錯誤2：System.Security.Cryptography.CryptographicException: 系統(tǒng)找不到指定的文件。

在 System.Security.Cryptography.Utils.CreateProvHandle(CspParameters parameters, Boolean randomKeyContainer)

在 System.Security.Cryptography.RSACryptoServiceProvider.ImportParameters(RSAParameters parameters)

在 Com.Alipay.RSAFromPkcs8.DecodeRSAPrivateKey(Byte[] privkey) 位置 E:\aspnet2.0\nyweb_jia\Com.Alipay\RSA.cs:行號 331

未將對象引用設(shè)置到對象的實(shí)例。

說明: 執(zhí)行當(dāng)前 Web 請求期間，出現(xiàn)未處理的異常。請檢查堆棧跟蹤信息，以了解有關(guān)該錯誤以及代碼中導(dǎo)致錯誤的出處的詳細(xì)信息。

異常詳細(xì)信息: System.NullReferenceException: 未將對象引用設(shè)置到對象的實(shí)例。

源錯誤:

執(zhí)行當(dāng)前 Web 請求期間生成了未處理的異常。可以使用下面的異常堆棧跟蹤信息確定有關(guān)異常原因和發(fā)生位置的信息。

堆棧跟蹤:

[NullReferenceException: 未將對象引用設(shè)置到對象的實(shí)例。]

Com.Alipay.RSAFromPkcs8.RSASignCharSet(String data, String privateKey, String charset) in E:\aspnet2.0\nyweb_jia\Com.Alipay\RSA.cs:48

Com.Alipay.RSAFromPkcs8.sign(String content, String privateKey, String input_charset) in E:\aspnet2.0\nyweb_jia\Com.Alipay\RSA.cs:30

Com.Alipay.Submit.BuildRequestMysign(Dictionary`2 sPara) in E:\aspnet2.0\nyweb_jia\Com.Alipay\AlipaySubmit.cs:56

Com.Alipay.Submit.BuildRequestPara(SortedDictionary`2 sParaTemp) in E:\aspnet2.0\nyweb_jia\Com.Alipay\AlipaySubmit.cs:82

Com.Alipay.Submit.BuildRequest(SortedDictionary`2 sParaTemp, String strMethod, String strButtonValue) in E:\aspnet2.0\nyweb_jia\Com.Alipay\AlipaySubmit.cs:120

Company.payapi.alipay.testpay.BtnAlipay_Click(Object sender, EventArgs e) in E:\aspnet2.0\nyweb_jia\Company\payapi\alipay\testpay.aspx.cs:61

System.Web.UI.WebControls.Button.OnClick(EventArgs e) +114

System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +139

System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +28

System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2980

將代碼中：

RSACryptoServiceProvider RSA  = new RSACryptoServiceProvider();
改為：
    /*
                 CspParameters RSAParams = new CspParameters();
                 RSAParams.Flags = CspProviderFlags.UseMachineKeyStore;
                 System.Security.Cryptography.RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(1024, RSAParams);
                 *
                 *  估計(jì)是權(quán)限問題，后來加了一行代碼問題解決 RSACryptoServiceProvider.UseMachineKeyStore = true;
                 * */
                RSACryptoServiceProvider.UseMachineKeyStore = true;
                RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();