使用 C# 读取损坏的 excel

Question

我想使用 C# 控制台打开损坏的 excel 并从中读取数据 application.I 正在尝试使用以下代码：

 public System.Data.DataTable EXc(string path, string savedFile)
        {
            try
            {
                Missing missing = Missing.Value;
               Excel.Application excel = new Excel.Application();
                Microsoft.Office.Interop.Excel.Workbook workbook = excel.Workbooks.Open(path,
                    missing, missing, missing, missing, missing,
                    missing, missing, missing, missing, missing,
                    missing, missing, missing, Microsoft.Office.Interop.Excel.XlCorruptLoad.xlRepairFile);
                workbook.Close(true, missing, missing);
                if (workbook != null)
                {
                    workbook.SaveAs(savedFile, Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookDefault,
                        missing, missing, missing, missing,
                        Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, missing,
                        missing, missing, missing, missing);

            }

但我遇到了异常

specified cast is not valid

排队

workbook.SaveAs(savedFile, Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookDefault,
                            missing, missing, missing, missing,
                            Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, missing,
                            missing, missing, missing, missing);

你能帮我解决这个问题吗？

Answer 1

我认错了：

我试图保存一个关闭的工作簿，可能是因为我得到了那个异常

Specified cast is not valid

使用互操作打开损坏的 excel 后，我们可以使用 oledb 连接并将该数据复制到数据表或数据集中并可以使用。

public System.Data.DataTable CorruptedExcel（字符串路径，字符串保存文件） {

        try
        {
            Missing missing = Missing.Value;
           Excel.Application excel = new Excel.Application();

           Microsoft.Office.Interop.Excel.Workbook workbook = excel.Workbooks.Open(path, CorruptLoad: Microsoft.Office.Interop.Excel.XlCorruptLoad.xlRepairFile);

            var connectionString = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + path + ";Extended Properties=\"Excel 8.0;HDR=YES;TypeGuessRows=0;ImportMixedTypes=Text\"";
            //var connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=\"Excel 12.0;IMEX=1;HDR=NO;TypeGuessRows=0;ImportMixedTypes=Text\""; ;
            using (var conn = new OleDbConnection(connectionString))
            {

                conn.Open();

                var sheets = conn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
                using (var cmd = conn.CreateCommand())
                {
                    cmd.CommandText = "SELECT * FROM [" + sheets.Rows[0]["TABLE_NAME"].ToString() + "] ";

                    var adapter = new OleDbDataAdapter(cmd);



                    adapter.Fill(dt);
                }
            }

            return dt;
        }
        catch (Exception e)
        {
            throw new Exception("ReadingExcel: Excel file could not be read! Check filepath.\n"
                + e.Message + e.StackTrace);

        }
    }

使用 C# 读取损坏的 excel

Reading corrupted excel using C#

c#

asp.net

excel

c#-4.0

oledbconnection