如何将 json 字符串传递给 webmethod c# ASP.NET

Question

我试图对一个 javascript 对象进行字符串化，然后将该字符串作为参数传递给代码隐藏中的 WebMethod。 我无法让它工作，因为我收到 500 的内部服务器错误，并且堆栈跟踪显示参数值丢失。

这是javascript代码：

var jSon = JSON.stringify(javascriptObject); 
// "{"Foretagsnamn":"Avector","BGFarg":"000000","TextColor":"fafafa","FooterFarg":"ffffff","FooterColor":"000000","FooterLinkColor":"050505","FeaturedBorderColor":"","HoverFarg":"12ebeb","RutFarg":"0d0d0d","SelectedRutFarg":"","RutColor":"FFFFFF","LankColor":"","DelaMedSig":"1","PersonalSida":"0","StartpageTitle":"","StartpageDescription":"","GoogleMaps":"<iframe width=\"425\" height=\"350\" frameborder=\"0\" scrolling=\"no\" marginheight=\"0\" marginwidth=\"0\" src=\"https://maps.google.se/maps?f=q&amp;source=embed&amp;hl=sv&amp;geocode=&amp;q=Avector AB&amp;aq=&amp;sll=56.225986,12.870827&amp;sspn=0.076248,0.154324&amp;ie=UTF8&amp;hq=Avector AB&amp;hnear=&amp;t=m&amp;cid=645910733081021950&amp;iwloc=A&amp;ll=56.224594,12.859229&amp;spn=0,0&amp;output=embed\"></iframe><br /><small><a href=\"https://maps.google.se/maps?f=q&amp;source=embed&amp;hl=sv&amp;geocode=&amp;q=Avector AB&amp;aq=&amp;sll=56.225986,12.870827&amp;sspn=0.076248,0.154324&amp;ie=UTF8&amp;hq=Avector AB&amp;hnear=&amp;t=m&amp;cid=645910733081021950&amp;iwloc=A&amp;ll=56.224594,12.859229&amp;spn=0,0\" style=\"text-align:left\">Visa större karta</a></small>","HittaKartaUrl":"http://www.hitta.se/avector ab/ängelholm/hxTP-4v1HG?vad=Avector AB","EniroKartaUrl":"http://kartor.eniro.se/m/aKkhi","Ikoner":"2","Email":"info@avector.com","AdressSida":"1","shadowColor":"ffffff","lineColor":"2b292b","MenuHoverIcon":"Välj bild från server","fontFamily":"Verdana","supportText":"Support Avector","captcha":true,"metaKeywords":"","ShowSupportInFooter":true}"

$.ajax({
    type: "POST",
    url: "Post/Installningar.aspx/Updatera",
    data: jSon,
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function (result) {

        var resultAsString = result.d;
        //_this.parent().siblings('.SavedStatus').html(resultAsString);

        if (resultAsString == "1") { // Gick bra att spara.
           alert("Uppgifterna är sparade.");
           document.location = document.location;
        }
        else {
           $('#StatusText').html("Gick inte att spara uppgifterna.");
        }


    },
    error: function (xhr, ajaxOptions, thrownError) {

    }
});

这是网络方法：

[WebMethod]
public static string Updatera(string jSon)
{

感觉就像我已经尝试了通过谷歌和这里搜索时找到的所有东西。

我也试过很多人参考的这个指南： http : //encosia.com/using-jquery-to-directly-call-aspnet-ajax-page-methods/

有任何想法吗？

Answer 1

首先，您需要使用：

var jSon = JSON.stringify({obj:javascriptObject});

代替：

var jSon = JSON.stringify(javascriptObject);

那么你的WebMethod会是这样的：

[WebMethod]
public static string Updatera(aData obj)
{
    // logic code 
}

现在这里aData是你的类，如下所示：

public class aData { 
    public string Foretagsnamn  { get; set; }
    public string BGFarg  { get; set; }
    public string TextColor  { get; set; }
    public string FooterFarg  { get; set; }
    public string Email  { get; set; }
}

---

所以你的最终代码看起来像jQuery：

var jSon = JSON.stringify({ obj:javascriptObject });
$.ajax({
    type: "POST",
    url: "Post/Installningar.aspx/Updatera",
    data: jsonData,
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: OnSuccess,
    error: OnErrorCall
});

function OnSuccess(response){
    // Do something
}
function OnErrorCall(){
    // Do something
}

背后的代码：

public class aData { 
    public string Foretagsnamn { get; set; }
    public string BGFarg { get; set; }
    public string TextColor { get; set; }
    public string FooterFarg { get; set; }
    public string Email { get; set; }
}


[WebMethod]
public static string Updatera(aData obj)
{
    // Logic code
}

Answer 2

将这种格式用于 ajax 帖子格式：

var jSon = JSON.stringify(javascriptObject);

你的 Json 格式将是这样的：'{name: "' + name +'" }',

function ShowCurrentTime() {
    $.ajax({
        type: "POST",
        url: "Installningar.aspx/Updatera",
        data: jSon; 
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: OnSuccess,
        failure: function(response) {
            alert(response.d);
        }
    });
}
function OnSuccess(response) {
    alert(response.d);
}

按照此步骤完整运行您的代码： http : //www.aspsnippets.com/Articles/Calling-ASPNet-WebMethod-using-jQuery-AJAX.aspx