在 DataGridView 中复制行

Duplicating Rows In DataGridView

以下代码将制表符分隔的文件加载到我的 DataGridView 中(从数据文件加载 1 条记录)。所有这一切都很完美,但是,我需要复制这条记录 X 次。复制行后,我最终需要编辑一些字段并写入添加了行的新文件。

我试过动态添加行,但它对我大喊大叫说我不能,因为数据已绑定。

建议?

    Dim file As String = "Temp.txt"
    Dim path As String = "C:\Temp\"
    Dim ds As New DataSet
    Dim tbl As New DataTable

    Try
        If IO.File.Exists(IO.Path.Combine(path, file)) Then
            Dim ConStr As String = _
            "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & _
            path & ";Extended Properties=""Text;HDR=No;FMT=TabDelimited\"""
            Dim conn As New OleDb.OleDbConnection(ConStr)
            Dim da As New OleDb.OleDbDataAdapter("Select * from " & _
            file, conn)
            da.Fill(ds, "TextFile")
        End If
    Catch ex As Exception
        MessageBox.Show(ex.ToString)
    End Try

    DataGridView1.DataSource = ds.Tables(0)

您不能直接添加到数据绑定的 DataGridView,因为数据驻留在其他地方,而 DGV 只是显示那里的内容。向 DataTable 添加行:

Dim dr = ds.Tables(0).NewRow()

这将创建一个新行,并根据 table 为其定义列。将新项目的数据添加到其中,然后将其添加到 table:

dr.Item(0) = "something"   ' add to column one
... etc
ds.Tables(0)Rows.Add(dr)

您实际上并不需要为目前已有的内容创建 DataSet。备选方案:

Private myDT As New DataTable      
...
da.Fill(myDT)

从字面上克隆一行数据:

Dim dr As DataRow

For n As Integer = 0 To NumberOfDuplicates
    dr = myDT.NewRow              ' new DataRow
    For c As Integer = 0 To myDT.Columns.Count - 1   ' copy data from 0 to NewRow
        dr.Item(c) = myDT.Rows(0).Item(c)
    Next
    myDT.Rows.Add(dr)            ' add NewRow to datatable
Next n

请注意,您需要为每个克隆创建一个新行,内部循环将数据从第 (0) 行复制到每个新行。

'Hope This helps DGV1 is the datagridview
'To copy Row
Private Sub CopyButton_Click(sender As System.Object, e As System.EventArgs) Handles CopyButton.Click
    CopyRowIndex = DGV1.CurrentRow.Index
End Sub

'To Paste Row
Private Sub PasteButton_Click(sender As System.Object, e As System.EventArgs) Handles PasteButton.Click
    PasteRowIndex = DGV1.CurrentRow.Index
    For index As Int32 = 0 To DGV1.ColumnCount - 1
        DGV1.Rows(CInt(PasteRowIndex)).Cells(index).Value = DGV1.Rows(CInt(CopyRowIndex)).Cells(index).Value
    Next

End Sub

'To Duplicate Rows
Private Sub DuplicateButton_Click(sender As System.Object, e As System.EventArgs) Handles DuplicateButton.Click
    CopyRowIndex = DGV1.CurrentRow.Index
    DGV1.Rows.Add()
    DuplicateRowIndex = DGV1.Rows.Count - 1
    For index As Int32 = 0 To DGV1.ColumnCount - 1
        DGV1.Rows(CInt(DuplicateRowIndex)).Cells(index).Value = DGV1.Rows(CInt(CopyRowIndex)).Cells(index).Value
    Next
End Sub