I want to pass very long string as parameter in Asp .net core web api POST method?

Question

I want to pass very long string as parameter in Asp .net core web api POST method, but when I am passing that it takes only starting few words. How to resolve this issue?

The data I'm passing:

{
"Stack":"  RtrnAddr            Arg#1             Arg#2             Arg#3             Arg#4               Function or address
  -----------------   ----------------- ----------------- ----------------- -----------------   -------------------------------------------------------------------
  00000000`378265ef0 : 00000000`00000001 00000000`38e97628 00000000`1efb5b50 00000000`00000000 
  00000000`0058000001 : 00000000`38e97628 00000000`1efb5b50 00000000`00000000 000007fe`ed12964e 
  00000000`38e987628 : 00000000`1efb5b50 00000000`00000000 000007fe`ed12964e ffffffff`fffffffe 
  00000000`1efb58b50 : 00000000`00000000 000007fe`ed12964e ffffffff`fffffffe 00000000`0028d830 
  00000000`000000000 : 000007fe`ed12964e ffffffff`fffffffe 00000000`0028d830 00000000`001e0644 
"
}

Dilrukshi Silva · Answer 1 · 2019-12-02T05:19:46.653

0

Did you add the [FromBody] attribute to the parameter in the api method?

ex: [FromBody] string value

Please see the below link. It may be useful.

https://www.codeproject.com/Tips/734080/How-to-Pass-a-Large-String-to-a-Web-API-Method-A-2

edited Dec 02 '19 at 05:19

answered Dec 02 '19 at 05:10

Dilrukshi Silva

1
4

Yes , I have Added but still in postman I am getting error with status code 415 – ashwini patil Dec 02 '19 at 05:21
Have you tried with "Content-Type": "application/json" header in postman? – Dilrukshi Silva Dec 02 '19 at 05:30
Yes , content type is ""application/json"" – ashwini patil Dec 02 '19 at 05:48
Have you tried with raw format also? Then pass data as below.{ "data" : { "test1": [ "1", "12" ], "test2": 4, "test3": 7, "test4": 1 } } – Dilrukshi Silva Dec 02 '19 at 06:18
passing in raw format , but still same issue Jason value could not be convert into system.string my post method in controller is like [HttpPost] public async TaskPost([FromBody]string Stack) { } – ashwini patil Dec 02 '19 at 06:19
[HttpPost] public async TaskPost([FromBody]string Stack) { – ashwini patil Dec 02 '19 at 06:21
There might be an issue with the way data is passed. Can you add the raw data here? – Dilrukshi Silva Dec 02 '19 at 06:39
If you are using asp.net core 3.0 then this has built-in JSON support. Try this also. [HttpPost] public async Task Post([FromBody] string Stack) { string json = System.Text.Json.JsonSerializer.Serialize(Stack); return Ok(); } – Dilrukshi Silva Dec 02 '19 at 06:50
I have added raw data in quetion please check – ashwini patil Dec 02 '19 at 06:56

score 0 · Answer 2 · answered Dec 02 '19 at 08:04

Data you are passing has no issue. It is working. Try this please.

Create another class like this.

public class StackData
    {
        public string Stack{ get; set; }
}

Then use that class with the parameter in api method as below.

public async Task<IActionResult> Post([FromBody] StackData Stack)

I want to pass very long string as parameter in Asp .net core web api POST method?

2 Answers2