从Ajax方法返回字符串结果 [英] Returning String Result from Ajax Method

问题描述

我有一个DoughnutChart图表，我想更改其部分颜色与数据库中保存的颜色hexa代码我使用此Ajax方法通过调用返回JSON结果的操作方法来获取颜色字符串，

I have a DoughnutChart chart and I would like to change the color of its parts regarding color hexa-codes saved in the database I used this Ajax method to get the color string by invoking an action method that returns JSON Result ,

    getcolors: function getcolors(name) {
    return $.ajax({
        url: "/api/ideas/getcolors",
        data: { name: name },
        type: "GET",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (data, textStatus, jqXHR) {
           // return  data;
        },
        error: function (data) {
          // return  "Failed";
        },
        async: true
    });

但不是接收字符串我在控制台窗口中收到了对象{readyState：1}

but instead of receiving the string I received Object {readyState: 1} in the console window

但是，我可以找到存储在ResponseText元素中的颜色值。我需要你的帮助我如何获得颜色值字符串。

However, I can find the color value stored in ResponseText element.I need your help in how can I get the color value as string.

编辑：

为了让事情更清楚，我会在哪里喜欢调用ajax方法来接收颜色字符串然后我就可以推入图表颜色数组了。

To make things more clear that's where I would like to invoke the ajax method to receive the color string then I will be able to push in the chart color array .

getColorArray: function getColorArray(categories) {
        var colors = [];
        for (var i = 0; i < categories.length; i++) {
            console.log(this.getcolors("Risk"));
            //colors.push(this.getcolors(categories[i]));
        }

        return colors;
    }

推荐答案

为什么你的代码是这样的？

Why your code is like this?

success: function (data, textStatus, jqXHR) { 
   // return  data;
},

你用过吗？

success: function (data, textStatus, jqXHR) {
   console.log(data);
}

好的，我明白了。当您使用ajax请求时，您将使用异步数据，为此，您需要在方法中返回一个promise。请尝试使用以下代码。

Ok, i got it. When you use an ajax request your will work with asynchronous data, to do this you need return a promise in your method. Please, try to use the code below.

getcolors: function getcolors(name) {
    return $.ajax({
       url: "/api/ideas/getcolors",
       data: { name: name },
       type: "GET",
       contentType: "application/json; charset=utf-8",
       dataType: "json",
    });
}

使用此功能时使用此代码：

And for use your function use this code:

getcolors("name").done(function(result){
    console.log(result);
});

或者你可以使用回调

getcolors: function getcolors(name, success, error) {
    return $.ajax({
       url: "/api/ideas/getcolors",
       data: { name: name },
       type: "GET",
       contentType: "application/json; charset=utf-8",
       dataType: "json",
       success: function(data){
           success(data);
       },
       error: function(data){
           error(data);
       }
    });
}

...以及与回调一起使用：

... And for use with callbacks:

getcolors("name", function(data){
    //success function
    console.log(data);
}, function(){
    //Error function
    console.log(data);
})

尝试其中一个选项并告知结果。

Try one of this options and tell the result.

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