将参数化查询发送到数据库的方法更简单?

时间:2012-10-17 08:31:01

标签: c# .net vb.net visual-studio-2005 dbcommand

有没有办法用更少的行编写以下代码?执行这样一个简单的查询似乎有很多代码。没有LINQ因为我正在使用VS2005。 VB或C#中的答案都是可以接受的。

Using cmd As DbCommand = oDB.CreateCommand()
    cmd.CommandText = "SELECT * FROM [Table1] WHERE [Date] BETWEEN @Date1 AND @Date2"
    cmd.CommandTimeout = 30
    cmd.CommandType = CommandType.Text
    cmd.Connection = oDB
    Dim param As DbParameter
    param = cmd.CreateParameter()
    param.Direction = ParameterDirection.Input
    param.DbType = DbType.Date
    param.ParameterName = "@Date1"
    param.Value = Now().Date
    cmd.Parameters.Add(param)
    param = cmd.CreateParameter()
    param.Direction = ParameterDirection.Input
    param.DbType = DbType.Date
    param.ParameterName = "@Date2"
    param.Value = Now().Date.AddDays(intDaysAhead)
    cmd.Parameters.Add(param)
End Using
Dim reader As DbDataReader = cmd.ExecuteReader()

1 个答案:

答案 0 :(得分:2)

这些可能是你能得到的最少的一行:

Using con = New SqlConnection("Connectionstring")
    Using cmd = New SqlCommand("SELECT * FROM [Table1] WHERE [Date] BETWEEN @Date1 AND @Date2", con)
        cmd.CommandTimeout = 30
        cmd.Parameters.AddWithValue("@Date1", Date.Today)
        cmd.Parameters.AddWithValue("@Date2", Date.Today.AddDays(intDaysAhead))
        con.Open()
        Using reader = cmd.ExecuteReader()

        End Using
    End Using
End Using

(假设SqlClient但与其他数据提供者相似)