C# Compiler Error
CS0101 – The namespace ‘namespace’ already contains a definition for ‘type’
Reason for the Error
You will receive this error when your namespace has duplicate identifiers that is declared.
For example, the below code snippet contains the namespace DeveloperPublish but contains two classes with the same name “Class1”.
namespace DeveloperPublish { class Class1 { } class Class1 { } public class Program { public static void Main() { } } }
This will result with the error.
Error CS0101 The namespace ‘DeveloperPublish’ already contains a definition for ‘Class1’ ConsoleApp2 C:UsersadminsourcereposConsoleApp2ConsoleApp2Program.cs 8 Active
Solution
To fix the error, rename or delete one of the duplicate identifiers. If it is a class, try moving it to a different namespace.
I’ve created a separate folder and pages in my ASP.NET web application. When I build the solution, I receive the error
The Namespace MyApp already contains a defintion for VDS
Here’s the contents of VDS.Master.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace MayApp{
public partial class VDS : System.Web.UI.MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
}
}
}
Here’s the content of VDS.Master.designer.cs:
//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
namespace MyApp.VDS {
public partial class VDS {
/// <summary>
/// Head1 control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.HtmlControls.HtmlHead Head1;
/// <summary>
/// head control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.WebControls.ContentPlaceHolder head;
/// <summary>
/// form1 control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.HtmlControls.HtmlForm form1;
/// <summary>
/// ScriptManager1 control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.ScriptManager ScriptManager1;
/// <summary>
/// NavMenu control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.WebControls.Menu NavMenu;
/// <summary>
/// smds1 control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.WebControls.SiteMapDataSource smds1;
/// <summary>
/// MainContent control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.WebControls.ContentPlaceHolder MainContent;
/// <summary>
/// lblfoot control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
Here’s the content of VDS.Master:
<%@ Master Language="C#" AutoEventWireup="True" CodeBehind="VDS.Master.cs" Inherits="MyApp.VDS.VDS" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Dealer Services</title>
<asp:ContentPlaceHolder ID="head" runat="server">
</asp:ContentPlaceHolder>
<link href="Styles/master.css" rel="stylesheet" type="text/css" />
</head>
<body>
<form id="form1" runat="server">
<div class="container">
<div class="header">
<h1>Welcome to Dealer Services </h1>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
</div>
<div class=" clear nav">
<asp:Menu runat="server" ID="NavMenu" BackColor="Silver" DataSourceID="smds1"
DynamicHorizontalOffset="2" Font-Names="Verdana" Font-Size="0.8em"
ForeColor="White" Orientation="Horizontal" StaticSubMenuIndent="10px">
<DynamicHoverStyle BackColor="#284E98" ForeColor="White" />
<DynamicMenuItemStyle HorizontalPadding="5px" VerticalPadding="2px" />
<DynamicMenuStyle BackColor="#B5C7DE" />
<DynamicSelectedStyle BackColor="#507CD1" />
<StaticHoverStyle BackColor="#284E98" ForeColor="White" />
<StaticMenuItemStyle HorizontalPadding="5px" VerticalPadding="2px" />
<StaticSelectedStyle BackColor="#507CD1" />
</asp:Menu>
<asp:SiteMapDataSource ID="smds1" runat="server" ShowStartingNode="False" />
</div>
<div class="login">
</div>
<div class="content">
<asp:ContentPlaceHolder id="MainContent" runat="server">
</asp:ContentPlaceHolder>
</div>
<div class="footer">
<asp:Label runat="server" ID="lblfoot">™ Veehco Inc. 2011</asp:Label>
</div>
</div>
</form>
</body>
</html>
I’ve tried deleting the VDS.Master.designer.cs file, but the error is returned upon each build. How do I rectify this issue?
Thanks much!
