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.ToString() + " " + from.ToString() + " " + status.ToString()); var to = tx.To; if (to == null) to = "to:NULL"; var v = tx.Value.Value; var g = tx.Gas.Value; var gp = tx.GasPrice.Value; Console.WriteLine(th.ToString() + " " + ti.ToString() + " " + nc.ToString() + " " + from.ToString() + " " + to.ToString() + " " + v.ToString() + " " + g.ToString() + " " + gp.ToString()); } catch (Exception ex) { Console.WriteLine("ScanTxExample.Tx:\t" + ex.ToString()); if (ex.InnerException != null) Console.WriteLine("ScanTxExample.Tx:\t" + ex.InnerException.ToString()); } } Console.WriteLine(); } } static public async Task GetAccountBalanceExample(Web3 web3, string accountAddress) { Console.WriteLine("GetAccountBalanceExample:"); var balanceWei = await web3.Eth.GetBalance.SendRequestAsync(accountAddress); var balanceEther = Web3.Convert.FromWei(balanceWei.Value); Console.WriteLine("accountAddress:\t" + accountAddress.ToString()); Console.WriteLine("balanceEther:\t" + balanceEther.ToString()); } static public async Task ListPersonalAccountsExample(Web3 web3) { Console.WriteLine("ListPersonalAccountsExample:"); var accounts = await web3.Personal.ListAccounts.SendRequestAsync(); foreach (var account in accounts) { var balanceWei = await web3.Eth.GetBalance.SendRequestAsync(account); var balanceEther = Web3.Convert.FromWei(balanceWei.Value); Console.WriteLine("account:\t" + account + " balanceEther:\t" + balanceEther.ToString()); } } static public async Task SendEtherExample(Web3 web3, string fromAddress, string fromPassword, string toAddress, long amountWei) { Console.WriteLine("SendEtherExample:"); var unlockResult = await web3.Personal.UnlockAccount.SendRequestAsync(fromAddress, fromPassword, UNLOCK_TIMEOUT); var sendTxHash = await web3.Eth.TransactionManager.SendTransactionAsync(fromAddress, toAddress, new HexBigInteger(amountWei)); Console.WriteLine("fromAddress:\t" + fromAddress.ToString()); Console.WriteLine("toAddress:\t" + toAddress.ToString()); Console.WriteLine("amountWei:\t" + amountWei.ToString()); Console.WriteLine("sendTxHash:\t" + sendTxHash.ToString()); LastTxHash = sendTxHash; } static public async Task WaitForTxReceiptExample(Web3 web3, string txHash) { Console.WriteLine("WaitForTxReceiptExample:"); int timeoutCount = 0; var txReceipt = await web3.Eth.Transactions.GetTransactionReceipt.SendRequestAsync(txHash); while (txReceipt == null && timeoutCount < MAX_TIMEOUT) { Console.WriteLine("Sleeping..."); Thread.Sleep(SLEEP_TIME); txReceipt = await web3.Eth.Transactions.GetTransactionReceipt.SendRequestAsync(txHash); timeoutCount += SLEEP_TIME; } Console.WriteLine("timeoutCount " + timeoutCount.ToString()); LastTxReceipt = txReceipt; } static public async Task InteractWithExistingContractExample(Web3 web3, string fromAddress, string fromPassword, string contractAddress, string contractAbi) { Console.WriteLine("InteractWithExistingContractExample:"); var contract = web3.Eth.GetContract(contractAbi, contractAddress); var setMessageFunction = contract.GetFunction("setMsg"); var getMessageFunction = contract.GetFunction("getMsg"); string nowTimestamp = DateTime.UtcNow.ToString() + " UTC"; Console.WriteLine("now:\t" + nowTimestamp); var unlockResult = await web3.Personal.UnlockAccount.SendRequestAsync(fromAddress, fromPassword, UNLOCK_TIMEOUT); var txHash1 = await setMessageFunction.SendTransactionAsync(fromAddress, new HexBigInteger(900000), null, 1, "Hello World"); Console.WriteLine("txHash1:\t" + txHash1.ToString()); var txHash2 = await setMessageFunction.SendTransactionAsync(fromAddress, new HexBigInteger(900000), null, 2, nowTimestamp); Console.WriteLine("txHash2:\t" + txHash2.ToString()); var txReceipt2 = await web3.Eth.Transactions.GetTransactionReceipt.SendRequestAsync(txHash2); int timeoutCount = 0; while (txReceipt2 == null && timeoutCount < MAX_TIMEOUT) { Console.WriteLine("Sleeping..."); Thread.Sleep(SLEEP_TIME); txReceipt2 = await web3.Eth.Transactions.GetTransactionReceipt.SendRequestAsync(txHash2); timeoutCount += SLEEP_TIME; } Console.WriteLine("timeoutCount:\t" + timeoutCount.ToString()); var txReceipt3 = await setMessageFunction.SendTransactionAndWaitForReceiptAsync(fromAddress, new HexBigInteger(900000), null, null, 2, nowTimestamp + " Wait"); Console.WriteLine("txReceipt3:\t" + txReceipt3.TransactionHash.ToString()); Console.WriteLine("txReceipt3:\t" + txReceipt3.CumulativeGasUsed.Value.ToString()); var getResult1 = await getMessageFunction.CallAsync<string>(1); Console.WriteLine("getResult1:\t" + getResult1.ToString()); var getResult2 = await getMessageFunction.CallAsync<string>(2); Console.WriteLine("getResult2:\t" + getResult2.ToString()); } static public async Task InteractWithExistingContractWithEventsExample(Web3 web3, string fromAddress, string fromPassword, string