关闭 Excel 工作簿 - System.Runtime.InteropServices.COMException:HRESULT 异常:0x800A03EC
Closing Excel Workbook - System.Runtime.InteropServices.COMException : Exception from HRESULT: 0x800A03EC
我在下面的方法中输入了 return 来自 XLS 文件单元格的值:
public static string ReadFromExcel(string filePath, int sheetNum, int xCell, int yCell)
{
List<string> rowValue = new List<string> {};
var ExcelFilePath = @filePath;
Excel.Application xlApp = new Excel.Application();
Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(ExcelFilePath);
Excel._Worksheet xlWorksheet = xlWorkbook.Sheets[sheetNum];
Excel.Range xlRange = xlWorksheet.UsedRange;
int rowCount = xlRange.Rows.Count;
int colCount = xlRange.Columns.Count;
xlApp.ThisWorkbook.Close(); //<-- here it throws the exception in the title
xlApp.Quit();
return xlRange.Cells[xCell, yCell].Value2.ToString();
}
当前代码显然会生成异常,因为我关闭了工作簿和应用程序,然后 return 值。有什么办法加
xlApp.ThisWorkbook.Close();
xlApp.Quit();
仍然 return 值?
谢谢。
使用一个变量"returnValue",例如:
var returnValue = xlRange.Cells[xCell, yCell].Value2.ToString();
xlApp.ThisWorkbook.Close();
xlApp.Quit();
return returnValue;
更新
错误代码表明以下原因之一:
# as an HRESULT: Severity: FAILURE (1), Facility: 0xa, Code 0x3ec
# for hex 0x3ec / decimal 1004 :
INVALID_RESOURCETYPE_LOOKSALIVE clusvmsg.h
JET_wrnColumnNull esent98.h
# /* Column is NULL-valued */
NMERR_BLOB_ENTRY_DOES_NOT_EXIST netmon.h
SQL_1004_severity_16 sql_err
# Invalid column prefix '%.*ls': No table name specified
SCEEVENT_ERROR_POLICY_QUEUE uevents.mc
# Notification of policy change from LSA/SAM failed to be
# added to policy queue.
# %1
ERROR_INVALID_FLAGS winerror.h
# Invalid flags.
EVENT_MAN_PROFILE_NO_FILE_ACCESS wlevents.mc
# The user %1 does not have access to the mandatory profile
# located at %2.
EVENT_UAE_VERIFICATION_FAILURE wlevents2.mc
# Verification of an automatically enrolled certificate has
# failed. (%1) %2
WPA_MUST_ACTIVATE_NOW_EVENT wpaevent.mc
# This copy of Windows must be activated with Microsoft
# before you can continue. To activate Windows, please
# contact a customer service representative.
# 9 matches found for "0x800A03EC"
也许您的 xCell、yCell 不在 UsedRange 中。您能否单步执行代码 "Debug it" 和 post 与您遇到的场景相匹配的屏幕截图?谢谢。
解决方案
这里解释了你遇到的问题:How do I properly clean up Excel interop objects?
要克服它,您可以使用 AutoReleaseComObject 或原始的 VSTO-Contrib。下面是一些代码,向您展示如何使用它:
using Microsoft.Office.Interop.Excel;
using System.Runtime.InteropServices;
namespace ExcelInterop
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
Microsoft.Office.Interop.Excel.Application excelApp;
private void button1_Click(object sender, EventArgs e)
{
string path = @"C:\temp\Logfile.CSV";
int sheetNum = 1;
string returnValue = string.Empty;
var missing = Type.Missing;
int xCell = 1, yCell = 1;
using (AutoReleaseComObject<Microsoft.Office.Interop.Excel.Application> excelRCWWrapper = new AutoReleaseComObject<Microsoft.Office.Interop.Excel.Application>(new Microsoft.Office.Interop.Excel.Application()))
{
var excelApp = excelRCWWrapper.ComObject;
var excelAppWkBooks = excelApp.Workbooks;
try
{
using (AutoReleaseComObject<Workbook> excelAppWkBk = new AutoReleaseComObject<Workbook>(excelAppWkBooks.Open(path, false, false, missing, missing, missing, true, missing, missing, true, missing, missing, missing, missing, missing)))
{
var workbookComObject = excelAppWkBk.ComObject;
Worksheet sheetSource = workbookComObject.Sheets[sheetNum];
using (AutoReleaseComObject< Range> excelAppRange = new AutoReleaseComObject<Range>(sheetSource.UsedRange))
{
returnValue = excelAppRange.ComObject.Cells[xCell, yCell].Value2.ToString();
}
ReleaseObject(sheetSource);
workbookComObject.Close(false);
}
}
finally
{
excelAppWkBooks.Close();
ReleaseObject(excelAppWkBooks);
excelRCWWrapper.ComObject.Application.Quit();
excelRCWWrapper.ComObject.Quit();
ReleaseObject(excelRCWWrapper.ComObject.Application);
ReleaseObject(excelRCWWrapper.ComObject);
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
}
}
}
private static void ReleaseObject(object obj)
{
try
{
while (System.Runtime.InteropServices.Marshal.ReleaseComObject(obj) > 0) ;
obj = null;
}
catch (Exception ex)
{
obj = null;
Console.WriteLine("Unable to release the Object " + ex.ToString());
}
}
}
}
这里是 AutoReleaseComObject class:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
namespace ExcelInterop
{
public class AutoReleaseComObject<T> : IDisposable
{
private T m_comObject;
private bool m_armed = true;
private bool m_disposed = false;
public AutoReleaseComObject(T comObject)
{
Debug.Assert(comObject != null);
m_comObject = comObject;
}
#if DEBUG
~AutoReleaseComObject()
{
// We should have been disposed using Dispose().
