[英]First chance exception of 'System.Data.EntityException'. The underlying provider failed on Open
[英]System.Data.EntityException: The underlying provider failed on Open
我正在构建一个在服务器计算机上具有数据库的应用程序,并且正在使用此方法进行数据库访问:
public static string GetDefaultConnectionString()
{
//get my db info from ini file
dbinfo DatabaseInfo = new dbinfo();
DatabaseInfo = GetDatabaseInfo();
if (DatabaseInfo.dbName == "" || DatabaseInfo.Password == "" || DatabaseInfo.Server == "" || DatabaseInfo.UserId == "")
{
throw new Exception("Database config file is not valid");
}
else
{
MessageBox.Show("Db name " + DatabaseInfo.dbName);
MessageBox.Show("User " + DatabaseInfo.UserId);
MessageBox.Show("Db Pass " + DatabaseInfo.Password);
MessageBox.Show("Db Server " + DatabaseInfo.Server);
}
string conStrIntegratedSecurity = new System.Data.EntityClient.EntityConnectionStringBuilder
{
Metadata = "res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl",
Provider = "System.Data.SqlClient",
ProviderConnectionString = new System.Data.SqlClient.SqlConnectionStringBuilder
{
InitialCatalog = DatabaseInfo.dbName,
DataSource = DatabaseInfo.Server,
IntegratedSecurity = true,
UserID = DatabaseInfo.UserId,
Password = DatabaseInfo.Password,
MultipleActiveResultSets = true,
ConnectTimeout = 0,
MaxPoolSize = 500,
}.ConnectionString
}.ConnectionString;
//MessageBox.Show(conStrIntegratedSecurity);
return conStrIntegratedSecurity;
}
它在服务器PC上工作正常。 但是,当我在任何客户端计算机上安装此应用程序时,它无法打开连接,并且显示以下错误消息:
System.Data.EntityException: The underlying provider failed on Open. --->
System.Data.SqlClient.SqlException: Cannot open database "dbName" requested by the login. The login failed.
Login failed for user 'ServerName\User'.
有人知道为什么会这样吗?
我只是用
IntegratedSecurity = true,
至
IntegratedSecurity = false,
而且有效!
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