如何通过oledb在excel电子表格上运行的计数查询中添加参数？

Question

我正在尝试计算某个日期之前一列的值的数量。以下是我目前的尝试。没有where部分，我可以运行此问题，但是，当然需要返回正确的值。

1. string type =“ Beacon Comm”，这是工作表名称。
2. TargetBuildOledbConnection = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source='" + FTPYTracker + "';Extended Properties='Excel 12.0;HDR=YES;IMEX=1;';"
3. 字符串AssyColumn =“ F”或要搜索的任何列

4. DateTimeSelection =“ 03/01/2020 00:00:00”或来自日期选择器的数据采用相同格式。

   public double GetInProgressOledb(string type, OleDbConnection FTPYBuildOleDbConnection, string AssyColumn, DateTime Selection)
   {
       const string prodParamName = "@prod";
       double lastDayOfMonth = (new DateTime(Selection.Year, Selection.Month, 1).AddMonths(1).AddDays(-1)).ToOADate();
       using (OleDbCommand comm = new OleDbCommand())
       {
           comm.Connection = FTPYBuildOleDbConnection;
           comm.CommandText = string.Format(ci, "SELECT Count(*) FROM [" + type + "$" + AssyColumn + ":" + AssyColumn + "] WHERE [" + AssyColumn + "$] = #" + lastDayOfMonth + "#");
           //comm.Parameters.Add(prodParamName, OleDbType.VarChar);
           //comm.Parameters[prodParamName].Value = lastDayOfMonth;
           double rowCount = Convert.ToDouble((int)comm.ExecuteScalar());
           return rowCount;
       }
   }
   

Answer 1

尝试一下

comm.Parameters.AddWithValue("@prodParamName", OleDbType.VarChar).Value = lastDayOfMonth;