contractAddress, string contractAbi) { Console.WriteLine("InteractWithExistingContractWithEventsExample:"); var contract = web3.Eth.GetContract(contractAbi, contractAddress); var setMessageFunction = contract.GetFunction("setMsg"); var getMessageFunction = contract.GetFunction("getMsg"); var multipliedEvent = contract.GetEvent("MultipliedEvent"); var newMessageEvent = contract.GetEvent("NewMessageEvent"); var filterAllMultipliedEvent = await multipliedEvent.CreateFilterAsync(); var filterAllNewMessageEvent = await newMessageEvent.CreateFilterAsync(); string nowTimestamp = DateTime.UtcNow.ToString() + " UTC"; Console.WriteLine("now:\t" + nowTimestamp); var unlockResult = await web3.Personal.UnlockAccount.SendRequestAsync(fromAddress, fromPassword, UNLOCK_TIMEOUT); var txHash1 = await setMessageFunction.SendTransactionAsync(fromAddress, new HexBigInteger(900000), null, 1, "Hello World"); Console.WriteLine("txHash1:\t" + txHash1.ToString()); var txHash2 = await setMessageFunction.SendTransactionAsync(fromAddress, new HexBigInteger(900000), null, 2, nowTimestamp); Console.WriteLine("txHash2:\t" + txHash2.ToString()); var txReceipt2 = await web3.Eth.Transactions.GetTransactionReceipt.SendRequestAsync(txHash2); int timeoutCount = 0; while (txReceipt2 == null && timeoutCount < MAX_TIMEOUT) { Console.WriteLine("Sleeping..."); Thread.Sleep(SLEEP_TIME); txReceipt2 = await web3.Eth.Transactions.GetTransactionReceipt.SendRequestAsync(txHash2); timeoutCount += SLEEP_TIME; } Console.WriteLine("timeoutCount:\t" + timeoutCount.ToString()); var txReceipt3 = await setMessageFunction.SendTransactionAndWaitForReceiptAsync(fromAddress, new HexBigInteger(900000), null, null, 2, nowTimestamp + " Wait"); Console.WriteLine("txReceipt3:\t" + txReceipt3.TransactionHash.ToString()); Console.WriteLine("txReceipt3:\t" + txReceipt3.CumulativeGasUsed.Value.ToString()); var getResult1 = await getMessageFunction.CallAsync<string>(1); Console.WriteLine("getResult1:\t" + getResult1.ToString()); var getResult2 = await getMessageFunction.CallAsync<string>(2); Console.WriteLine("getResult2:\t" + getResult2.ToString()); var logMultipliedEvents = await multipliedEvent.GetFilterChanges<FunctionOutputHelpers.MultipliedEventArgs>(filterAllMultipliedEvent); foreach (var mea in logMultipliedEvents) { Console.WriteLine("multipliedEvent:\t" + mea.Event.sender + " " + mea.Event.oldProduct.ToString() + " " + mea.Event.value.ToString() + " " + mea.Event.newProduct.ToString()); } var logNewMessageEvents = await newMessageEvent.GetFilterChanges<FunctionOutputHelpers.NewMessageEventArgs>(filterAllNewMessageEvent); foreach (var mea in logNewMessageEvents) { Console.WriteLine("newMessageEvent:\t" + mea.Event.sender + " " + mea.Event.ind.ToString() + " " + mea.Event.msg.ToString()); } } static public async Task GetAllChangesExample(Web3 web3, string fromAddress, string fromPassword, string contractAddress, string contractAbi) { Console.WriteLine("GetAllChangesExample:"); var contract = web3.Eth.GetContract(contractAbi, contractAddress); var newMessageEvent = contract.GetEvent("NewMessageEvent"); var filterAllNewMessageEvent = await newMessageEvent.CreateFilterAsync(fromAddress); var logNewMessageEvents = await newMessageEvent.GetAllChanges<FunctionOutputHelpers.NewMessageEventArgs>(filterAllNewMessageEvent); foreach (var mea in logNewMessageEvents) { Console.WriteLine("newMessageEvent:\t" + mea.Event.sender + " " + mea.Event.ind.ToString() + " " + mea.Event.msg.ToString()); } } static public async Task GetContractValuesHistoryUniqueOffsetValueExample(Web3 web3, string contractAddress, HexBigInteger recentBlockNumber, ulong numberBlocks, int offset) { Console.WriteLine("GetContractValuesHistoryUniqueOffsetValueExample:"); string previousValue = ""; for (ulong blockNumber = (ulong)recentBlockNumber.Value; blockNumber > (ulong)recentBlockNumber.Value - numberBlocks; blockNumber--) { var blockNumberParameter = new Nethereum.RPC.Eth.DTOs.BlockParameter(blockNumber); var valueAtOffset = await web3.Eth.GetStorageAt.SendRequestAsync(contractAddress, new HexBigInteger(offset), blockNumberParameter); if (valueAtOffset != previousValue) { var block = await web3.Eth.Blocks.GetBlockWithTransactionsByNumber.SendRequestAsync(blockNumberParameter); DateTime blockDateTime = Helpers.UnixTimeStampToDateTime((double)block.Timestamp.Value); Console.WriteLine("blockDateTime:\t" + blockDateTime.ToString()); for (int storageOffset = 0; storageOffset < offset+2; storageOffset++) { var valueAt = await web3.Eth.GetStorageAt.SendRequestAsync(contractAddress, new HexBigInteger(storageOffset), blockNumberParameter); Console.WriteLine("value:\t" + blockNumber.ToString() + " " + storageOffset.ToString() + " " + valueAt + " " + Helpers.ConvertHex(valueAt.Substring(2))); } previousValue = valueAtOffset; } } } } }以下是一些支持文件：