("#msg").html("");
            $("#update").html("");
            $("#updateResult").html("");

            console.log("btnGetTaxByBL clicked");

            var blockNo = $("#txtBlockNo").val();
            var lotNo = $("#txtLotNo").val();

            $.ajax({
                type: "GET",
                url: strURL,
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (data) {
                    var owner = data;

                    $("#display").html("<hr><p>".concat("HomeOwnerID: ", owner.HomeOwnerID,
                        "<br>FirstName: ", owner.FirstName, "<br>LastName: ", owner.LastName,
                        "<br>Address: ", owner.Address, "<br>City: ", owner.City,
                        "<br>State: ", owner.State, "<br>ZipCode: ", owner.ZipCode,
                        "<br>Telephone Number: ", owner.TelNo, "<br>Email: ", owner.Email,
                        "<br>Block Number: ", owner.BlockNo, "<br>Lot Number: ", owner.LotNo,
                        "<br>Date of Sale: ", owner.SaleDate, "<br>Sale Price: $", owner.SalePrice,
                        "<br>Sold Status: ", owner.IsSold, "<br>Accessed Value: ", owner.AccessedVal,
                        "<br>Land Value: ", owner.LandVal, "<br>Additional Value: ", owner.AdditionalVal,
                        "<br>Tax Rate: ", owner.TaxRate, "<br>Tax Per Year: ", owner.TaxPerYear,
                        "<br>Real Estate Tax: ", owner.RealEstateTax));

                },
                error: function (req, status, error) {
                    alert("Error: " + req.responseText + " | " + status + " | " + error);
                }
            }); //end of ajax method
        }); // end of btnGetTaxByBL click event

[HttpGet("GetByBlockNLot/{block}/{lot}")]
    public List<HomeTax> GetByBlockNLot(int block, int lot)
    {
        List<HomeTax> homeTaxList = new List<HomeTax>();
        DBConnect objDB = new DBConnect();
        String strSQL = "SELECT * FROM HomeOwnership_T INNER JOIN TaxInfo_T ON HomeOwnership_T.HomeOwnerID=TaxInfo_T.HomeOwnerID WHERE BlockNo =" + block + " AND LotNo =" + lot;
        int count = 0;

        objDB.GetDataSet(strSQL, out count);

        for (int i = 0; i < count; i++)
        {
            HomeTax objOwner = new HomeTax();
            objOwner.HomeOwnerID = (int)objDB.GetField("HomeOwnerID", i);
            objOwner.FirstName = (string)objDB.GetField("FirstName", i);
            objOwner.LastName = (string)objDB.GetField("LastName", i);
            objOwner.Address = (string)objDB.GetField("Address", i);
            objOwner.City = (string)objDB.GetField("City", i);
            objOwner.State = (string)objDB.GetField("State", i);
            objOwner.ZipCode = (string)objDB.GetField("ZipCode", i);
            objOwner.TelNo = (string)objDB.GetField("TelNo", i);
            objOwner.Email = (string)objDB.GetField("Email", i);
            objOwner.BlockNo = (int)objDB.GetField("BlockNo", i);
            objOwner.LotNo = (int)objDB.GetField("LotNo", i);
            objOwner.SaleDate = (DateTime)objDB.GetField("SaleDate", i);
            objOwner.SalePrice = (Decimal)objDB.GetField("SalePrice", i);
            objOwner.IsSold = (string)objDB.GetField("IsSold", i);
            objOwner.AccessedVal = (Decimal)objDB.GetField("AccessedVal", i);
            objOwner.LandVal = (Decimal)objDB.GetField("LandVal", i);
            objOwner.AdditionalVal = (Decimal)objDB.GetField("AdditionalVal", i);
            objOwner.TaxRate = (Decimal)objDB.GetField("TaxRate", i);
            objOwner.TaxPerYear = (Decimal)objDB.GetField("TaxPerYear", i);
            objOwner.RealEstateTax = (Decimal)objDB.GetField("RealEstateTax", i);

            homeTaxList.Add(objOwner);
        }
        return homeTaxList;
    }

$("#btnGetTaxByBL").click(function () {
    var strURL = "https://localhost:44395/api/ServiceDeed/GetByBlockNLot/" + blockNo + "/" + lotNo;
    // at this point, blockNo and lotNo are "undefined
        $("#display").html("");
        $("#msg").html("");
        $("#update").html("");
        $("#updateResult").html("");

        console.log("btnGetTaxByBL clicked");

        var blockNo = $("#txtBlockNo").val();
        var lotNo = $("#txtLotNo").val();

$("#btnGetTaxByBL").click(function () {
    var blockNo = $("#txtBlockNo").val();
    var lotNo = $("#txtLotNo").val();
    var strURL = "https://localhost:44395/api/ServiceDeed/GetByBlockNLot/" + blockNo + "/" + lotNo;
    // now you are passing values rather than undefined
    $("#display").html("");
    $("#msg").html("");
    $("#update").html("");
    $("#updateResult").html("");

    console.log("btnGetTaxByBL clicked");

success: function (data) {
    var owner = data;
    $("#display").html( ... rest of your code

success: function (data) {
    var owner = data[0];
    $("#display").html( ... rest of your code

success: function (data) {
    var owner = data;
    var html = data.map(function(owner) {
        return "<hr><p>".concat("HomeOwnerID: ", owner.HomeOwnerID,
        "<br>FirstName: ", owner.FirstName, "<br>LastName: ", owner.LastName,
        "<br>Address: ", owner.Address, "<br>City: ", owner.City,
        "<br>State: ", owner.State, "<br>ZipCode: ", owner.ZipCode,
        "<br>Telephone Number: ", owner.TelNo, "<br>Email: ", owner.Email,
        "<br>Block Number: ", owner.BlockNo, "<br>Lot Number: ", owner.LotNo,
        "<br>Date of Sale: ", owner.SaleDate, "<br>Sale Price: $", owner.SalePrice,
        "<br>Sold Status: ", owner.IsSold, "<br>Accessed Value: ", owner.AccessedVal,
        "<br>Land Value: ", owner.LandVal, "<br>Additional Value: ", owner.AdditionalVal,
        "<br>Tax Rate: ", owner.TaxRate, "<br>Tax Per Year: ", owner.TaxPerYear,
        "<br>Real Estate Tax: ", owner.RealEstateTax);
    }).join('');
    $("#display").html(html);
},