.net - 具有 Entity Framework 的 Sqlite - 错误 : "Specified cast is not valid"

Question

字段类型是金钱，如果我在字段中输入“0”或“1”，则会收到此错误:

System.Reflection.TargetInvocationException:

Exception has been thrown by the target of an invocation. --->
System.InvalidCastException: Specified cast is not valid.

 at System.Data.SQLite.SQLiteDataReader.VerifyType(Int32 i, DbType typ)
 at System.Data.SQLite.SQLiteDataReader.GetBoolean(Int32 i)

 --- End of inner exception stack trace ---

这是来自模型设计师的:

<Property Name="Amount" Type="decimal" Precision="53" />  

====

    <EdmScalarPropertyAttribute(EntityKeyProperty:=False, IsNullable:=True)>
<DataMemberAttribute()>
Public Property Amount() As Nullable(Of Global.System.Decimal)
    Get
        Return _Amount
    End Get
    Set(ByVal value As Nullable(Of Global.System.Decimal))
        OnAmountChanging(Value)
        ReportPropertyChanging("Amount")
        _Amount = StructuralObject.SetValidValue(value)
        ReportPropertyChanged("Amount")
        OnAmountChanged()
    End Set
End Property

Private _Amount As Nullable(Of Global.System.Decimal)
Private Partial Sub OnAmountChanging(value As Nullable(Of Global.System.Decimal))
End Sub

Private Partial Sub OnAmountChanged()
End Sub

获取错误的代码:

 Dim Query = From c In EnData.Transactions Where c.TranID = 660 ' this tran is the amount 0

        For Each tran In Query 'Error here

        Next

Answer 1

我遇到了问题...不是金额字段。另一列是位类型，有时它不喜欢我写假或真的方式。这导致了问题。

解决方案是使用 1 表示 true，0 表示 false，这样总是可以的。