OleDbConnection的執行commad查詢錯誤vb.net

我使用VS2012 WPF應用程序vb.net MS Access 2010中我特林通過oledbconnection執行查詢，它是返回一個錯誤，但是當我通過MS訪問執行相同的查詢它返回表沒有任何問題。哪裏不對？OleDbConnection的執行commad查詢錯誤vb.net

查詢：

SELECT Agents.[PF], Agents.[User_ID], Agents.[First_Name], Agents.[Second_Name], Agents.[Third_Name], Agents.[Family_Name], Agents.[Gender], Agents.[Contract_Type], Agents.Area, Teams.Team_Name, Agents.Hiring_Date, Resignation_Pool.Resignation_Date, Resignation_Pool.Effective_Date, Replace(IIf(Skills.Skill_Directory Is Null,'','Directory, ')+IIf(Skills.Skill_TRC Is Null,'','TRC, ')+IIf(Skills.Skill_Prepaid Is Null,'','Prepaid, ')+IIf(Skills.Skill_Postpaid Is Null,'','Postpaid, ')+IIf(Skills.Skill_KeyAccount Is Null,'','KeyAccount, ')+IIf(Skills.Skill_Blackberry Is Null,'','Blackberry, ')+IIf(Skills.Skill_Broadband Is Null,'','Broadband, ')+IIf(Skills.Skill_Concierge Is Null,'','Concierge, ')+IIf(Skills.Skill_ISP Is Null,'','ISP, ')+IIf(Skills.Skill_Mada Is Null,'','Mada, ')+IIf(Skills.Skill_CSCS Is Null,'','CSCS, ')+'$',', $','') AS Skills FROM ((Agents INNER JOIN Resignation_Pool ON Agents.PF = Resignation_Pool.PF) LEFT JOIN Teams ON Agents.Team = Teams.ID) LEFT JOIN Skills ON Agents.PF = Skills.PF WHERE Agents.Contract_Status = 'Active'

錯誤：

Fill: SelectCommand.Connection property has not been initialized.

代碼：

  Dim SQL10 As New OleDb.OleDbCommand("SELECT Agents.[PF], Agents.[User_ID], Agents.[First_Name], Agents.[Second_Name], Agents.[Third_Name], Agents.[Family_Name], Agents.[Gender], Agents.[Contract_Type], Agents.Area, Teams.Team_Name, Agents.Hiring_Date, Resignation_Pool.Resignation_Date, Resignation_Pool.Effective_Date, " & Sql & " FROM ((Agents INNER JOIN Resignation_Pool ON Agents.PF = Resignation_Pool.PF) LEFT JOIN Teams ON Agents.Team = Teams.ID) LEFT JOIN Skills ON Agents.PF = Skills.PF WHERE Agents.Contract_Status = 'Active'") 
      Dim DataAdapter10 As New OleDb.OleDbDataAdapter(SQL10) 
      Dim DataTable10 As New DataTable() 
      DataAdapter10.Fill(DataTable10)

來源

2013-03-11 KaZzA

的問題不在於你的查詢，但與沒有正確設置你的連接你的'Command'對象。仔細閱讀錯誤'：）' – 2013-03-11 11:24:01

請你告訴我們你對你如何調用查詢代碼？ – wizzardz 2013-03-11 11:28:26

檢查我編輯的命令Q – KaZzA 2013-03-11 11:28:55

該錯誤消息說，你OleDbDataAda PTER有一個有效的連接相關聯而不是它的SelectCommand。因此，你應該嘗試改變你的代碼是這樣的

Using OleDbConnection connection = new OleDbConnection("your_connection_string") 
     connection.Open 
     Dim SQL10 As New OleDb.OleDbCommand("......", connection) ' add this to the OleDbCommand' 
     Dim DataAdapter10 As New OleDb.OleDbDataAdapter(SQL10) 
     Dim DataTable10 As New DataTable() 
     DataAdapter10.Fill(DataTable10) 
    End Using

來源

2013-03-11 11:57:06 Steve

謝謝我知道我錯過了一些東西，感謝您的幫助：D – KaZzA 2013-03-11 12:00:03

我的榮譽轉到@JW誰立即發現了這個問題 – Steve 2013-03-11 12:03:45

OleDbConnection的執行commad查詢錯誤vb.net

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