Question

Public Function GridView_RowUpdating(sender As Object, _ 
                                e As GridViewUpdateEventArgs) As    Integer

    Dim ID As Integer = GridView1.DataKeys(e.RowIndex).Value
    Return ID

End Function

我需要在另一页上从myGridview编辑数据的id（datakey）。我该怎么办？

Answer 1

这个代码可以帮助你......

  <asp:GridView ID="grdViewTracking" runat="server" AllowPaging="True" AllowSorting="true"
                        OnSorting="grdViewTracking_Sorting" AutoGenerateColumns="False" BorderColor="#E7E7E7"
                        BorderStyle="Solid" BorderWidth="1px" OnPageIndexChanging="grdViewTracking_PageIndexChanging"
                        CellPadding="1" ForeColor="#666666" PageSize="10" Width="100%">
                        <Columns>
                            <asp:TemplateField HeaderText="#" ItemStyle-HorizontalAlign="Center">
                                <ItemTemplate>
                                    <table>
                                        <tr style="background-color: White">
                                            <td style="padding-left: 5px;">
                                                <%#DataBinder.Eval(Container.DataItem, "Number")%>
                                            </td>
                                        </tr>
                                    </table>
                                </ItemTemplate>
                                <ItemStyle Width="5%" />
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="Key" SortExpression="Key" ItemStyle-HorizontalAlign="Left">
                                <HeaderStyle HorizontalAlign="Left" CssClass="PaddingLeft5" />
                                <ItemTemplate>
                                    <table>
                                        <tr style="background-color: White">
                                            <td style="padding-left: 5px">
    ***<asp:LinkButton ID="lnkkey" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "Key")%>'></asp:LinkButton>***

                                                <input type=hidden runat="server"   id="hfid" value=' <%#DataBinder.Eval(Container.DataItem, "Appsettingid")%>' />
                                            </td>
                                        </tr>
                                    </table>
                                </ItemTemplate>
                                <ItemStyle Width="15%" />
                            </asp:TemplateField>

以下代码将控制转移到第二页，即编辑页面.....

protected void grdViewTracking_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            BusinessLogicPOS.AppSettingArgs ob = e.Row.DataItem as BusinessLogicPOS.AppSettingArgs;
            LinkButton lnkkey = e.Row.FindControl("lnkkey") as LinkButton;
            lnkkey.PostBackUrl = "AppSetting.aspx?AppSettingId=" + ob.AppSettingId.ToString();
        }

检查参考：

example

Answer 2

最简单的方法就是这样。

在WebForm1标记处使用这两种方法中的任何一种

一个。使用asp:TemplateField

<asp:TemplateField>
    <ItemTemplate>
        <asp:HyperLink ID="EditLink" runat="server" 
                NavigateUrl='<%# "~/WebForm2.aspx?id=" + Eval("ID") %>'
                Text="Update" />
    </ItemTemplate>
</asp:TemplateField>

湾使用asp:HyperLinkField

<asp:HyperLinkField Text="Update"
    DataNavigateUrlFields="ID"
    DataNavigateUrlFormatString="~\WebForm2.aspx?id={0}"          
    HeaderText="Action" />

在WebForm2代码隐藏处执行此操作

Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load
    If Not IsPostBack Then
        If Request.QueryString("id") IsNot Nothing Then
            Dim passedID As String = Request.QueryString("id")
            'populate the fields using .FirstOrDefault
        Else
            'no id passed. cannot process
        End If
    End If
End Sub

如何从GridView_RowUpdating获取值

2 个答案: