2

您好，我从一个单行 5 列的表开始。我添加了一个按钮和返回代码来添加额外的行。第一行显示正常，但之后保持在 2 行。正在调试页面。我已经阅读了 viewstate 我只是不完全了解如何添加它，如果这有意义的话。

编辑

     <asp:UpdatePanel ID="upTable" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="true">
    <Triggers>
            <asp:AsyncPostBackTrigger ControlID="btnNewRow" EventName ="click" />
    </Triggers> 
    <ContentTemplate>
            <div>
                <asp:Table ID="tblPrice" runat="server" GridLines="Both">
                    <asp:TableRow>
                        <asp:TableCell>QTY.</asp:TableCell>
                        <asp:TableCell>MATERIAL</asp:TableCell>
                        <asp:TableCell>COST</asp:TableCell>
                        <asp:TableCell>PRICE</asp:TableCell>
                        <asp:TableCell>TOTAL</asp:TableCell>
                    </asp:TableRow>
                    <asp:TableRow>
                        <asp:TableCell>
                            <asp:TextBox ID="tbQty1" runat="server" Width="40" Text="0"></asp:TextBox>
                        </asp:TableCell>
                        <asp:TableCell>
                            <asp:TextBox ID="tbMaterial1" runat="server"></asp:TextBox>
                        </asp:TableCell>
                        <asp:TableCell>
                            <asp:TextBox ID="tbCost1" runat="server" OnTextChanged="PriceChange" AutoPostBack ="true" Text="0"></asp:TextBox>
                            <asp:MaskedEditExtender ID="meeCost1" runat="server" Mask="99,999,999.99" DisplayMoney="Left" TargetControlID="tbCost1" MaskType="Number">
                            </asp:MaskedEditExtender>
                        </asp:TableCell>
                        <asp:TableCell>
                            <asp:TextBox ID="tbPrice1" runat="server" OnTextChanged="PriceChange" AutoPostBack="true"  Text="0"></asp:TextBox>
                            <asp:MaskedEditExtender ID="meePrice1" runat="server" Mask="99,999,999.99" DisplayMoney="Left" TargetControlID="tbPrice1" MaskType="Number">
                            </asp:MaskedEditExtender>
                        </asp:TableCell>
                        <asp:TableCell>
                            <asp:Label ID="lblTotal1" runat="server" Text="$0.00"></asp:Label>
                        </asp:TableCell>
                    </asp:TableRow>
                </asp:Table>
            </div>
        </ContentTemplate>
    </asp:UpdatePanel>
    <asp:Button ID="btnNewRow" runat="server" Text="Add Row" />

VB

Protected Sub btnNewRow_Click(sender As Object, e As EventArgs) Handles btnNewRow.Click
    Dim TRow As New TableRow()
    Dim qtyCell As New TableCell()
    Dim materialCell As New TableCell()
    Dim costCell As New TableCell()
    Dim priceCell As New TableCell()
    Dim totalCell As New TableCell()

    Dim qtyTB As New TextBox()
    Dim materialTB As New TextBox()
    Dim costTB As New TextBox()
    Dim priceTB As New TextBox()

    Dim costMEE As New AjaxControlToolkit.MaskedEditExtender
    Dim priceMEE As New AjaxControlToolkit.MaskedEditExtender

    Dim rowsCount As Integer = tblPrice.Rows.Count
    Dim rowsString As String = rowsCount.ToString

    qtyTB.Width = 40

    'configure the masked edit extender controls
    With costMEE
        .ID = "meeCost" & rowsString
        .Mask = "99,999,999.99"
        .DisplayMoney = AjaxControlToolkit.MaskedEditShowSymbol.Left
        .TargetControlID = "tbCost" & rowsString
        .MaskType = AjaxControlToolkit.MaskedEditType.Number
    End With
    With priceMEE
        .ID = "meePrice" & rowsString
        .Mask = "99,999,999.99"
        .DisplayMoney = AjaxControlToolkit.MaskedEditShowSymbol.Left
        .TargetControlID = "tbPrice" & rowsString
        .MaskType = AjaxControlToolkit.MaskedEditType.Number
    End With

    'Add masked edit extender to textboxes
    costTB.Controls.Add(costMEE)
    priceTB.Controls.Add(priceMEE)


    'add id names to the textboxes
    qtyTB.ID = "tbQty" & rowsString
    materialTB.ID = "tbMaterial" & rowsString
    costTB.ID = "tbCost" & rowsString
    priceTB.ID = "tbPrice" & rowsString

    'Add textbox to the table cells
    qtyCell.Controls.Add(qtyTB)
    materialCell.Controls.Add(materialTB)
    costCell.Controls.Add(costTB)
    priceCell.Controls.Add(priceTB)

    'Add table cells to the table row
    TRow.Cells.Add(qtyCell)
    TRow.Cells.Add(materialCell)
    TRow.Cells.Add(costCell)
    TRow.Cells.Add(priceCell)
    TRow.Cells.Add(totalCell)

    'Add table row to the table
    tblPrice.Rows.Add(TRow)
End Sub
4

1 回答 1

1

您不能在 ViewState 中存储 Table 对象，它不可序列化。考虑将您的代码更改为使用DataTable，否则您将需要手动编写代码将您的表转换为 DataTable ，这将是太多不必要的服务器处理。

将其更改为 DataTable 后，只需搜索 -“在 ViewState VB.NET 中存储 DataTable ”，就有足够多的示例了

于 2013-02-08T07:15:32.240 回答