How to check a specific string contains in the Json object in core api

Question

Hi I have a function which will check given project name is include in the json object. For that I am not getting a proper json object in my response how to do that? this is my object {"projects":[{"name":"projects/sTest"},{"name":"projects/A345"},{"name":"projects/off"},{"name":"projects/dds"}] i have one main method which will call public bool CheckDuplicate(string name) method to return whether any same name inside the object or not. public async Task string > UploadData( string name, string url) { var hasMatch = CheckDuplicate(name); //post project_name methode here which will happen only hasmatch is false.need to block same names } public bool CheckDuplicate( string name) { string pname = name.Substring(9, name.Length - 9); HttpClient client = new HttpClient(); client.BaseAddress = new Uri(httpRequest); client.DefaultRequestHeaders.Accept.Add( new MediaTypeWithQualityHeaderValue( "application/json" )); HttpResponseMessage response = client.GetAsync(httpRequest).Result; var result = response.Content.ReadAsStringAsync().Result; in result i am getting my objects like { "projects" :[{ "name" : "projects/sTest" },{ "name" : "projects/A345" },{ "name" : "projects/off" },{ "name" : "projects/dds" }] var JSONObj = JsonConvert.DeserializeObject(result); // i am getting values in JSONObj but below code is not working //cant check the given pname is there or not var hasMatch = false ; for (var index = 0; index { var Projects = JSONObj[index]; if (Projects.name == pname) { hasMatch = true ; } else { hasMatch = false ; } } return hasMatch; }

Varun Setia · Answer

This condition returns a boolean result hasMatch = data.projects.Where(c => c.name == pname).Count() > 0;//if count >0 i.e. project exists then true else false return hasMatch;

Sachin Singh · Answer

you don't need to use count. simply use Any(). step 1. Design your class (if you haven't already) public class Project { public string name { get; set; } } public class Root { public List projects { get; set; } } step 2. deserialize it Root myDeserializeddata = JsonConvert.DeserializeObject (myJsonResponse); step 3. use Any() extension method (which will return true/false) return myDeserializeddata.Any(x=>x.name==pname); note:- make sure your method return type is bool if you want to return true/false.

Sujeet Raman · Answer

and if i have to throw a simple error message to postman how i can give that message ? instead of this any json method is available? else { var message = "Project Name Already exist!"; return message; }

Sujeet Raman · Answer

how i will return boolean?below code i, not getting var hasMatch = false; var data = JsonConvert.DeserializeObject (result); hasMatch = data.projects.Where(c => c.name == pname).Count() > 0; if (hasMatch) { return hasMatch; } else { return hasMatch; } }

Sujeet Raman · Answer

i am getting projects.so we need to give an if condition to hasmatch true?

Varun Setia · Answer

Your poco classes seems fine. You can use them like this in logic. var data = JsonConvert.DeserializeObject ( result ); hasMatch = data.projects.Where(c => c.name == pname).Count() > 0; Except, i cannot find use of nextPageToken, but you can keep that.

Sujeet Raman · Answer

that poco class how i can rewrie? currently i have using System; using System.Collections.Generic; using System.Text; namespace testdata { public class ResultGetProjects { public class Project { public string name { get; set; } } public List projects { get; set; } public string nextPageToken { get; set; } } }

Varun Setia · Answer

Like this, will this help ? public bool CheckDuplicate(string name) { string pname = name.Substring(9, name.Length - 9); HttpClient client = new HttpClient(); client.BaseAddress = new Uri(httpRequest); client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json")); HttpResponseMessage response = client.GetAsync(httpRequest).Result; var result = response.Content.ReadAsStringAsync().Result; in result i am getting my objects like {"projects":[{"name":"projects/sTest"},{"name":"projects/A345"},{"name":"projects/off"},{"name":"projects/dds"}] var JSONObj = JsonConvert.DeserializeObject(result); // i am getting values in JSONObj but below code is not working //cant check the given pname is there or not var hasMatch = false; var data = JsonConvert.DeserializeObject (result); hasMatch = data.projects.Where(c => c.name == pname).Count() > 0; return hasMatch; }

Sujeet Raman · Answer

couldnt get your point

Varun Setia · Answer

//POCO Classes public class Project { public string name { get; set; } } public class Projects { public List projects { get; set; } } } //Comparison var data = JsonConvert.DeserializeObject (result); hasMatch = data.projects.Where(c => c.name == pname).Count() > 0;