在课堂上appsetting不起作用 [英] appsetting in class doesn't work

问题描述

这里是类代码片段

导入System.Configuration.ConfigurationManager


公共类Class1


Public _strTestSetting As String


Public Sub SetTestsetting（）

_strTestSetting = AppSettings.Get（" TestSetting"） - 应该得到价值

应用程序配置文件中的TestSetting


结束次级

结束班级


这是项目中调用类的项目片段--Project TestIt - 要进行
测试，你应该有一个名为TestSetting的设置应用范围，值

Testvalue


导入System.Configuration


公共类Form1


私有子Button1_Click（ByVal发送者为System.Object，ByVal e as

System.EventArgs）处理Button1.Click


Dim mycls As New clsTestconfig.Class1


mycls .SetTestsetting（）


Label1.Text = mycls._strTestSetting


结束子


结束班


项目Testit的设置文件中设置了TestSetting


在线设置断点


_strTestSetting = AppSettings.Get（" TestSetting"）


单击按钮，当您跨越断点时，您会看到_strTestSetting的

值保持不变。也就是说，它没有在app.config中获取TestSetting的价值

。


我怎样才能获得这个价值的提升？


感谢您的帮助


Bob

Here''s the class code snippet
Imports System.Configuration.ConfigurationManager

Public Class Class1

Public _strTestSetting As String

Public Sub SetTestsetting()

_strTestSetting = AppSettings.Get("TestSetting") -should get the value of
TestSetting in app config file

End Sub
End Class

This is the snippet in the project calling the class -Project TestIt - To
test you should have a setting named TestSetting application scope, value
Testvalue

Imports System.Configuration

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click

Dim mycls As New clsTestconfig.Class1

mycls.SetTestsetting()

Label1.Text = mycls._strTestSetting

End Sub

End Class

There''s a setting TestSetting in the settings file of the project Testit

Put a breakpoint on line

_strTestSetting = AppSettings.Get("TestSetting")

Click the button, you will see as you step over the breakpoint that the
value of _strTestSetting stays at nothing. ie, its not picking up the value
of TestSetting in app.config.

How can I get this pickup of the value to work?

Thanks for any help

Bob

推荐答案

罗伯特，这个是我第一次涉足.NET 2.0的配置系统和

这对我来说似乎非常困难但是这里我是如何获得你的

项目的价值的正试图检索。

首先是配置文件：


< appSettings>


< add key = QUOT; TestSetting" value =" TestValue" />


< / appSettings>


现在代码：


Dim s As String


Dim cnfg As System.Configuration.Configuration


Dim el As KeyValueConfigurationElement


cnfg =

System.Configuration.ConfigurationManager.OpenExeC onfiguration（ConfigurationUserLevel.None）


el = cnfg.AppSettings.Settings.Item （TestSetting）


s = el.Value.ToString（）


这确实会返回我拥有的值TestValue ;在配置

文件中。


HTH


S


PS在VS2003中似乎要容易得多


" Robert Dufour" < bd ***** @ sgiims.com写信息

新闻：eG ************** @ TK2MSFTNGP04.phx.gbl ...

Robert, this is my first foray into the configuration system of .NET 2.0 and
it seem ridiculously difficult to me but here''s how I got the value of the
item that you are trying to retrieve.
First the config file:

<appSettings>

<add key="TestSetting" value="TestValue"/>

</appSettings>

Now the code:

Dim s As String

Dim cnfg As System.Configuration.Configuration

Dim el As KeyValueConfigurationElement

cnfg =
System.Configuration.ConfigurationManager.OpenExeC onfiguration(ConfigurationUserLevel.None)

el = cnfg.AppSettings.Settings.Item("TestSetting")

s = el.Value.ToString()

This does indeed return the value that I have "TestValue" in the config
file.

HTH

S

P.S. It seems much easier in VS2003

"Robert Dufour" <bd*****@sgiims.comwrote in message
news:eG**************@TK2MSFTNGP04.phx.gbl...

