无法加载类型Microsoft.Office.Interop.Excel._Application [英] Could not load type Microsoft.Office.Interop.Excel._Application

问题描述

当我尝试调试读取Excel文件的代码时，我收到一个错误。我想知道如果引用Microsoft.Office.Interop.Excel._Application是错误的，我收到以下错误。

不是 Microsoft.Office.Interop.Excel 版本假设为12？而不是从我的项目组合装载？

无法加载类型
'Microsoft.Office.Interop.Excel._Application'
来自程序集Dialog，
Version = 1.0.0.0，Culture = neutral，
PublicKeyToken = null'。该类型是
标记为符合类型
等价的资格，但$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $
$ / b
$ b

当我尝试调试代码之前，我会得到异常，然后我可以进入该功能。

  DataTable data = ExcelImport.GetDataFromFile（file）; 
  

我的功能

 code> public static DataSet GetDataFromFile（string fileName）
 {
应用程序oXL; 
工作簿oWB; 
工作表oSheet; 
范围oRng; 
 
 //需要用excel文件解决文化问题。 
 CultureInfo cult = System.Threading.Thread.CurrentThread.CurrentCulture; 
 System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo（en-US）; 
 try 
 {
 //创建一个应用程序对象
 oXL = new Application（）; 
 //获取WorkBook对象
 oWB = oXL.Workbooks.Open（fileName，Missing.Value，Missing.Value，
 Missing.Value，Missing.Value，Missing.Value，
 Missing.Value，Missing.Value，Missing.Value，
 Missing.Value，Missing.Value，Missing.Value，Missing.Value，
 Missing.Value，Missing.Value）; 
 
 //获取WorkSheet对象
 oSheet =（Worksheet）oWB.Sheets [1]; 
 System.Data.DataTable dt = new System.Data.DataTable（dtExcel）; 
 DataSet ds = new DataSet（）; 
 ds.Tables.Add（dt）; 
 
 // StringBuilder sb = new StringBuilder（）; 
 int jValue = oSheet.UsedRange.Cells.Columns.Count; 
 int iValue = oSheet.UsedRange.Cells.Rows.Count; 
 //获取数据列
（int j = 1; j< = jValue; j ++）
 {
 dt.Columns.Add（column+ j，Type .GetType（ System.String））; 
} 
 
 //获取单元格
中的数据（int i = 1; i = iValue; i ++）
 {
 var test = （范围）oSheet.Cells [i，1]; 
 
 if（！string.IsNullOrEmpty（test.Text））
 {
 DataRow dr = ds.Tables [dtExcel] NewRow（）; 
 for（int j = 1; j< = jValue; j ++）
 {
 oRng =（Range）oSheet.Cells [i，j]; 
 string strValue = oRng.Text.ToString（）; 
 dr [column+ j] = strValue; 
} 
 ds.Tables [dtExcel]。Rows.Add（dr）; 
} 
} 
 oXL.Workbooks.Close（）; 
 System.Threading.Thread.CurrentThread.CurrentCulture =邪教
 return ds; 
} 
 catch（Exception ex）
 {
 throw new Exception（Error reading excel file，ex）; 
} 
} 
  

解决方案

一个href =https://stackoverflow.com/users/492405/vcsjones> vcsjones 表示让我在正确的轨道上。关闭嵌入式互操作程序集后，我需要编辑web.config来信任Excel

 < system.web> 
< trust level =FulloriginUrl =/> 
  

I'm getting a error when I try to debug a code that reads Excel files. I'm wondering if the reference to 'Microsoft.Office.Interop.Excel._Application' is wrong, I get the following error.

isn't the Microsoft.Office.Interop.Excel version suppose to be 12? and not loaded from my project assembly?

Could not load type 'Microsoft.Office.Interop.Excel._Application' from assembly 'Dialog, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. The type is marked as eligible for type equivalence, but the containing assembly is not loaded as fully trusted.

When I try to debug the code I get the exception before I can step into the function.

DataTable data = ExcelImport.GetDataFromFile(file);

My function

public static DataSet GetDataFromFile(string fileName)
    {
        Application oXL;
        Workbook oWB;
        Worksheet oSheet;
        Range oRng;

        // Needed to fix culture problem with excel files.
        CultureInfo cult = System.Threading.Thread.CurrentThread.CurrentCulture;
        System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US");
        try
        {
            //  creat a Application object
            oXL = new Application();
            //   get   WorkBook  object
            oWB = oXL.Workbooks.Open(fileName, Missing.Value, Missing.Value,
                    Missing.Value, Missing.Value, Missing.Value,
                    Missing.Value, Missing.Value, Missing.Value,
                    Missing.Value, Missing.Value, Missing.Value, Missing.Value,
                    Missing.Value, Missing.Value);

            //   get   WorkSheet object
            oSheet = (Worksheet)oWB.Sheets[1];
            System.Data.DataTable dt = new System.Data.DataTable("dtExcel");
            DataSet ds = new DataSet();
            ds.Tables.Add(dt);

            //StringBuilder sb = new StringBuilder();
            int jValue = oSheet.UsedRange.Cells.Columns.Count;
            int iValue = oSheet.UsedRange.Cells.Rows.Count;
            //  get data columns
            for (int j = 1; j <= jValue; j++)
            {
                dt.Columns.Add("column" + j, Type.GetType("System.String"));
            }

            //  get data in cell
            for (int i = 1; i <= iValue; i++)
            {
                var test = (Range)oSheet.Cells[i, 1];

                if (!string.IsNullOrEmpty(test.Text))
                {
                    DataRow dr = ds.Tables["dtExcel"].NewRow();
                    for (int j = 1; j <= jValue; j++)
                    {
                        oRng = (Range)oSheet.Cells[i, j];
                        string strValue = oRng.Text.ToString();
                        dr["column" + j] = strValue;
                    }
                    ds.Tables["dtExcel"].Rows.Add(dr);
                }
            }
            oXL.Workbooks.Close();
            System.Threading.Thread.CurrentThread.CurrentCulture = cult;
            return ds;
        }
        catch (Exception ex)
        {
            throw new Exception("Error reading excel file", ex);
        }
    }

解决方案

vcsjones commend got me on the correct track. after turning off Embedding Interop Assemblies I needed to edit the web.config to trust Excel

<system.web>
    <trust level="Full" originUrl="" />

这篇关于无法加载类型Microsoft.Office.Interop.Excel._Application的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！