Cs1503 c как исправить

using System;
using System.IO;
using System.Collections.Generic;
 
namespace Grapher
{ class Program
{
    static void Main(string[] args)
    {
        string[] data = File.ReadAllLines("массив.txt");
        int length = data[0].Split(';').Length, i;
        Graph graph = new Graph();
        for (i = 0; i < length; i++)
        {
            string[] str = data[i].Split(';');
            var vertices = new Dictionary<char, int>();
            for (int j = 0; j < length; j++)
                if (Convert.ToInt32(str[j]) != 0)
                    vertices.Add(Char.Parse((j + 1).ToString()), Convert.ToInt32(str[j]));
 
            graph.add_vertex(Char.Parse((i + 1).ToString()), vertices);
        }
       
        string start = Console.ReadLine(); // Номер начального пункта
            string end = Console.ReadLine(); // Номер конечного пункта
        var result = graph.all_ways(start, end, "", 0);
 
        using (var sw = new StreamWriter("результат.txt"))
        {
            foreach (var item in result)
                sw.WriteLine(item);
            sw.WriteLine("Кратчайшее расстояние равно " + graph.shortest_path(start, end));
        }
        Console.Write("Результат был сохранен в файле результат.txt");
        Console.ReadLine();
    }
}
}

    class Graph
    {
        Dictionary<char, Dictionary<char, int>> vertices = new Dictionary<char, Dictionary<char, int>>();
        public void add_vertex(char name, Dictionary<char, int> edges)
        {
            vertices[name] = edges;
        }
        public List<string> all_ways(char current, char end, string path, int weight)
        {
            List<string> pathes = new List<string>();
            if (path.IndexOf(current.ToString() + " ") != -1)
 
                return pathes;
            else
                if (path == "")
                path = current.ToString() + " = 0";
            else
            {
                int index = path.IndexOf("=");
                string temp = path.Substring(0, index);
                string sum = path.Substring(index + 1);
                weight += Convert.ToInt32(sum);
                path = temp + "-> " + current.ToString() + " = " + weight.ToString();
            }
            if (current == end)
            {
                pathes.Add(path);
                return pathes;
            }
            foreach (KeyValuePair<char, int> pair in vertices[current])
            {
                List<string> result = all_ways(pair.Key, end, path, pair.Value);
                if (result.Count != 0)
                    pathes.AddRange(result);
            }
            return pathes;
        }
        public int shortest_path(char start, char finish)
        {
            var previous = new Dictionary<char, char>();
            var distances = new Dictionary<char, int>();
            var nodes = new List<char>();
 
            List<char> path = null;
 
            foreach (var vertex in vertices)
            {
                if (vertex.Key == start)
                {
                    distances[vertex.Key] = 0;
                }
                else
                {
                    distances[vertex.Key] = int.MaxValue;
                }
 
                nodes.Add(vertex.Key);
            }
 
            while (nodes.Count != 0)
            {
                nodes.Sort((x, y) => distances[x] - distances[y]);
 
                var smallest = nodes[0];
                nodes.Remove(smallest);
 
                if (smallest == finish)
                {
                    path = new List<char>();
                    while (previous.ContainsKey(smallest))
                    {
                        path.Add(smallest);
                        smallest = previous[smallest];
                    }
 
                    break;
                }
 
                if (distances[smallest] == int.MaxValue)
                {
                    break;
                }
 
                foreach (var neighbor in vertices[smallest])
                {
                    var alt = distances[smallest] + neighbor.Value;
                    if (alt < distances[neighbor.Key])
                    {
                        distances[neighbor.Key] = alt;
                        previous[neighbor.Key] = smallest;
                    }
                }
            }
            if (path.Count > 0)
                return distances[path[0]];
            else
                return 0;
        }
    }

public partial class Login : Form
{
    string connectionString = @"Data Source=(LocalDB)MSSQLLocalDB;AttachDbFilename=J:Plate ReaderDBInfoDB.mdf;Integrated Security=True;Connect Timeout=30";
    SqlDataReader mdr;

    public Login()
    {
        InitializeComponent();
    }

    private void btnSearch_Click(object sender, EventArgs e)
    {
        using (SqlConnection sqlCon = new SqlConnection(connectionString))
        {
            sqlCon.Open();
            string selectQuery = "SELECT * From Plate WHERE Plate='" + txtPlate.Text;
            SqlCommand command = new SqlCommand(selectQuery, sqlCon);

            mdr = command.ExecuteReader();

            if (mdr.Read())
            {
                labelName.Text = mdr.GetString("Name");  //Right here
                labelWanted.Text = mdr.GetInt32("Bounty").ToString(); //and here
            }
            else
            {
                MessageBox.Show("No Data For This Plate");
            }
        }
    }
}

3 ответа

Лучший ответ

 labelName.Text = mdr.GetString(mdr.GetOrdinal("Name")); 

public static class ReaderExtensions
{
     public static string GetString(this SqlDataReader source, string fieldName)
     {
         return source.GetString(source.GetOrdinal(fieldName));
     }
}

string labelText = mdr.GetString("Name");

mdr.GetInt32(mdr.GetOrdinal("Name"));

using System;
using UnityEngine;
using UnityEngine.InputSystem;

namespace platformer
{

    public class HeroInput : MonoBehaviour
    {
    
        [SerializeField] private Hero _hero;

        private HeroInputAction _inputActions;

        private void Awake()
        {
        _inputActions = new HeroInputAction();
        _inputActions.Hero.HorizontalMovement.performed += OnHorizontalMovement;
        _inputActions.Hero.HorizontalMovement.canceled += OnHorizontalMovement;

        _inputActions.Hero.SaySomething.performed += OnSaySomething;
        }

        private void OnEnable() 
        {
        _inputActions.Enable();
        }
        
    

        private void OnHorizontalMovement(InputAction.CallbackContext context )
        {
        var direction = context.ReadValue<float>();
        _hero.SetDirection(direction);
        
        }

        private void OnSaySomething(InputAction.CallbackContext context)
        {
          
        _hero.SaySomething();
        
        }   
    }
}

Error cs1503 argument 1 cannot convert from system collections ienumerable to string

Лучший отвечающий

Вопрос

I am trying to populate data from OpenWeatherMap using below code but getting this error:

Error CS1503 Argument 1: cannot convert from ‘Samana.WeatherInfo.List’ to ‘System.Collections.Generic.IEnumerable ‘

can anyone help please..

This is my code:

and the WeatherInfo is here:

Ответы

Maybe you should use this?

var result = JsonConvert.DeserializeObject ( data );

ObservableCollection trends = new ObservableCollection ( result.list );

Все ответы

Try add the following inside your WeatherInfo class:

Basically your problem is that, you’re just declaring a lot of class schema inside WeatherInfo without declaring any variable.

Источник

Error cs1503 argument 1 cannot convert from system collections ienumerable to string

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Answered by:

Question

I am trying to populate data from OpenWeatherMap using below code but getting this error:

Error CS1503 Argument 1: cannot convert from ‘Samana.WeatherInfo.List’ to ‘System.Collections.Generic.IEnumerable ‘

can anyone help please..

This is my code:

and the WeatherInfo is here:

Answers

Maybe you should use this?

var result = JsonConvert.DeserializeObject ( data );

ObservableCollection trends = new ObservableCollection ( result.list );

Try add the following inside your WeatherInfo class:

Basically your problem is that, you’re just declaring a lot of class schema inside WeatherInfo without declaring any variable.

Источник