这里是类代码片段

Imports System.Configuration.ConfigurationManager


公共类Class1


Public _strTestSetting As String


Public Sub SetTestsetting（）

_strTestSetting = AppSettings。获取（TestSetting） - 应该获得值

appSetting in app config file


End Sub


结束类


这是项目中调用类的项目片段--Project TestIt - 要进行
测试，你应该有一个名为TestSetting应用程序范围的设置，价值

Testvalue


进口System.Configuration


公共舱Form1


Private Sub Button1_Click（ByVal sender As System.Object，ByVal e As

System.EventArgs）处理Button1.Click


Dim mycls As New clsTestconfig.Class1


mycls.SetTestsetting（）


Label1.Text = mycls._strTestSetting

结束次级


结束班级


在项目Testit的设置文件中设置TestSetting


在线设置断点


_strTestSetting = AppSettings.Get（" TestSetting"）


点击按钮，当你跨过断点时，你会看到_strTestSetting的

值保持不变。也就是说，它没有在app.config中获取TestSetting的

值。


如何才能获得该值的提升？


感谢您的帮助


Bob

Here''s the class code snippet
Imports System.Configuration.ConfigurationManager

Public Class Class1

Public _strTestSetting As String

Public Sub SetTestsetting()

_strTestSetting = AppSettings.Get("TestSetting") -should get the value of
TestSetting in app config file

End Sub
End Class

This is the snippet in the project calling the class -Project TestIt - To
test you should have a setting named TestSetting application scope, value
Testvalue

Imports System.Configuration

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click

Dim mycls As New clsTestconfig.Class1

mycls.SetTestsetting()

Label1.Text = mycls._strTestSetting

End Sub

End Class

There''s a setting TestSetting in the settings file of the project Testit

Put a breakpoint on line

_strTestSetting = AppSettings.Get("TestSetting")

Click the button, you will see as you step over the breakpoint that the
value of _strTestSetting stays at nothing. ie, its not picking up the
value of TestSetting in app.config.

How can I get this pickup of the value to work?

Thanks for any help

Bob

谢谢史蒂夫我要测试一下，是的，为什么当你这么简单的时候让事情变得简单？
可以让它们复杂化:-(


鲍勃


Steve Long< St ********** @ NoSpam.com写信息

news：es *** *********** @ TK2MSFTNGP06.phx.gbl ...

Thanks Steve I''m gonna test it out and yes, why make things simple when you
can make them complicated :-(

Bob

"Steve Long" <St**********@NoSpam.comwrote in message
news:es**************@TK2MSFTNGP06.phx.gbl...

Robert，这是我第一次涉足.NET的配置系统2.0

对我来说这看起来非常困难但是这里我是如何获得你想要检索的物品的价值

。

首先是配置文件：


< appSettings>

< add key =" TestSetting" value =" TestValue" />


< / appSetting s>


现在代码：


Dim s As String


Dim cnfg As System .Configuration.Configuration


Dim el As KeyValueConfigurationElement

cnfg =

System.Configuration.ConfigurationManager.OpenExeC onfiguration （ConfigurationUserLevel.None）


el = cnfg.AppSettings.Settings.Item（" TestSetting"）

s = el.Value.ToString （）


这确实返回了我拥有的值TestValue在配置

文件中。


HTH


S


PS在VS2003中似乎要容易得多


" Robert Dufour" < bd ***** @ sgiims.com写信息

新闻：eG ************** @ TK2MSFTNGP04.phx.gbl ...

Robert, this is my first foray into the configuration system of .NET 2.0
and it seem ridiculously difficult to me but here''s how I got the value of
the item that you are trying to retrieve.
First the config file:

<appSettings>

<add key="TestSetting" value="TestValue"/>

</appSettings>

Now the code:

Dim s As String

Dim cnfg As System.Configuration.Configuration

Dim el As KeyValueConfigurationElement

cnfg =
System.Configuration.ConfigurationManager.OpenExeC onfiguration(ConfigurationUserLevel.None)

el = cnfg.AppSettings.Settings.Item("TestSetting")

s = el.Value.ToString()

This does indeed return the value that I have "TestValue" in the config
file.

HTH

S

P.S. It seems much easier in VS2003

"Robert Dufour" <bd*****@sgiims.comwrote in message
news:eG**************@TK2MSFTNGP04.phx.gbl...

