c# 無法將類型隱式轉換

C＃隱式類型數組 (C# Implicitly Typed Arrays)

Like implicitly typed variables, we can also declare an array without specifying its type such type of arrays are known as Implicitly typed arrays.

像隱式類型的變量一樣，我們也可以在不指定其類型的情況下聲明一個數組，這樣的數組類型稱為隱式類型的數組 。

The type of the array is determined by the compiler based on the initializer list.

數組的類型由編譯器根據初始化列表確定。

Syntax:

句法：

    var array_name = new[] {initialize_list/elements};

Example:

例：

    var arr1 = new[] { 10, 20, 30, 40, 50 };
var arr2 = new[] { 10.0f, 20.1f, 30.2f, 40.3f, 50.4f };
var arr3 = new[] { "Manju", "Amit", "Abhi", "Radib", "Prem" };

Here, arr1 will be determined as int[] (integer array), arr2 as float[] (float/single array), and arr3 as String[] (string array).

在這里，將arr1確定為int [] (整數數組)，將arr2確定為float [] (浮點數/單數組)，將arr3確定為String [] (字符串數組)。

C＃代碼演示隱式類型數組的示例 (C# code to demonstrate example of implicitly typed arrays )

using System;
using System.Text;
namespace Test
{
class Program
{
static void Main(string[] args)
{
var arr1 = new[] { 10, 20, 30, 40, 50 };
var arr2 = new[] { 10.0f, 20.1f, 30.2f, 40.3f, 50.4f };
var arr3 = new[] { "Manju", "Amit", "Abhi", "Radib", "Prem" };
//printing type of the array
Console.WriteLine("Type of arr1: " + arr1.GetType());
Console.WriteLine("Type of arr2: " + arr2.GetType());
Console.WriteLine("Type of arr3: " + arr3.GetType());
//printing the elements
Console.WriteLine("arr1 elements...");
foreach (var item in arr1)
{
Console.Write(item + " ");
}
Console.WriteLine();
Console.WriteLine("arr2 elements...");
foreach (var item in arr2)
{
Console.Write(item + " ");
}
Console.WriteLine();
Console.WriteLine("arr3 elements...");
foreach (var item in arr3)
{
Console.Write(item + " ");
}
Console.WriteLine();
//hit ENTER to exit
Console.ReadLine();
}
}
}

Output

輸出量

Type of arr1: System.Int32[]
Type of arr2: System.Single[]
Type of arr3: System.String[]
arr1 elements...
10 20 30 40 50
arr2 elements...
10 20.1 30.2 40.3 50.4
arr3 elements...
Manju Amit Abhi Radib Prem

翻譯自: https://www.includehelp.com/dot-net/implicitly-typed-arrays-in-c-sharp.aspx

c# 無法將類型隱式轉換