Local operation is normal, is not published to the server, find a number of articles, did not solve my problem, later found to be wrong path and file deletion.
The original configuration file like this:
<add name="TRidentityEntities" connectionString="metadata=res://*/TRidentityModel.csdl|res://*/TRidentityModel.ssdl|res://*/TRidentityModel.msl;provider=MySql.Data.MySqlClient;provider connection string="server=localhost;user id=root;password=xxxxxx;persistsecurityinfo=True;database=xxxxxx;Character Set=utf8"" providerName="System.Data.EntityClient" />
edit a bit:
<add name="TRidentityEntities" connectionString="metadata=~/bin/TRidentityDB\TRidentityModel.csdl|~/bin/TRidentityDB\TRidentityModel.ssdl|~/bin/TRidentityDB\TRidentityModel.msl;provider=MySql.Data.MySqlClient;provider connection string="server=localhost;user id=root;password=xxxxxx;database=xxxxxx;Character Set=utf8"" providerName="System.Data.EntityClient" />
.csdl / .ssdl / .msl these three files when you compile will be in the bin directory of your project, copy came on the line.