我一直在掙扎着過去的幾個小時,仍然無法讓我的頭繞過這一個。我遇到的問題是,當有人被錄取數據庫更新給他們BedID時,當我嘗試並解除他們時,我似乎無法將BedID(在數據庫中)設置爲無。這是一個問題,因爲我需要能夠儘可能多地接納和解僱。運算符'='沒有爲類型'DBNull'定義,而是類型'整數'
Sub Dis1_Click(ByVal s As Object, ByVal e As EventArgs) Handles Dis1.ServerClick
Dim time As String = Now().ToString("dd-MM-yyyy hh:mm:ss")
sql = "UPDATE Allocation SET BedID = NULL , DischargeDate =" + "'" + time + "'" + " WHERE BedID = 1 "
cmd = New OdbcCommand(sql, cn)
cmd.ExecuteNonQuery()
End Sub
Sub BedCheck1()
If r("BedID") = "" Then
Else
If r("BedID") = 1 Then
ba = s & "<tr><td>" & r("Surname") & "</td>" & "<td>" & r("Forename") & "/<td>" & "<td>" & r("AdmitDate") & "</td>" & "<td>" & r("DischargeDate") & "</td>" & "<td>" & r("comments") & "</td></tr>"
End If
End If
End Sub
謝謝!
是什麼異常的堆棧跟蹤? – Dai