如何使用Json结果？ [英] How to consume Json result?

问题描述

在VS2012中使用VB并且对Json来说是全新的。在没有找到我需要的帮助的情况下阅读了很多帖子。

我想将Json字符串读入数据集。我认为我的主要问题是字符串中有子集。对于不同的客户，Json字符串也是动态的，不同的结果（虽然结构相同）。

更喜欢在基本的VB中工作，而不是使用第三方库。

Hi,
Using VB in VS2012 and completely new to Json. Have been reading a lot of posts without finding the help I need.
I would like to read Json string below into dataset(s). I think my major problem is there are subsets within the string. The Json string is also dynamic, different results (same structure though) for different customers.
Would prefer to work in basic VB, not using third party libraries.

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推荐答案

There are many libraries for parsing JSON. I would suggest using them. There is no need to avoid 3rd Party utilities. I use Newtonsoft.Json because it came with SignalR. It is available via NuGet.



The only alternative it to parse the string yourself. To do this, I suggest you create a class that specifically deals with your Json format and deserializes the string.







UPDATE:

Newtonsoft.Json:



Here is how to use it:



Create a class for your objects in the array. Match parameter names and types with the variable names in your Json.

Create another class that has an array of the first class called \"values\".



Then:

There are many libraries for parsing JSON. I would suggest using them. There is no need to avoid 3rd Party utilities. I use Newtonsoft.Json because it came with SignalR. It is available via NuGet.

The only alternative it to parse the string yourself. To do this, I suggest you create a class that specifically deals with your Json format and deserializes the string.



UPDATE:
Newtonsoft.Json:

Here is how to use it:

Create a class for your objects in the array. Match parameter names and types with the variable names in your Json.
Create another class that has an array of the first class called "values".

Then:

Dim argPoco as MyClass = JsonConvert.DeserializeObject<MyClass>(Json.ToString());

My VB is a little rusty btw ^_^

My VB is a little rusty btw ^_^

Hi


I created Json as below. it is working.





using Newtonsoft.Json;





public driverDetailsBO getDriverDetails(driverDetailsBO objDriverDetailsBO)

{

string fileLocationpath = @\"Cache\DriverDetails\DriverDetails_01.json\";

string fileLocation = FileLocation(fileLocationpath);

string jsonText = fnReadJson(fileLocation);

driverDetailsBO objdrive = null;

if (jsonText == string.Empty)

{

jsonText = JsonConvert.SerializeObject(objDriverDetailsBO, Formatting.Indented);

jsonText = jsonText.Replace(\"\r\n\", \"\");

fnCreateFile(jsonText, fileLocation);

}

else

{

objdrive =JsonConvert.DeserializeObject<driverdetailsbo>(jsonTe xt);

}

return objdrive;

}

Hi
I created Json as below. it is working.


using Newtonsoft.Json;


public driverDetailsBO getDriverDetails(driverDetailsBO objDriverDetailsBO)
{
string fileLocationpath = @"Cache\DriverDetails\DriverDetails_01.json";
string fileLocation = FileLocation(fileLocationpath);
string jsonText = fnReadJson(fileLocation);
driverDetailsBO objdrive = null;
if (jsonText == string.Empty)
{
jsonText = JsonConvert.SerializeObject(objDriverDetailsBO, Formatting.Indented);
jsonText = jsonText.Replace("\r\n", "");
fnCreateFile(jsonText, fileLocation);
}
else
{
objdrive =JsonConvert.DeserializeObject<driverdetailsbo>(jsonText);
}
return objdrive;
}

private static string FileLocation(string fileLocation)
      {
          string path = "";
          int stindex = 0;
          int endindex = 0;
          path = System.IO.Path.GetDirectoryName(
              System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase);
          stindex = path.IndexOf("\\") + 1;
          endindex = path.IndexOf("bin");
          path = path.Substring(stindex, (endindex - stindex));
          fileLocation = path + fileLocation;
          return fileLocation;
      }

  public String fnReadJson(String fileLocation)
       {
           String jsonText = string.Empty;
           try
           {
               if (File.Exists(fileLocation))
               {
                   using (TextReader textReader = new StreamReader(fileLocation))
                   {
                       jsonText = textReader.ReadLine().ToString();
                   }
               }
           }
           catch { }
           return jsonText;
       }

这篇关于如何使用Json结果？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！