vb.net 连接到数据库时正确声明 ConfigurationManager
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Correctly declaring ConfigurationManager when connecting to database
提问by sheron
How do I solve the error message "ConfigurationManager not declared" when used to connect to database?
用于连接数据库时出现“ConfigurationManager未声明”错误信息如何解决？
Here is the line of code which gives the error:
这是给出错误的代码行：
SQLConnStr= ConfigurationManager.ConnectionStrings("SQLConnStr").ConnectionString
回答by Crimsonland
Have you tried to Add Reference
您是否尝试过添加参考
`System.Configuration`
on you References Folder.
在您的参考文件夹中。
Just simply right click your references folder on your project then click add reference.. and then look for System.Configuration then ok.
只需右键单击项目上的引用文件夹，然后单击添加引用.. 然后查找 System.Configuration 然后确定。
then add
然后加
Imports System.Configuration
on your form
在你的表格上
Change you app config to this:
将您的应用程序配置更改为：
<connectionStrings>
<add name="SQLConnStr" connectionString="Data Source=HOTEL_MySQLSERVERR;Initial Catalog=GuestBooking;User ID=xyz;Password=xyz" providerName="System.Data.SqlClient" />
</connectionStrings>
//your app config name and connection string name must be the same
//您的应用配置名称和连接字符串名称必须相同
add name="SQLConnStr"
添加名称=“SQLConnStr”
ConnectionStrings("SQLConnStr").
连接字符串（“SQLConnStr”）。
SQLConnStr= ConfigurationManager.ConnectionStrings("SQLConnStr").ConnectionString
and have a look at this:
看看这个：
Fix the Name ‘ConfigurationManager' is Not Declared Error
修复名称“ConfigurationManager”未声明错误
Regards
问候
回答by Santosh wavare
I think you need to try removing and adding the reference again "System.Configuration.dll" Under Project > Add refrence > .Net > select System.Configuration
我认为您需要尝试删除并再次添加引用“System.Configuration.dll” 在 Project > Add refrence > .Net > 选择 System.Configuration
