rewritten Microsoft SQLHelper (shared database Call Interface) a SqlHelper the connectionString caused an overall volume, uniform database connections increased by two strings to the specific name of the table in the DataSet interface. In the config files set database connection string private static string connectionString = System.Configuration.ConfigurationSettings.AppSettings [ "ConnectionString"] lt; !-- Application specific settings-- gt; Lt; AppSettingsgt; Lt; Add key = "ConnectionString" value = "packet size = 4096 user id = sa data source = localhost persist security info = = True initial catalog NorthWind password ="/gt; lt;/appSettingsgt; of course, the database can be connected directly to amend the methods used.

SQLHelper.cs

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