Debug.WriteLine("Finalize being called, should have been disposed");
if (this.ComObject != null)
{
Debug.WriteLine(string.Format("ComObject was not null:{0}, name:{1}.", this.ComObject, this.ComObjectName));
}
//Debug.Assert(false);
}
#endif
public T ComObject
{
get
{
Debug.Assert(!m_disposed);
return m_comObject;
}
}
private string ComObjectName
{
get
{
if (this.ComObject is Microsoft.Office.Interop.Excel.Workbook)
{
return ((Microsoft.Office.Interop.Excel.Workbook)this.ComObject).Name;
}
return null;
}
}
public void Disarm()
{
Debug.Assert(!m_disposed);
m_armed = false;
}
#region IDisposable Members
public void Dispose()
{
Dispose(true);
#if DEBUG
GC.SuppressFinalize(this);
#endif
}
#endregion
protected virtual void Dispose(bool disposing)
{
if (!m_disposed)
{
if (m_armed)
{
int refcnt = 0;
do
{
refcnt = System.Runtime.InteropServices.Marshal.ReleaseComObject(m_comObject);
} while (refcnt > 0);
m_comObject = default(T);
}
m_disposed = true;
}
}
}
}
这是一张屏幕截图,向您展示我已成功运行!
我在下面的方法中输入了 return 来自 XLS 文件单元格的值:
public static string ReadFromExcel(string filePath, int sheetNum, int xCell, int yCell)
{
List<string> rowValue = new List<string> {};
var ExcelFilePath = @filePath;
Excel.Application xlApp = new Excel.Application();
Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(ExcelFilePath);
Excel._Worksheet xlWorksheet = xlWorkbook.Sheets[sheetNum];
Excel.Range xlRange = xlWorksheet.UsedRange;
int rowCount = xlRange.Rows.Count;
int colCount = xlRange.Columns.Count;
xlApp.ThisWorkbook.Close(); //<-- here it throws the exception in the title
xlApp.Quit();
return xlRange.Cells[xCell, yCell].Value2.ToString();
}
当前代码显然会生成异常,因为我关闭了工作簿和应用程序,然后 return 值。有什么办法加
xlApp.ThisWorkbook.Close();
xlApp.Quit();
仍然 return 值?
谢谢。
使用一个变量"returnValue",例如:
var returnValue = xlRange.Cells[xCell, yCell].Value2.ToString();
xlApp.ThisWorkbook.Close();
xlApp.Quit();
return returnValue;
更新
错误代码表明以下原因之一:
# as an HRESULT: Severity: FAILURE (1), Facility: 0xa, Code 0x3ec
# for hex 0x3ec / decimal 1004 :
INVALID_RESOURCETYPE_LOOKSALIVE clusvmsg.h
JET_wrnColumnNull esent98.h
# /* Column is NULL-valued */
NMERR_BLOB_ENTRY_DOES_NOT_EXIST netmon.h
SQL_1004_severity_16 sql_err
# Invalid column prefix '%.*ls': No table name specified
SCEEVENT_ERROR_POLICY_QUEUE uevents.mc
# Notification of policy change from LSA/SAM failed to be
# added to policy queue.
# %1
ERROR_INVALID_FLAGS winerror.h
# Invalid flags.
EVENT_MAN_PROFILE_NO_FILE_ACCESS wlevents.mc
# The user %1 does not have access to the mandatory profile
# located at %2.
EVENT_UAE_VERIFICATION_FAILURE wlevents2.mc
# Verification of an automatically enrolled certificate has
# failed. (%1) %2
WPA_MUST_ACTIVATE_NOW_EVENT wpaevent.mc
# This copy of Windows must be activated with Microsoft
# before you can continue. To activate Windows, please
# contact a customer service representative.
# 9 matches found for "0x800A03EC"
也许您的 xCell、yCell 不在 UsedRange 中。您能否单步执行代码 "Debug it" 和 post 与您遇到的场景相匹配的屏幕截图?谢谢。
解决方案
这里解释了你遇到的问题:How do I properly clean up Excel interop objects?
