使用 OLEDB 和 C# 读取 excel 的所有行时出现问题

Question

我正在开发一个使用 C# 语言导入 excel 电子表格的程序，使用 OLEDB 组件，当导入具有 100547 行的电子表格时，该程序只能读取 54046。遵循源代码：

   public class ReadExcel
{

    public string ConnectionExcel(ExcelUpload excelUpload)
    {
        //connection String for xls file format.
        if (excelUpload.fileExtension == ".xls")
        {
            excelUpload.excelConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + excelUpload.fileLocation + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
        }
        //connection String for xlsx file format.
        else if (excelUpload.fileExtension == ".xlsx")
        {
            excelUpload.excelConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + excelUpload.fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
        }else
        {
            excelUpload.excelConnectionString = "";
        }
        return excelUpload.excelConnectionString;
    }

    public DataTable readArqExcel(string excelConnectionString, DataSet ds)
    {
        //Create Connection to Excel work book and add oledb namespace
        OleDbConnection excelConnection = new OleDbConnection(excelConnectionString);
        excelConnection.Open();
        DataTable dt = new DataTable();

        dt = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
        if (dt == null)
        {
            return null;
        }

        //Numero de planilhas contidas no excel
        String[] excelSheets = new String[dt.Rows.Count];
        int count = 0;

        //excel data saves in temp file here.
        foreach (DataRow row in dt.Rows)
        {
            excelSheets[count] = row["TABLE_NAME"].ToString();
            count++;
        }

        OleDbConnection excelConnection1 = new OleDbConnection(excelConnectionString);
        string query = string.Format("Select * from [{0}]", excelSheets[0]);
        using (OleDbDataAdapter dataAdapter = new OleDbDataAdapter(query, excelConnection1))
        {
            dataAdapter.Fill(ds);
        }

        excelConnection.Close();

        return ds.Tables[0];
    }

我测试了 IIS 8（远程服务器）和 IIS Express（Visual Studio 本地服务器），我注意到在 IIS Express 服务器上代码运行完美，但在 IIS 8 中代码最终读取文件减半。是某种网络服务器配置吗？

Answer 1

问题已解决，我用 MsExcel 更改了连接 OLEBD 的字符串。修改参数 IMEX = 2 为 IMEX = 1，如下

if (excelUpload.fileExtension == ".xls")
        {
            excelUpload.excelConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + excelUpload.fileLocation + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"";
        }
        //connection String for xlsx file format.
        else if (excelUpload.fileExtension == ".xlsx")
        {
            excelUpload.excelConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + excelUpload.fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=1\"";
        }

使用 OLEDB 和 C# 读取 excel 的所有行时出现问题

Problems reading all the lines of an excel with OLEDB and C#

c#

iis

oledb

oledbdataadapter

iis-8