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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace Неокогнитрон { public class Neuron { protected double[,] inputs; protected double synapse; protected double output; public Neuron() { inputs = new double[4, 4]; for (int i = 0; i < 4; i++) for (int j = 0; j < 4; j++) inputs[i, j] = 0; synapse = 0; output = 0; } public void setInputs(int a, int b, int c, int d, double[,] mas) { int k = 0; int n = 0; for (int i = a; i < b; i++) { for (int j = c; j < d; j++) { inputs[k, n] = mas[i, j]; n++; } k++; n = 0; } } public double[,] getInputs() { return inputs; } public double getSynapse() { return synapse; } }; public class SCell : Neuron { private double[,] SSynapses; private double lateralSynapse; public SCell() { lateralSynapse = 0; SSynapses = new double[4, 4]; for (int i = 0; i < 4; i++) for (int j = 0; j < 4; j++) SSynapses[i, j] = 0; } public void setSSynapses(int a, int b, int c, int d, double[,] mas) { int k = 0; int n = 0; for (int i = a; i < b; i++) { for (int j = c; j < d; j++) { SSynapses[k, n] = mas[i, j]; n++; } k++; n = 0; } } public void setLateralSynapse(double num) { lateralSynapse = num; } public double getLateralSynapse() { return lateralSynapse; } public double getSOutput(double num1, double num2, double output1, double output2) { double E = 0; double I = 0; double NET = 0; for (int i = 0; i < 4; i++) for (int j = 0; j < 4; j++) E += (SSynapses[i, j] * inputs[i, j]); I = ((num1 * output1) + (num2 * output2)); NET = (((1 + E) / (1 + I)) - 1); if (NET > 0) output = NET; else output = 0; return output; } } public class C : Neuron { private double cSynapse; public void setCSynapse(double num) { cSynapse = num; } public double getCOutput() { for (int i = 0; i < 4; i++) for (int j = 0; j < 4; j++) if (inputs[i, j] > 0) { output = 1; break; } return output; } public void startChangeCSynapse(double q1, double syn, double outp) { synapse = (q1 * syn * outp); } public void ChangeCSynapse(double q, double syn, double outp) { synapse = (q * syn * outp); } } public class Brake : Neuron { private double[,] BSynapses; public Brake() { BSynapses = new double[4, 4]; for (int i = 0; i < 4; i++) for (int j = 0; j < 4; j++) BSynapses[i, j] = 0; } public void setBSynapses(int a, int b, int c, int d, double[,] mas) { int k = 0; int n = 0; for (int i = a; i < b; i++) { for (int j = c; j < d; j++) { BSynapses[k, n] = mas[i, j]; n++; } k++; n = 0; } } public double getBOutput() { for (int i = 0; i < 4; i++) for (int j = 0; j < 4; j++) output += Math.Pow((BSynapses[i, j] * inputs[i, j]), 2); return Math.Sqrt(output); } public void startChangeBSynapse(double q) { synapse = (q * output); } public void changeBSynapse(double q) { double sum = 0; for (int i = 0; i < 4; i++) for (int j = 0; j < 4; j++) sum += (BSynapses[i, j] * inputs[i, j]); synapse = ((q * sum) / (2 * output)); } } public class Lateral : Neuron { private double[,] LSynapses; private double lInhib; public Lateral() { lInhib = 0; LSynapses = new double[4, 4]; for (int i = 0; i < 4; i++) for (int j = 0; j < 4; j++) LSynapses[i, j] = 0; } public void setLSynapses(int a, int b, int c, int d, double[,] mas) { int k = 0; int n = 0; for (int i = a; i < b; i++) { for (int j = c; j < d; j++) { LSynapses[k, n] = mas[i, j]; n++; } k++; n = 0; } } public void setLInhib() { for (int i = 0; i < 4; i++) for (int j = 0; j < 4; j++) lInhib += (LSynapses[i, j] * inputs[i, j]); } public double getLOutput(double num) { output = (((1 + num) / (1 + lInhib)) - 1); return output; } } } |
#c# #unity3d
#c# #unity3d
Вопрос:
Я изучаю модификаторы доступа и наткнулся на следующую ошибку в своем коде. Может кто-нибудь объяснить мне и помочь решить эту проблему? Активы Тесты Скрипты modificadoracesso.cs(40,7): ошибка CS0101: пространство имен ‘< глобальное пространство имен >’ уже содержит определение для ‘Felino’
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class modificadoracesso : MonoBehaviour
{
Felino gatoFase1; // criar objeto
Felino gatoFase2;
Filha fi;
// Start is called before the first frame update
void Start()
{
gatoFase1 = new Felino (); //objeto
gatoFase2 = new Felino ();
fi = new Filha();
//gatoFase1.nome = "mark";
gatoFase1.ataque();
gatoFase1.corPelo = "Preto";
gatoFase1.forca = 100;
//gatoFase2.nome = "Zuck";
gatoFase2.corPelo = "Marrom";
gatoFase2.ataque();
fi.acessa();
}
// Update is called once per frame
void Update()
{
}
}
class Felino : MonoBehaviour
{
//Características = atributos
//protected trabalha dentro a classe ou dentro de uma classe filha
protected string nome;
public string corPelo;
public int forca;
//Ações = métodos
public void ataque()
{
print("Ataquei");
}
}
class Filha : Felino
{
public void acessa()
{
nome = "Gato";
}
}
Я искал некоторые ответы, но пока ничего не работает
Комментарии:
1. Часть глобального пространства имен связана с тем, что у вас нет пространства имен в вашем коде. Однако я не понимаю, почему у вас есть дубликат
Felino
.2. я бразилец, и я не понял предложение «пространство имен», может ли это показать мне практическим способом?
