C# TOutput
时间: 2023-11-30 22:43:23 浏览: 33
根据提供的引用内容,我们可以得知TOutput是C#中的一个泛型类型参数,它表示泛型类或方法的输出类型。在使用泛型类或方法时,我们可以将TOutput替换为具体的类型,从而实现对不同类型的支持。下面是一个使用TOutput的例子:
```csharp
public class Example<TInput, TOutput>
{
public TOutput Convert(TInput input)
{
// 这里是转换逻辑
}
}
// 使用示例
var example = new Example<int, string>();
string output = example.Convert(123);
```
在上面的例子中,我们定义了一个泛型类Example,它有两个类型参数TInput和TOutput。在Convert方法中,我们将TInput类型的参数input转换为TOutput类型的返回值。在使用Example类时,我们将TInput和TOutput分别替换为int和string,从而实现了将int类型转换为string类型的功能。
相关问题
c# PriorityQueue
C# doesn't have a built-in implementation of a PriorityQueue, but you can create one using various data structures. One common approach is to use a MinHeap or MaxHeap along with a Dictionary to track the priority of each element.
Here's an example implementation of a PriorityQueue in C#:
```csharp
using System;
using System.Collections.Generic;
public class PriorityQueue<T>
{
private readonly List<T> elements;
private readonly Dictionary<T, int> priorities;
public int Count => elements.Count;
public PriorityQueue()
{
elements = new List<T>();
priorities = new Dictionary<T, int>();
}
public void Enqueue(T element, int priority)
{
elements.Add(element);
priorities[element] = priority;
HeapifyUp(elements.Count - 1);
}
public T Dequeue()
{
if (Count == 0)
throw new InvalidOperationException("Priority queue is empty.");
T frontElement = elements[0];
elements[0] = elements[Count - 1];
elements.RemoveAt(Count - 1);
priorities.Remove(frontElement);
HeapifyDown(0);
return frontElement;
}
public bool Contains(T element)
{
return priorities.ContainsKey(element);
}
private void HeapifyUp(int index)
{
while (index > 0)
{
int parentIndex = (index - 1) / 2;
if (priorities[elements[parentIndex]] <= priorities[elements[index]])
break;
Swap(parentIndex, index);
index = parentIndex;
}
}
private void HeapifyDown(int index)
{
while (true)
{
int leftChildIndex = (2 * index) + 1;
int rightChildIndex = (2 * index) + 2;
int smallestChildIndex = index;
if (leftChildIndex < Count && priorities[elements[leftChildIndex]] < priorities[elements[smallestChildIndex]])
smallestChildIndex = leftChildIndex;
if (rightChildIndex < Count && priorities[elements[rightChildIndex]] < priorities[elements[smallestChildIndex]])
smallestChildIndex = rightChildIndex;
if (smallestChildIndex == index)
break;
Swap(index, smallestChildIndex);
index = smallestChildIndex;
}
}
private void Swap(int index1, int index2)
{
T tempElement = elements[index1];
elements[index1] = elements[index2];
elements[index2] = tempElement;
priorities[elements[index1]] = index1;
priorities[elements[index2]] = index2;
}
}
```
You can use the PriorityQueue like this:
```csharp
PriorityQueue<int> priorityQueue = new PriorityQueue<int>();
priorityQueue.Enqueue(3, 2);
priorityQueue.Enqueue(1, 1);
priorityQueue.Enqueue(5, 3);
while (priorityQueue.Count > 0)
{
int element = priorityQueue.Dequeue();
Console.WriteLine(element);
}
```
This will output:
```
1
3
5
```
Note that this implementation assumes the elements are of a type that supports comparison using the `<` and `>` operators. If your elements are custom objects, you may need to implement the `IComparable<T>` interface or provide a custom comparer.
C# MiniExcel
C# MiniExcel是一个轻量级的Excel读写库,它允许您在C#应用程序中读取和写入Excel文件。MiniExcel具有简单易用的API和高性能,支持读取和写入XLSX格式的Excel文件。
使用C# MiniExcel,您可以将Excel文件作为数据源,轻松地读取其中的数据,并将数据导出为Excel文件。此外,您还可以使用MiniExcel创建新的Excel文件,并将数据写入这些文件中。
以下是使用C# MiniExcel读取Excel文件的示例代码:
```csharp
using (var stream = File.Open("data.xlsx", FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
var workbook = new Workbook();
workbook.Load(stream);
var worksheet = workbook.Worksheets[0];
for (var row = 0; row <= worksheet.MaxRow; row++)
{
for (var column = 0; column <= worksheet.MaxColumn; column++)
{
var cell = worksheet[row, column];
Console.Write($"{cell.Value}\t");
}
Console.WriteLine();
}
}
```
使用上述代码,您可以打开名为"data.xlsx"的Excel文件,并将其内容打印到控制台。
如果您需要将数据写入Excel文件,则可以使用以下代码:
```csharp
var workbook = new Workbook();
var worksheet = workbook.Worksheets.Add("Sheet1");
worksheet[0, 0].Value = "Name";
worksheet[0, 1].Value = "Age";
worksheet[1, 0].Value = "John";
worksheet[1, 1].Value = 25;
workbook.Save("output.xlsx");
```
使用上述代码,您可以创建一个新的Excel文件,并在其中添加一个名为"Sheet1"的工作表。然后,您可以将数据写入该工作表中,并将Excel文件保存为"output.xlsx"。