我在我的 asp.net 项目中使用 UPDATE 命令时遇到问题。该项目允许用户通过登录页面登录，该登录页面将用户名和密码与数据库中的记录相匹配，并将用户名保存为 cookie。然后我有一个设置页面，我希望允许用户编辑他们的帐户详细信息，但是当我使用 UPDATE 功能时，查询执行时没有任何错误，但更新不会发生。我正在使用 AccessDataSource 和 UpdateCommand，希望有人能发现我的代码存在问题并引导我朝着正确的方向前进。提前致谢
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
Dim sqlcmd As String
sqlcmd = "SELECT FirstName, SecondName, UserName, DOB, Password FROM UserTable WHERE UserName = '" & Request.Cookies("UserInfo")("userName") & "'"
AccessDataSource1.SelectCommand = sqlcmd
If (Not Page.IsPostBack) Then
Dim sqlcmd2 As String
sqlcmd2 = "UPDATE [UserTable] SET [FirstName] = ?, [SecondName] = ?, [UserName] = ?, [DOB] = ?, [Password] = ? WHERE [UserID] = ? AND ISNULL (([FirstName] = ?) OR ([FirstName] IS NULL AND ? IS NULL)) AND (([SecondName] = ?) OR ([SecondName] IS NULL AND ? IS NULL)) AND (([UserName] = ?) OR ([UserName] IS NULL AND ? IS NULL)) AND (([DOB] = ?) OR ([DOB] IS NULL AND ? IS NULL)) AND (([Password] = ?) OR ([Password] IS NULL AND ? IS NULL))"
AccessDataSource1.UpdateCommand = sqlcmd2
End If
End Sub
<form id="webform" runat="server">
<div id="content">
<asp:AccessDataSource ID="AccessDataSource1" DataSourceMode = "DataSet" runat="server"
ConflictDetection="CompareAllValues" DataFile="~/Database.mdb"
OldValuesParameterFormatString="original_{0}"
UpdateCommand = "UPDATE [UserTable] SET [FirstName] = ?, [SecondName] = ?, [UserName] = ?, [DOB] = ?, [Password] = ? WHERE [UserID] = ? AND ISNULL (([FirstName] = ?) OR ([FirstName] IS NULL AND ? IS NULL)) AND (([SecondName] = ?) OR ([SecondName] IS NULL AND ? IS NULL)) AND (([UserName] = ?) OR ([UserName] IS NULL AND ? IS NULL)) AND (([DOB] = ?) OR ([DOB] IS NULL AND ? IS NULL)) AND (([Password] = ?) OR ([Password] IS NULL AND ? IS NULL))">
<UpdateParameters>
<asp:Parameter Name="UserID" Type="Int32" />
<asp:Parameter Name="FirstName" Type="String" />
<asp:Parameter Name="SecondName" Type="String" />
<asp:Parameter Name="UserName" Type="String" />
<asp:Parameter Name="DOB" Type="String" />
<asp:Parameter Name="Password" Type="String" />
<asp:Parameter Name="original_UserID" Type="Int32" />
<asp:Parameter Name="original_FirstName" Type="String" />
<asp:Parameter Name="original_FirstName" Type="String" />
<asp:Parameter Name="original_SecondName" Type="String" />
<asp:Parameter Name="original_SecondName" Type="String" />
<asp:Parameter Name="original_UserName" Type="String" />
<asp:Parameter Name="original_UserName" Type="String" />
<asp:Parameter Name="original_DOB" Type="String" />
<asp:Parameter Name="original_DOB" Type="String" />
<asp:Parameter Name="original_Password" Type="String" />
<asp:Parameter Name="original_Password" Type="String" />
</UpdateParameters>
</asp:AccessDataSource>
<asp:GridView ID="GridView1" runat="server" DataSourceID="AccessDataSource1">
<Columns>
<asp:CommandField ShowEditButton="True" />
</Columns>
</asp:GridView>
<div>
</div>
</div>
</form>
抱歉，如果有点乱，但这是我的第一篇文章，我不完全确定我在做什么。