CodePudding user response:

Is not found, or cannot access,
Generally speaking, there are two situations,
1 the connection string to write wrong, especially the data source
2 May also be a server mssqlserver didn't open,

CodePudding user response:

Before she met the issue to a database connection, a, he is used to directly open the use DESKTOP - 885100 I, in the connection. Cause even can't do it

CodePudding user response:

Database connection error, check whether the connection string to write is wrong

CodePudding user response:

You first according to the 1 l to set up the service start, and then use manager studio login, and see if it is allow remote connection, final inspection under the connection string, pay attention to your connections in the connection string instance if you log in selected instances

CodePudding user response: