编辑:这个程序试图使用C#读取excel文件,然后将数据添加到sql developer的表中。
我遇到了一个我似乎无法弄清楚的错误。当我尝试将excel数据加载到消息框中时,我得到了这个:
Retrieving the COM class factory for component with CLSID {00020819-0000-0000-C000-000000000046} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).
此错误出现在:
Microsoft.Office.Interop.Excel.Workbook workbook = new Microsoft.Office.Interop.Excel.Workbook();
我已经对这个特定错误进行了研究,并尝试了我发现的所有内容。我尝试将属性中的Platform Target
更改为x86
,就像有些人说的那样,取消选中Prefer 32-bit
并将Platform Target
留在Any CPU
。我想我可能错过了一个重要的参考,但注意到我已经有了.NET Microsoft.Office.Interop.Excel
,当我尝试添加COM等效时,它没有帮助。作为参考,我使用的是32位Windows操作系统。
非常感谢有关此错误发生原因的任何帮助。感谢。
以下是该类中的完整代码:
namespace ReadExcel
{
public partial class Form1 : Form
{
public Microsoft.Office.Interop.Excel._Application excelApp = new Microsoft.Office.Interop.Excel.Application() { DisplayAlerts = false, Visible = false };
public List<Attorney> listOfAttys = Helpers.getAttorneys();
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
setAttyList();
}
private void setAttyList()
{
foreach (var item in listOfAttys.Select(x => x.Caption))
cmbAtty.Items.Add(item);
}
private void btnRun_Click(object sender, EventArgs e)
{
Microsoft.Office.Interop.Excel.Workbook workbook = new Microsoft.Office.Interop.Excel.Workbook();
//Microsoft.Office.Interop.Excel.Style style = new Microsoft.Office.Interop.Excel.Style();
//Microsoft.Office.Interop.Excel.Worksheet worksheet = new Microsoft.Office.Interop.Excel.Worksheet();
try
{
workbook = excelApp.Workbooks.Open(txtbxFilename.Text);
Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets.get_Item(1);
Microsoft.Office.Interop.Excel.Range xlRange = worksheet.UsedRange;
int rowCount = xlRange.Rows.Count;
int colCount = xlRange.Columns.Count;
for(int i=1; i <= rowCount; i++)
{
for(int j=1; j <= colCount; j++)
{
MessageBox.Show(xlRange.Cells[i,j].Value2.ToString());
}
}
if (validateHeader(worksheet))
{
}
}
catch (Exception ex)
{
}
excelApp.Quit();
}
private void btnLoad_Click(object sender, EventArgs e)
{
txtbxFilename.Text = null;
System.IO.Stream myStream = null;
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.InitialDirectory = "C:\\";
openFileDialog1.Filter = "Excel files (*.xlsx)|*.xlsx";
openFileDialog1.FilterIndex = 2;
openFileDialog1.RestoreDirectory = true;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
try
{
if ((myStream = openFileDialog1.OpenFile()) != null)
{
txtbxFilename.Text = openFileDialog1.FileName;
myStream.Close();
myStream.Dispose();
}
}
catch (Exception ex)
{
MessageBox.Show("Error: Could not read file from disk. Original error: " + ex.Message);
}
}
}
private bool validateHeader(Microsoft.Office.Interop.Excel.Worksheet Worksheet)
{
if (Worksheet == null)
return false;
bool isValid = false;
//get header row
//check all cell values
return isValid;
}
//private int getWorkSheetLength(int startPoint, char column, Microsoft.Office.Interop.Excel.Worksheet sheet)
//{
// int i = startPoint;
// while (sheet.Range(column + i).Text.ToString().Replace("/r", String.Empty).Replace("/n", String.Empty).Replace(" ", String.Empty) != String.Empty)
// i++;
// i--;
// return i;
//}
}
public class Attorney
{
public string AttorneyID { get; set; }
public int OrganizationID { get; set; }
public string AttorneyName { get; set; }
public string Caption { get; set; }
}
public class LegalTransactionRec
{
public string AccountNumber { get; set; }
public decimal CostAmount { get; set; }
public string SSN { get; set; }
public int BatchID { get; set; }
public Attorney Attorney { get; set; }
public DateTime TransactionDate { get; set; }
public string Description { get; set; }
public int TransactionCode { get; set; }
}
public class ReviewOutput
{
}
public class ApprovedOutput
{
}
}
答案 0 :(得分:7)
var workbook = new Microsoft.Office.Interop.Excel.Workbook();
这是您的代码中的错误。您无法像这样创建工作簿的新实例,而必须使用Application.WorkBooks.Add()方法。
它相当于工厂方法,一般是软件工程和Office互操作中的常见模式。没有得到不可用构造函数的编译时错误是COM互操作责任。当您意识到Workbook是一个接口而不是一个类时,您可以看到摩擦。使 new 关键字在COM接口类型上起作用的映射是不完美的。