為什么我得到“ DLL中發生了類型為'System.StackOverflowException'的未處理的異常”

Question

我可以在目標路徑上成功上傳文件，但是出現此錯誤，我也不知道為什么。

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.IO;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using R.One.Data;
using System.Data.SqlClient;
using R.One.All.Common.Base;
using R.One.All.Common.Base.Components;
using R.One.All.Common.Base.DAO;
using R.One.All.Common.BusinessObjects;
using R.WebServices.Facilities;

namespace Facilities.UploadSRLogo
{
    public partial class UploadSRLogo : SaveFileUploadBasePage
    {
        private string destinationFilePath = string.Empty;
        private int maxFileSize = 2048000;
        private bool isUpload = true;
        private void Page_Load(object sender, EventArgs e)
        {
            //Get the Posted File
        }

        protected override void SetOutputFilePath()
        {
            try
            {
                FileRepository fr = new FileRepository(base.Env, base.DBServer);
                string repositoryPath = fr.getRepositoryPath(base.user.PMCID.ToString(), "");
                string internalPath = @"\R\Facilities\";
                string outputFilePath = string.Format("{0}{1}", repositoryPath, internalPath);

                FileInfo file = new FileInfo(outputFilePath);
                if (!file.Directory.Exists)
                {
                    file.Directory.Create();
                }

                System.IO.Directory.CreateDirectory(outputFilePath);
                string tempFileName = System.Guid.NewGuid().ToString();
                file = new FileInfo(this.ImportFile.Value);
                destinationFilePath = outputFilePath + tempFileName + System.IO.Path.GetExtension(file.Extension);
                if (System.IO.File.Exists(destinationFilePath) == true)
                {
                    System.IO.File.SetAttributes(destinationFilePath, System.IO.FileAttributes.Normal);
                }
                this.OutputFilePath = destinationFilePath;
                if (this.ImportFile.PostedFile.ContentLength > maxFileSize)
                {
                    uploadResponse.ConfirmAction = false;
                    FileResult.Value = "ERR_FILE_SIZE";
                }
                else if (this.ImportFile.PostedFile.ContentLength <= 0)
                {
                    uploadResponse.ConfirmAction = false;
                    FileResult.Value = "ERR_FILE_EMPTY";
                }
                else
                    uploadResponse.ConfirmAction = true;
            }
            catch (Exception ex)
            {
                uploadResponse.ConfirmAction = false;
                uploadResponse.ReasonFailed = "System error: " + ex.Message + " : " + ex.StackTrace;
                uploadResponse.TechnicalReasonFailed = "Error in UploadPreferredItems - SetOutputFilePath";
            }

        }


        protected override void PostHandleInputFile()
        {
            if (!uploadResponse.ConfirmAction) return;

            try
            {
                SaveSRLogoPhotoSite(destinationFilePath);

                if (isUpload)
                {
                    base.OutputObjects.Add("UploadResponse", uploadResponse);
                }
                return;
            }
            catch (Exception ex)
            {
                uploadResponse.ConfirmAction = false;
                uploadResponse.ReasonFailed = "System error: " + ex.Message + " : " + ex.StackTrace;
                uploadResponse.TechnicalReasonFailed = "Error in UploadSRLogo - PostHandleInputFile";
            }
        }


        #region Private Methods

        private SRLogoPhoto SaveSRLogoPhotoSite(string destinationFilePath)
        {
            return SaveSRLogoPhotoSite(destinationFilePath);
        }

        #endregion Private Methods
    }
}

我在這部分上得到錯誤：

private SRLogoPhoto SaveSRLogoPhotoSite(string destinationFilePath)
{   <------on this part is the error
   return SaveSRLogoPhotoSite(destinationFilePath);
}

