SQL Server参数查询无法返回结果

Question

I have an application in which I had to change the selection of a day be a range of days instead. The query when ran in Management Studio works and returns the correct results. However in the application nothing is returned.

Code:

SqlCommand com = new SqlCommand();
com.Connection = Program.ConnnectDatabase();
com.CommandText = Resources.FillProcessing;

string strDay = string.Empty;

if (cboProcessDay.Text.ToString().Trim() == "Monday")
    strDay = "'Monday'";

com.Parameters.Add(new SqlParameter("@Day", strDay));

DataTable dt = new DataTable();

SqlDataAdapter adt = new SqlDataAdapter();
adt.SelectCommand = com;

adt.Fill(dt);

SQL:

SELECT data.* 
FROM  Rec_data data, acc_info info 
WHERE Day IN (@Day) 
  AND info.foracid = data.foracid

Any idea what i am doing wrong?

Answer 1

我建议使用SQL事件探查器来跟踪实际上是从c＃运行的语句。