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如何在ASP.NET表中动态添加多行?

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0

rybosome · 技术社区 · 16 年前

到目前为止,代码方面的情况如下:

Protected Sub btnAddRow7_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnAddRow7.Click

    Dim tableRow As New System.Web.UI.WebControls.TableRow
    Dim tableCell As New System.Web.UI.WebControls.TableCell
    Dim textBox As New System.Web.UI.WebControls.TextBox

    tableCell.Controls.Add(textBox)

    tableRow.Cells.Add(tableCell)

    tbl7.Rows.Add(tableRow)

End Sub

…但它只动态添加一行。在第一次添加之后,对按钮的更多单击不会添加更多的行。知道为什么吗?更好的方法?

2 回复 | 直到 16 年前

1

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Tim Schmelter 16 年前

您可以在Page.Load中重建表。例如:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    rebuildMyTable()
End Sub

Private Sub rebuildMyTable()
    If Me.ViewState("TableRowCount") Is Nothing Then Me.ViewState("TableRowCount") = 0
    For i As Int32 = 0 To CInt(Me.ViewState("TableRowCount")) - 1
        AddTableRow()
    Next
End Sub

Private Sub AddTableRow()
    Dim tableRow As New System.Web.UI.WebControls.TableRow
    Dim tableCell As New System.Web.UI.WebControls.TableCell
    Dim textBox As New System.Web.UI.WebControls.TextBox

    tableCell.Controls.Add(textBox)

    tableRow.Cells.Add(tableCell)

    Me.MyTable.Rows.Add(tableRow)
End Sub

Protected Sub BtnAddRow_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnAddRow.Click
    AddTableRow()

    If Me.ViewState("TableRowCount") Is Nothing Then
        Me.ViewState("TableRowCount") = 1
    Else
        Me.ViewState("TableRowCount") = CInt(Me.ViewState("TableRowCount")) + 1
    End If
End Sub

这是因为按钮事件发生在Viewstate注册之后。 http://msdn.microsoft.com/en-us/library/ms178472.aspx

2

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tomfanning 16 年前

HtmlTable似乎没有任何类型的ViewState感知,所以要么在每次回发时构建所有行,要么使用asp:Table or 一asp:Repeater instead.