jquery ajax 200 OK JSON.ParseError [英] jquery ajax 200 OK JSON.ParseError

问题描述

我有一个控件，其中有一个文本框，当其内容更改时，它将欺骗此javascript函数:

I have a control which has a textbox which, when its content changes, will tricker this javascript function:

page参数为document.URL，因为该控件没有附加的.asxc页，而fieldValue是文本框的值.

page parameter is document.URL as the control has no attached .asxc page and fieldValue is value of the textbox.

function UpdateFieldsOnListSelection(page, fieldValue) {
    $.ajax({
        type: "POST",
        url: page + "/IsSelectedListPictureLibrary",
        data: { "libraryInfo": fieldValue },
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (data) {
            alert("Success!");
        },
        error: function (jqXHR, textStatus, errorThrown) {
            alert("jqXHR: " + jqXHR.status + "\ntextStatus: " + textStatus + "\nerrorThrown: " + errorThrown);
        }
    });
};

它不断抛出此错误:

jqXHR:200
textStatus:parsererror
errorThrown:SyntaxError:JSON.parse:意外字符

jqXHR: 200
textStatus: parsererror
errorThrown: SyntaxError: JSON.parse: unexpected character

IsSelectedListPictureLibrary的代码:

[WebMethod]
public static bool IsSelectedListPictureLibrary(string libraryInfo)
{
    if (string.IsNullOrEmpty(libraryInfo)) return false;

    var common = new Utility();
    var storedLibraryInfo = common.GetStoredLibraryInfo(libraryInfo);

    if (storedLibraryInfo == null) return false;

    var web = SPContext.Current.Site.OpenWeb(storedLibraryInfo.WebId);
    var spList = web.Lists[storedLibraryInfo.LibraryId];

    if (spList.BaseTemplate == SPListTemplateType.PictureLibrary)
    {
        web.Dispose();
        return true;
    }

    web.Dispose();
    return false;
}

我尝试将ajax中的json更改为jsonp，但是发生了相同的错误.
我尝试更改data的格式.

I have tried changing json in the ajax to jsonp, but same error occured.
I tried changing the format of data.

有什么想法吗?

推荐答案

尝试从Ajax参数中删除contentType和dataType并自动识别它们

Try to remove contentType and dataType from Ajax parameters and let them be identified automatically

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