[英]C#: Class does not contain a definition
我目前正在尝试通过名称搜索对象数组,并希望输出为数组的索引。 但是,当我尝试调用搜索函数时发生错误(不包含定义)。 我不知道如何解决这个问题。
我对编程非常陌生,所以如果我做错了所有事情,请原谅我,请保持简单。
class Program
{
static void Main(string[] args)
{
//Initialize array based on number of records
RecordArray.Init(5);
//Calling FindByName
RecordArray.FindByName (RecordArray.rArray, "Name3");
}
}
public class RecordClass
{
//Declaring member variables
public string Name;
public int Number;
public string Email;
}
public class RecordArray
{
public static void Init(int Size)
{
//RNG for phone numbers
Random Rnd = new Random();
//Creating an array of RecordClass
RecordClass[] rArray = new RecordClass[Size];
//Loop through the array
for(int i = 0; i < rArray.Length; i++)
{
rArray[i].Name = "Name" + i;
rArray[i].Number = Rnd.Next();
rArray[i].Email = rArray[i].Name + "@gmail.com";
}
}
public static int FindByName(RecordClass[] rArray, string Name)
{
//Loop through rArray to find if Name matches. If match, return index. Otherwise, return -1.
for(int i = 0; i < rArray.Length; i++)
{
if (rArray[i].Name == Name)
{
return i;
}
}
return -1;
}
}
}
rarray仅在函数中声明,因此您将无法访问它。 你可以尝试这样的事情
public static RecordClass[] Init(int Size)
{
//RNG for phone numbers
Random Rnd = new Random();
//Creating an array of RecordClass
RecordClass[] rArray = new RecordClass[Size];
//Loop through the array
for(int i = 0; i < rArray.Length; i++)
{
RecordClass record = new RecordClass();
record.Name = "Name" + i;
record.Number = Rnd.Next();
record.Email = record.Name + "@gmail.com";
rArray[I] = record;
}
return rArray;
}
static void Main(string[] args)
{
//Initialize array based on number of records
//Calling FindByName
RecordArray.FindByName (RecordArray.Init(5), "Name3");
}
首先,让我开始说,几乎不需要编写自己的数组。
C#langange和.NET框架支持数组和许多其他集合类型,因此实际上并不需要它。
话虽如此,这是您当前代码的问题所在:
RecordArray
类不包含名为rArray
的成员。
为了使代码正常工作,您必须在init函数中拆分以下行:
//Creating an array of RecordClass
RecordClass[] rArray = new RecordClass[Size];
分成两个单独的代码行。 首先,必须为rArray
创建一个静态成员,其次,您需要在Init
方法中对其进行Init
:
public class RecordArray
{
public static RecordClass[] rArray {get; private set;}
public static void Init(int Size)
{
//RNG for phone numbers
Random Rnd = new Random();
//Creating an array of RecordClass
rArray = new RecordClass[Size];
//Loop through the array
for(int i = 0; i < rArray.Length; i++)
{
rArray[i] = new RecordClass();
rArray[i].Name = "Name" + i;
rArray[i].Number = Rnd.Next();
rArray[i].Email = rArray[i].Name + "@gmail.com";
}
}
public static int FindByName(RecordClass[] rArray, string Name)
{
//Loop through rArray to find if Name matches. If match, return index. Otherwise, return -1.
for(int i = 0; i < rArray.Length; i++)
{
if (rArray[i].Name == Name)
{
return i;
}
}
return -1;
}
}
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