Question

我有以下代码（Windows窗体的一部分），它在我的机器上成功连接到Excel文件，但在另一个盒子上失败。

var fd = new OpenFileDialog();
if (fd.ShowDialog() == DialogResult.OK)
{
    var extendedProperties = string.Empty;
    if (fd.FileName.Contains(".xlsx"))
    {
        // excel 2007 xml format file, IMEX = import data as text avoids data conversion errors
        extendedProperties = "Excel 12.0 Xml;IMEX=1";
    }
    else if (fd.FileName.Contains(".xls"))
    {
        // excel 2003 format file, IMEX: import data as text avoids data conversion errors
        extendedProperties = "Excel 8.0;IMEX=1";
    }

    var connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source='" + fd.FileName + "';Extended Properties='" + extendedProperties + "'";
    using (var objXConn = new OleDbConnection(connectionString))
    {
        objXConn.Open();

        var selectStatement = string.Format("SELECT * FROM [tabName$] WHERE FormType IS NOT NULL");
        var dataTable = new DataTable("test");
        using (var objCommand = new OleDbCommand(selectStatement, objXConn))
        {
            var dataReader = objCommand.ExecuteReader();
            if (dataReader != null)
            {
                dataTable.Load(dataReader);
            }
        }
        using (var stringWriter = new StringWriter())
        {
            dataTable.WriteXml(stringWriter);
            this.textBox1.Text = stringWriter.ToString();
        }
    }
}

使用OleDbDataAdapter而不是OleDbCommand.ExecuteReader()可以重现此行为。

using (var dataAdapter = new OleDbDataAdapter(selectStatement, objXConn))
{
    dataAdapter.Fill(dataTable);
}

失败，我的意思是在dataTable.Load(dataReader);

行上发生以下错误

使用x86配置运行/构建程序时，出现以下错误。

System.Data.OleDb.OleDbException (0x80004005): Unknown
   at System.Data.OleDb.OleDbDataReader.ProcessResults(OleDbHResult hr)
   at System.Data.OleDb.OleDbDataReader.GetRowHandles()
   at System.Data.OleDb.OleDbDataReader.ReadRowset()
   at System.Data.OleDb.OleDbDataReader.Read()
   at System.Data.Common.DataAdapter.FillLoadDataRow(SchemaMapping mapping)
   at System.Data.Common.DataAdapter.FillFromReader(DataSet dataset, DataTable datatable, String srcTable, DataReaderContainer dataReader, Int32 startRecord, Int32 maxRecords, DataColumn parentChapterColumn, Object parentChapterValue)
   at System.Data.Common.DataAdapter.Fill(DataTable[] dataTables, IDataReader dataReader, Int32 startRecord, Int32 maxRecords)
   at System.Data.Common.LoadAdapter.FillFromReader(DataTable[] dataTables, IDataReader dataReader, Int32 startRecord, Int32 maxRecords)
   at System.Data.DataTable.Load(IDataReader reader, LoadOption loadOption, FillErrorEventHandler errorHandler)
   at ExcelTest.Form1.button1_Click(Object sender, EventArgs e)
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

使用AnyCPU / x64配置运行/构建程序时，我在两台计算机上都出现以下错误。

System.InvalidOperationException: The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine.
   at System.Data.OleDb.OleDbServicesWrapper.GetDataSource(OleDbConnectionString constr, DataSourceWrapper& datasrcWrapper)
   at System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection)
   at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject)
   at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionInternal.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
   at System.Data.OleDb.OleDbConnection.Open()
   at ExcelTest.Form1.button1_Click(Object sender, EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

用于测试的Excel文件是两台计算机上的同一文件。我已经能够使用多个文件（.xls和.xlsx）重现该问题。

我已尝试过以下方法来解决问题。

安装'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine
将项目配置为x86 / x64
卸载并重新安装2007 Office System Driver: Data Connectivity Components
卸载并重新安装Microsoft Access Database Engine 2010 Redistributable

我可以采取哪些其他措施来解决问题或解决此问题？

Answer 1

对于第一个问题，请使用OleDbDataAdapter和Fill()方法或Update()。

        DataTable newTbl = new DataTable()
        using(OleDbDataAdapter ad = new OleDbDataAdapter(
            @"SELECT * FROM [tabName$] WHERE FormType IS NOT NULL", objXConn))
        {
           OleDbCommandBuilder builder = new OleDbCommandBuilder(ad);

           builder.QuotePrefix = "[";
           builder.QuoteSuffix = "]";

           // Saves the data set
           ad.Update(newTbl);
        }

32位和64位应用的OLEDB驱动程序不同。

如果您只安装了32位驱动程序，那么64位应用程序尝试使用它将收到此错误：Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine。同样，如果您只安装了64位版本并且32位应用程序尝试使用它，则会出现此错误。

要了解发生了什么，您应该检查您的申请是什么。我认为这一行可以提供帮助：Environment.Is64BitProcess

如果xls（Excel 2003）文件出现问题，请尝试使用JET连接字符串！

修改以下是drivers：

的链接

OleDbException（0x80004005）：未知

1 个答案: