当以下代码位于 VB 文件中时，__doPostBack JS 函数不起作用

Question

我创建了一个页面，让我的网站管理员编辑和添加数据库中表的记录。由于 ASP.NET gridview 不允许 INSERT（它只允许选择、编辑和删除），我在 VB 文件中添加了一些内容以允许 INSERT INTO 语句（并且它可以工作，因为它是使用和 asp:Button，它被转换为 html 作为 ，而不是 __doPostBack）。

问题是，当我添加代码时，除了根本无法使用登录状态（注销链接）之外，我无法在 gridview 上使用分页或排序（即使登录状态完全独立于 accessDataSource 或 这

实际文件：

    <asp:LoginStatus ID="LoginStatus1" runat="server" 
            LogoutAction="RedirectToLoginPage" />
        <asp:GridView ID="GridView1" runat="server" 
            AllowSorting="True" AutoGenerateColumns="False" CellPadding="4" 
            DataKeyNames="ID" DataSourceID="ADS" ForeColor="#333333" 
            GridLines="Horizontal" Width="100%" AutoGenerateDeleteButton="True" 
            AutoGenerateEditButton="True" AutoGenerateSelectButton="True">
           ...(irrelevant code omitted)
    <table>
        <tr><td class="style4"><asp:Label ID="lblID" runat="server" Text="ID"></asp:Label></td>
        <td class="style5"><asp:TextBox ID="tbID" runat="server" Width="127px"></asp:TextBox></td>
        <td class="style5">
            &nbsp;</td></tr>
        <tr><td class="style2"><asp:Label ID="lblHead" runat="server" Text="Head"></asp:Label></td>
        <td><asp:TextBox ID="tbHead" runat="server"></asp:TextBox></td>
        <td>
            <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" 
                ErrorMessage="Please enter a header" ControlToValidate="tbHead"></asp:RequiredFieldValidator>
            </td></tr>
        <tr><td class="style3"><asp:Label ID="lblBody" runat="server" Text="Body"></asp:Label></td>
        <td class="style1"><asp:TextBox ID="tbBody" runat="server"></asp:TextBox></td>
        <td class="style1"></td></tr>
        <tr><td class="style2"><asp:Label ID="lblBy" runat="server" Text="by"></asp:Label></td>
        <td><asp:TextBox ID="tbBy" runat="server"></asp:TextBox></td>
        <td></td></tr>
        <tr><td class="style2"><asp:Label ID="lblURL" runat="server" Text="URL"></asp:Label></td>
        <td><asp:TextBox ID="tbURL" runat="server"></asp:TextBox></td>
        <td>
            <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" 
                ErrorMessage="Please enter a valid url" ControlToValidate="tbURL"></asp:RequiredFieldValidator>
            <asp:RegularExpressionValidator ID="RegularExpressionValidator2" runat="server" 
                ErrorMessage="Please enter a valid url" ControlToValidate="tbURL" 
                Display="Dynamic" 
                ValidationExpression="http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&amp;=]*)?"></asp:RegularExpressionValidator>
            </td></tr>
        <tr><td class="style2"><asp:Label ID="lblDateposted" runat="server" Text="dateposted"></asp:Label></td>
        <td><asp:TextBox ID="tbDateposted" runat="server"></asp:TextBox></td>
        <td>
            <asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" 
                ErrorMessage="Please enter a valid date following the current format (mm/dd/yyyy) ignore the time." 
                ControlToValidate="tbDateposted"></asp:RequiredFieldValidator>
            <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" 

                ErrorMessage="Please enter a valid date following the current format (mm/dd/yyyy) ignore the time." 
                ControlToValidate="tbDateposted" Display="Dynamic" 
                ValidationExpression="^(?=\d)(?:(?:(?:(?:(?:0?[13578]|1[02])(\/|-|\.)31)\1|(?:(?:0?[1,3-9]|1[0-2])(\/|-|\.)(?:29|30)\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})|(?:0?2(\/|-|\.)29\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))|(?:(?:0?[1-9])|(?:1[0-2]))(\/|-|\.)(?:0?[1-9]|1\d|2[0-8])\4(?:(?:1[6-9]|[2-9]\d)?\d{2}))($|\ (?=\d)))?(((0?[1-9]|1[012])(:[0-5]\d){0,2}(\ [AP]M))|([01]\d|2[0-3])(:[0-5]\d){1,2})?$"></asp:RegularExpressionValidator>
            </td></tr>
        <tr><td class="style2">
            <asp:Button ID="submit" runat="server" Text="Update" /></td>
    </tr></table>

是VB文件：

Imports System.Data.OleDb

Partial Class staffcp_Default
    Inherits System.Web.UI.Page


    Protected Sub submit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles submit.Click
        Dim connStr As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("../App_Data/Signees.mdb")
        Dim dbConnection As OleDbConnection = New OleDbConnection(connStr)
        Dim SQL As New OleDbCommand
        dbConnection.Open()
        SQL.Connection = dbConnection
        SQL.CommandText = "INSERT INTO aae VALUES (" + tbID.Text + ", '" + tbHead.Text + "', '" + tbBody.Text + "', '" + tbBy.Text + "', '" + tbURL.Text + "', '" + tbDateposted.Text + "')"
        SQL.ExecuteNonQuery()
        dbConnection.Close()
        SQL.Connection.Close()
    End Sub  

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim SQLResult As Object
        Dim connStr As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("../App_Data/Signees.mdb")
        Dim dbConnection As OleDbConnection = New OleDbConnection(connStr)
        Dim SQL As New OleDbCommand
        dbConnection.Open()
        SQL.Connection = dbConnection
        SQL.CommandText = "SELECT COUNT (*) FROM aae"
        SQLResult = SQL.ExecuteScalar
        Dim count As Object = SQLResult
        dbConnection.Close()
        SQL.Connection.Close()
        tbID.Text = count.ToString + 1
        tbID.ReadOnly = True
    End Sub
End Class

任何帮助将不胜感激

[编辑]：我刚刚尝试了同样的事情，清除了VB文件：同样的问题，没有排序或分页（或在我现在很困惑。

[编辑]：我一直无法弄清楚页面底部的更新按钮的问题。

Answer 1

添加 ：
如果不是 page.isPostBack 到 page_load 事件中的代码