Convert MWCharArray to MWStructArray

Question

Said Labreche 2022-4-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1706480-convert-mwchararray-to-mwstructarray

回答： SOUMNATH PAUL 2023-11-10

Bonjour,

I have created a function in a Matlab DLL. I use this function, in C#, to create an output "Result" as MWArray. In C#, I transform easely "Result" to an an MWStructArray by MWStructArray Results_Bis = (MWStructArray)Result; this transformation works

Now, I modify my function. The output is not "Result" but "Result_JSon" an MWCharArray obtained by

Result_JSon = jsonencode(Result)

I try diffferent ways without success to create a same MWStructArray by using the new result "Result_JSon"

Can you please, help me ?

Thank you in advance

Best regards

Saïd Labrèche

sorry for my bad English

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

SOUMNATH PAUL 2023-11-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1706480-convert-mwchararray-to-mwstructarray#answer_1350465

在 MATLAB Online 中打开

Hi,

To my understanding, you initially had a MATLAB DLL function providing an MWArray output named “Result” convertible to MWStructArray in C#. The function was later modified to yield “Result_JSon”, an MWCharArray which you obtained through JSON encoding. You want to convert the MWCharArray back into MWStructArray format in C#.

You can follow below mentioned steps for the proper conversion:

Update MATLAB Function: Make sure your MATLAB function now generates a JSON string(‘Result_JSon’) using the ‘jsonencode’ function.
Install Newtonsoft.Json: In your C# project, install the Newtonsoft.Json library using Nuget Package Manager.
De-serialize JSON String: Deserialize the JSON string(‘Result_JSon’) into a C# object using a nifty tool from Newtonsoft.Json.
Convert to MWStructArray: Create a function to convert fields of the C# object to correct MWArray types and field names.

using MathWorks.MATLAB.NET.Arrays; 
using Newtonsoft.Json; 
 
MWArray Result; 
MWCharArray Result_JSon = (MWCharArray)yourMatlabFunctionCall(); 
 
// Step 1: Convert MWCharArray to C# string 
string jsonString = Result_JSon.ToString(); 
 
// Step 2: Deserialize JSON string into C# object 
YourCSharpObjectType resultObject = JsonConvert.DeserializeObject<YourCSharpObjectType>(jsonString); 
 
// Step 3: Convert C# object to MWStructArray 
MWStructArray Results_Bis = ConvertToMWStructArray(resultObject); 
 
// Your ConvertToMWStructArray function 
MWStructArray ConvertToMWStructArray(YourCSharpObjectType resultObject) 
{ 
    // Create a new MWStructArray 
    MWStructArray mwStructArray = new MWStructArray(1, 1); 
 
    // Customize the following based on your actual field names 
    // For each field, convert the C# value to the appropriate MWArray type 
    mwStructArray["FieldName1"] = new MWNumericArray(resultObject.Field1); 
    mwStructArray["FieldName2"] = new MWCharArray(resultObject.Field2); 
    // ... 
 
    return mwStructArray; 
} 