Jquery Ajax Call总是返回错误

我有一个javascript代码如下

var xReg = '' + $("#txtWidth").val() + ' ' + $("#txtHeight").val() + '' + $("#floats").val() + '' + $("#contenttype").val() + '' + rgnStyle + ''; $.ajax({ type: "POST", url: "myurl/addRegion", data: "{pubId: '" + Number($("#pubs").val()) + "',section: '" + $("#sections option:selected").text() + "',layoutW: '" + Number($("#txtLayoutW").val()) + "',layoutH: '" + Number($("#txtLayoutH").val()) + "',bSubReg: '" + Boolean($("#chkSubRegion").is(':checked')) + "',parentRegId: '" + Number(parentRgn) + "',sXmlRegion: '" + xReg.toString() + "'}", contentType: "application/json; charset=utf-8", async: false, dataType: "json", success: function (result) { document.body.style.cursor = 'pointer'; if (result.d == -1) { $("#errMsg").text("Failed to create new region"); } else { if ($("#chkSubRegion").is(':checked')) { $("#regions").append("REGION-" + result.d.toString() + ""); } else { $("#subregions").append("SUBREGION-" + result.d.toString() + ""); } } }, error: function (result) { if (result.status == 200 && result.statusText == 'OK') { if ($("#chkSubRegion").is(':checked')) { $("#regions").append("REGION-" + result.d.toString() + ""); } else { $("#subregions").append("SUBREGION-" + result.d.toString() + ""); } } else { alert("FAILED : " + result.status + ' ' + result.statusText); } }, async: true }); 

服务器代码如下

 [WebMethod] public int addRegion(int pubId, string section, int layoutW, int layoutH, bool bSubReg, int parentRegId, string sXmlRegion) { string path = Server.MapPath("~"); path = Path.Combine(path, "Published"); path = Path.Combine(path, pubId.ToString()); path = Path.Combine(path, section); XmlDocument doc = new XmlDocument(); int rgnCount = 0; try { if (!Directory.Exists(path)) { Directory.CreateDirectory(path); } path = Path.Combine(path, "layout.xml"); if (!File.Exists(path)) { XmlNode docNode = doc.CreateXmlDeclaration("1.0", "UTF-8", null); doc.AppendChild(docNode); XmlNode templateNode = doc.CreateElement("layout"); doc.AppendChild(templateNode); XmlNode xNodeW = doc.CreateElement("width"); xNodeW.AppendChild(doc.CreateTextNode(layoutW.ToString())); XmlNode xNodeH = doc.CreateElement("height"); xNodeH.AppendChild(doc.CreateTextNode(layoutH.ToString())); } else { doc.Load(path); doc.DocumentElement.SelectSingleNode("/layout/width").InnerText = layoutW.ToString(); doc.DocumentElement.SelectSingleNode("/layout/height").InnerText = layoutH.ToString(); } XmlElement root = doc.DocumentElement; XmlNode xParent = root; if (bSubReg) { xParent = root.SelectSingleNode("/layout/region[id='" + parentRegId.ToString() + "']"); rgnCount = xParent.SelectNodes("/region").Count; } else { rgnCount = root.SelectNodes("/Layout/region").Count; } rgnCount++; XmlDocumentFragment docFragment = doc.CreateDocumentFragment(); docFragment.InnerXml = sXmlRegion; XmlNode xID = doc.CreateElement("id"); xID.AppendChild(doc.CreateTextNode(rgnCount.ToString())); docFragment.FirstChild.AppendChild(xID); xParent.AppendChild(docFragment); doc.Save(path); return rgnCount; } catch (Exception eX) { return -1; } } 

该呼叫将从客户端转到服务器。 在我调试它时，我在服务器代码中找到的问题直到最后一个return语句。 在javascript调试中我发现ajax调用后总是会出现错误回调函数。 任何人都可以建议代码有什么问题。

谢谢，感谢您的时间。

Answer 1

我发现我的代码中的错误存在以下代码行的问题

  }, async: true 

在错误结束时：回调函数

我删除了行async：true并且它有效