二维数组的C#NET2008问题 [英] C#NET2008 Problem with Two Dimensional Array

问题描述

你好朋友，:laugh:
我再次需要你的帮助.请帮帮我.

我正在使用C#NET2008开发使用二维数组存储字符串文本和INT数据的应用程序

这些是错误消息:
错误#1索引超出了数组的范围.
错误#2无法将类型"int"隐式转换为字符串"

Hello Good Friends, :laugh:
I need your help again. Please help me.

I am using C#NET2008 to develop application using Two Dimension Array to store String text and INT data

These are the error messages:
Error #1 Index was outside the bounds of the array.
Error #2 Cannot implicitly convert type ''int'' to ''string''

private string[ , ] strColmArray = new string[9, 1];

private void FLoadColmArray()
   {
       strColmArray[0, 0] = "Order ID";
       strColmArray[0, 1] =  "Ord487";  <--- Error #1

       strColmArray[1, 0]  = "Product ID";
       strColmArray[1,1]   =  750.45;  <- Error #2
    }

推荐答案

strColmArray[0, 1] =  "Ord487";  <--- Error #1

您的数组很小，这就是为什么您会遇到第一个错误的原因. 试试

Your array is small, that''s why you get the first error.
Try

private string[ , ] strColmArray = new string[9, 2]

第二个错误-是因为您不能使用字符串数组来存储整数，请尝试:

The second error - is because you can''t use a string array to store integers, try:

strColmArray[1,1]   =  "750.45";  - Error #2

附带说明一下，请勿将二维数组用于此类操作.
您可以使用数据表或强类型对象列表来执行此类操作.

As a side note, don''t use a two dimensional array for this kind of things.
You can use a DataTable or a List Of Strongly typed objects to do these kind of things.

您的数组太小了！！数字键分别为9和1，在第一个数组维中为您提供9个插槽，在第二个数组维中为您提供 1 插槽.
索引基于零，因此:

Your array is too small! The nubmers are 9 and 1 giving you 9 slots in the first array dimension and 1 slot in the second array dimension.
Indexes are zero based so:

private string[ , ] strColmArray = new string[9, 1];
private void FLoadColmArray()
   {
       strColmArray[0, 0] = "Order ID";
       strColmArray[0, 1] =  "Ord487";  //This is the second slot in the second array but you declared only one slot

       strColmArray[1, 0]  = "Product ID";
       strColmArray[1,1]   =  750.45;  //should be "750.45" as there is no implicit cast from that to a string it will have to be done explicitely or expressed as a string in the first place
    }

我认为您需要阅读一些有关数组和从零开始的索引的信息.

最好的问候，

曼弗雷德(Manfred)

I think you need to read some on arrays and zero based indexes.

Best Regards,

Manfred

如果您的IT高级团队负责人已请求阵列，请给他一个阵列.

但是，它不能是字符串数组，因为其中一条数据是整数，除非您每次想读取或存储该数据时都与字符串进行相互转换.

您可以使用类型为Object
的数组

If your IT Senior Team Leader has requested an Array, then give him an Array.

It cannot, however, be a string Array since one of the pieces of data is an integer, unless you convert to and from a string each time you want to read or store that data.

You could use an Array of type Object

private object[ , ] objColmArray = new object[9, 1];

这将允许您存储任何数据类型，但缺点是要利用数据，在读取数据时必须转换/广播数据.

我的首选项(如果必须是数组)将是使用自定义类的一维数组

which will allow you to store any data type but has the disadvantage that to make use of the data you will have to convert/cast the data when reading it.

My preference, if it has to be an Array, would be to use a one dimensional array of a custom class

internal class MyClass
{
  public string Name {get; set;}
  public int Value {get; set;}
}

private MyClass[] mcColmArray = new MyClass[100];

我真正的偏好是与您的IT高级团队负责人聊天，以找出为什么他们不希望您使用阵列时的最佳选择.

My real preference would be to have a chat with your IT Senior Team Leader to find out why they want you to use an Array when it is not the best option.

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