Question

ASP.NET新手。

我使用向导创建了一个sqldatasource并设置了基本选择查询（SELECT * FROM Accounts）。然后我让sqldatasource向导创建INSERT，EDIT和DELETE查询。将此数据源连接到gridview，并启用EDITING和DELETING。一切正常。 SELECT查询返回所有记录，我可以编辑/删除它们。

现在我需要向SELECT命令发送一个参数，以便将记录过滤到具有用户id的记录（从Membership.GetUser中提取）。当我添加此参数时，SELECT命令工作正常，但gridview中的EDIT / DELETE按钮不再起作用。

未生成错误。页面刷新但记录未在数据库中更新。我不明白出了什么问题。

CODE：

<%
Dim u As MembershipUser
Dim userid As String
u = Membership.GetUser(User.Identity.Name)
userid = u.ProviderUserKey.ToString

SqlDataSource1.SelectParameters("UserId").DefaultValue = userid

%>

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ID" DataSourceID="SqlDataSource1">
<Columns>
<asp:CommandField ShowDeleteButton="True" ShowEditButton="True" />
<asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False" 
ReadOnly="True" SortExpression="ID" />
<asp:BoundField DataField="UserId" HeaderText="UserId" 
SortExpression="UserId" />
<asp:BoundField DataField="AccountName" HeaderText="AccountName" 
SortExpression="AccountName" />
<asp:BoundField DataField="DateAdded" HeaderText="DateAdded" 
SortExpression="DateAdded" />
<asp:BoundField DataField="LastModified" HeaderText="LastModified" 
SortExpression="LastModified" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" 
ConnectionString="<%$ ConnectionStrings:CheckingConnectionString %>" 
DeleteCommand="DELETE FROM [Accounts] WHERE [ID] = @ID" 
InsertCommand="INSERT INTO [Accounts] ([UserId], [AccountName], [DateAdded], [LastModified]) VALUES (@UserId, @AccountName, @DateAdded, @LastModified)" 
SelectCommand="SELECT * FROM [Accounts] WHERE [UserId] = @UserId" 

UpdateCommand="UPDATE [Accounts] SET [UserId] = @UserId, [AccountName] = @AccountName, [DateAdded] = @DateAdded, [LastModified] = @LastModified WHERE [ID] = @ID">
<DeleteParameters>
<asp:Parameter Name="ID" Type="Int32" />
</DeleteParameters>
<InsertParameters>
<asp:Parameter Name="UserId" Type="String" />
<asp:Parameter Name="AccountName" Type="String" />
<asp:Parameter Name="DateAdded" Type="DateTime" />
<asp:Parameter Name="LastModified" Type="DateTime" />
</InsertParameters>
<UpdateParameters>
<asp:Parameter Name="UserId" Type="String" />
<asp:Parameter Name="AccountName" Type="String" />
<asp:Parameter Name="DateAdded" Type="DateTime" />
<asp:Parameter Name="LastModified" Type="DateTime" />
<asp:Parameter Name="ID" Type="Int32" />
</UpdateParameters>
<SelectParameters>
<asp:Parameter Name="UserId"/>
</SelectParameters>
</asp:SqlDataSource>

Answer 1

您确认记录仍在数据库中吗？并且这不仅仅是Grid在编辑，更新或删除后没有完成DataBind？这让我不止一次！

另请查看您的代码： SqlDataSource1.SelectParameters（“UserId”）。DefaultValue = userid

您正在设置SelectParameters ...但您也需要设置更新，删除等参数。

Answer 2

你为什么选择那种方法.getuser？ SQL命令行中的简单连接使用语句可以完成这项工作。你不需要一个向导。

Answer 3

找到答案。我将代码拉动会员提供程序密钥移动到datasource_selecting事件。

Protected Sub SqlDataSource1_Selecting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceSelectingEventArgs) Handles SqlDataSource1.Selecting
    ' Get a reference to the currently logged on user
    Dim currentUser As MembershipUser = Membership.GetUser()

    ' Determine the currently logged on user's UserId value
    Dim currentUserId As String = currentUser.ProviderUserKey.ToString()

    ' Assign the currently logged on user's UserId to the @UserId parameter
    e.Command.Parameters("@UserId").Value = currentUserId
End Sub

使用select参数时，Gridview删除/编辑无效

3 个答案: