1.将全角数字转换成半角数字
2.字符串长度计算(针对全半角混合字符串)
3.动态给控件追加事件(使用递归调用实现全部控件的遍历)
4.时间格式(11:12)控件的自动输入实现
5.动态控制光标在TEXTBOX控件中的移动 6.使用API函数播放WAV声音. 7.使用API函数实现文件的创建,移动,删除.
1.将全角数字转换成半角数字
Public Function ZenkakuNumToHankakuNum(ByRef strNum As String) As Boolean Dim dblValue As Double = 0.0 ZenkakuNumToHankakuNum = True For cnt As Integer = 0 To strNum.Length - 1 dblValue = Char.GetNumericValue(strNum.Chars(cnt)) If dblValue < 0 Then ZenkakuNumToHankakuNum = False Continue For End If strNum = strNum.Replace(strNum.Chars(cnt),CType(dblValue,Integer)) Next End Function
2.字符串长度计算(针对全半角混合字符串)
Public Function TextBoxDataLengthChk(ByVal textBox As TextBox) As Boolean Dim strData As String = textBox.Text.Trim() Dim cntLength As Integer = 0 For cnt As Integer = 0 To strData.Length - 1 '半角文字、全角文字の長さ計算する cntLength = cntLength + System.Text.Encoding.Default.GetByteCount(strData.Chars(cnt)) Next If cntLength > textBox.MaxLength Then Return False End If Return True End Function
3.动态给控件追加事件(使用递归调用实现全部控件的遍历)
Private Sub AddEventToControls(ByVal con As Control) Dim subCon As Control For Each subCon In con.Controls If TypeOf subCon Is Panel Then AddEventToControls(subCon) End If If TypeOf subCon Is TextBox Then AddHandler subCon.GotFocus,AddressOf SoftKeyBoardForm_GotFocus End If Next End Sub
4.时间格式(11:12)控件的自动输入实现
Protected Sub txtTimeControl_KeyDown(ByVal sender As System.Object,ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown Dim textBox As TextBox Dim intSelectionStart As Integer = 0 Dim strTextBox As String = "" If TypeOf sender Is TextBox Then textBox = CType(sender,TextBox) intSelectionStart = textBox.SelectionStart strTextBox = textBox.Text 'キーの範囲チェック(0-9) If e.KeyValue >= 48 And e.KeyValue <= 57 Then If intSelectionStart = 2 Then textBox.SelectionStart = 3 ElseIf textBox.Text.Length = 5 And intSelectionStart < textBox.MaxLength Then textBox.Text = strTextBox.Substring(0,intSelectionStart) & strTextBox.Substring(intSelectionStart + 1,textBox.Text.Length - intSelectionStart - 1) textBox.SelectionStart = intSelectionStart End If Else textBox.SelectionLength = 0 End If End If End Sub
5.动态控制光标在TEXTBOX控件中的移动
Public Sub FocusMoveInControl(ByVal moveDirection As String) Dim txtTextBox As TextBox txtTextBox = CType(GetCurrentControlByIndex(frmCurrentActiveForm,intCurrentControlIndex),TextBox) ' 左へ移行する If moveDirection.Equals("left") Then If txtTextBox.SelectionStart > 0 Then txtTextBox.SelectionStart = txtTextBox.SelectionStart - 1 End If ' 右へ移行する ElseIf moveDirection.Equals("right") Then If txtTextBox.SelectionStart < txtTextBox.Text.Length Then txtTextBox.SelectionStart = txtTextBox.SelectionStart + 1 End If End If txtTextBox.Focus() End Sub
'根据控件的索引遍历得到控件
Private Function GetCurrentControlByIndex(ByVal con As Control,ByVal intControlIndex As Integer) As Control Dim control As Control = Nothing For Each control In con.Controls If intControlIndex = control.TabIndex Then conValide = control Exit For End If If TypeOf control Is Panel Then GetCurrentControlByIndex(control,intControlIndex) End If Next Return conValide End Function
6.使用API函数播放WAV声音. Private Declare Function WCE_PlaySound Lib "CoreDll.dll" Alias "PlaySound" _ (ByVal szSound As String,ByVal hMod As IntPtr,ByVal flags As Integer) As Integer Public Sub PlaySound(ByVal strSoundFile As String) Try WCE_PlaySound(strSoundFile,2) Catch ex As Exception End Try End Sub
7.使用API函数实现文件的创建,删除. #Region "常数定义" Private GENERIC_READ As Integer = &H80000000 Private GENERIC_WRITE As Integer = &H40000000 Private OPEN_EXISTING As Integer = 3 Private OPEN_NO_EXISTING As Integer = 1 Private FILE_FLAG_OVERLAPPED As Integer = &H40000000 Private iMode As Integer = Convert.ToInt32(FILE_FLAG_OVERLAPPED) #End Region #Region "STRUCT" ' This is the OverLapped structure used by the calls to the Windows API. Private Structure OVERLAPPED Private Internal As Integer Private InternalHigh As Integer Private Offset As Integer Private OffsetHigh As Integer Private hEvent As Integer End Structure #End Region #Region "API" Private Declare Function CreateFile Lib "CoreDll.dll" ( _ ByVal lpFileName As String,_ ByVal dwDesiredAccess As Integer,ByVal dwShareMode As Integer,_ ByVal lpSecurityAttributes As Integer,_ ByVal dwCreationDisposition As Integer,_ ByVal dwFlagsAndAttributes As Integer,_ ByVal hTemplateFile As Integer) As Integer
Private Declare Function WriteFile Lib "CoreDll.dll" ( _ ByVal hFile As Integer,ByVal Buffer As Byte(),_ ByVal nNumberOfBytesToWrite As Integer,_ ByRef lpNumberOfBytesWritten As Integer,_ ByRef lpOverlapped As OVERLAPPED) As Integer
Private Declare Function CloseHandle Lib "CoreDll.dll" ( _ ByVal Handle As Integer) As Int32
Private Declare Function MoveFileW Lib "CoreDll.dll" Alias "MoveFile" ( _ ByVal src As String,ByVal dst As String) As Boolean Private Declare Function CeDeleteFile Lib "CoreDll.dll" Alias "DeleteFile" ( _ ByVal strFileName As String) As Boolean #End Region Public Sub CreateFile(ByVal strFileName As String,ByVal bytText() As Byte) Dim hFile As Integer = 0 Dim overLapped1 As OVERLAPPED = New OVERLAPPED()
Try hFile = CreateFile(strFileName,GENERIC_READ Or GENERIC_WRITE,_ OPEN_NO_EXISTING,iMode,0) WriteFile(hFile,bytText,bytText.Length,overLapped1) CloseHandle(hFile) Catch ex As Exception End Try End Sub
Public Sub MoveFile(ByVal strFileNameS As String,ByVal strFileNameE As String) Try MoveFileW(strFileNameS,strFileNameE) Catch ex As Exception End Try End Sub
Public Sub DeleteFile(ByVal strFileName As String) Try CeDeleteFile(strFileName) Catch ex As Exception WriteErrLog("DeleteFile:",ex.Message) End Try End Sub (编辑:李大同)
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