>这里是类代码片段
Imports System.Configuration.ConfigurationManager

Public Class Class1
<公共_strTestSetting As String

公共子SetTestsetting（）
_strTestSetting = AppSettings.Get（" TestSetting"） - 应该得到值
TestSetting在应用程序配置文件中

结束子

结束类

这是调用类的项目片段--Project TestIt - To
测试你应该有一个名为TestSetting的设置应用范围，值
Testvalue

Imports System.Configuration

公共类Form1

私人Sub Button1_Click（ByVal sender As System.Object，ByVal e As
System.EventArgs）处理Button1.Click

Dim mycls As new clsTestconfig.Class1
mycls。 SetTestsetting（）

Label1.T ext = mycls._strTestSetting

End Sub

结束类

在项目Testit的设置文件中设置TestSetting
在线设置断点

_strTestSetting = AppSettings.Get（" TestSetting"）

点击按钮，当你跳过断点时，你会看到_strTestSetting的
值保持不变。也就是说，它没有在app.config中获取TestSetting的值。

我怎样才能获得价值的提升？

感谢任何人帮助

鲍勃

>Here''s the class code snippet
Imports System.Configuration.ConfigurationManager

Public Class Class1

Public _strTestSetting As String

Public Sub SetTestsetting()

_strTestSetting = AppSettings.Get("TestSetting") -should get the value of
TestSetting in app config file

End Sub
End Class

This is the snippet in the project calling the class -Project TestIt - To
test you should have a setting named TestSetting application scope, value
Testvalue

Imports System.Configuration

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click

Dim mycls As New clsTestconfig.Class1

mycls.SetTestsetting()

Label1.Text = mycls._strTestSetting

End Sub

End Class

There''s a setting TestSetting in the settings file of the project Testit

Put a breakpoint on line

_strTestSetting = AppSettings.Get("TestSetting")

Click the button, you will see as you step over the breakpoint that the
value of _strTestSetting stays at nothing. ie, its not picking up the
value of TestSetting in app.config.

How can I get this pickup of the value to work?

Thanks for any help

Bob

嗨史蒂夫，

运行时我在线上收到未处理的异常错误

s = el.Value.ToString（）对象引用未设置为
$的实例b $ b对象。多数民众赞成因为行了

el = cnfg.AppSettings.Settings.Item（" TestSetting"）

el什么都不做，这无疑是因为我的app.config文件正在使用

由VS2005中的设置设计器生成的新格式，后面是

。


< ; applicationSettings>


< TestClassApConfig.My.MySettings>


< setting name =" TestSetting" serializeAs =" String">


< value> Testvalue< / value>


< / setting>


< /TestClassApConfig.My.MySettings>


< / applicationSettings>


确实当我使用旧式app.config文件测试它

< appSettings>

< add key =" TestSetting" value =" TestValue" />

< / appSettings>

代码工作正常。

现在的问题是，怎么做当你使用VS2005的内置工具创建你的应用程序配置文件时，你检索TestSetting值 - 使用add item-new item创建一个

新的app.config文件 - 应用程序配置和

将应用程序范围设置放在文件中，使用Myproject -

设置在IDE中进行开发时写入设置。


感谢您的帮助，


Bob



" Steve Long" < St ********** @ NoSpam.comwrote in message

news：es ************** @ TK2MSFTNGP06.phx.gbl ...

Hi steve,
When running it I''m getting an unhandled exception error on line
s = el.Value.ToString() Object reference not set to an instance of an
object. Thats because with the line
el = cnfg.AppSettings.Settings.Item("TestSetting")

el stays at nothing and thats no doubt because my app.config file is using
the new format generated by the settings designer in VS2005 which is as
follows.

<applicationSettings>

<TestClassApConfig.My.MySettings>

<setting name="TestSetting" serializeAs="String">

<value>Testvalue</value>

</setting>

</TestClassApConfig.My.MySettings>

</applicationSettings>

And indeed when I tested it using the old style app.config file
<appSettings>
<add key="TestSetting" value="TestValue"/>
</appSettings>
the code works fine.
The question now becomes, how do you retrieve the TestSetting value when you
created your app config file using the built in tools of VS2005 - creating a
new app.config file with add item-new item- application configuration and
putting application scope settings in the file by using the Myproject -
settings to write settings while developping in the IDE.

Thanks for your help,

Bob


"Steve Long" <St**********@NoSpam.comwrote in message
news:es**************@TK2MSFTNGP06.phx.gbl...

罗伯特，这是我第一次涉足.NET 2.0的配置系统

，这对我来说似乎非常困难但是这是我如何获得你想要检索的项目的价值

。

首先是配置文件：


< appSettings>


< add key =" TestSetting" value =" TestValue" />


< / appSettings>


现在代码：


Dim s As String


Dim cnfg As System.Configuration.Configuration


Dim el As KeyValueConfigurationElement


cnfg =

System.Configuration.ConfigurationManager.OpenExeC onfiguration（ConfigurationUserLevel.None）


el = cnfg.AppSettings.Settings.Item （TestSetting）


s = el.Value.ToString（）


这确实会返回我拥有的值TestValue ;在配置

文件中。


HTH


S


PS在VS2003中似乎要容易得多


" Robert Dufour" < bd ***** @ sgiims.com写信息

新闻：eG ************** @ TK2MSFTNGP04.phx.gbl ...

Robert, this is my first foray into the configuration system of .NET 2.0
and it seem ridiculously difficult to me but here''s how I got the value of
the item that you are trying to retrieve.
First the config file:

<appSettings>

<add key="TestSetting" value="TestValue"/>

</appSettings>

Now the code:

Dim s As String

Dim cnfg As System.Configuration.Configuration

Dim el As KeyValueConfigurationElement

cnfg =
System.Configuration.ConfigurationManager.OpenExeC onfiguration(ConfigurationUserLevel.None)

el = cnfg.AppSettings.Settings.Item("TestSetting")

s = el.Value.ToString()

This does indeed return the value that I have "TestValue" in the config
file.

HTH

S

P.S. It seems much easier in VS2003

"Robert Dufour" <bd*****@sgiims.comwrote in message
news:eG**************@TK2MSFTNGP04.phx.gbl...

>这里是类代码片段
Imports System.Configuration.ConfigurationManager

Public Class Class1
<公共_strTestSetting As String

公共子SetTestsetting（）
_strTestSetting = AppSettings.Get（" TestSetting"） - 应该得到值
TestSetting在应用程序配置文件中

结束子

结束类

这是调用类的项目片段--Project TestIt - To
测试你应该有一个名为TestSetting的设置应用范围，值
Testvalue

Imports System.Configuration

公共类Form1

私人Sub Button1_Click（ByVal sender As System.Object，ByVal e As
System.EventArgs）处理Button1.Click

Dim mycls As new clsTestconfig.Class1
mycls。 SetTestsetting（）

Label1.T ext = mycls._strTestSetting

End Sub

结束类

在项目Testit的设置文件中设置TestSetting
在线设置断点

_strTestSetting = AppSettings.Get（" TestSetting"）

点击按钮，当你跳过断点时，你会看到_strTestSetting的
值保持不变。也就是说，它没有在app.config中获取TestSetting的值。

我怎样才能获得价值的提升？

感谢任何人帮助

Bob

>Here''s the class code snippet
Imports System.Configuration.ConfigurationManager

Public Class Class1

Public _strTestSetting As String

Public Sub SetTestsetting()

_strTestSetting = AppSettings.Get("TestSetting") -should get the value of
TestSetting in app config file

End Sub
End Class

This is the snippet in the project calling the class -Project TestIt - To
test you should have a setting named TestSetting application scope, value
Testvalue

Imports System.Configuration

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click

Dim mycls As New clsTestconfig.Class1

mycls.SetTestsetting()

Label1.Text = mycls._strTestSetting

End Sub

End Class

There''s a setting TestSetting in the settings file of the project Testit

Put a breakpoint on line

_strTestSetting = AppSettings.Get("TestSetting")

Click the button, you will see as you step over the breakpoint that the
value of _strTestSetting stays at nothing. ie, its not picking up the
value of TestSetting in app.config.

How can I get this pickup of the value to work?

Thanks for any help

Bob

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