SubSonic 3 中的选角问题
VB 版本中保存具有整数主键的行时会引发以下异常： “未找到类型‘Decimal’的公共成员‘ChangeTypeTo’。”
这种情况发生在 ActiveRecord.VB 文件第 3406 行：
Public Sub SetKeyValue(value As Object) Implements IActiveRecord.SetKeyValue
If value IsNot Nothing AndAlso value IsNot DBNull.Value Then
Dim settable = value.ChangeTypeTo(Of Integer)()
我可以将最后一行更改为：
Dim settable = CInt(value) 'value.ChangeTypeTo(Of Integer)()
这将解决问题，直到我重新编译 .tt 文件。
我的问题是，如何在 ActiveRecord.tt 文件中更改此设置？ tt 文件中的代码如下所示：
Dim settable = value.ChangeTypeTo(Of <#=tbl.PK.SysType#>)()
感谢任何帮助。
谢谢
When saving a row that has a integere primary key following exception is thrown in the VB version:
'Public member 'ChangeTypeTo' on type 'Decimal' not found.'
This happens in ActiveRecord.VB file line 3406:
Public Sub SetKeyValue(value As Object) Implements IActiveRecord.SetKeyValue
If value IsNot Nothing AndAlso value IsNot DBNull.Value Then
Dim settable = value.ChangeTypeTo(Of Integer)()
I can change the last line to:
Dim settable = CInt(value) 'value.ChangeTypeTo(Of Integer)()
This will fix the problem until I recompile the .tt files.
My question is, how can I change this in the ActiveRecord.tt file?
The code in the tt file looks like this:
Dim settable = value.ChangeTypeTo(Of <#=tbl.PK.SysType#>)()
Any help is appreciated.
Thanks
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评论（2）
我还遇到了 VB 模板的各种问题。 Subsonic 开发人员的重点似乎是 C#。最后，我选择在另一个项目中使用 C# 模板，并从我的 VB 主应用程序中引用它。您尝试进行的更改的问题在于您试图将通用方法替换为具体方法，这并不是更好。
<#=tbl.PK.SysType#>引用主键的类型。如果您只有整数主键，则可以将模板编辑为Dim settable = CInt(value)。否则，您需要 GetType 来了解value的类型，然后使用select case为到达该方法的每种类型进行适当的转换。I also had have various issues with the VB templates. That seems the focus of the Subsonic developers is in C#. Finally I choose to use the C# templates in another project, and reference it from my VB main application. The problem with the change that you're trying to do is that you're trying to replace a generic method for a concrete one, this isn't the better.
<#=tbl.PK.SysType#>makes reference to the type of the primary key. If you only have integer primary keys, you can edit the template asDim settable = CInt(value). Otherwise you need GetType for know the type ofvalue, and then aselect casewith the apropiate conversion for each type that arrives to the method.生成的代码是正确的。您试图将十进制值转换为整数，这是没有意义的。在这种情况下，编辑模板不是解决方案，您需要修复应用程序的逻辑。
The code generated is correct. You're trying to cast a decimal value as integer, this makes no sense. To edit the templates isn't the solution in this case, you need fix the logic of your application.