要克服它,您可以使用 AutoReleaseComObject 或原始的 VSTO-Contrib。下面是一些代码,向您展示如何使用它:
using Microsoft.Office.Interop.Excel;
using System.Runtime.InteropServices;
namespace ExcelInterop
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
Microsoft.Office.Interop.Excel.Application excelApp;
private void button1_Click(object sender, EventArgs e)
{
string path = @"C:\temp\Logfile.CSV";
int sheetNum = 1;
string returnValue = string.Empty;
var missing = Type.Missing;
int xCell = 1, yCell = 1;
using (AutoReleaseComObject<Microsoft.Office.Interop.Excel.Application> excelRCWWrapper = new AutoReleaseComObject<Microsoft.Office.Interop.Excel.Application>(new Microsoft.Office.Interop.Excel.Application()))
{
var excelApp = excelRCWWrapper.ComObject;
var excelAppWkBooks = excelApp.Workbooks;
try
{
using (AutoReleaseComObject<Workbook> excelAppWkBk = new AutoReleaseComObject<Workbook>(excelAppWkBooks.Open(path, false, false, missing, missing, missing, true, missing, missing, true, missing, missing, missing, missing, missing)))
{
var workbookComObject = excelAppWkBk.ComObject;
Worksheet sheetSource = workbookComObject.Sheets[sheetNum];
using (AutoReleaseComObject< Range> excelAppRange = new AutoReleaseComObject<Range>(sheetSource.UsedRange))
{
returnValue = excelAppRange.ComObject.Cells[xCell, yCell].Value2.ToString();
}
ReleaseObject(sheetSource);
workbookComObject.Close(false);
}
}
finally
{
excelAppWkBooks.Close();
ReleaseObject(excelAppWkBooks);
excelRCWWrapper.ComObject.Application.Quit();
excelRCWWrapper.ComObject.Quit();
ReleaseObject(excelRCWWrapper.ComObject.Application);
ReleaseObject(excelRCWWrapper.ComObject);
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
}
}
}
private static void ReleaseObject(object obj)
{
try
{
while (System.Runtime.InteropServices.Marshal.ReleaseComObject(obj) > 0) ;
obj = null;
}
catch (Exception ex)
{
obj = null;
Console.WriteLine("Unable to release the Object " + ex.ToString());
}
}
}
}
这里是 AutoReleaseComObject class:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
namespace ExcelInterop
{
public class AutoReleaseComObject<T> : IDisposable
{
private T m_comObject;
private bool m_armed = true;
private bool m_disposed = false;
public AutoReleaseComObject(T comObject)
{
Debug.Assert(comObject != null);
m_comObject = comObject;
}
#if DEBUG
~AutoReleaseComObject()
{
// We should have been disposed using Dispose().
Debug.WriteLine("Finalize being called, should have been disposed");
if (this.ComObject != null)
{
Debug.WriteLine(string.Format("ComObject was not null:{0}, name:{1}.", this.ComObject, this.ComObjectName));
}
//Debug.Assert(false);
}
#endif
public T ComObject
{
get
{
Debug.Assert(!m_disposed);
return m_comObject;
}
}
private string ComObjectName
{
get
{
if (this.ComObject is Microsoft.Office.Interop.Excel.Workbook)
{
return ((Microsoft.Office.Interop.Excel.Workbook)this.ComObject).Name;
}
return null;
}
}
public void Disarm()
{
Debug.Assert(!m_disposed);
m_armed = false;
}
#region IDisposable Members
public void Dispose()
{
Dispose(true);
#if DEBUG
GC.SuppressFinalize(this);
#endif
}
#endregion
protected virtual void Dispose(bool disposing)
{
if (!m_disposed)
{
if (m_armed)
{
int refcnt = 0;
do
{
refcnt = System.Runtime.InteropServices.Marshal.ReleaseComObject(m_comObject);
} while (refcnt > 0);
m_comObject = default(T);
}
m_disposed = true;
}
}
}
}
这是一张屏幕截图,向您展示我已成功运行!