Question

我试图在“Flipdatagride”按钮的工作方式中合并以下Codesample，将数据从水平旋转到垂直，这是c＃

此时我在vb.net 2013中创建的My Application中的数据是数据网格视图水平呈现，顶部有一个列标题，输入文本位于每个单独标题下的文本框或点击框中基于行。

这是从c＃到vb.net的代码示例转换

Public Class Form1
Private ops As New Operations
Private ds As DataSet = Nothing
Private dt As DataTable = Nothing
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    ds = New DataSet()
    dt = New DataTable()

    dt = GetCustomers()
    ds.Tables.Add(dt)

    Dim my_DataView As DataView = ds.Tables(0).DefaultView
    DataGridView1.DataSource = my_DataView
End Sub
Private Function GetCustomers() As DataTable
    Dim table As New DataTable()
    table.TableName = "Customers"

    table.Columns.Add("Name", GetType(String))
    table.Columns.Add("Price", GetType(String))
    table.Columns.Add("Country", GetType(String))

    table.Rows.Add(New Object() {"Mohamad", "1700", "Egypt"})
    table.Rows.Add(New Object() {"Tarek", "550", "Syria"})
    table.Rows.Add(New Object() {"Gamal", "762", "Saudi Arabia"})

    table.AcceptChanges()

    Return table

End Function
Public Function FlipDataSet(ByVal my_DataSet As DataSet) As DataSet
    Dim ds As New DataSet()

    For Each dt As DataTable In my_DataSet.Tables
        Dim table As New DataTable()

        For i As Integer = 0 To dt.Rows.Count
            table.Columns.Add(Convert.ToString(i))
        Next
        Dim r As DataRow
        For k As Integer = 0 To dt.Columns.Count - 1
            r = table.NewRow()
            r(0) = dt.Columns(k).ToString()
            For j As Integer = 1 To dt.Rows.Count
                r(j) = dt.Rows(j - 1)(k)
            Next
            table.Rows.Add(r)
        Next

        ds.Tables.Add(table)
    Next

    Return ds
End Function
Private Sub butFlip_Click(sender As Object, e As EventArgs) Handles butFlip.Click

    Dim currentDataSet As DataSet = FlipDataSet(ds) ' Flip the DataSet
    Dim currentDataView As DataView = currentDataSet.Tables(0).DefaultView
    DataGridView1.DataSource = currentDataView

    butFlip.Enabled = False
    butNormal.Enabled = True
End Sub
Private Sub butNormal_Click(sender As Object, e As EventArgs) Handles butNormal.Click
    Dim currentDataSet As DataView = ds.Tables(0).DefaultView
    DataGridView1.DataSource = currentDataSet

    butFlip.Enabled = True
    butNormal.Enabled = False
End Sub

Private Sub butExit_Click(sender As Object, e As EventArgs) Handles butExit.Click
    Close()
End Sub

Private Sub butExport_Click(sender As Object, e As EventArgs) Handles butExport.Click
    If Not String.IsNullOrWhiteSpace(txtSheetName.Text) Then
        Select Case ops.ExportDataTable(CType(DataGridView1.DataSource, DataView).Table, txtSheetName.Text)
            Case OperationResults.Success
                MessageBox.Show("Data written to file")
            Case OperationResults.SheetExist
                MessageBox.Show("Sheet already exists, aborted")
            Case OperationResults.UnknownException
                MessageBox.Show($"Operation throw an exception{Environment.NewLine}{ops.Exception.Message}")
        End Select
    End If
    End Sub
    End Class`

我想要实现的是，当用户在我的应用程序中选择“生成”按钮时，它将首先将数据网格翻转为垂直，并使用以上代码示例中的以下代码以相同格式导出为excel;

Private Sub butFlip_Click(sender As Object, e As EventArgs) Handles 
butFlip.Click

Dim currentDataSet As DataSet = FlipDataSet(ds) ' Flip the DataSet
Dim currentDataView As DataView = currentDataSet.Tables(0).DefaultView
DataGridView1.DataSource = currentDataView

butFlip.Enabled = False
butNormal.Enabled = True
End Sub
Private Sub butNormal_Click(sender As Object, e As EventArgs) Handles 
butNormal.Click
Dim currentDataSet As DataView = ds.Tables(0).DefaultView
DataGridView1.DataSource = currentDataSet

butFlip.Enabled = True
butNormal.Enabled = False
End Sub

和

    Public Function FlipDataSet(ByVal my_DataSet As DataSet) As DataSet
    Dim ds As New DataSet()

