vb.net 自定义数据库链接类(Access)
自定义数据库链接类(Access)是链接Access数据库时使用的类。
补足：Application.StartupPath.ToString是指定生成.EXE文件的路径，把数据库和执行文件存放到一起时，不管安装后在什么路径都无需特定指定。
Imports System.Data.OleDb
#Region "全局变量"
Private mTimeout As Integer
Private mDbConn As OleDbConnection
Private mSqlConn As OleDbCommand 'SQL执行
Private sTblNm As String '存放数据的表名
Private mbOpen As Boolean 'DB链接判断用
Private mDbReader As OleDbDataReader
Private mDbTrans As OleDbTransaction
Private mbTran As Boolean = False 'Transaction开始判断用
Private sSqlStr As String 'SQL文
Private mDbResult As DB_RESULT 'EXECUTE方法的处理结果
Private mDbConnStr As String = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & Application.StartupPath.ToString & _
&nbs
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using System;
using System.Data;
using System.Xml;
using System.Data.OleDb ;
using System.Collections;
namespace ePhoto.AccessDAL
{
/// <summary>
/// DBUtil 操作Access数据库
/// </summary>
public class DBUtil
{
private Hashtable parmCache = Hashtable.Synchronized(new ......
How To ... Access the Z-Depth channel
delete $VoxelBox*
rbmp
= render outputsize:[32,32] channels:#(#zdepth) vfb:
off
z_d
= getchannelasmask rbmp #zdepth
progressstart "Rendering Voxels..."
for
y = 1 to
rbmp.height do
(
progressupdate (100.0 * y / rbmp.height)
pixel_line = ......
这一篇我再说说水晶报表的情况。ACCESS中对应水晶报表方面，大家可能会遇到的最多的问题应该就是打开报表后
会出现需要登录的问题。
这个是为什么呢？明明我没有设置密码，怎么会有要输入密码呢？如果你够沉着，如果你的debug经验不缺乏的话，
你会发现在水晶报表跳出输入密码的登录框中，access的路径不是我现在数据库� ......
Option Explicit
Private Declare Function CreatePipe Lib "kernel32" (phReadPipe As Long, phWritePipe As Long, lpPipeAttributes As SECURITY_ATTRIBUTES, ByVal nSize As Long) As Long
Private Declare Function WriteFile Lib "kernel32" ......
