SQL Server :: Getting Error "An Expression Of Non - Boolean Type Specified In A Context Where A Condition Is Expected" When Retrieve Data

Sep 25, 2010

i am trying to retrieve data from sql database but I get this error: < An expression of non-boolean type specified in a context where a condition is expected, near ')'. > whats this error meaning?

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See the code

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Whats The wrong With This Code

Data type mismatch in criteria expression

Public Class Class1
Dim str As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Documents and SettingsMasterMindsMy DocumentsVisual Studio 2008ProjectsWebApplication1WebApplication1indb1.mdb"
Dim con As New OleDb.OleDbConnection(str)
Public Sub insert(ByVal Nationalty As String, ByVal NationalID As Single, ByVal StNameA As String, ByVal Gender As String, ByVal BirthDate As Date, ByVal Address As String, ByVal TawjehiAvg As Integer, ByVal alfera As String, ByVal Phone As Integer, ByVal
Specialization As String, ByVal Period As String)
If con.State = ConnectionState.Closed Then
End If
Dim adp As New OleDb.OleDbCommand("insert into stinfo values (" & getmaxid() & ",'" & Nationalty & "'," & NationalID & ",'" & StNameA & "','" & Gender & "','" & BirthDate & "','" & Address & "'," & TawjehiAvg & ",'" & alfera & "'," & Phone & ",'" &
Specialization & "','" & Period & "')", con)
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Dim z As Integer = 1
If con.State = ConnectionState.Closed Then
End If
Dim adp As New OleDb.OleDbCommand("select max(Stnum) from stinfo", con)
z = adp.ExecuteScalar
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Catch ex As Exception
Return z
End Try
End Function
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