四月三日

同样是看英语，看完英文文献感觉英语水平有进步，但程序的帮助文档为什么就没有？

看来，不管学什么，都是一个反复的过程。不懂的，看不明白的，只有反复弄明白了才会进步。

所以，以后查阅的文档，把链接保存下来，关键句子，回头再消化。

For conceptual information about using this namespace when programming with the .NET Framework

http://msdn.microsoft.com/en-us/library/system.data.oracleclient(v=vs.80).aspx

1             strCon = "user id=" & INIDefine.valueINI.USER
2             strCon = strCon & ";data source="
3             strCon = strCon & INIDefine.valueINI.SID
4             strCon = strCon & ";password="
5             strCon = strCon & INIDefine.valueINI.PASSWORD

注意字符串的拼接

1 DBOracle.SQLWhere = "CD_WORKER='" & strWorkerCD & "'"

怎样把编程速度提高？不能光靠网上查。

 1     Public Function SearchWorker(ByVal strWorkerCD As String, _
 2                                         ByRef strWorkerName As String) As Integer
 3 
 4         Dim lRet As Integer  
 5 
 6         Try
 7 
 9             DBOracle.Clear()
10             DBOracle.SQLTable = "M_WORKER"
11             DBOracle.SQLSelect = "NA_WORKER"
12             DBOracle.SQLWhere = "CD_WORKER='" & strWorkerCD & "'"
13             DBOracle.MakeSqlStr(SELECT_SQL)
14 
16             lRet = DBOracle.DynasetSql2()
17 
19             If lRet = HAVE_DATA Then
20                 strWorkerName = CStr(DBOracle.SQLResult2.Item("NA_WORKER")).Trim()
21             Else
22                 strWorkerName = ""
23             End If
第十三行与第十六行区别？

1 Public Property SQLResult2() As OracleDataReader

属性过程定义as OracleDataReader？

site:msdn.microsoft.com oracledatareader

1 Public Shared Property DBOracle() As clsCmnDB

String.Trim Method ():Removes all occurrences of white space characters from the beginning and end of this instance 

OracleTransaction Class:Represents a transaction to be made in the database 

 1     Public Sub Main()
 2         Dim a() As String = {"P", "1P", "3N1"}
 3         Dim i As Integer
 4         Dim b As String = "PPARTS-0401-01"
 5         For i = 0 To a.Length - 1
 6             If b.StartsWith(a(i)) Then
 7                 b = b.Trim(a(i).ToArray)
 8             End If
 9         Next
10         Console.WriteLine(b)
11         Console.Read()
12     End Sub

注意Trim会把所有的p全部截掉，而不是只截一个。

 

posted @ 2013-04-03 16:32  xtypeu  阅读(128)  评论(0)  编辑  收藏  举报