[英]Use and call the connection string in the forms/ c#
我正在使用c#构建桌面应用程序,像这样将连接字符串放入app.config文件中
<connectionStrings>
<add name="ComputerManagement"
connectionString="Provider=Microsoft.ACE.OLEDB.12.0; Data Source=...;Initial Catalog=Computersh;Integrated Security=True"/>
</connectionStrings>
如何在表格中调用连接字符串?
您可以使用ConfigurationManager
获取连接字符串:
using System.Configuration;
var connection = ConfigurationManager.ConnectionStrings["ComputerManagement"];
但是您仍然需要使用一些东西来与它连接到数据库,例如SqlConnection
: http : //msdn.microsoft.com/en-gb/library/system.data.sqlclient.sqlconnection.aspx
using System.Configuration;
using System.Data.SqlClient;
var connection = ConfigurationManager.ConnectionStrings["ComputerManagement"];
if (connection != null)
{
using (var sqlcon = new SqlConnection(connection.ConnectionString))
{
...
}
}
参考System.Configuration
和使用
System.Configuration.ConfigurationManager
.ConnectionStrings["ComputerManagement"].ConnectionString
像这样:
var constring = ConfigurationManager.ConnectionStrings["ComputerManagement"].ConnectionString;
另外,您还必须using System.Configuration;
添加它using System.Configuration;
:)
使用ConfigurationManager
应该足以:
var connection = ConfigurationManager.ConnectionStrings["ComputerManagement"];
然后,在访问实际字符串之前检查null
:
if (connection != null) {
var connectionString = connection.ConnectionString;
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.