copy of dataform1.vb

VBA专业项目进行开发的实例项目的一些源代码

    Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
        Try
            'Clear out the current edits
            Me.BindingContext(objtestdataset, "tblClients").EndCurrentEdit()
            Me.BindingContext(objtestdataset, "tblClients").AddNew()
        Catch eEndEdit As System.Exception
            System.Windows.Forms.MessageBox.Show(eEndEdit.Message)
        End Try
        Me.objtestdataset_PositionChanged()

    End Sub
    Private Sub btnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
        Try
            'Attempt to update the datasource.
            Me.UpdateDataSet()
        Catch eUpdate As System.Exception
            'Add your error handling code here.
            'Display error message, if any.
            System.Windows.Forms.MessageBox.Show(eUpdate.Message)
        End Try
        Me.objtestdataset_PositionChanged()

    End Sub
    Private Sub btnLoad_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLoad.Click
        Try
            'Attempt to load the dataset.
            Me.LoadDataSet()
        Catch eLoad As System.Exception
            'Add your error handling code here.
            'Display error message, if any.
            System.Windows.Forms.MessageBox.Show(eLoad.Message)
        End Try
        Me.objtestdataset_PositionChanged()

    End Sub
    Private Sub btnNavFirst_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNavFirst.Click
        Me.BindingContext(objtestdataset, "tblClients").Position = 0
        Me.objtestdataset_PositionChanged()

    End Sub
    Private Sub btnLast_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLast.Click
        Me.BindingContext(objtestdataset, "tblClients").Position = (Me.objtestdataset.Tables("tblClients").Rows.Count - 1)
        Me.objtestdataset_PositionChanged()

    End Sub
    Private Sub btnNavPrev_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNavPrev.Click
        Me.BindingContext(objtestdataset, "tblClients").Position = (Me.BindingContext(objtestdataset, "tblClients").Position - 1)
        Me.objtestdataset_PositionChanged()

    End Sub
    Private Sub btnNavNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNavNext.Click
        Me.BindingContext(objtestdataset, "tblClients").Position = (Me.BindingContext(objtestdataset, "tblClients").Position + 1)
        Me.objtestdataset_PositionChanged()

    End Sub
    Private Sub objtestdataset_PositionChanged()
        Me.lblNavLocation.Text = (((Me.BindingContext(objtestdataset, "tblClients").Position + 1).ToString + " of  ") _
                    + Me.BindingContext(objtestdataset, "tblClients").Count.ToString)

    End Sub
    Private Sub btnCancelAll_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCancelAll.Click
        Me.objtestdataset.RejectChanges()

    End Sub
    Public Sub UpdateDataSet()
        'Create a new dataset to hold the changes that have been made to the main dataset.
        Dim objDataSetChanges As Project1.testdataset = New Project1.testdataset()
        'Stop any current edits.
        Me.BindingContext(objtestdataset, "tblClients").EndCurrentEdit()
        'Get the changes that have been made to the main dataset.
        objDataSetChanges = CType(objtestdataset.GetChanges, Project1.testdataset)
        'Check to see if any changes have been made.
        If (Not (objDataSetChanges) Is Nothing) Then
            Try
                'There are changes that need to be made, so attempt to update the datasource by
                'calling the update method and passing the dataset and any parameters.
                Me.UpdateDataSource(objDataSetChanges)
                objtestdataset.Merge(objDataSetChanges)
                objtestdataset.AcceptChanges()
            Catch eUpdate As System.Exception
                'Add your error handling code here.
                Throw eUpdate
            End Try
            'Add your code to check the returned dataset for any errors that may have been
            'pushed into the row object's error.
        End If

    End Sub
    Public Sub LoadDataSet()
        'Create a new dataset to hold the records returned from the call to FillDataSet.
        'A temporary dataset is used because filling the existing dataset would
        'require the databindings to be rebound.
        Dim objDataSetTemp As Project1.testdataset
        objDataSetTemp = New Project1.testdataset()
        Try
            'Attempt to fill the temporary dataset.
            Me.FillDataSet(objDataSetTemp)
        Catch eFillDataSet As System.Exception
            'Add your error handling code here.
            Throw eFillDataSet
        End Try
        Try
            'Empty the old records from the dataset.
            objtestdataset.Clear()
            'Merge the records into the main dataset.
            objtestdataset.Merge(objDataSetTemp)
        Catch eLoadMerge As System.Exception
            'Add your error handling code here.
            Throw eLoadMerge
        End Try

    End Sub
    Public Sub UpdateDataSource(ByVal ChangedRows As Project1.testdataset)
        Try
            'The data source only needs to be updated if there are changes pending.
            If (Not (ChangedRows) Is Nothing) Then
                'Open the connection.
                Me.OleDbConnection1.Open()
                'Attempt to update the data source.
                OleDbDataAdapter1.Update(ChangedRows)
            End If
        Catch updateException As System.Exception
            'Add your error handling code here.
            Throw updateException
        Finally
            'Close the connection whether or not the exception was thrown.
            Me.OleDbConnection1.Close()
        End Try

    End Sub
    Public Sub FillDataSet(ByVal dataSet As Project1.testdataset)
        'Turn off constraint checking before the dataset is filled.
        'This allows the adapters to fill the dataset without concern
        'for dependencies between the tables.
        dataSet.EnforceConstraints = False
        Try
            'Open the connection.
            Me.OleDbConnection1.Open()
            'Attempt to fill the dataset through the OleDbDataAdapter1.
            Me.OleDbDataAdapter1.Fill(dataSet)
        Catch fillException As System.Exception
            'Add your error handling code here.
            Throw fillException
        Finally
            'Turn constraint checking back on.
            dataSet.EnforceConstraints = True
            'Close the connection whether or not the exception was thrown.
            Me.OleDbConnection1.Close()
        End Try

    End Sub

    Private Sub DataForm1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'MsgBox(System.Environment.CurrentDirectory)

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim xlApp As Excel.Application
        Dim xlBook As Excel.Workbook
        Dim xlSheet As Excel.Worksheet
        xlApp = CType(CreateObject("Excel.Application"), Excel.Application)
        xlBook = CType(xlApp.Workbooks.Add, Excel.Workbook)
        xlSheet = CType(xlBook.Worksheets(1), Excel.Worksheet)
        ' Place some text in the second row of the sheet.
        'xlApp.Activate()
        xlSheet.Cells(2, 2) = "This is column B row 2"
        ' Show the sheet.
        xlSheet.Application.Visible = True
        ' Save the sheet to C:\test.xls directory.
        'xlSheet.SaveAs("C:\Test.xls")
        ' Optionally, you can call xlApp.Quit to close the work sheet.

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Me.Close()

    End Sub

    Private Sub editZipCode_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles editZipCode.TextChanged

    End Sub

    Private Sub lblZipCode_Click(ByVal sender As System.Object