幫助請。 SaveSRLogoPhotoSite方法位於上面的“使用R.WebServices.Facilities”中包含的另一個asmx.cs文件中。

作為參考，我還將在下面粘貼SaveSRLogoPhotoSite方法：

#region SaveSRLogoPhotoSite
[WebMethod(EnableSession = true, Description = "Save sr logo photo in site db")]
[SoapHeader("Authentication")]
[R.One.All.Common.Base.Attributes.ProtectionLevel(true, 10, 20, "8vwsr", RightsBehavior = "or")]
[R.One.All.Common.Base.Attributes.SoapAuthExtension(Priority = 1)]
public SRLogoPhoto SaveSRLogoPhotoSite(string filePath)
{
    DataSet ds = null;
    Hashtable param = new Hashtable();
    SRLogoPhoto srlp = new SRLogoPhoto();

    try
    {

        System.IO.FileStream fs = new System.IO.FileStream(filePath, System.IO.FileMode.Open, System.IO.FileAccess.Read);

        Byte[] b = new Byte[fs.Length];
        fs.Read(b, 0, b.Length);
        fs.Close();
        SqlParameter P = new SqlParameter("@Picture", SqlDbType.VarBinary, b.Length, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Current, b);

        string sqlStr = "UPDATE SRSiteLogo SET srImage = @Picture ";

        param.Add("Picture", P);

        dbHelper.Entity = OneSiteDB.DBEntity.Site;
        ds = dbHelper.GetDataSet(sqlStr, param);


        #region SQL Code
        string sqlStr2 = "select srImage from SRSiteLogo";
        #endregion

        int PictureCol = 0;
        SqlDataReader reader = dbHelper.ExecuteSqlDataReader(sqlStr2);
        reader.Read();
        Byte[] b2 = new Byte[(reader.GetBytes(PictureCol, 0, null, 0, int.MaxValue))];
        reader.GetBytes(PictureCol, 0, b2, 0, b2.Length);
        reader.Close();

        string webservicepath = Path.GetDirectoryName(AppDomain.CurrentDomain.SetupInformation.ConfigurationFile);
        string destfilepath = webservicepath.Replace("\\WebServices\\Facilities", "\\221\\Facilities\\300\\Setup\\srlogo\\images\\S" + base.SiteID + "Logo.jpg");

        System.IO.FileStream fs2 = new System.IO.FileStream(destfilepath, System.IO.FileMode.Create, System.IO.FileAccess.Write);
        fs2.Write(b2, 0, b2.Length);
        fs2.Close();

    }
    catch (Exception ex)
    {
        srlp.Error = "SaveSRLogoPhotoSite() web method failed on call to dbHelper.GetDataSet - " + ex.Message;
    }

    return srlp;
}

#endregion

Answer 1

在這個片段中

private SRLogoPhoto SaveSRLogoPhotoSite(string destinationFilePath)
{   <------on this part is the error
   return SaveSRLogoPhotoSite(destinationFilePath);
}

SaveSRLogoPhotoSite(string)方法正在調用自身。 因此，如果您一次調用該方法，它將繼續調用自身，直到用完堆棧。 得到一個StackOverflowException 。

如果要在另一個程序集或命名空間中實現一個要調用的實現，則必須使用全名對其進行限定

private SRLogoPhoto SaveSRLogoPhotoSite(string destinationFilePath)
{   
   return SomeAssembly.SomeNamespace.SaveSRLogoPhotoSite(destinationFilePath);
}

如果您已從另一位置復制了這段代碼（您說“ SaveSRLogoPhotoSite方法位於另一個asmx.cs上”，但我不確定是什么意思），則必須弄清楚SaveSRLogoPhotoSite所指的是什么。上下文。

Answer 2

private SRLogoPhoto SaveSRLogoPhotoSite(string destinationFilePath)
{   <------on this part is the error
   return SaveSRLogoPhotoSite(destinationFilePath);
}

哦，具有諷刺意味的是，我們在stackoverflow.com上...

此代碼沒有任何意義。 它調用自身而沒有任何其他操作（或中斷條件）。 這將導致“無休止”的遞歸。 當然，直到堆棧已滿。

Answer 3

它是遞歸調用嗎？ 逐步調試。 （或者構造函數不起作用，因為初始化會崩潰。）

=>實現您的SaveSRLogoPhotoSite函數