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مهارة تقسيم الإسماء دفعة واحدة فى اكسيس
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اولا معرفة بعض الدوال فى اكسيس خاصة بالتعامل مع الحروف
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LTrim, RTrim, and Trim functions
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إرجاع متغير (سلسلة) يحتوي على نسخة من سلسلة محددة دون مسافات بادئة (LTrim) أو مسافات زائدة (RTrim) أو مسافات بادئة وزائدة (Trim).
Dim MyString, TrimString
MyString = " <-Trim-> " ' Initialize string.
TrimString = LTrim(MyString) ' TrimString = "<-Trim-> ".
TrimString = RTrim(MyString) ' TrimString = " <-Trim->".
TrimString = LTrim(RTrim(MyString)) ' TrimString = "<-Trim->".
' Using the Trim function alone achieves the same result.
TrimString = Trim(MyString) ' TrimString = "<-Trim->".
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Len function
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Returns a Long containing the number of characters in a string or the number of bytes required to store a variable.
Type CustomerRecord ' Define user-defined type.
ID As Integer ' Place this definition in a
Name As String * 10 ' standard module.
Address As String * 30
End Type
Dim Customer As CustomerRecord ' Declare variables.
Dim MyInt As Integer, MyCur As Currency
Dim MyString, MyLen
MyString = "Hello World" ' Initialize variable.
MyLen = Len(MyInt) ' Returns 2.
MyLen = Len(Customer) ' Returns 42.
MyLen = Len(MyString) ' Returns 11.
MyLen = Len(MyCur) ' Returns 8.
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The second example uses LenB and a user-defined function (LenMbcs) to return the number of byte characters in a string if ANSI is used to represent the string.
The second example uses LenB and a user-defined function (LenMbcs) to return the number of byte characters in a string if ANSI is used to represent the string.
Function LenMbcs (ByVal str as String)
LenMbcs = LenB(StrConv(str, vbFromUnicode))
End Function
Dim MyString, MyLen
MyString = "ABc"
' Where "A" and "B" are DBCS and "c" is SBCS.
MyLen = Len(MyString)
' Returns 3 - 3 characters in the string.
MyLen = LenB(MyString)
' Returns 6 - 6 bytes used for Unicode.
MyLen = LenMbcs(MyString)
' Returns 5 - 5 bytes used for ANSI.
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Returns a Variant (String) containing a specified number of characters from a string.
Dim MyString, FirstWord, LastWord, MidWords MyString = "Mid Function Demo" ' Create text string. FirstWord = Mid(MyString, 1, 3) ' Returns "Mid". LastWord = Mid(MyString, 14, 4) ' Returns "Demo". MidWords = Mid(MyString, 5) ' Returns "Function Demo".
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Mid function
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Dim MyString, FirstWord, LastWord, MidWords MyString = "Mid Function Demo" ' Create text string. FirstWord = Mid(MyString, 1, 3) ' Returns "Mid". LastWord = Mid(MyString, 14, 4) ' Returns "Demo". MidWords = Mid(MyString, 5) ' Returns "Function Demo".
