连接SQL SERVER公共类

　　'***************************************************************************************************** Option Explicit On 'Option Strict On '//*************************************************************************************************** Imports System.Data.SqlClient '//*************************************************************************************************** '//Begin defined namespace Namespace Sunerp.CommClass.Comm '//Defined Structure PublicApplicationVal '//Structure descriptoin '//本结构存取 数据库服务器名（Dbserver）、数据库用户ID（UserId）、 '//数据库用户密码（UserPWD）、数据库名（Dbase），为联接数据库提供参数。 '//为了满足某些简单查询的需要，提供了扩展的变量 常用表名（DBTable）、 '//查询字段名（QueryFieldName）、查询字段值 '//Begin define Structure PublicApplicationVal Public Structure PublicApplicationVal ' Public Dbserver, UserId UserPWD Dbase DBTable Account. Public Dbserver As String Public UserId As String Public UserPWD As String Public Dbase As String Public DBTable As String Public QueryFieldVale As String Public QueryFieldName As String End Structure '//End define Structure PublicApplicationVal '//*************************************************************************************************** '//*************************************************************************************************** '//Begin defined Class Public Class DBaseBindComm ''*********************************************************************** ''//**定义连接SQL Server Database的通用函数**// '//本函数创建一个到指定数据库的连接对象 SqlConnection '//本函数有1个参数，IPublicApplication 为公共数据结构 PublicApplicationVal， '//Begin define Function LinkedSqlServer Public Overloads Function LinkedSqlServer() As System.Data.SqlClient.SqlConnection Dim strconn As String Dim conn As New SqlConnection() strconn = "server=" & "erp" & _ ";user id=" & "erpsa" & _ ";password=" & "erpsa" & _ ";database=" & "erpdata" & ";" Try conn = New SqlConnection(strconn) conn.Open() StateVal = True LinkedSqlServer = conn Catch ex As Exception ' MsgBox(ex.ToString) StateVal = False LinkedSqlServer = Nothing Exit Function End Try End Function ''End defined LinkedSqlServer ''*********************************************************************** ''*********************************************************************** ''//**定义连接SQL Server Database的通用函数**// '//本函数创建一个到指定数据库的连接对象 SqlConnection '//本函数有1个参数，IPublicApplication 为公共数据结构 PublicApplicationVal， '//Begin define Function LinkedSqlServer Public Overloads Function LinkedSqlServer( _ ByVal IPublicApplication As PublicApplicationVal) _ As System.Data.SqlClient.SqlConnection Dim strconn As String Dim conn As New SqlConnection() strconn = "server=" & IPublicApplication.Dbserver & _ ";user id=" & IPublicApplication.UserId & _ ";password=" & IPublicApplication.UserPWD & _ ";database=" & IPublicApplication.Dbase & ";"