小编Phi*_*lip的帖子

我试图用libcurl从C++的REST网页下载一个json文件.如果我去网页但以下代码有效但如果我尝试访问json则不下载....

我认为它应该是一个简单的解决方案,但我找不到任何参考...

如果我去网页打开json,但这段代码只返回text/html; 字符集= utf-8的

??????????

CURL *curl;
CURLcode res;
    struct curl_slist *headers=NULL; // init to NULL is important 
    headers = curl_slist_append(headers, "Accept: application/json");   

curl = curl_easy_init();
if(curl) {

    curl_easy_setopt(curl, CURLOPT_URL, "http://web.com/api/json/123");
            curl_easy_setopt(curl, CURLOPT_HTTPGET,1);
    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
    //curl_easy_setopt(curl, CURLOPT_URL, "http://web.com/123.html");//this works!!!
    res = curl_easy_perform(curl);

    if(CURLE_OK == res) {
        char *ct;
        /* ask for the content-type */
        res = curl_easy_getinfo(curl, CURLINFO_CONTENT_TYPE, &ct);
        if((CURLE_OK == res) && ct)
            printf("We received Content-Type: %s\n", ct);
    }
}
/* always cleanup */ 
curl_easy_cleanup(curl);

事件查看器显示以下错误

工作进程无法预加载 .Net 运行时版本无托管代码。

工作进程未能正确初始化，因此无法启动。数据是错误的。

我可以dotnet website.dll从命令行运行并在 Web 浏览器中查看它，但由于某种原因 IIS 不运行 asp.net core 网站。

我已经从这里安装了 Windows 托管 dotnet core 以及 sdk

https://github.com/dotnet/core/blob/master/release-notes/download-archives/

我已将 .net clr 版本设置为“无托管代码”。

我将身份更改为管理员以消除潜在的权限问题

Enable-WindowsOptionalFeature -Online -FeatureName IIS-WebServerRole
Enable-WindowsOptionalFeature -Online -FeatureName IIS-WebServer
Enable-WindowsOptionalFeature -Online -FeatureName IIS-CommonHttpFeatures
Enable-WindowsOptionalFeature -Online -FeatureName IIS-HttpErrors
Enable-WindowsOptionalFeature -Online -FeatureName IIS-HttpRedirect
Enable-WindowsOptionalFeature -Online -FeatureName IIS-ApplicationDevelopment
Enable-WindowsOptionalFeature -Online -FeatureName NetFx4Extended-ASPNET45
Enable-WindowsOptionalFeature -Online -FeatureName IIS-HealthAndDiagnostics
Enable-WindowsOptionalFeature -Online -FeatureName IIS-HttpLogging
Enable-WindowsOptionalFeature -Online -FeatureName IIS-LoggingLibraries
Enable-WindowsOptionalFeature -Online -FeatureName IIS-RequestMonitor
Enable-WindowsOptionalFeature -Online -FeatureName IIS-HttpTracing
Enable-WindowsOptionalFeature -Online -FeatureName …

我试图将以下SQL转换为LINQ表达式

SELECT    COUNT(ID) AS Count, MyCode
FROM      dbo.Archive
WHERE     DateSent>=@DateStartMonth AND DateSent<=@DateEndMonth
GROUP BY  MyCode

我一直在尝试关注此网页作为示例:
将包含top,count,group和order的SQL转换为LINQ(2个实体)

到目前为止,我得到了这个,但我仍然坚持理解新的部分

var res = (from p in db.Archives
           where (p.DateSent>= dateStartMonth) && (p.DateSent< dateToday)
           group p by p.MyCode into g
           select new { ??????MyCode = g.something?, MonthlyCount= g.Count() });

在此先感谢您的帮助

更新:
你能解释一下g.Key是什么吗？我不明白那个变量来自哪里或它是指什么？我的意思是如果我分组4个不同的东西？我如何参考每一个？

var res = from archive in db.Archives
      where archive.DateSent >= dateStartMonth &&
            archive.DateSent < dateToday
      group archive by archive.MyCode, archive.Extra into archiveGrp
      select new 
      { 
           MyCode = archiveGrp.Key, 
           Extra = archiveGrp.??? …