مهارات فى اكسيس
===========================================مهارات فى اكسيس
اسم الملف لينك
معرفة عدد الاحرف او الكلمات الموجودة في احد الحقول في اكسيس Dcount https://youtu.be/WE0_of3cU0g
كيفية اخفاء شاشة الاكسس واظهار شاشة البرنامج مباشرة https://youtu.be/ePZKCngCXhI
برنامج أدخل تاريخ ميلادك يعطيك عمرك بالسنة و الشهر و اليوم MS Access Skills https://youtu.be/kuocx5KbRbk
مهارة تنسيق التاريخ فى اكسيس من خلال الدالة و format https://youtu.be/ma1CJv2YFZQ
مهارة تقسيم الإسماء دفعة واحدة فى اكسيس MS Access VBA ج1 https://youtu.be/mBUP70LnOdk
مهارة تقسيم الإسماء دفعة واحدة فى اكسيس MS Access VBA ج2 https://youtu.be/_GZzAtDjTe0
مهارة تقسيم الإسماء دفعة واحدة فى اكسيس MS Access VBA ج3 https://youtu.be/v_hXCFXO0gc
مهارة تقسيم الإسماء دفعة واحدة فى اكسيس MS Access VBA ج4 https://youtu.be/kD-bFyi3dVA
مهارة تقسيم الإسماء دفعة واحدة فى اكسيس MS Access VBA ج5 https://youtu.be/EPwSiIxkjvw
شرح بعض أوامر Docmd ج1 https://youtu.be/UTL2MZc-u6Y
شرح بعض أوامر Docmd ج3 https://youtu.be/SqwFND-10rI
شرح الامر DoCmd OutputTo لتصدير الملفات من اكسيس الى صيغ مختلفة acFormatPDF https://youtu.be/zRHXr4UbZ-0
شرح بعض أوامر Docmd DoCmd RunSQL https://youtu.be/1Gu57sq2wQQ
شرح بعض أوامر Docmd جزء اخير https://youtu.be/aypOAX7h4CE
كود استعاده اعدادت الاكسس هام جدااااا للمبرمج CurrentProject https://youtu.be/R_xi0JePnBo
مهارة التعامل مع CurrentDB لمعرفة محتويات قاعدة البيانات و انشاء وفتح وحذف استعلام ب CurrentDb.CreateQueryDef https://youtu.be/k3no0IfZZA0
تحويل الماكرو الى كود Macro to vb https://youtu.be/_qsmPNIPIEI
قائمة ملفات الكورس الاول -- تعلم اكسيس وقواعد بيانات MS Access https://www.youtube.com/playlist?list=PLMmy9Ec9B98wxI2RWVrjjtyV2knTFoR1t
Programming Access VBA قائمة ملفات الكورس الثانى-- البرمجة فى اكسيس https://www.youtube.com/playlist?list=PLMmy9Ec9B98ymtXXOLw2FeolA904Z-OsH
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دالة ازالة المسافات التى ليس لها لازمة من الاسم او الجملة او الفقرة
بطريقتان
اليك الكود
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Private Sub Command13_Click()
MsgBox NoSpaces1([txtName])
End Sub
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Function NoSpaces1(InName As String) As String
Dim NewName As String, NeXStr As String
Dim I As Integer
NewName = ""
InName = Trim(InName)
For I = 1 To Len(InName) - 1
If Mid(InName, I, 1) = " " And Mid(InName, I + 1, 1) = " " Then NewName = NewName Else NewName = NewName & Mid(InName, I, 1)
NeXStr = Mid(InName, I + 1, 1)
Next
NoSpaces1 = NewName + NeXStr
End Function
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Function NoSpaces(InName As String) As String
Dim NewName As String, ThePrevStr As String, TheStr As String
Dim I As Integer
InName = Trim(InName)
MsgBox "InName" & InName & Len(InName)
For I = 1 To Len(InName)
TheStr = Mid(InName, I, 1)
If TheStr = " " And ThePrevStr = " " Then TheStr = ""
If TheStr <> "" Then ThePrevStr = TheStr
NewName = NewName & TheStr
MsgBox I & "TheStr" & TheStr & "-" & Chr(13) & "ThePrevStr" & ThePrevStr & "-" & Chr(13) & "NewName" & NewName & "."
Next
NoSpaces = NewName
End Function
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InStr function
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Example
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Dim SearchString, SearchChar, MyPos
SearchString ="XXpXXpXXPXXP" ' String to search in.
SearchChar = "P" ' Search for "P".
' A textual comparison starting at position 4. Returns 6.
MyPos = Instr(4, SearchString, SearchChar, 1)
' A binary comparison starting at position 1. Returns 9.
MyPos = Instr(1, SearchString, SearchChar, 0)
' Comparison is binary by default (last argument is omitted).
MyPos = Instr(SearchString, SearchChar) ' Returns 9.
MyPos = Instr(1, SearchString, "W") ' Returns 0.
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