SQL返回错误计数以限制提交 [英] SQL returning incorrect count to limit submissions

问题描述

我有2张桌子。当按下按钮时，存储过程检查table1是否有某些数据，并将用户的IP和当前日期和时间记录到table2中。



在我的代码中，我正在尝试在最近30分钟内检查用户IP的每次出现都会检查table2（ReverseTransferConsent_Attempt）。



尽管我反复提交信息，但它只返回1。有什么想法吗？

I have 2 tables. When the button is pressed a stored procedure checks table1 for certain data and logs the user's IP and the current date and time into table2.

In my code below I am trying to check table2 (ReverseTransferConsent_Attempt) for every occurrence of the user's IP within the last 30 minutes.

It only ever returns 1 though despite me submitting the info repeatedly. Any ideas?

Protected Sub btn_Cont_Click(sender As Object, e As EventArgs) Handles btn_Cont.Click
    Dim StudentIDLast4 As Integer = Val(textSSN.Text)
    Dim StudentIDInst As String = textSID.Text.ToUpper
    Dim DateOfBirth As String = textDOB.Text
    Dim IPaddress As String = Request.UserHostAddress()

    Dim sqlConnection1 As New SqlConnection("Data Source=(localdb)\v11.0;Initial Catalog=tempdb;Integrated Security=True")
    Dim cmd As New SqlCommand
    Dim returnValue As String
    Dim returnCount As Integer

    cmd.CommandText = "proc_ReverseTransferConsent_Find_Match"
    cmd.CommandType = CommandType.StoredProcedure
    cmd.Parameters.AddWithValue("@StudentIDLast4", StudentIDLast4)
    cmd.Parameters.AddWithValue("@StudentIDInst", StudentIDInst)
    cmd.Parameters.AddWithValue("@DateOfBirth", DateOfBirth)
    cmd.Parameters.AddWithValue("@IPaddress", IPaddress)

    cmd.Connection = sqlConnection1

    ' code for the IP/time submission count
    Dim sqlConnection2 As New SqlConnection("Data Source=(localdb)\v11.0;Initial Catalog=tempdb;Integrated Security=True")
    Dim attempts As String
    Dim comm As New SqlCommand("SELECT [Count] = COUNT(*) FROM ReverseTransferConsent_Attempt WHERE IPaddress = @IPaddress AND CreatedDate > DATEADD(MINUTE, -30, GETDATE())", sqlConnection1)
    Dim ap As New SqlDataAdapter(comm)
    Dim ds As New DataSet()
    comm.Parameters.AddWithValue("@IPaddress", IPaddress)

    If Page.IsValid Then
        ' open connection2 and get count
        sqlConnection2.Open()
        ap.Fill(ds)
        attempts = ds.Tables(0).Rows.Count.ToString()
        sqlConnection2.Close()
        Label1.Text = attempts

        sqlConnection1.Open()
        returnValue = Convert.ToString(cmd.ExecuteScalar())
        sqlConnection1.Close()
        returnCount = returnValue.Length
        If attempts <= 5 Then
            If returnCount > 4 Then
                Response.Redirect("RTAgreement.aspx?rVal=" + returnValue)
            Else
                Label2.Text = "We could not find your information in our database."
            End If
        ElseIf attempts > 5 Then
            Label2.Text = "Only 5 submission attempts allowed per 30 minutes"
        End If
    End If
End Sub

推荐答案

我修好了。



我使用的是executeScalar而不是计算数据集：

I fixed it.

I used executeScalar instead of counting in a dataset:

Dim sqlConnection2 As New SqlConnection("Data Source=(localdb)\v11.0;Initial Catalog=tempdb;Integrated Security=True")
        Dim attempts As String
        Dim comm As New SqlCommand("SELECT [Count] = COUNT(*) FROM ReverseTransferConsent_Attempt WHERE IPaddress = @IPaddress AND CreatedDate > DATEADD(MINUTE, -30, GETDATE())", sqlConnection1)
        comm.Parameters.AddWithValue("@IPaddress", IPaddress)

        comm.Connection = sqlConnection2

        If Page.IsValid Then

            sqlConnection2.Open()
            attempts = Convert.ToString(comm.ExecuteScalar())
            sqlConnection2.Close()
            Label1.Text = attempts

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