使用Nethereum库的以太坊.NET、C#开发示例

这是一篇文章的早期版本，旨在帮助那些对以太坊区块链平台有基本了解的开发人员，如果想学习如何使用Nethereum .NET库对Ethereum平台进行编程。

我以后会在这篇文章中添加更多内容，但就目前而言，正在使用它发布.NET 10+的系列C＃示例，介绍如何使用Nethereum库执行针对以太坊区块链平台的最常见任务。

最常见任务列表包括以下内容：

• 1.获取协议版本
• 2.获取最大块数
• 3.获取帐户余额
• 4.发送以太
• 5.等待交易收据
• 6.在区块链中扫描块
• 7.列出个人账户（及其余额）
• 8.在区块链中扫描交易
• 9.与现有（已部署）合同互动
• 10.用事件和现有（已部署）合约交互
• 11.获取所有活动更改
• 12.获取合约金额历史

这里是c#的主文件：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

using Nethereum.Hex.HexTypes;
using Nethereum.Web3;

namespace MWH.MyNethereum.QuickRef
{
 static public class TaskExamples
 {
 const int UNLOCK_TIMEOUT = 2 * 60; // 2 minutes (arbitrary)
 const int SLEEP_TIME = 5 * 1000; // 5 seconds (arbitrary)
 const int MAX_TIMEOUT = 2 * 60 * 1000; // 2 minutes (arbirtrary)

// These static public variables do not represent a recommended pattern
 static public string LastProtocolVersion = "";
 static public string LastTxHash = "";
 static public Nethereum.RPC.Eth.DTOs.TransactionReceipt LastTxReceipt = null;
 static public HexBigInteger LastMaxBlockNumber = new HexBigInteger(0);

static public async Task GetProtocolVersionExample(Web3 web3)
 {
 Console.WriteLine("GetProtocolVersionExample:");

var protocolVersion = await web3.Eth.ProtocolVersion.SendRequestAsync();
 Console.WriteLine("protocolVersion:\t" + protocolVersion.ToString());
 LastProtocolVersion = protocolVersion;
 }

static public async Task GetMaxBlockExample(Web3 web3)
 {
 Console.WriteLine("GetMaxBlockExample:");

var maxBlockNumber = await web3.Eth.Blocks.GetBlockNumber.SendRequestAsync();
 Console.WriteLine("maxBlockNumber:\t" + maxBlockNumber.Value.ToString());
 LastMaxBlockNumber = maxBlockNumber;
 }

static public async Task ScanBlocksExample(Web3 web3, ulong startBlockNumber, ulong endBlockNumber)
 {
 Console.WriteLine("ScanBlocksExample:");

long txTotalCount = 0;
 for (ulong blockNumber = startBlockNumber; blockNumber <= endBlockNumber; blockNumber++)
 {
 var blockParameter = new Nethereum.RPC.Eth.DTOs.BlockParameter(blockNumber);
 var block = await web3.Eth.Blocks.GetBlockWithTransactionsByNumber.SendRequestAsync(blockParameter);
 var trans = block.Transactions;
 int txCount = trans.Length;
 txTotalCount += txCount;
 if (blockNumber % 1000 == 0) Console.Write(".");
 if (blockNumber % 10000 == 0)
 {
 DateTime blockDateTime = Helpers.UnixTimeStampToDateTime((double)block.Timestamp.Value);
 Console.WriteLine(blockNumber.ToString() + " " + txTotalCount.ToString() + " " + blockDateTime.ToString());
 }
 }
 Console.WriteLine();
 }

static public async Task ScanTxExample(Web3 web3, ulong startBlockNumber, ulong endBlockNumber)
 {
 Console.WriteLine("ScanTxExample:");

long txTotalCount = 0;
 for (ulong blockNumber = startBlockNumber; blockNumber <= endBlockNumber; blockNumber++)
 {
 var blockParameter = new Nethereum.RPC.Eth.DTOs.BlockParameter(blockNumber);
 var block = await web3.Eth.Blocks.GetBlockWithTransactionsByNumber.SendRequestAsync(blockParameter);
 var trans = block.Transactions;
 int txCount = trans.Length;
 txTotalCount += txCount;
 foreach (var tx in trans)
 {
 try
 {
 var bn = tx.BlockNumber.Value;
 var th = tx.TransactionHash;
 var ti = tx.TransactionIndex.Value;

var rpt = await web3.Eth.Transactions.GetTransactionReceipt.SendRequestAsync(th);
 var status = rpt.Status.Value;

var nc = tx.Nonce.Value;
 var from = tx.From;

Console.WriteLine(th.ToString() + " " + ti.ToStrin