查询表达式中的C＃VS2005语法错误（缺少运算符）

Question

我正在使用VS2005 C＃和SQL Server2005。我目前正在将.CSV excel文件数据导入到SQL Server数据库中。

我遇到一些错误，我认为这与我的sql语句有关。 下面是我的代码：

protected void Button1_Click(object sender, EventArgs e)
    {
        if (FileUpload1.HasFile)
        {
            // Get the name of the Excel spreadsheet to upload. 
            string strFileName = Server.HtmlEncode(FileUpload1.FileName);

            // Get the extension of the Excel spreadsheet. 
            string strExtension = Path.GetExtension(strFileName);

            // Validate the file extension. 
            if (strExtension != ".xls" && strExtension != ".xlsx" && strExtension != ".csv" && strExtension != ".csv")
            {
                Response.Write("<script>alert('Failed to import DEM Conflicting Role Datasheet. Cause: Invalid Excel file.');</script>");
                return;
            }

            // Generate the file name to save. 
            string dir = @"C:\Documents and Settings\rhlim\My Documents\Visual Studio 2005\WebSites\SoD\UploadFiles\";
            string mycsv = DateTime.Now.ToString("yyyyMMddHHmmss") + strExtension;
            // Save the Excel spreadsheet on server. 
            FileUpload1.SaveAs(dir+mycsv);

            // Create Connection to Excel Workbook
            string connStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + dir + ";Extended Properties=Text;";
            using (OleDbConnection ExcelConnection = new OleDbConnection(connStr))
            {
                OleDbCommand ExcelCommand = new OleDbCommand("SELECT [TABLES] FROM" + mycsv, ExcelConnection);

            OleDbDataAdapter ExcelAdapter = new OleDbDataAdapter(ExcelCommand);

            ExcelConnection.Open();

            using (DbDataReader dr = ExcelCommand.ExecuteReader())
            {
                // SQL Server Connection String
                string sqlConnectionString = "Data Source=<IP>;Initial Catalog=<DB>;User ID=<UID>;Password=<PW>";

                // Bulk Copy to SQL Server
                using (SqlBulkCopy bulkCopy =
                           new SqlBulkCopy(sqlConnectionString))
                {
                    bulkCopy.DestinationTableName = "DEMUserRoles";
                    bulkCopy.WriteToServer(dr);
                    Response.Write("<script>alert('DEM User Data imported');</script>");

                }
            }
            }
        }
        else Response.Write("<script>alert('Failed to import DEM User Roles Data. Cause: No file found.');</script>");
    }

我收到错误

“查询表达式“ [说明] FROM20111109164041.csv”中的语法错误（缺少运算符）。

使用（DbDataReader dr = ExcelCommand.ExecuteReader（））执行时。 说明是数据库中的最后一列。

有人知道我的代码有什么问题吗？ 谢谢

Answer 1

您需要在FROM和csv文件之间留一个空格！ :)

OleDbCommand ExcelCommand = new OleDbCommand("SELECT [TABLES] FROM " + mycsv, ExcelConnection);

这就是为什么我总是使用string.Format方法的原因，您会更好地看到最终字符串的外观：

OleDbCommand ExcelCommand = new OleDbCommand(string.Format("SELECT [TABLES] FROM {0}",mycsv), ExcelConnection);

Answer 2

似乎您需要在FROM和CSV文件之间放置一个空格：“ [Description] FROM 20111109164041.csv”

Answer 3

如果要添加字符串，则应将其放在单引号之间

OleDbDataAdapter da = new OleDbDataAdapter("select * , '" + tempUid + "' as [UID] from [" + sheet1 + "]", conn);