为了初始化我的VouchersDGV数据网格视图我正在使用以下内容
DGV.AllowUserToDeleteRows = True
For i = 1 To DGV.RowCount - 1
DGV.Rows.Remove(DGV.Rows(i - 1))
DGV.Refresh()
Next
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但是当我第一次运行它时,我会接受错误
{"无法删除未提交的新行."} System.InvalidOperationException
如果我将继续运行我的代码并在我的数据网格中写一个新行,我会尝试再次初始化(现在我有两行,一行有数据,另一行是空的)我接受这个错误
{"无法删除未提交的新行."} System.InvalidOperationException
我无法解决,请有人帮助我吗?
我们可以*在SQL数据库中使用星号字符进行搜索操作吗?
MASQLComm = New SqlCommand("SELECT COUNT(*) AS [RecCount]
From " & tName & "
WHERE " & tName & fName & " = '" & {*} & ".Temp' ",
SQLConn)
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请告诉我一个代码.
我用vb.net开发了一个服务.
此服务是从Windows应用程序安装的,该应用程序在服务启动后立即关闭.
在服务内部我有一个过程"Protected Overrides Sub OnCustomCommand",这个过程正常,直到指针到达我给你的指令:
Protected Overrides Sub OnCustomCommand(ByVal command As Integer)
StartLogFile("Custom Command {" & command & "} invoked", EventLogEntryType.Information)
Dim Position As String
Dim myFile As String = Nothing
Dim myTime As String = Nothing
Try
If command = SimpleServiceCustomCommands.StartWorker Then
Position = "GetKeyValue Time"
myTime = GetKeyValue("Time", "", RegPath)
Position = "GetKeyValue Name"
myFile = GetKeyValue("Name", "", RegPath)
StartLogFile("Notice OnCustomCommand" & vbNewLine & "MyTime= { " & myTime & "}, {MyFile= { " & myFile & …Run Code Online (Sandbox Code Playgroud) 需要在表字段中写入数字7.2.
该领域需要什么类型.
变量需要什么类型?
现在我有能力开始一个新项目.到现在为止,我总是选择WFA.
现在我想知道选择WPF或WFA的内容是什么.
选择的动机是什么?
其他信息
该项目涉及:
我实现了这样的进度条:
TableCreation.ProgressBar2.Value = 0
TableCreation.ProgressBar2.Maximum = CInt(FieldsNumber)
'==================
For SecondLoopCount = 1 To CInt(FieldsNumber) Step 1
'----------------------------------------------
TableCreation.ProgressBar2.Value = SecondLoopCount
TableCreation.ProgressBar2.Refresh()
TableCreation.ProgressBar2.Show()
' ....... Some Code ......
Next
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我处理了这个子事件中BackgroundWorker的DoWork事件:
Public Shared Sub bw_DoWork(ByVal sender As Object, ByVal e As DoWorkEventArgs)
Dim bw As BackgroundWorker = New BackgroundWorker
Dim worker As BackgroundWorker = CType(sender, BackgroundWorker)
For i = 1 To 10
If worker.CancellationPending = True Then
e.Cancel = True
Exit For
Else
' Perform a time consuming …Run Code Online (Sandbox Code Playgroud)