以下代码将制表符分隔文件加载到我的DataGridView中(从数据文件中加载1条记录)。所有这一切都很完美,但是,我需要复制此记录X次。一旦行重复,我将需要最终编辑一些字段并写入添加了行的新文件。
我尝试动态添加行但是我大吼大叫说我不能因为数据已经绑定了。
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)
答案 0 :(得分:1)
您无法直接添加到数据绑定的DataGridView
,因为数据位于其他位置,而DGV只是显示其中的内容。要向DataTable
添加行:
Dim dr = ds.Tables(0).NewRow()
这将创建一个新行,其中包含基于表定义的列。将新项目的数据添加到其中,然后将其添加到表中:
dr.Item(0) = "something" ' add to column one
... etc
ds.Tables(0)Rows.Add(dr)
到目前为止,你真的不需要为你所拥有的东西创建一个DataSet
。替代方法:
Private myDT As New DataTable
...
da.Fill(myDT)
直接克隆一行的数据:
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,内部循环将数据从行(0)复制到每个新行。
答案 1 :(得分:0)
'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