从 DataTable 到另一个且仍然是目标 DataTable 的 ImportRow 是空的 VB.NET

Question

您好，我正在尝试将一行从 DataTable 复制到另一行，我几乎到处查看，但找不到发生这种情况的原因，我正在使用 ImportRow，但 New DataTable 仍然为空。

这是我找到的类似答案之一，但仍然无法正常工作！：

   Dim newTable As New DataTable
        Dim dsFrom As New DataTable

        For Each DBShoes In list
            Dim iShoeID As Integer
            iShoeID = DBShoes.sShoes_ID
            dsFrom = DBShoes.GetFullShoeDetails(iShoeID)
            For Each dr As DataRow In dsFrom.Rows
                newTable.Rows.Add(dr.ItemArray)
            Next
        Next
        GridView1.DataSource = newTable
        GridView1.DataBind()

错误：输入数组长于该表中的列数。

这是不会崩溃但 DataTable 中没有添加任何内容的导入： 将 newTable 调暗为新数据表 将 dsFrom 调暗为新数据表

        For Each DBShoes In list
            Dim iShoeID As Integer
            iShoeID = DBShoes.sShoes_ID
            dsFrom = DBShoes.GetFullShoeDetails(iShoeID)
            For Each dr As DataRow In dsFrom.Rows
                newTable.ImportRow(dr)
            Next
        Next
        GridView1.DataSource = newTable
        GridView1.DataBind()

    Else

谢谢

Answer 1

我创建了一个带有两个 DataGridView 控件的表单。 这是表单的代码：

Public Class Form1

Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
    ' create table with single column
    Dim dt1 As New DataTable
    dt1.Columns.Add("Number", GetType(Integer))

    ' create another table with single column
    Dim dt2 As New DataTable
    dt2.Columns.Add("Number", GetType(Integer))

    ' fill first table with single row
    Dim r As DataRow = dt1.NewRow()
    r.Item(0) = 1
    dt1.Rows.Add(r)

    ' import all rows of first table into second table
    For Each row In dt1.Rows
        dt2.ImportRow(row)
    Next

    ' show tables
    DataGridView1.DataSource = dt1
    DataGridView2.DataSource = dt2
End Sub
End Class