3. каким будет <глобальное пространство имен>?
Ответ №1:
Если класс не находится в пространстве имен, то класс должен находиться в ‘глобальном пространстве имен’. Добавьте пространство имен вокруг ваших классов. Я не говорю, что это полный ответ, но не использовать пространства имен — плохая идея. Пространства имен обычно начинаются с имени вашего решения и будут помещены туда автоматически при создании нового класса.
Попробуйте это:
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
namespace ToDyToScAnO // <-- This is a namespace
{
public class modificadoracesso : MonoBehaviour
{
Felino gatoFase1; // criar objeto
Felino gatoFase2;
Filha fi;
// Start is called before the first frame update
void Start()
{
gatoFase1 = new Felino (); //objeto
gatoFase2 = new Felino ();
fi = new Filha();
//gatoFase1.nome = "mark";
gatoFase1.ataque();
gatoFase1.corPelo = "Preto";
gatoFase1.forca = 100;
//gatoFase2.nome = "Zuck";
gatoFase2.corPelo = "Marrom";
gatoFase2.ataque();
fi.acessa();
}
// Update is called once per frame
void Update()
{
}
}
class Felino : MonoBehaviour
{
//Características = atributos
//protected trabalha dentro a classe ou dentro de uma classe filha
protected string nome;
public string corPelo;
public int forca;
//Ações = métodos
public void ataque()
{
print("Ataquei");
}
}
class Filha : Felino
{
public void acessa()
{
nome = "Gato";
}
}
}
Ответ №2:
Обычно это происходит, когда вы перетаскиваете скрипт в другую папку, в то время как в вашем текстовом редакторе скрипт все еще открыт. Когда вы сохраняете файл в текстовом редакторе, файл создается заново в старом расположении, поэтому у вас есть дубликат сценария для перемещенного сценария.
Ответ №3:
Это только потому, что у вас в проекте есть другой скрипт с таким именем! Возможно, вы случайно дублируете его или что-то в этомроде.
July 12, 2010 · 3:26 pm
Recently I received the error: CS0101: The namespace ‘namespace_name’ already contains a definition for ‘class_name’ for one of my web applications. There may be a number of reasons why this occurs but before I share why this happened to me, here is the background on the problem.
I had created a file named msAccess.cs. Visual Studio assigned the name “msAccess” to my namespace. I gave my class in the name MsAccessConnection. Initially when I wrote the web application I thought it was going to be a very straightforward app. However, like most things it grew and evolved. I saw many things wrong with my code and decided to restructure my msAccess.cs file itself. But for the sake of maintaining preserving the functioning copy in case anything went bad, I renamed my msAccess.cs file to msAccess_old.cs. Then when I recreated my new one, I gave it the original name msAccess.cs.
When Visual studio found both cs files in the directory, it read the namespaces in both. Eventhough one was set to compile and the other was excluded from the project, Visual Studio still read the excluded .cs file (i.e. msAccess_old.cs). Therefore I received the error: CS0101: The namespace ‘msAccess’ already contains a definition for ‘MsAccessConnection’.
Little bugs like this often frustrate me, especially when the solution is so simple and is overlooked. Therefore, if you turn to Google or any other search engine as I often do, I hope this post is relevant and helped you.
Oh, as a solution, I renamed my msAccess_old.cs file to msAccess_old.txt. I just changed the file extension and that did the trick.