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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

因此，问题似乎很明显，问题在于 SQL 子句中的文件名中有空格；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了解到表名不能是参数。有没有人有什么建议？TIA。

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3 回答 3

7

Thank you for the feedback, DJ KRAZE, it helped me to get thinking about the problem in different ways. It turns out that I simply had to add square brackets around the table name if it has spaces in the name, though it had to be only the file name and not the full path:

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

See [] brackets in sql statements for more details.

于 2013-01-21T20:27:45.933 回答
1

Roger try changing your connection string to look something like this

string fileName = SourceFile;   
string sConnectionString = string.Format(@"Provider=Microsoft.Jet.OLEDB.4.0; Data Source={0}; " + "Extended Properties=\"text;HDR=YES;FMT=TabDelimited;\"", fileName);

for the file path and name D:\Workspace\WoldCard export.csv

you can do one of 2 things add an UnderScore in the file name

D:\Workspace\WoldCard_export.csv or add double quotes around the file name

@"D:\Workspace\" + "WoldCard export.csv"; look also at the Path.Combine Method too

when you are trying to add Parameters look at using

Parameters.AddWithValues(@paramname, paramvalue) method as well

于 2013-01-21T19:19:13.233 回答
0

You have to use [] brackets. File names or table names with spaces, dashes (-), reserved words, etc... are not ok, to use them in square brackets.

More info: See: https://msdn.microsoft.com/en-us/library/ms175874.aspx

于 2016-01-27T08:19:12.143 回答