ASP.Net - 數學運算和百分比 - VB

Question

我有一個表，如下這些我與「合格」的「失敗」的記錄中的每一列的數量和填充。然後，我正在嘗試計算每個色譜柱的失敗率以及3'IR室'設備和3''員工退出'設備的平均故障率。

我使用的代碼在這個崗位的底部填充的標籤，但我有2個問題： -

1. 我得到一個「輸入字符串的不正確格式'錯誤 在線86（昏暗irAverageFailureRate作爲字符串）

2. 我不禁想到有一個更好的方式來做到這一點。我是 新的ASP/VB，所以任何關於如何改善這個問題的意見將是 感激地收到。

   Sub getYesterdayStats() 
   
   Dim con As OleDbConnection 
   Dim cmdClockings As OleDbDataAdapter 
   Dim dsClockings As New DataSet 
   Dim yesterday As String = DateTime.Today.AddDays(-1).ToString("yyyy/MM/dd") 
   
   
   con = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; DATA SOURCE=\\XXX.XX.XXX.XX\XXXX.mdb;Jet OLEDB:Database Password=XXXXX;") 
   cmdClockings = New OleDbDataAdapter("SELECT efrLog.PID, efrLog.LType, efrLog.LDName from efrLog WHERE LDate = '" & yesterday & "'", con) 
   
   cmdClockings.Fill(dsClockings, "Clockings") 
   
   ' Get pass and fail count for each device 
   Dim ir1Pass As Integer = dsClockings.Tables("Clockings").Select("LType = 'PASS' AND LDName = 'IR Room 1'").Count 
   Dim ir1Fail As Integer = dsClockings.Tables("Clockings").Select("LType = 'DENY' AND LDName = 'IR Room 1'").Count 
   Dim ir2Pass As Integer = dsClockings.Tables("Clockings").Select("LType = 'PASS' AND LDName = 'IR Room 2'").Count 
   Dim ir2Fail As Integer = dsClockings.Tables("Clockings").Select("LType = 'DENY' AND LDName = 'IR Room 2'").Count 
   Dim ir3Pass As Integer = dsClockings.Tables("Clockings").Select("LType = 'PASS' AND LDName = 'IR Room 3'").Count 
   Dim ir3Fail As Integer = dsClockings.Tables("Clockings").Select("LType = 'DENY' AND LDName = 'IR Room 3'").Count 
   Dim ee1Pass As Integer = dsClockings.Tables("Clockings").Select("LType = 'PASS' AND LDName = 'Employee Exit 1'").Count 
   Dim ee1Fail As Integer = dsClockings.Tables("Clockings").Select("LType = 'DENY' AND LDName = 'Employee Exit 1'").Count 
   Dim ee2Pass As Integer = dsClockings.Tables("Clockings").Select("LType = 'PASS' AND LDName = 'Employee Exit 2'").Count 
   Dim ee2Fail As Integer = dsClockings.Tables("Clockings").Select("LType = 'DENY' AND LDName = 'Employee Exit 2'").Count 
   Dim ee3Pass As Integer = dsClockings.Tables("Clockings").Select("LType = 'PASS' AND LDName = 'Employee Exit 3'").Count 
   Dim ee3Fail As Integer = dsClockings.Tables("Clockings").Select("LType = 'DENY' AND LDName = 'Employee Exit 3'").Count 
   
   ' Calculate totals for each device 
   Dim ir1total As Integer = ir1Pass + ir1Fail 
   Dim ir2total As Integer = ir2Pass + ir2Fail 
   Dim ir3total As Integer = ir3Pass + ir3Fail 
   Dim ee1total As Integer = ee1Pass + ee1Fail 
   Dim ee2total As Integer = ee2Pass + ee2Fail 
   Dim ee3total As Integer = ee3Pass + ee3Fail 
   
   ' Calcualte failure rate for each device 
   Dim ir1failureRate As String = Format((ir1Fail/ir1Pass) * 100, "0.00") 
   Dim ir2failureRate As String = Format((ir2Fail/ir2Pass) * 100, "0.00") 
   Dim ir3failureRate As String = Format((ir3Fail/ir3Pass) * 100, "0.00") 
   Dim ee1failureRate As String = Format((ee1Fail/ee1Pass) * 100, "0.00") 
   Dim ee2failureRate As String = Format((ee2Fail/ee2Pass) * 100, "0.00") 
   Dim ee3failureRate As String = Format((ee3Fail/ee3Pass) * 100, "0.00") 
   
   ' Calculate average failure rate for IR and EE devices 
   Dim irAverageFailureRate As String = Format((Format((ir1Fail/ir1Pass) * 100, "0.00") + Format((ir2Fail/ir2Pass) * 100, "0.00") + Format((ir3Fail/ir3Pass) * 100, "0.00"))/3, "0.00") 
   Dim eeAverageFailureRate As String = Format((Format((ee1Fail/ee1Pass) * 100, "0.00") + Format((ee2Fail/ee2Pass) * 100, "0.00") + Format((ee3Fail/ee3Pass) * 100, "0.00"))/3, "0.00") 
   
   ' Assign values to labels 
   lblIR1pass.Text = ir1Pass 
   lblIR1fail.Text = ir1Fail 
   lblIR2pass.Text = ir2Pass 
   lblIR2fail.Text = ir2Fail 
   lblIR3pass.Text = ir3Pass 
   lblIR3fail.Text = ir3Fail 
   lblEE1pass.Text = ee1Pass 
   lblEE1fail.Text = ee1Fail 
   lblEE2pass.Text = ee2Pass 
   lblEE2fail.Text = ee2Fail 
   lblEE3pass.Text = ee3Pass 
   lblEE3fail.Text = ee3Fail 
   lblIR1tot.Text = ir1total 
   lblIR2tot.Text = ir2total 
   lblIR3tot.Text = ir3total 
   lblEE1tot.Text = ee1total 
   lblEE2tot.Text = ee2total 
   lblEE3tot.Text = ee3total 
   lblIR1fr.Text = ir1failureRate & "%" 
   lblIR2fr.Text = ir2failureRate & "%" 
   lblIR3fr.Text = ir3failureRate & "%" 
   lblEE1fr.Text = ee1failureRate & "%" 
   lblEE2fr.Text = ee2failureRate & "%" 
   lblEE3fr.Text = ee3failureRate & "%" 
   lblIRafr.Text = irAverageFailureRate & "%" 
   lblEEafr.Text = eeAverageFailureRate & "%" 
   

   末次

Answer 1

有一個在該行很多不必要的格式。

Dim irAverageFailureRate As String = ((CDbl(ir1Fail)/ir1Pass) + (CDbl(ir2Fail)/ir2Pass) + (CDbl(ir3Fail)/ir3Pass)/3).ToString("P") 

我從Standard Numeric Format Strings得到百分比的「P」。