我将在pmuserlist.aspx中传递所选的用户id，并将其传递给useredit.aspx。网格视图表数据来自mysql。例如，我想编辑id为“15001”的用户。然后我按了同一行的“编辑”按钮。我希望将“15001”传递到useredit.aspx
结果1
预期结果：预期结果
数据库结构：用户id是一个字符串。
pmuserlist.aspx文件

<asp:GridView ID="gvUserList" runat="server" AllowPaging="True" PageSize="5" SelectedIndex="0" >
                    <Columns>
                        <asp:BoundField DataField="user_id" HeaderText="User ID" SortExpression="id" />
                        <asp:BoundField DataField="name" HeaderText="Name" SortExpression="Name" />
                        <asp:BoundField DataField="contact_no" HeaderText="Contact no" SortExpression="Contact" />
                        <asp:BoundField DataField="email" HeaderText="Email" SortExpression="Email" />
                        <asp:BoundField DataField="role" HeaderText="Role" SortExpression="Role" />
                        <asp:TemplateField>
                            <ItemTemplate>
                                <asp:Button ID="BtnEdit"
                                    runat="server"
                                    Text="Edit"
                                    ForeColor="Black"
                                    CommandArgument='<%# Eval("user_id") %>'
                                    OnCommand="BtnEdit_Command"
                                    OnClientClick='<%# "javascript:return confirm(\"Edit [" + Eval("user_id") + "]\");"  %>' />
                            </ItemTemplate>

pmuserlist.aspx.cs

protected void BtnEdit_Command(object sender, CommandEventArgs e)
    {
        Session["userid"] = String.Format("PMUserList?user_id={0}", e.CommandArgument);
        string url = String.Format("PMUserList?user_id={0}", e.CommandArgument);
        Response.Redirect("UserEdit.aspx");
    }

用户编辑.aspx.cs

private void LoadData()
        {
            string userid = Session["userid"].ToString();*/
            string Query = "SELECT user_id, name, contact_no,email,role FROM mydb.User WHERE  user_id = " + userid + ";";
            .....}

错误消息（可选择“15001”，但传递“？15001”）：

{"You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '?user_id=15001' at line 1"}

请帮助我改进会话变量。谢谢您。