如何解决 OleDb 错误“FROM 子句中的语法错误”？

Question

目前我正在尝试使用此功能导入 CSV 文件：

    public DataSet ImportCommaSeparatedValueFileToDataSet(string SourceFile)
    {
        var dsImportCSVtoDataSetReturn = new DataSet();

        using (var objAdapter1 = new OleDbDataAdapter())
        {
            String sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + SourceFile.Substring(0, SourceFile.LastIndexOf(@"\")) + ";Extended Properties='text;HDR=Yes;FMT=Delimited'";
            var objConnection = new OleDbConnection(sConnectionString);
            objConnection.Open();
            var objCmdSelect = new OleDbCommand("SELECT * FROM " + SourceFile, objConnection);

            objAdapter1.SelectCommand = objCmdSelect;
            objAdapter1.Fill(dsImportCSVtoDataSetReturn);
            objConnection.Close();
        }

        return dsImportCSVtoDataSetReturn;
    }

当我尝试导入文件名中没有空格的文件时，它工作正常。当我尝试导入以下文件时：

D:\Workspace\WoldCard export.csv

然后我收到以下异常：

excException = {"Syntax error in FROM clause."}

Source = "Microsoft JET Database Engine"

StackTrace  "   at System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr)\r\n   at System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult)\r\n   at System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult)\r\n   at System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult)\r\n   at System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method)\r\n   at System.Data.OleDb.OleDbCommand.ExecuteReader(CommandBehavior behavior)\r\n   at System.Data.OleDb.OleDbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior behavior)\r\n   at System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)\r\n   at System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)\r\n   at System.Data.Common.DbDataAdapter.Fill(DataSet dataSet)\r\n   at CommonObjects4.clsUtilityOffice.ImportCommaSeparatedValueFileToDataSet(String SourceFile) in D:\\DevProjects\\CommonObjects4\\classes\\clsUtilityOffice.cs:line 262" string

所以很明显问题是在 SQL 子句的文件名中有一个空格；但是，当我尝试使用单引号来解决问题时：

var objCmdSelect = new OleDbCommand("SELECT * FROM '" + SourceFile + "'", objConnection); 

然后我收到这个异常：

excException = {"''D:\Workspace\WoldCard export.csv'' is not a valid name.  Make sure that it does not include invalid characters or punctuation and that it is not too long."}

另外，当我尝试使用参数时：

var objCmdSelect = new OleDbCommand("SELECT * FROM @SourceFile", objConnection);
objCmdSelect.Parameters.Add("@SourceFile", SqlDbType.NVarChar).Value = SourceFile;

然后我收到这个异常：

excException = {"Syntax error in query.  Incomplete query clause."}

另外，我后来从http://social.msdn.microsoft.com/Forums/en-US/sqldataaccess/thread/1c399bf7-a6b3-47bb-8897-d4247b4938f0了解到表名不能作为参数。有没有人有什么建议？TIA。

Answer 1

感谢您的反馈，DJ KRAZE，它帮助我以不同的方式思考问题。事实证明，如果名称中有空格，我只需要在表名周围添加方括号，尽管它必须只是文件名而不是完整路径：

var objCmdSelect = new OleDbCommand("SELECT * FROM [" + SourceFile.Substring(SourceFile.LastIndexOf(@"\") + 1, SourceFile.Length - SourceFile.LastIndexOf(@"\") - 1) + "]", objConnection);

有关详细信息，请参阅sql 语句中的 [] 括号。