第 16 章 crifanLib.cs之JSON

16.1. JSON字符串转换为字典变量:jsonToDict

16.1. JSON字符串转换为字典变量:jsonToDict

#if USE_JSON
    /*
     * [Function]
     * convert json string into dictionary object
     * [Input]
     * json string
     * [Output]
     * object, internally is dictionary
     * [Note]
     * 1.you should know the internal structure of the dictionary
     * then converted to specific type of yours
     */
    public Object jsonToDict(string jsonStr)
    {
        JavaScriptSerializer jsonSerializer = new JavaScriptSerializer() { MaxJsonLength = int.MaxValue };
        Object dictObj = jsonSerializer.DeserializeObject(jsonStr);

        return dictObj;
    }
#endif

例 16.1. jsonToDict 的使用范例

        string kibMasJson = "";
        string colorImagesJson = "";

        if (crl.extractSingleStr(@"window\.kibMAs\s*=\s*(\[.+?\])\s*;\s*window\.kibConfig\s*=", productHtml, out kibMasJson, RegexOptions.Singleline))
        {
            //2. json to dict
            Object[] dictList = (Object[])crl.jsonToDict(kibMasJson);

            //3. get ["preplayImages"]["L"]
            imageUrlList = new string[dictList.Length];
            crl.emptyStringArray(imageUrlList);

            for (int idx = 0; idx < dictList.Length; idx++)
            {
                Dictionary<string, Object> eachImgDict = (Dictionary<string, Object>)dictList[idx];
                Object imgUrlObj = null;
                if (eachImgDict.ContainsKey("preplayImages"))
                {
                    eachImgDict.TryGetValue("preplayImages", out imgUrlObj);
                }
                else if (eachImgDict.ContainsKey("imageUrls"))
                {
                    eachImgDict.TryGetValue("imageUrls", out imgUrlObj);
                }

                if (imgUrlObj != null)
                {
                    //"L" : "http://g-ecx.images-amazon.com/images/G/01/kindle/dp/2012/KC/KC-slate-01-lg._V401028090_.jpg", 
                    //"S" : "http://g-ecx.images-amazon.com/images/G/01/kindle/dp/2012/KC/KC-slate-01-sm._V401028090_.jpg"

                    //"L" : "http://g-ecx.images-amazon.com/images/G/01/kindle/dp/2012/KC/KC-slate-03-lg._V400694812_.jpg",
                    //"S" : "http://g-ecx.images-amazon.com/images/G/01/kindle/dp/2012/KC/KC-slate-03-sm._V400694812_.jpg",
                    //"rich": {
                    //    src: "http://g-ecx.images-amazon.com/images/G/01/misc/untranslatable-image-id.jpg",
                    //    width: null,
                    //    height: null
                    //}

                    //Type curType = imgUrlObj.GetType();
                    Dictionary<string, Object> imgUrlDict = (Dictionary<string, Object>)imgUrlObj;
                    Object largeImgUrObj = "";
                    if (imgUrlDict.TryGetValue("L", out largeImgUrObj))
                    {
                        //[0]	"http://g-ecx.images-amazon.com/images/G/01/kindle/dp/2012/KT/KT-slate-01-lg._V395919237_.jpg"
                        //[1]	"http://g-ecx.images-amazon.com/images/G/01/kindle/dp/2012/KT/KT-slate-02-lg._V389394532_.jpg"
                        //[2]	"http://g-ecx.images-amazon.com/images/G/01/kindle/dp/2012/KT/KT-slate-03-lg._V389394535_.jpg"
                        //[3]	"http://g-ecx.images-amazon.com/images/G/01//kindle/dp/2012/KT/KT-slate-04-lg.jpg"
                        //[4]	"http://g-ecx.images-amazon.com/images/G/01/kindle/dp/2012/KT/KT-slate-05-lg._V389394532_.jpg"
                        imageUrlList[idx] = largeImgUrObj.ToString();
                    }
                    else
                    {
                        //something wrong
                        //not get all pic
                    }
                }
                else
                {
                    //something wrong
                }
            }
        }


15.5. 导出DataGridView内容到CSV文件:dgvExportToCsv		参考书目