    For Each dt As DataTable In my_DataSet.Tables
        Dim table As New DataTable()

        For i As Integer = 0 To dt.Rows.Count
            table.Columns.Add(Convert.ToString(i))
        Next
        Dim r As DataRow
        For k As Integer = 0 To dt.Columns.Count - 1
            r = table.NewRow()
            r(0) = dt.Columns(k).ToString()
            For j As Integer = 1 To dt.Rows.Count
                r(j) = dt.Rows(j - 1)(k)
            Next
            table.Rows.Add(r)
        Next

        ds.Tables.Add(table)
    Next

    Return ds
End Function

到目前为止我已经得到了这个但是button2'Flipdata'只是将datagridview留空了一个名为'0'的列标题。有人有什么建议吗？

Imports System.Data.DataTable
Imports System.IO
Imports Microsoft.Office.Interop
Public Class Form1
Dim table As New DataTable(0)
Public checkBoxList As List(Of CheckBox)
Private ds As DataSet = Nothing
Private dt As DataTable = Nothing
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    ds = New DataSet()
    dt = New DataTable()
    ds.Tables.Add("Table")
    Dim my_DataView As DataView = ds.Tables(0).DefaultView
    DataGridView1.DataSource = my_DataView
    table.Columns.Add("Forename", Type.GetType("System.String"))
    table.Columns.Add("Surname", Type.GetType("System.String"))
    table.Columns.Add("Food", Type.GetType("System.String"))
    checkBoxList = New List(Of CheckBox) From {CheckBox1, CheckBox2, CheckBox3, CheckBox4}


End Sub

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

    Dim currentDataSet As DataSet = FlipDataSet(ds) ' Flip the DataSet
    Dim values As String = "" &
    String.Join(" & ", checkBoxList _
    .Where(Function(cb) cb.Checked).Select(Function(cb) cb.Text))

    ' use values for placing into your DataGridView
    CheckBox1.Text = values
    CheckBox2.Text = values
    CheckBox3.Text = values
    CheckBox4.Text = values


    table.Rows.Add(TextBox1.Text, TextBox2.Text, values.ToString)
    DataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill
    DataGridView1.RowTemplate.Height = 100
    DataGridView1.AllowUserToAddRows = False
    DataGridView1.DataSource = table

    'Save to excel with headers
    Dim ExcelApp As Object, ExcelBook As Object
    Dim ExcelSheet As Object
    Dim i As Integer
    Dim j As Integer

    'create object of excel
    ExcelApp = CreateObject("Excel.Application")
    ExcelBook = ExcelApp.WorkBooks.Add
    ExcelSheet = ExcelBook.WorkSheets(1)

    With ExcelSheet
        For Each column As DataGridViewColumn In DataGridView1.Columns
            .cells(1, column.Index + 1) = column.HeaderText
        Next
        For i = 1 To Me.DataGridView1.RowCount
            .cells(i + 1, 1) = Me.DataGridView1.Rows(i - 1).Cells("Forename").Value
            For j = 1 To DataGridView1.Columns.Count - 1
                .cells(i + 1, j + 1) = DataGridView1.Rows(i - 1).Cells(j).Value
            Next
        Next

    End With

    ExcelApp.Visible = True
    '
    ExcelSheet = Nothing
    ExcelBook = Nothing
    ExcelApp = Nothing
End Sub

Private Sub DataGridView1_CellContentClick(sender As Object, e As DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick

End Sub
Public Function FlipDataSet(ByVal my_DataSet As DataSet) As DataSet
    Dim ds As New DataSet()

    For Each dt As DataTable In my_DataSet.Tables
        Dim table As New DataTable()

        For i As Integer = 0 To dt.Rows.Count
            table.Columns.Add(Convert.ToString(i))
        Next
        Dim r As DataRow
        For k As Integer = 0 To dt.Columns.Count - 1
            r = table.NewRow()
            r(0) = dt.Columns(k).ToString()
            For j As Integer = 1 To dt.Rows.Count
                r(j) = dt.Rows(j - 1)(k)
            Next
            table.Rows.Add(r)
        Next

        ds.Tables.Add(table)
    Next

    Return ds
End Function

Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
    Dim currentDataSet As DataSet = FlipDataSet(ds) ' Flip the DataSet
    Dim currentDataView As DataView = currentDataSet.Tables(0).DefaultView
    DataGridView1.DataSource = currentDataView

    Button2.Enabled = False

End Sub
End Class`

Datagridview to excel - Late Binding

0 个答案: